1: General Asylum, RE: Effects of "infinite" music? (0.00)
Posted by 91derlust on 2024-11-23, 16:59:06 (101.180.214.157)
I don't think about it often. I'm approaching my mid-50s - enjoyed the search and social aspects of music stores - and rarely use physical media any more. This morning I've been listening to Portico Q .......

2: SET Asylum, RE: Copper vs. Silver (0.00)
Posted by 91derlust on 2024-09-14, 18:57:34 (101.180.214.157)
No sure what amp you are looking at, but if the transformers are small, I'd guess Gordon has used a permalloy parallel feed arrangement, common for his lower power builds. .......

3: Inmate Central, Ah, beliefs. (0.00)
Posted by 91derlust on 2023-08-26, 17:36:48 (101.188.130.27)
A beginning of understanding why some people (well, perhaps their identities/ egos/ selves... built upon their beliefs) invest more effort, thinking, time, and emotion on audio forums than simply expe .......

4: Digital Drive, RE: Marantz CDP (SA-10) USB input with Lumin (0.00)
Posted by 91derlust on 2023-04-25, 01:25:58 (101.183.217.17)
I've not done it, but suspect if the Marantz runs UAC2 protocol for its USB, it will work fine via USB with a LUMIN. The LUMIN runs a Linux OS, which like a Mac, runs UAC2 compliant USB. So, if the Ma .......

5: Tube DIY Asylum, RE: Here is an article I translated by DHTRob going (0.00)
Posted by 91derlust on 2023-02-10, 14:30:04 (101.183.217.17)
Casting my mind back, I remember there being a few errors in one his PSUD articles. .......

6: General Asylum, Yep... (0.00)
Posted by 91derlust on 2023-02-04, 21:40:14 (101.183.217.17)
A deed selfless done with an expectation of something in return is not a selfless deed... it's an investment. .......

7: Digital Drive, Sure, but that is only part of the picture. (0.00)
Posted by 91derlust on 2023-01-05, 22:58:54 (1.156.154.57)
And better DACs - or DACs more to one's liking - can be had for more. In audio, ye olde internal versus external validity trade-off bites hard. It's real, if ignored. Motivated reasoning dominates for .......

8: Digital Drive, Wrong forum? nt. (0.00)
Posted by 91derlust on 2023-01-05, 22:45:55 (1.156.154.57)
Can't help with your question... but there is room for everyone in this asylum. No need to use the back door. :) This forum is okay, but you might have more success in the PC Audio ward. See what resp .......

9: General Asylum, RE: Something for us to argue about :-) Isn't it time we stop misusing "subjectivist" and "objectivist"? (0.00)
Posted by 91derlust on 2023-01-04, 01:32:21 (1.156.154.57)
...-precision, reliability, and external validity. .......

10: SET Asylum, Wrong forum? nt. (0.00)
Posted by 91derlust on 2022-11-05, 19:46:40 (124.176.13.20)
. .......

11: SET Asylum, Yep. nt. (0.00)
Posted by 91derlust on 2022-07-27, 04:07:14 (124.176.45.77)
. .......

12: High Efficiency Speaker Asylum, RE: yeah, but he is looking for a woofer ("80 to 300 Hz", per the OP) (nt) (0.00)
Posted by 91derlust on 2022-07-15, 22:17:40 (124.176.10.70)
Agreed Tom. People's arguments that big drivers require big power are a simplification and often misleading. Very happy running my 604 with single-digit SE watts, although greater PP SS watts are nice .......

13: General Asylum, RE: REVIEW: V-Cap CuTF Passive Components (0.00)
Posted by 91derlust on 2022-06-24, 19:48:13 (124.176.22.52)
I this a review of V-Cap ODAM or CuTF capacitors? Subject title says CuTF and the review refers to ODAM. .......

14: SET Asylum, Nice looking speakers! (0.00)
Posted by 91derlust on 2022-05-03, 13:29:54 (1.156.240.211)
And SETs may do nicely indeed. Worth a try, I think. .......

15: SET Asylum, RE: The Ultimate 2A3 SET amp (0.00)
Posted by 91derlust on 2022-03-31, 13:22:35 (124.176.7.118)
For me, yes. Where practical, I like to run nominal loads a touch higher than what many people would think is optimal/efficient. Higher loads and inductance are not really a problem for quality custom .......

16: SET Asylum, RE: The Ultimate 2A3 SET amp (0.00)
Posted by 91derlust on 2022-03-26, 14:12:32 (124.176.7.118)
A lot has changed in 80 years. Based on my limited experience, I prefer higher voltage/lower current operating points. .......

17: High Efficiency Speaker Asylum, Zero TA XD? Nt. (0.00)
Posted by 91derlust on 2022-03-26, 01:31:59 (124.176.7.118)
. .......

18: Inmate Central, RE: It's not supposed to be audio... (0.00)
Posted by 91derlust on 2022-02-27, 12:50:44 (1.156.172.110)
Not saying that IC is for audio discussions. I'm saying that AA is nominally for audio discussions and some inmates are investing much more effort and time on topics unrelated to audio. .......

19: Inmate Central, RE: no great loss... (0.00)
Posted by 91derlust on 2022-02-26, 23:33:27 (1.156.172.110)
Rarely, I get lost and wander into that ward and engage, if briefly before I come to my senses. Many inmates seem to spend more time in there banging on about about their personal beliefs than they do .......

20: SET Asylum, RE: Plate load resistors +1 (0.00)
Posted by 91derlust on 2022-02-18, 12:46:26 (1.156.172.110)
I've had success with those Mills precision WW. They'd be my go to if they were available. Edit: they were the MR200 series. .......

21: Digital Drive, RE: Wretched excess - CH Precisions D1.5 disc player (0.00)
Posted by 91derlust on 2022-02-18, 00:22:35 (1.156.172.110)
So, your point is that some people can get satisfying sound at less cost than offered by that component. And? That is in the realm of the personal belief and expectation. Some enlightened folks would .......

22: Inmate Central, True that! ;) nt. (0.00)
Posted by 91derlust on 2022-02-16, 19:33:45 (165.86.71.72)
. .......

23: Inmate Central, RE: I read that tens of thousand protested mandates last weekend in Canberra (0.00)
Posted by 91derlust on 2022-02-16, 16:56:10 (165.86.71.72)
A small but active portion of the Australian population, protesting mandatory COVID vaccination and other measures. A few fading politicians are stoking the situation leading into an election in a cou .......

24: Inmate Central, RE: It was taken at least a year ago. Maybe longer. (0.00)
Posted by 91derlust on 2022-02-16, 14:04:24 (165.86.71.72)
Old Ghost is correct - it is (was) a temporary quarantine facility for people returning from COVID hotspots. That video says very little: police were engaged to ensure she went to HS for quarantine... .......

25: Inmate Central, RE: It's in recent memory when Australia took the guns. (0.00)
Posted by 91derlust on 2022-02-16, 13:47:28 (165.86.71.72)
I have, first hand. No, Australia is not nearly a police state. Motivated reasoning is strong in this one. .......

26: Tube DIY Asylum, RE: Hammond Interstage Transformers (0.00)
Posted by 91derlust on 2022-02-13, 19:51:29 (165.86.71.72)
I like a good rant. And I'm on board with it. Thanks. .......

27: Tube DIY Asylum, RE: the "concepts" are not defects ... (0.00)
Posted by 91derlust on 2022-02-07, 16:56:18 (165.86.81.72)
Beliefs. Desires and expectations. Strategies. Motivated reasoning. Rhetoric. Nothing more or less. A lot of people want to belong to an exclusive club and want to be or have a guru. People want to be .......

28: Tubes Asylum, RE: EML2A3 Mesh (0.00)
Posted by 91derlust on 2022-02-05, 01:03:44 (1.156.172.110)
Yes. And I think they sound more to my liking at that operating point (with suitable load) than the more classic 60mA/250V operating point. I find that with the solid plates (I've heard both at differ .......

29: Digital Drive, RE: choose a dac (0.00)
Posted by 91derlust on 2022-02-05, 00:52:31 (1.156.172.110)
I'm not sure I follow. The Edcore is the upgrade(?) or what is being replaced? It's a pretty agricultural signal transformer. .......

30: Tube DIY Asylum, RE: Would cathode bypass capacitor at input stage affect output impedance? (0.00)
Posted by 91derlust on 2022-02-04, 12:36:56 (1.156.172.110)
If it affects them plate impedance of the output tube, then yes, it would affect the output impedance of an amplifier. The significance of this practice is multi factorial. .......

31: Tube DIY Asylum, RE: world class ... (0.00)
Posted by 91derlust on 2022-01-26, 00:37:08 (1.156.246.167)
Serious Stereo has had some good props from some people at some RMAFs. The favourable opinions are not a universal. I've read some that were quite the opposite. We pick and choose - that's the nature .......

32: Tube DIY Asylum, RE: To ge the majic from PP you need to (0.00)
Posted by 91derlust on 2022-01-14, 13:58:23 (124.176.240.94)
Pointer to the Crowhurst article if you have it hand? Thanks. .......

33: Tube DIY Asylum, RE: How do you like the bass produced by SET but not PP amp (0.00)
Posted by 91derlust on 2022-01-10, 14:29:11 (165.86.71.72)
I really like the bass from my little 2.5W SET amp: as good if not better (in my system) than my Metaxas power amp, which is a fine sounding device. The speakers in that system are designed specifical .......

34: High Efficiency Speaker Asylum, RE: If the impedance is benign (0.00)
Posted by 91derlust on 2021-11-06, 16:08:46 (1.156.141.108)
When thinking through power and gain for a system design, I aim to keep the H2 distortion if the output tube at A quick look at the WE300B gives plenty of operating points with their calculated H2 an .......

35: General Asylum, RE: Bye bye Listening Room (0.00)
Posted by 91derlust on 2021-11-04, 12:30:55 (1.156.141.108)
Sorry for confusion, when I say mounted, I mean positioned close to wall. What you show is really close indeed! .......

36: General Asylum, RE: Bye bye Listening Room (0.00)
Posted by 91derlust on 2021-11-03, 14:13:50 (1.156.141.108)
Speakers designed for boundary reinforcement load a room differently. Speakers designed for this have different compromises. On balance, I really like it. .......

37: General Asylum, Maybe it is an opportunity? (0.00)
Posted by 91derlust on 2021-11-03, 14:05:35 (1.156.141.108)
Constraints can drive creative thinking and solutions...- having you explore options you might not other wise...- and finding surprising benefits. Maybe. .......

38: General Asylum, RE: Bye bye Listening Room (0.00)
Posted by 91derlust on 2021-11-03, 14:03:14 (1.156.141.108)
For so many reasons I'd like to see more speakers designed to take advantage of boundary reinforcement. Especially in two way speakers with a mid-bass driver, much is given up in trying to achieve con .......

39: General Asylum, RE: Yes, I did (0.00)
Posted by 91derlust on 2021-11-03, 01:02:41 (1.156.141.108)
Yep, both positive and negative. It is interesting to learn how humans (believe they can) spot the biases in others, yet are largely oblivious to their own. That is being human...- it is in our wiring .......

40: High Efficiency Speaker Asylum, RE: JBL 4309 (0.00)
Posted by 91derlust on 2021-10-16, 02:34:38 (1.156.141.108)
It is moderate efficiency at best, with a pretty bumpy impedance. Probably doesn't belong on this forum. Cheers. .......

41: General Asylum, RE: Follow the link that Abe provided -nt (0.00)
Posted by 91derlust on 2021-10-14, 22:12:20 (1.156.141.108)
Irrespective of the copy, I see Klipsch Heritage speakers, but not the corner horns. .......

42: SET Asylum, RE: Book operating point seems to sound very good (0.00)
Posted by 91derlust on 2021-10-13, 05:01:14 (1.156.141.108)
I like a higher voltage relative to current: a higher rp operating point. 50mA/300V or 42mA/250V with 4k2 loads. I've wanted to try 60mA or even 50mA/350V for the 300B or higher dissipation 2A3 with a .......

43: SET Asylum, RE: 2a3 and 6B4G amps and tubes - favourites? (0.00)
Posted by 91derlust on 2021-10-13, 03:40:24 (1.156.141.108)
Tough to answer Andy. It depends on operating points. Some folks say the 2A3 types are slightly more linear and better sounding than 300Bs. Run the curves with different loads and you will quickly fin .......

44: Tube DIY Asylum, Paul does some nice work. Enjoy! nt. (0.00)
Posted by 91derlust on 2021-10-04, 15:34:43 (165.86.81.71)
. .......

45: SET Asylum, RE: Odeon speaker lineup (0.00)
Posted by 91derlust on 2021-09-24, 12:55:47 (1.156.141.108)
I hear you: past experiences suggest we'd prefer a lower crossover point. Still, that little 6.5" driver should be good up to and beyond crossover point and I'd need to listen for a while before I kne .......

46: SET Asylum, RE: Thanks! (0.00)
Posted by 91derlust on 2021-09-14, 15:20:44 (1.156.156.16)
I was going to say the money is not so little...- the point is though that they appear to represent good value at their price point. Let us know what you think when you've lived with them for a while. .......

47: SET Asylum, RE: Thanks! (0.00)
Posted by 91derlust on 2021-09-14, 03:22:02 (1.156.156.16)
Just quietly off topic: those Odeon Rigoletto 2020 speakers do something for me. When I downsize, they are on the list! Back to normal programming. Cheers. .......

48: SET Asylum, RE: Strongly Disagree with This (0.00)
Posted by 91derlust on 2021-09-10, 19:02:07 (1.156.156.16)
>>> Much of the credit for this performance admittedly goes to the OPTs - Magnequest FS-100 with 10K primaries. Don't know if anything comparable is still available. We can get custom-wound CC cores, .......

49: SET Asylum, RE: Its all about the OPT (0.00)
Posted by 91derlust on 2021-09-10, 13:59:21 (1.156.156.16)
As a rule of thumb, yes, as power requirements of output transformers increase, it becomes more difficult to get good performance. I think really, really good transformers can be wound for amplifiers .......

50: SET Asylum, RE: Transmitter Tube SET. What Are Your Overall Experiences? (0.00)
Posted by 91derlust on 2021-09-08, 19:04:28 (165.86.81.72)
I drafted and post... then decided not post it. But now... Those speakers appear to like a low, but maybe not ultra low, impedance drive. And JBL bass drivers have developed a bit of a rep for needing .......

51: Tube DIY Asylum, RE: How does it sound/perform? (0.00)
Posted by 91derlust on 2021-08-13, 15:21:13 (1.156.220.172)
From what I understand, with actual music, at roughly 2% H2 distortion, 50% of listeners will identify it, 50% won't. That said, I like to be well below that level of distortion when listening. The 2A .......

52: Tube DIY Asylum, Well said Dave. Nt. (0.00)
Posted by 91derlust on 2021-06-11, 13:26:51 (1.156.246.36)
. .......

53: Tubes Asylum, Thanks for the info C'stream. Nt. (0.00)
Posted by 91derlust on 2021-06-10, 13:40:22 (1.156.246.36)
. .......

54: Tube DIY Asylum, RE:can we not polute an audio forum with political BS ?? (0.00)
Posted by 91derlust on 2021-06-10, 01:24:17 (1.156.246.36)
It is curious... and the nature of how our beliefs are formed and motivated reasoning and bias play out. We are all susceptible. There are practices that can help us become more aware and lessen the i .......

55: Tubes Asylum, RE: All my builds utilize two switchs wired so B+ won't come on until filament is turned on first. End of problem. (0.00)
Posted by 91derlust on 2021-06-10, 01:10:56 (1.156.246.36)
I have a similar arrangement for my directly coupled amp. In my case it does not matter which switch is flipped first: flip one switch and filaments/heaters do their thing; flip the other and B+ gets .......

56: Tube DIY Asylum, RE: buy the best ... (0.00)
Posted by 91derlust on 2021-06-09, 01:19:44 (1.156.246.36)
And I'd speculate your system sounds better - or more to my liking - than the Serious Stereo rig. The (very) occasional Serious Stereo best of RMAF from back in the day? Meh. .......

57: General Asylum, RE: AN is actually pretty reasonable... (0.00)
Posted by 91derlust on 2021-06-08, 01:38:57 (1.156.246.36)
As a side note: my transformer winder actually suggests OCC Cu over Ag for their top level nanocrystalline core transformers. They are happy to wind Ag, but... Cheers. .......

58: General Asylum, Have you been educated? (0.00)
Posted by 91derlust on 2021-06-06, 20:27:17 (165.86.81.72)
My cat sleeps on our SET monoblocks and DAC. Took her some time to teach me they are primarily her winter bed and secondarily for music. ;^) I'm fine with it, providing she does not damage them. ::: .......

59: Tube DIY Asylum, RE: Amplifier Progress (0.00)
Posted by 91derlust on 2021-05-30, 22:51:03 (49.197.100.124)
Cool idea having the bias adjustment on bottom. I like seeing interesting solutions. Cheers. .......

60: Tube DIY Asylum, RE: FET ripple filters (0.00)
Posted by 91derlust on 2021-05-26, 03:41:39 (144.131.188.58)
I did consider these echokes but decided to go with all physical chokes for my next build. I will revisit the idea though! .......

61: Tube DIY Asylum, You just referred to yourself in the 3rd person. (0.00)
Posted by 91derlust on 2021-05-21, 22:40:12 (144.131.188.58)
Is that really you DT? And more importantly, and sincerely, are you okay? .......

62: Tube DIY Asylum, Hi Jeff. (0.00)
Posted by 91derlust on 2021-05-13, 13:54:07 (144.131.188.58)
" The first thing to get "right" is using a transducer of appropriate efficiency if you are going to be playing with low power SE tube amplifiers. Then he can dump the noisy preamplifiers. Why nobody .......

63: Tube DIY Asylum, RE: Interesting . . . and Confusing - Some History (0.00)
Posted by 91derlust on 2021-05-10, 15:31:54 (165.86.81.72)
I was not aware of the history or what may have transpired in the interim... a search was a good idea, especially considering the OP is rarely seen here. Yeah, it's interesting see how humans' beliefs .......

64: Tube DIY Asylum, RE: noise (0.00)
Posted by 91derlust on 2021-05-09, 18:04:13 (144.131.188.58)
Hi Mike, Just to clarify, are you running DC on the filaments of the LowMu power amplifier? Does the hum change with volume level or is it consistent, irrespective of volume? How loud is the hum - I a .......

65: Tube DIY Asylum, Actually, that is not clear. (0.00)
Posted by 91derlust on 2021-05-08, 23:42:54 (144.131.188.58)
"Using dc reg on both filament and high voltage supplies on the pre." I read this as he is using regulation on both the filaments and B+ of the pre. It could also mean something different. So, I'm no .......

66: Tube DIY Asylum, RE: noise (0.00)
Posted by 91derlust on 2021-05-08, 14:07:23 (144.131.188.58)
The Dr low mu amps powered the 2a3 filaments from a CT transformer, AC without any further nulling. If that is the case with your amp, it will be one significant source of noise. .......

67: Tube DIY Asylum, That's how I see it too. (0.00)
Posted by 91derlust on 2021-05-06, 21:28:33 (165.86.81.71)
Not that I have ever used it... but might in my next build (and in modifying my present amp). .......

68: Tube DIY Asylum, Yep. nt. (0.00)
Posted by 91derlust on 2021-05-06, 16:34:02 (165.86.81.71)
. .......

69: Tube DIY Asylum, RE: Ground Network (0.00)
Posted by 91derlust on 2021-05-06, 13:15:49 (165.86.81.71)
The valve wizard covers something similar in his grounding chapter, available from his website. No link for you right now but you should be able to search it easily. Gotta run. Edit: added link ::: TO .......

70: General Asylum, RE: Need recomendations for low voltage Audio caps (0.00)
Posted by 91derlust on 2021-05-03, 00:51:43 (144.131.188.58)
How much are you willing to spend? Lefson C-Mod are apparently designed for the task. .......

71: SET Asylum, RE: Just to have something posted since 4/18 (0.00)
Posted by 91derlust on 2021-04-29, 20:00:52 (165.86.71.72)
Nice aesthetics. I wish that I has the skill and skill and equipment to do the woodworking part. Curious to see how this turns out. .......

72: SET Asylum, RE: OK, Great ........................ (0.00)
Posted by 91derlust on 2021-03-27, 20:36:56 (101.177.140.174)
As I said, I agree with your point in principle and would do similar if biamping. I think biamping is great approach for the reasons you suggested. My point was that the severity and significance of s .......

73: SET Asylum, RE: OK, Great ........................ (0.00)
Posted by 91derlust on 2021-03-27, 17:02:12 (101.177.140.174)
I agree with the main premise and suggestions. I'd just like to add that the inductance and capacitance (and it affect on high-frequency performance) seems often overstated. A good winder using suitab .......

74: SET Asylum, Are you parodying yourself? (0.00)
Posted by 91derlust on 2021-03-14, 14:16:08 (101.179.80.107)
Or are you being serious? I honestly can't tell, and I'm from the great southern land of irony. .......

75: SET Asylum, RE: You rely on science too much. Not getting sick is an art. nt (0.00)
Posted by 91derlust on 2021-03-11, 21:24:25 (165.86.71.72)
And we are right back to my original thought that Dennis, Jeff and the MLP are a fine example of how humans form beliefs and engage in faulty decision-making. .......

76: SET Asylum, RE: another brilliant essay by DF (0.00)
Posted by 91derlust on 2021-03-10, 22:21:23 (49.197.139.27)
Well, I truly hope they are not paying a fee. And inhereting containers is better than inheriting debt. Shame about the lack of chanting though. ;^) .......

77: SET Asylum, :^) nt. (0.00)
Posted by 91derlust on 2021-03-10, 18:51:19 (165.86.71.72)
. .......

78: SET Asylum, RE: Nice speech Dennis but (0.00)
Posted by 91derlust on 2021-03-10, 16:54:13 (165.86.71.72)
And all DHT is where I'm headed. You may have gathered, 91derlust is my curmudgeon AA self and shoshin something a bit different for more other times and places. :) .......

79: SET Asylum, RE: Nice speech Dennis but (0.00)
Posted by 91derlust on 2021-03-10, 14:18:04 (165.86.81.72)
Do tone controls adjust the frequency response and/or increase distortion artefacts? While a small amount of lower order distortion is essentially unnoticed, or may add a subtle enhancement to reprodu .......

80: SET Asylum, RE: another brilliant essay by DF (0.00)
Posted by 91derlust on 2021-03-10, 12:32:14 (121.213.176.125)
They pay a fee?! And apparently refer themselves as "elite". Interesting. .......

81: SET Asylum, Got it. Thanks Tre!. nt (0.00)
Posted by 91derlust on 2021-03-10, 02:12:14 (121.213.176.125)
. .......

82: SET Asylum, RE: "perfect linearity"......Yep I remember ... (0.00)
Posted by 91derlust on 2021-03-10, 02:10:50 (121.213.176.125)
And that is the direction I am going too Willie: all DHT. I just want to try it and see what happens. Then maybe a DHT spud amp for office duty... and all IDH Pentode to see what that is like?But tha .......

83: SET Asylum, RE: Nice speech Dennis but (0.00)
Posted by 91derlust on 2021-03-09, 17:50:34 (165.86.81.71)
Perhaps Tre, Dennis believes what he is saying. Jeff too. And their acolytes. Fairly recent research is showing us that, despite what we may think, humans develop their beliefs by hearing/seeing somet .......

84: SET Asylum, RE: "I have always heard the Korneff Amps were the best 45 amp" (0.00)
Posted by 91derlust on 2021-03-07, 19:12:16 (165.86.81.72)
Jack's DRD amps had a rep for being a bit on the sonic steely side of things. From memory, the Welbourne interpretation used a different driver, ran the output tubes more conservatively and probably h .......

85: SET Asylum, RE: New 45 SET Amps - can they play wideband? (0.00)
Posted by 91derlust on 2021-03-06, 13:45:25 (49.197.139.27)
DT, yeah, I did not read through that linked mess and I don't intend to - I've read and engaged Jeff enough for one life. My point is: if you have something of you own experience to share, do it clear .......

86: SET Asylum, RE: New 45 SET Amps - can they play wideband? (0.00)
Posted by 91derlust on 2021-03-06, 01:44:42 (121.213.176.125)
I was a bit grumpy when I made that post. It was not the place to post about Jeff and MLP cabal's... Regarding your views on the 45, I did not confuse them because I don't know what they are: you only .......

87: SET Asylum, RE: Again.... As I said ..... 'TBA' ............... (0.00)
Posted by 91derlust on 2021-03-06, 01:26:56 (121.213.176.125)
Brisbane, not far from Mt. Nebo, about three hours drive south of Hervey Bay. It is a lovely area up there - not a bad place to "winter" at all! If ever you are back this way, let me know. Would be mo .......

88: SET Asylum, RE: Depends on where he crosses over.... (0.00)
Posted by 91derlust on 2021-03-05, 13:31:10 (121.213.176.125)
Depending on the order of the (electrical and mechanical) crossover, they may be producing something below that... perhaps at 120Hz? Likely not an issue... I just get a bit nervous about noise with th .......

89: SET Asylum, RE: New 45 SET Amps - can they play wideband? (0.00)
Posted by 91derlust on 2021-03-05, 13:26:24 (121.213.176.125)
Jeff's, and now your, posts here are a good example of how humans form beliefs and incorporate them into their reasoning, decision making, and behaviour. And why it helps to have some understanding of .......

90: SET Asylum, RE: Depends on where he crosses over.... (0.00)
Posted by 91derlust on 2021-03-05, 13:02:43 (121.213.176.125)
Yeah, depends on the crossover point and order... I can't imagine those horns producing much output at 120Hz so it will probably be okay, though I'm not sure what level the sidebands might be? I hope .......

91: SET Asylum, RE: Under her dress......... (0.00)
Posted by 91derlust on 2021-03-05, 01:30:02 (121.213.176.125)
Will AC filaments on the 45 be quiet enough on those horns? .......

92: Computer Audio Asylum, RE: Exactly..... (0.00)
Posted by 91derlust on 2021-02-15, 22:52:22 (121.214.66.56)
I'm not quite sure what the cause of the differences are, but differences certainly exist to my hearing. Differences between digital connections on the same server, different players on the same serve .......

93: Tube DIY Asylum, The OP is referring to the output impedance of the PS, not the amplifier. nt (0.00)
Posted by 91derlust on 2021-02-15, 00:34:06 (121.214.66.56)
. .......

94: Tube DIY Asylum, RE: Question about power transformer rating with LC choke and others (0.00)
Posted by 91derlust on 2021-02-15, 00:28:35 (121.214.66.56)
And I will add to Dave's informative post that if you are running SS diodes for rectification and do not use some sort of soft start or massive bleeder resistors, with Lcrit input you WILL have high v .......

95: Tube DIY Asylum, RE: Why is so important a low PS output impedance? (0.00)
Posted by 91derlust on 2021-02-14, 13:11:12 (165.86.81.72)
I saw PS impedance mentioned but not explained. Maybe it was covered and I missed it on first glance? Edit: on looking at the paper again, I find it to be misleading in its explanation of PS impedance .......

96: Computer Audio Asylum, RE: Roon 1.8 (0.00)
Posted by 91derlust on 2021-02-14, 01:50:30 (121.214.66.56)
In my system, which already sounds relaxed, the previous version of Roon seemed to present music as a little dull. Not sure this latest version is a step in the right direction for me though I will tr .......

97: Computer Audio Asylum, RE: Exactly..... (0.00)
Posted by 91derlust on 2021-02-14, 01:28:53 (121.214.66.56)
Oops, I was referring generally and this branch is referring to latency-related configuration specifically. My bad. Cheers. .......

98: Computer Audio Asylum, RE: Exactly..... (0.00)
Posted by 91derlust on 2021-02-13, 13:17:59 (121.214.66.56)
I've noticed musically meaningful differences between streamers, servers, software, etc. for them warrant attention. I'd like that not to be the case, but that does not make it so. .......

99: Computer Audio Asylum, RE: Roon 1.8 (0.00)
Posted by 91derlust on 2021-02-13, 13:11:19 (121.214.66.56)
I like the UX and may try it again soon. It would be helpful to have some idea as to whether the expected gains are worth effort; I have enough work, professional development and projects in my life t .......

100: Computer Audio Asylum, RE: Roon 1.8 (0.00)
Posted by 91derlust on 2021-02-13, 02:12:36 (121.214.66.56)
What are the sonic improvements? I've found the last few versions of Roon to present music in a rather uninspiring way. LMS simply presents music more to my liking: musical expression seems much more .......

101: SET Asylum, J&K Audio Design (0.00)
Posted by 91derlust on 2021-02-12, 13:03:37 (121.214.66.56)
I've had good results from J&K Audio Design. Not the best site - they are very responsive to email and happy to work through custom designs with you, if that is what is needed. They also have a Facebo .......

102: Tube DIY Asylum, Wabi-sabi. nt (0.00)
Posted by 91derlust on 2021-02-08, 13:27:44 (121.214.66.56)
. .......

103: Tube DIY Asylum, Thanks for the additional information. (0.00)
Posted by 91derlust on 2021-01-16, 16:51:22 (101.177.128.74)
A lot to digest, which I will, given time. In the meantime are a lot of people using SiC diodes without sinking in C-input filters without issue. That is not to say they will always be fine, but sugge .......

104: Tube DIY Asylum, Thanks muchly! nt. (0.00)
Posted by 91derlust on 2021-01-14, 12:29:48 (101.177.128.74)
. .......

105: Tube DIY Asylum, RE: That is not a problem... (0.00)
Posted by 91derlust on 2021-01-13, 23:54:37 (101.177.128.74)
Good info. For those of us running say 100mA B+ and C-input, are we going to have a problem with an un-sunk 5A SiC diode? At 200mA? Armed with an understanding of the peak and RMS current through the .......

106: Tube DIY Asylum, RE: change to air Core Inductors @ 8 gauge and THEN have a listen~nT (0.00)
Posted by 91derlust on 2021-01-05, 11:52:56 (101.177.128.74)
It is interesting you mention that. I have just those types of inductors wound to replace the iron core inductors on the bass. They have been sitting on the shelf for years - never got around to using .......

107: Tube DIY Asylum, RE: Thanks, I remember now but.... (0.00)
Posted by 91derlust on 2021-01-05, 11:50:26 (101.177.128.74)
For sure. The recovery design goal will not apply to every situation. .......

108: Tube DIY Asylum, Let me try... but I'm no EE. (0.00)
Posted by 91derlust on 2021-01-04, 22:09:27 (101.177.128.74)
I think in that part of the paper, Thorsten was combining two goals: low output impedance and fast enough capacitor charging/ PS recovery. He had calculated an ideal last PSU cap size to give low impe .......

109: Tube DIY Asylum, He did... (0.00)
Posted by 91derlust on 2021-01-04, 02:46:58 (101.177.128.74)
well, at least that is my way of thinking right now. I tend to design PSUs according to his design objectives in the "Thoughts about single-ended amplifiers" paper, re impedance and DCR. Modern SiC di .......

110: Rocky Road, RE: Favorite 2020 Releases. (0.00)
Posted by 91derlust on 2021-01-03, 14:21:26 (101.177.128.74)
Will give these a listen today. Thanks! .......

111: SET Asylum, RE: Amp For Mids Only (0.00)
Posted by 91derlust on 2021-01-03, 03:58:12 (124.187.84.181)
All-DHT with low noise DC on the filaments, low ripple B+, and maybe transformer input. A single stage amp using EML 20B (or maybe even the 20A) tubes would be tempting in this role: quiet, very low d .......

112: General Asylum, I'm a bit late to the party... (0.00)
Posted by 91derlust on 2021-01-02, 18:10:55 (124.187.84.181)
Great post and thread. The past few years I'd fallen into a bit of rut, listening to a lot new indie stuff, mostly as filler, and the usual minimal composition/ ambient-ish artists. For the later part .......

113: Tube DIY Asylum, RE: That's a reasonable solution... (0.00)
Posted by 91derlust on 2020-12-28, 14:07:24 (124.187.84.181)
I'm pretty confident this can be achieved a good series feed transformer. The series feed 4K2 output transformer in my 2A3 daily drive delivers roughly 45H. Sounds transparent, extended and coherent t .......

114: Tube DIY Asylum, RE: what is reality ... (0.00)
Posted by 91derlust on 2020-12-26, 02:12:59 (124.187.84.181)
It is interesting the stories people tell themselves to protect and strengthen their beliefs. .......

115: Tube DIY Asylum, But that is not why he was banned. (0.00)
Posted by 91derlust on 2020-12-23, 11:48:12 (124.187.84.181)
Can't be letting reality get in the way of our beliefs. That applies to all of us. .......

116: High Efficiency Speaker Asylum, Got it, thanks. nt. (0.00)
Posted by 91derlust on 2020-12-21, 11:09:47 (124.187.84.181)
. .......

117: High Efficiency Speaker Asylum, What is it about the JA8008-HMQ you would like to improve? nt. (0.00)
Posted by 91derlust on 2020-12-14, 19:48:16 (165.86.81.72)
. .......

118: Tubes Asylum, RE: Tube/Valve Lifespan (0.00)
Posted by 91derlust on 2020-12-12, 17:13:30 (124.187.84.181)
Depends on the tubes and the amp. I design circuits that take are of the tubes and I expect over a decade of life. No sudden failure; no premature aging. I do have back-ups ready to go and don't think .......

119: Tube DIY Asylum, RE: Basic Drive Voltage Question (0.00)
Posted by 91derlust on 2020-12-10, 12:00:37 (124.187.84.181)
Is the CD player capable of 2V RMS? Tube grid voltages are better understood in terms of peak voltage. Multiply the 2V RMS by 1.4 to get the peak voltage. Your drive voltage will be almost 20V. Just t .......

120: Tube DIY Asylum, RE: Power supply interaction article (0.00)
Posted by 91derlust on 2020-12-01, 10:57:57 (121.214.224.26)
Bookmarked. Will attempt digestion this weekend! .......

121: Tube DIY Asylum, RE: Your preamp power supply will be Class-A DC with a constant current draw (0.00)
Posted by 91derlust on 2020-11-30, 16:19:40 (121.214.224.26)
Me too. And what that means in a single-ended amplifier stage can be contentious! They are class A and draw a constant current: it is ripple (and noise) that matters! They draw consistent average curr .......

122: High Efficiency Speaker Asylum, RE: Curious about what speaker characteristics (0.00)
Posted by 91derlust on 2020-11-23, 21:27:32 (121.214.224.26)
My simple take is that amplifiers and speakers form a system: factor the amplifier output impedance into the design of the speaker. SET (in combination with a speaker) bass need not be "mushy" as some .......

123: High Efficiency Speaker Asylum, RE: "superior/seamless midrange" (0.00)
Posted by 91derlust on 2020-11-22, 00:41:08 (121.214.224.26)
Why do you say that must be due to H2 distortion? Why not the lack of crossover distortion or near-absence of higher-order harmonics? I suspect confirmation and loss aversion biases are at play in the .......

124: SET Asylum, Thanks for the info! nt. (0.00)
Posted by 91derlust on 2020-11-19, 02:59:28 (121.214.224.26)
. .......

125: Tube DIY Asylum, RE: Power transformer question (0.00)
Posted by 91derlust on 2020-11-12, 14:51:06 (165.86.81.71)
Sometimes, but not always. Commonly used star grounding does not. Multiple star grounding need not, but can be. A buss need not either, but often is. Using a multiple star grounding scheme, I connecte .......

126: Tube DIY Asylum, RE: Power transformer question (0.00)
Posted by 91derlust on 2020-11-11, 01:56:37 (121.214.224.26)
The safety earth should be grounded to the chassis with own secure connection - it shall not be shared or otherwise compromised. The 0V signal ground/s should be connected to a single location - prefe .......

127: SET Asylum, RE: Last night I measured My lowest Hum level ... (0.00)
Posted by 91derlust on 2020-11-08, 12:03:15 (121.214.224.26)
That is some nice low hum for AC filaments on DHTs, 3 stages no less! Curious to know how you achieved that Willie. Cheers. .......

128: Tube DIY Asylum, RE: What makes a high quality plate choke? .... Better yet .... (0.00)
Posted by 91derlust on 2020-10-18, 18:11:44 (165.86.71.72)
"The double whammy in all of this is as lovers of tubes we also face engineering backlash from the mainstream audio world. Move that to Single ended Triodes and toss in analog you become a running jok .......

129: Tube DIY Asylum, RE: What makes a high quality plate choke? .... Better yet .... (0.00)
Posted by 91derlust on 2020-10-16, 18:18:30 (124.187.69.45)
Thanks for the thoughtful and nicely written response Dave. Much appreciated. I'm still open to the possibility that the "special sauce" of different houses can complement - or could be better suited .......

130: Tube DIY Asylum, RE: What makes a high quality plate choke? .... Better yet .... (0.00)
Posted by 91derlust on 2020-10-15, 02:59:57 (101.179.13.227)
Hi Dave. Please bear with me. What follows is a bit of a brain dump... I'm looking at this from the perspective of a pragmatic potential customer that is not an engineer or transformer winder but does .......

131: Tube DIY Asylum, RE: Thanks all - but still wondering about potential effect of core materials (0.00)
Posted by 91derlust on 2020-10-07, 12:35:00 (101.177.141.120)
Not really my area Deke... I do think core materials matter for plate chokes, FWIW. Quality nanocrystal would be my first choice, followed by one of the really Hi-B types. This based on Dave's comment .......

132: Tube DIY Asylum, RE: He was asking about parafeed output transformer arrangement (0.00)
Posted by 91derlust on 2020-10-06, 21:09:39 (165.86.81.71)
Or the cathode bypass cap (well, you can, but it is a bit more challenging in directly-coupled maps). Then there are the stacked voltages of such an amp: the EML 30A is a high-voltage input tube and t .......

133: SET Asylum, RE: No, but I have heard more than one of them... (0.00)
Posted by 91derlust on 2020-10-04, 21:49:19 (101.177.141.120)
A little clarification. The "Ultrapath" element of the DRD design changes the current path and apparently removes some of the PS and cathode bypass capacitor flavour. The ultrapath capacitor is import .......

134: Tube DIY Asylum, RE: I found "Transfer Efficiency" (0.00)
Posted by 91derlust on 2020-10-03, 18:35:53 (101.177.141.120)
DT667, either you are either so highly impressionable that you've adopted JM's reasoning and online persona, or JM is posting under the DT667 moniker. .......

135: Tube DIY Asylum, RE: Correct - this has nothing to do with running tubes above/below their voltage. (0.00)
Posted by 91derlust on 2020-10-03, 03:38:19 (101.177.141.120)
Yeah, With a quick read it just seemed at times a bit confusing below and was just trying to clarify. On reading again probably not needed, but may not hurt. Cheers. .......

136: Tube DIY Asylum, RE: OMFG (0.00)
Posted by 91derlust on 2020-10-02, 18:08:37 (101.177.141.120)
Their claims were addressed in the various threads at the time and are available. Perhaps that may be your goal... take a look at the original post and what follows and ask yourself, honestly, whether .......

137: Tube DIY Asylum, RE: allow the customer to determine fair value for services ... (0.00)
Posted by 91derlust on 2020-10-02, 15:10:49 (101.177.141.120)
If your vision of capitalism is how you would like to live your life, well, that's your choice. Sounds like a confidence man's justification for ripping off rubes. Your comments and recent development .......

138: Tube DIY Asylum, RE: operation point 330b xls (0.00)
Posted by 91derlust on 2020-10-02, 14:31:03 (101.177.141.120)
I aim to keep distortion and output impedance reasonably low (for a SET amp), which excludes many of the operating points provided on the EML site. I do like to see a broad range of operating points a .......

139: Tube DIY Asylum, RE: Does low or high heater voltage affect sound? (0.00)
Posted by 91derlust on 2020-10-02, 14:17:40 (101.177.141.120)
I don't think Andy is asking about running a given tube with high or low voltage. He is asking whether similar tubes, where the main difference is filament voltage, sound different: do different filam .......

140: Tube DIY Asylum, RE: operation point 330b xls (0.00)
Posted by 91derlust on 2020-09-29, 03:10:49 (58.161.17.250)
"but in general the best way to design is to use the loadlines, use commonsense (some designing skills) " That's what I do. Generally I don't have an issue with the points Jac provides, even if I don' .......

141: SET Asylum, RE: Cables always attach on top! (0.00)
Posted by 91derlust on 2020-09-27, 03:58:19 (58.161.17.250)
I didn't think the Speakons were available with sufficient voltage ratings for B+. I will take another look... certainly cheaper than the Lemos I've been considering! Cheers. .......

142: SET Asylum, RE: Anyone building or just got an S.E.T. amp ?? (0.00)
Posted by 91derlust on 2020-09-27, 03:53:48 (58.161.17.250)
Thanks for the kind words Willie. Same here - I miss your adventures! How come you have decided to slow down. I will get the next two amps built... probably in multiple chassis to be kind to my back. .......

143: Tubes Asylum, Have made contact with Jac. (0.00)
Posted by 91derlust on 2020-09-26, 13:45:19 (58.161.17.250)
He is apparently snowed amid COVID craziness in Europe. I'd wish his post-order follow-up was better: it might save him some time and his customers some uncertainty. .......

144: SET Asylum, RE: Anyone building or just got an S.E.T. amp ?? (0.00)
Posted by 91derlust on 2020-09-25, 15:50:04 (58.161.17.250)
I have designed my next amp and am accumulating parts; I'd be more progressed if not for delays in tube and transformer supply. This amp will be an EML 12B-drives-PX4, running quality Finemet input, i .......

145: Tube DIY Asylum, RE: I found "Transfer Efficiency" (0.00)
Posted by 91derlust on 2020-09-25, 03:38:45 (58.161.17.250)
I'd forgotten about Dennis and Jeff. What is that like for you, still thinking of them after years have elapsed? .......

146: Tubes Asylum, Agreed re frustration and value! (0.00)
Posted by 91derlust on 2020-09-24, 02:51:53 (58.161.17.250)
Where else can I get new medium mu DHT driver tubes? Real mesh plates? The product is really good but the order follow-up not so much. .......

147: Tube DIY Asylum, RE: operation point 330b xls (0.00)
Posted by 91derlust on 2020-09-23, 02:40:50 (58.161.17.250)
Jac's page (linked) provides a range of "recommended" operating points, including the H2 distortion associated with those points. My opinion: " Example single ended operating points" would be more apt .......

148: Tubes Asylum, RE: He has a huge stock...... (0.00)
Posted by 91derlust on 2020-09-16, 02:09:23 (58.161.17.250)
True that Andy. I just hope Jac is okay. Take care. .......

149: Tubes Asylum, Anyone heard from Jac in the last few weeks? (0.00)
Posted by 91derlust on 2020-09-16, 01:35:11 (58.161.17.250)
Normally Jac (Jac Music and EML) is quick to respond via email and very helpful. I've tried contacting him a few times in the last three weeks and have not received a response and it looks like the EM .......

150: Tubes Asylum, RE: EML 2A3 solid plate? (0.00)
Posted by 91derlust on 2020-09-16, 01:29:08 (58.161.17.250)
I've had both in my overbuilt 6C6 direct-couple beasty. I didn't have a preference in a general sense: both are nice and coherent in the EML way, but different. I find the solids to be an all-round hi .......

151: SET Asylum, RE: Yeah... (0.00)
Posted by 91derlust on 2020-09-07, 03:02:01 (58.161.17.250)
I reckon they're worth looking into. Sure, you'll get high frequency roll-off... some folks think that is not so bad. Suck it and see. .......

152: General Asylum, RE: Never be in a Hurry ...................... (0.00)
Posted by 91derlust on 2020-09-07, 01:30:25 (58.161.17.250)
So true. As soon as I put time constraints/expectations on my builds the enjoyment evaporates. .......

153: General Asylum, RE: I hate Freakin' DIY Stereo! (0.00)
Posted by 91derlust on 2020-09-06, 14:08:36 (58.161.17.250)
Sure is. I have found other ways in other areas of my life, but DiY... .......

154: General Asylum, RE: I hate Freakin' DIY Stereo! (0.00)
Posted by 91derlust on 2020-09-05, 16:42:49 (58.161.17.250)
I (try to) pace myself... and only design and build what I want to. Still, my unconscious goal to maximally achieve competing design objectives can leave me frustrated and ruin my enjoyment and the ul .......

155: Tube DIY Asylum, RE: New project, voltage checks good, blows fuse after 45 minutes and power transformer hellaciously hot and odd smell (0.00)
Posted by 91derlust on 2020-09-01, 02:09:26 (58.161.17.250)
That is my take too. By de-rating the transformer you are more likely to have long life, reliability, and quiet operation. And it does not add greatly to the cost, generally. Take care. .......

156: Tube DIY Asylum, RE: New project, voltage checks good, blows fuse after 45 minutes and power transformer hellaciously hot and odd smell (0.00)
Posted by 91derlust on 2020-08-31, 13:01:12 (58.161.17.250)
Thanks for the clarification Paul. And for the extra information - interesting and helpful know. Take care. .......

157: Tube DIY Asylum, RE: New project, voltage checks good, blows fuse after 45 minutes and power transformer hellaciously hot and odd smell (0.00)
Posted by 91derlust on 2020-08-30, 17:48:28 (165.86.81.72)
Thanks Paul. So, a transformer rated for 58mA RMS for the whole winding would handle 82mA configured as FWCT? And PSUDII does not calc the RMS Iac accurately for FWCT? My advice: de-rate power transfo .......

158: Tube DIY Asylum, RE: New project, voltage checks good, blows fuse after 45 minutes and power transformer hellaciously hot and odd smell (0.00)
Posted by 91derlust on 2020-08-30, 15:04:19 (58.161.17.250)
A 58mA RMS rated secondary seems low for 50mA DC, CT, C-input tube rectified power supply. For 50mA DC draw I'd expect to see 70mA RMS, or greater. The JE Labs design quoted would likely have 65-70mA .......

159: Tube DIY Asylum, RE: Steve Bench dht ac filament hum reduction circuit (0.00)
Posted by 91derlust on 2020-08-27, 04:16:57 (58.161.17.250)
I've bookmarked the link and will read when work settles down a little. Thanks. .......

160: Tube DIY Asylum, RE: Steve Bench dht ac filament hum reduction circuit (0.00)
Posted by 91derlust on 2020-08-27, 04:14:09 (58.161.17.250)
Where we place the burden of truth or fact affects how we make our decisions. Some folks are willing to do stuff until the evidence clearly exists that it should not be done. Others won't do stuff unt .......

161: Tube DIY Asylum, RE: Steve Bench dht ac filament hum reduction circuit (0.00)
Posted by 91derlust on 2020-08-26, 00:03:13 (49.197.26.3)
Ah hominem attacks and our past decisions aside, there is a theoretical basis for DHT life expectancy being sensitive to filament voltage variation. If the Coleman regs, as a CCS, don't provide consis .......

162: High Efficiency Speaker Asylum, RE: Which are the most efficient speakers? (0.00)
Posted by 91derlust on 2020-08-21, 15:25:31 (58.161.17.250)
The extremes tend to enforce diminishing returns. Good-sounding tube amps that are quiet enough, and sound good, are probably rare and expensive... depending on how one defines "quiet enough" and "sou .......

163: Tube DIY Asylum, Not waste: learning. Glad you got it sorted! nt. (0.00)
Posted by 91derlust on 2020-08-19, 00:39:39 (58.161.17.250)
. .......

164: Tube DIY Asylum, Weird for sure. nt (0.00)
Posted by 91derlust on 2020-08-17, 14:11:50 (58.161.17.250)
. .......

165: Tube DIY Asylum, RE: Pop quiz. ASL 1006 SET mono 845 amp, what's missing? (0.00)
Posted by 91derlust on 2020-08-17, 14:09:38 (58.161.17.250)
Some consider it good practice to twist wires (and keep them short) between the rectifier and first PS capacitor; the "DC" can have a lot of ripple at that point. .......

166: Tube DIY Asylum, Nice find. (0.00)
Posted by 91derlust on 2020-08-13, 22:46:41 (58.161.17.250)
Let us know the amps sound with those in there. .......

167: Tube DIY Asylum, RE: Got a cathode resistor dropping 70V on a 300B... (0.00)
Posted by 91derlust on 2020-08-13, 02:14:05 (58.161.17.250)
I like to derate by half for long life and some headroom, so I vote for 160V. Is this for your Billies? They deserve a film In there, IMHO. .......

168: Tube DIY Asylum, RE: Stephie Bench LT spice reactive loadlines. (0.00)
Posted by 91derlust on 2020-08-07, 14:43:22 (58.161.17.250)
Thanks. I will give it a go while I wait for parts to arrive for my next build. .......

169: Tube DIY Asylum, RE: Stephie Bench LT spice reactive loadlines. (0.00)
Posted by 91derlust on 2020-08-06, 22:09:02 (165.86.71.71)
Looks great. All I need now is to become a LTspicer. Seems like a steep learning curve (pun unintended). .......

170: Digital Drive, RE: Here's a story.... (0.00)
Posted by 91derlust on 2020-08-06, 04:33:48 (58.161.17.250)
IME, Roon does not sound as good to me as some of the alternatives running on the same server. I've been running Roon several years and recently changed to LMS: Surprisingly noticeable difference in m .......

171: Tube DIY Asylum, RE: New Toy (0.00)
Posted by 91derlust on 2020-07-27, 15:09:04 (58.161.17.250)
Yep. Been following his nice work. He's willing to help others too. .......

172: Tube DIY Asylum, RE: Sorry Folks (0.00)
Posted by 91derlust on 2020-07-10, 12:58:37 (58.161.17.250)
You've nothing to apologise for Mike. And I agree with what you and Dave are saying. Similar approach when I build amps. Take care. .......

173: Tube DIY Asylum, RE: Question about OPTs for SET - Conclusion (0.00)
Posted by 91derlust on 2020-07-09, 21:52:02 (165.86.81.71)
I think what you have is a very nice transformer and it might be a bit costly to significantly "better". Relax. Listen. Enjoy. Apologies if my (not loaded!) "why nickel?" question threw things off tra .......

174: Tube DIY Asylum, RE: Why nickel? (0.00)
Posted by 91derlust on 2020-07-06, 22:41:44 (58.161.17.250)
On this point: "I often wonder how much building endless headroom into a design @ 20Hz pushes the low level info down into the depths of what a core can resolve." Quality nanocrystalline cores are app .......

175: Tube DIY Asylum, RE: Why nickel? (0.00)
Posted by 91derlust on 2020-07-06, 13:37:47 (58.161.17.250)
And the significance understood in relation to ourselves, not just others. Constant awareness... Take care. .......

176: Tube DIY Asylum, RE: Why nickel? (0.00)
Posted by 91derlust on 2020-07-05, 18:33:49 (165.86.71.72)
I very much agree with this Dave. Although understanding the challenges and their solutions are in the engineering realm, the desired outcomes and design choices are very much down to personal decisio .......

177: Tube DIY Asylum, RE: Lundahl (0.00)
Posted by 91derlust on 2020-07-04, 23:38:53 (58.161.17.250)
Thanks vinnie - I will try to track it down. Einstein could be insightful, yet no one can have all the understanding about anything let alone many things. ;) .......

178: Tube DIY Asylum, RE: Why nickel? (0.00)
Posted by 91derlust on 2020-07-04, 13:48:39 (58.161.17.250)
Thanks Dave. I'm sorry things are a bit tetchy below. I suspect some folks find absolute statements like "...king of everything..." a bit much to swallow in the realm of personal preferences. And whil .......

179: Tube DIY Asylum, RE: Lundahl (0.00)
Posted by 91derlust on 2020-07-04, 01:39:37 (58.161.17.250)
Good to know - thanks for sharing personal experience. I think for the most part the Lundahls are solid transformers. One just needs to take care. .......

180: Tube DIY Asylum, RE: Why nickel? (0.00)
Posted by 91derlust on 2020-07-04, 01:21:45 (58.161.17.250)
Thanks Paul. But why nickel over the currently available alternatives? Finemet, at least for gapped transformers, seems a technically better material in the hands of a competent engineer. In practice, .......

181: Tube DIY Asylum, Why nickel? (0.00)
Posted by 91derlust on 2020-07-03, 14:32:17 (58.161.17.250)
. .......

182: Tube DIY Asylum, RE: Question about OPTs for SET - Conclusion (0.00)
Posted by 91derlust on 2020-07-03, 04:18:58 (58.161.17.250)
Hey Mike. I reckon that's a good plan, especially if you like what you hear. I'd go custom - it may not be as expensive as you think... maybe the same cost as the Hashi for a purpose-designed item. I' .......

183: Tube DIY Asylum, RE: Question about OPTs for SET (0.00)
Posted by 91derlust on 2020-07-01, 18:55:48 (165.86.71.72)
I apply my minimum 25Hy for each 1k of plate resistance rule of thumb (though I'm more comfortable with 35Hy or more for co$tly transformers)... it requires a rough understanding of the tube's rp at a .......

184: Tube DIY Asylum, Great outcome. I'm enjoying your adventures. Nt (0.00)
Posted by 91derlust on 2020-07-01, 02:19:54 (58.161.17.250)
. .......

185: Tube DIY Asylum, RE: share cad files? (0.00)
Posted by 91derlust on 2020-06-30, 13:01:24 (58.161.17.250)
Nothing to share yet. Give me a month or two and I will something. I've been using QCAD: not too expensive and has a nice step-by-step tutorial. Limited to 2D, which should be fine for what we do. No .......

186: Tube DIY Asylum, RE: cnc chassis ? (0.00)
Posted by 91derlust on 2020-06-28, 15:36:56 (58.161.14.165)
These were carefully hand-drawn on graph paper and discussed with the fabrication shop. Inside, there are acetal sub-chassis (CNCed by a sign shop) aligned with mounting holes in the chassis - no issu .......

187: Tube DIY Asylum, RE: cnc chassis ? (0.00)
Posted by 91derlust on 2020-06-28, 04:19:58 (58.161.14.165)
That's what I do. Laser for steel and stainless steel chassis; router for acetal subchassis. Invest the time to plan the design well. The chassis, especially if simply a top plate, should be relativel .......

188: Speaker Asylum, RE: Truly agree (0.00)
Posted by 91derlust on 2020-06-27, 19:47:26 (58.161.14.165)
The Bisons are nice. Not perfect, but nice. Well designed for their purpose. They've lasted in the system a while which is a good sign - I don't enjoy turning over stuff constantly. I am considering a .......

189: Speaker Asylum, RE: So what's your favorite current production 2A3? (0.00)
Posted by 91derlust on 2020-06-27, 16:46:23 (58.161.14.165)
The JJ 2A340 is pretty nice: solid, dynamic, big and still direct; relative to the mids, bass can sound a bit soft and treble slightly (not offensively - some will like this) crisp - not zingy like so .......

190: Speaker Asylum, RE: Truly (0.00)
Posted by 91derlust on 2020-06-27, 16:30:02 (58.161.14.165)
That 2226 doesn't look like a great match for SET: 4" vc, lowish Qms (mechanical losses likely a bit high), Qes not as low as I'd like... on paper looks like it would need some juice to come alive. Sh .......

191: Tube DIY Asylum, RE: EML 20AM/B (0.00)
Posted by 91derlust on 2020-06-06, 14:10:04 (58.161.14.165)
Totally understood and a good decision. I've had the same concerns about the EML20B for my next build. I'd like to try transformer coupling: the combo of 25+mA and 4K-5K ra can be a touch challenging .......

192: SET Asylum, Thanks Paul. I've learned a lot from your posts. Nt. (0.00)
Posted by 91derlust on 2020-06-03, 03:00:27 (58.161.14.165)
. .......

193: SET Asylum, RE: 300/76/6sn7 Hogan amp - Repaired? Cap questions (0.00)
Posted by 91derlust on 2020-06-02, 13:25:30 (58.161.14.165)
Will it affect the output impedance of the supply? Could that affect sound quality? I suspect the PSU in the Hogan amp was not "engineered" so maybe it doesn't matter. 47uF does seem a bit low value .......

194: Tube DIY Asylum, That is really, really impressive. nt. (0.00)
Posted by 91derlust on 2020-06-02, 01:54:36 (58.161.14.165)
. .......

195: Tube DIY Asylum, Cost is only one part of the value equation. (0.00)
Posted by 91derlust on 2020-05-30, 00:57:42 (58.161.14.165)
My, and perhaps others', priorities/objectives might be different to yours. I'm cool with that. .......

196: Tube DIY Asylum, RE: FET + DHT? (0.00)
Posted by 91derlust on 2020-05-28, 13:28:55 (58.161.12.27)
Or use a quality step-up 1:2 in front of the DHT, something better than Lundahl, Electraprint et. al. .......

197: Tube DIY Asylum, EML 20AM/B (0.00)
Posted by 91derlust on 2020-05-28, 13:25:14 (58.161.12.27)
Pricey, but should last forever and can reproduce music nicely indeed. .......

198: General Asylum, RE: Don't forget aluminum (0.00)
Posted by 91derlust on 2020-04-17, 16:09:31 (120.147.85.99)
I have had my custom Indy Fab steel frame for close to a decade and can't imagine parting with it, even if I don't ride as much these days. Next bike will probably be a standard steel commuter - more .......

199: High Efficiency Speaker Asylum, RE: Art Dudley at Stereophile has died. (0.00)
Posted by 91derlust on 2020-04-15, 02:43:04 (120.147.77.80)
Art was one of the very few audio writers I could enjoy reading. Audio has lost an important person. Saddening news. Peace. .......

200: Tube DIY Asylum, I hear ya Dave... and the Mean Wells are supposed to good. Nt. (0.00)
Posted by 91derlust on 2020-04-10, 22:04:13 (120.147.77.80)
. .......

201: Tube DIY Asylum, RE: Need help selecting a 5.0volt D.C. module for 300B filament , (0.00)
Posted by 91derlust on 2020-04-10, 19:11:53 (120.147.77.80)
I've heard that too and seen them used in designs published on the Jac Music site (and Jac is very serious about his tubes being used safely). I have thought about using them, but have a mental barrie .......

202: Tube DIY Asylum, RE: Need help selecting a 5.0volt D.C. module for 300B filament , (0.00)
Posted by 91derlust on 2020-04-10, 19:06:41 (120.147.77.80)
TentLabs seems an option. Not cheap; apparently good. Unlike Coleman regs, EML warranty will not be voided, if that matters. .......

203: Tube DIY Asylum, RE: Potted power transformer, what material is that? (0.00)
Posted by 91derlust on 2020-04-04, 19:49:16 (120.147.77.80)
"Pitch" or tar apparently sounds best but seems a bit vulnerable to the dangers of transportation. Epoxy is often used due to its resilience. .......

204: SET Asylum, RE: This is not a matter of a long term loan... (0.00)
Posted by 91derlust on 2020-04-04, 18:36:34 (120.147.77.80)
Seems reasonable to suggest that could lead to some bias. .......

205: SET Asylum, RE: Long term loan of equipment is hardly a new... (0.00)
Posted by 91derlust on 2020-04-04, 14:13:48 (120.147.77.80)
Sure. Only point I'm making is the Viridian was referring to unconscious bias and perhaps not calling people liars etc. I'll leave the 300b audiophile discussions to others. .......

206: SET Asylum, RE: Papa get's his Audio Note gear for free... (0.00)
Posted by 91derlust on 2020-04-04, 13:30:03 (120.147.77.80)
He said Steve could not be objective in his opinion. I take that to mean there are stronger/greater unconscious biases involved than if he were not receiving "loaners". Seems reasonable. .......

207: SET Asylum, RE: New Audio Note (UK) 300B tube (0.00)
Posted by 91derlust on 2020-04-03, 02:04:43 (120.147.77.80)
Meh. Whatever floats your boat. It amazes me that peeps obsess stuff at the margins of a paradigm when their paradigms are, well, shite. Irrespective, you are worthy. .......

208: General Asylum, Birds attracted to their own call. nt. (0.00)
Posted by 91derlust on 2020-03-26, 02:20:58 (120.147.77.80)
. .......

209: High Efficiency Speaker Asylum, RE: Heresys and the other Heritage Klipsch are easy to drive... (0.00)
Posted by 91derlust on 2020-03-07, 05:04:43 (58.161.15.33)
Heresys are efficient, but impedance and phase angles all over the place, if memory serves (it often doesn't). .......

210: High Efficiency Speaker Asylum, RE: We two are lost in the wilderness (0.00)
Posted by 91derlust on 2020-03-04, 15:00:27 (165.86.71.71)
I'll take a reasonably easy-to-drive "99dB" of musical presentation I enjoy in preference to a tough(er) to drive 104dB. Different people, different goals and rationales. Simples. .......

211: Speaker Asylum, RE: Since passive xovers are so problematic (0.00)
Posted by 91derlust on 2020-02-29, 14:55:42 (58.161.15.33)
Back in the day when I was considering SET and OTL PP quite people who had tried both decided to stick with SET. I've not heard an OTL so can't say what I'd prefer. The "problem" with output transform .......

212: Tube DIY Asylum, RE: Signal wire (0.00)
Posted by 91derlust on 2020-02-28, 22:14:30 (58.161.15.33)
I use VH Audio 24awg OCC Cu in foamed PTFE. I don't advocate it and I'm not clear on its relative sonic qualities, if any, in this position. .......

213: Inmate Central, RE: And I thought only Audi or Mercedes AMG offered 'super wagons' ;-) (0.00)
Posted by 91derlust on 2020-02-24, 19:02:00 (165.86.71.71)
. .......

214: General Asylum, If I needed active gain... (0.00)
Posted by 91derlust on 2020-02-19, 01:02:59 (58.161.15.33)
and line only: directly-heated triodes done well. If I needed phono, some low noise (maybe not even tube?) initial gain stage followed by DHTs. Disclaimer: that is what I would choose now... given my .......

215: High Efficiency Speaker Asylum, Thanks for the info and clarification Jon. nt. (0.00)
Posted by 91derlust on 2020-02-15, 18:56:10 (58.161.15.33)
. .......

216: Tube DIY Asylum, RE: Tranny coupling versus cap coupling (0.00)
Posted by 91derlust on 2020-02-12, 17:27:19 (165.86.71.71)
I'd expect a quality winder to be able to wind a transformer that maintains decent bandwidth for the 26: the current requirements are modest and the Rp is high, but not crazy high. The end result coul .......

217: High Efficiency Speaker Asylum, RE: Interesting new video on the Cube Nenuphars (0.00)
Posted by 91derlust on 2020-02-11, 11:50:45 (58.161.15.33)
I've been following them for a while. They look like wide-range drivers done well. At circa 91dB/1m they are not really high efficiency, but maybe efficient enough to use with 4-ish Watts in a small-m .......

218: Tube DIY Asylum, Cheers, T-K. (0.00)
Posted by 91derlust on 2019-10-26, 22:17:28 (101.183.24.24)
I will post pictures. Currently, work is leaving me a bit drained but I will find the time to build! 91. .......

219: Tube DIY Asylum, Thanks T-K. (0.00)
Posted by 91derlust on 2019-10-26, 16:50:56 (101.183.24.24)
I will probably still try the interstage transformer approach. I'd expect some phase shift, but I've been curious how an amp with a good interstage couple amp might sound in my sytem. I won't know unt .......

220: Tube DIY Asylum, RE: I wouldn't bother with an IT in anything (0.00)
Posted by 91derlust on 2019-10-24, 03:30:15 (101.183.24.24)
What do you mean by easier? What do you prefer to transformer coupling? What transformers did you try? Is your conclusion based on listening and//or measuring? Some info would be helpful. Cheers, 91 : .......

221: Tube DIY Asylum, RE: I wouldn't bother with an IT in anything (0.00)
Posted by 91derlust on 2019-10-23, 03:08:33 (101.183.24.24)
What transformers did you test? Did you listen? Currently considering a build with interstage transformer... and a good interstage seems to cost as much or more than a a good output. Cheers, 91 ::: TO .......

222: Speaker Asylum, Read the description and reviews. (0.00)
Posted by 91derlust on 2019-10-19, 01:51:50 (101.183.24.24)
Will be as valid as anything you read here. .......

223: Tube DIY Asylum, RE: Houses are woman things (0.00)
Posted by 91derlust on 2019-10-10, 03:20:13 (101.183.24.24)
So glad we built a small footprint home with *enough* space. Plenty of space for my partner to garden and for me to build amps (though my space could be better designed). I'd like a larger living/audi .......

224: Tube DIY Asylum, RE: Five babies in parade (0.00)
Posted by 91derlust on 2019-10-10, 03:12:02 (101.183.24.24)
My long-term girlfriend/partner loves music as much as I do and encourages my enjoyment of it. So do my female friends. It is not a WF, GF or "wifey" that is the problem... it is the person. Why would .......

225: High Efficiency Speaker Asylum, I use 2.5 Watts with GPA 604 Duplexes (0.00)
Posted by 91derlust on 2019-08-19, 14:48:09 (101.183.1.109)
I've used used both 50W of very low impedance Metaxas SS power and 2.5W of quality SE 2A3 power into my GPA 604 loaded into circa 300L MLTLs. The Metaxas provides vice-like grip for a dynamic, taut, s .......

226: Tube DIY Asylum, RE: PIO filter/psu (oil-can ?) caps. Are there any without PCBs inside? (0.00)
Posted by 91derlust on 2019-08-14, 18:09:50 (101.183.1.109)
Are you seeking real PIO or would you accept metallised film in oil (motor run)? PIO will be difficult to find in large enough uF for PS use (unless you are intending to use them as C-bypass, not as m .......

227: Critic's Corner, Meh +1 (0.00)
Posted by 91derlust on 2019-08-11, 18:04:55 (101.183.1.109)
I do like that he is trying to broaden the appeal and diversity of music and systems. This piece seems self-righteous and largely about his ego. Maybe he could spend more time empowering viewers how .......

228: SET Asylum, RE: Well, the non interest is consistant, DOA (nt) (0.00)
Posted by 91derlust on 2019-08-05, 16:02:25 (101.183.1.109)
I think the concept rather different to what most folks on this forum are used to and it will take some time to digest, learn and get comfortable enough with to take a leap of faith and build it. It m .......

229: SET Asylum, Agree with so much of this post. nt. (0.00)
Posted by 91derlust on 2019-08-05, 15:52:16 (101.183.1.109)
. .......

230: SET Asylum, RE: "which is futile I agree, even with an army of firefighters. " (0.00)
Posted by 91derlust on 2019-08-05, 15:51:27 (101.183.1.109)
It bothers you because it violates some of your beliefs and expectations - this applies to us all. It bothers me to, even though my beliefs and expectations are different to yours. If engineering is i .......

231: Tube DIY Asylum, RE: the same dogma from the same people, with a couple of exceptions (0.00)
Posted by 91derlust on 2019-07-27, 19:36:38 (101.183.1.109)
I don't agree - people have been running round in circles trying to help you, even when those threads don't devolve into the "pissing contests" you frequently refer to. Ironically, in looking at this .......

232: Tube DIY Asylum, RE: the same dogma from the same people, with a couple of exceptions (0.00)
Posted by 91derlust on 2019-07-27, 15:38:10 (101.183.1.109)
The differentiating factor is that you appear not to agree with the final sentence: "I do ask an occasional question if I end up stumped after researching as best I can." I suspect that is where much .......

233: Tube DIY Asylum, RE: the same dogma from the same people, with a couple of exceptions (0.00)
Posted by 91derlust on 2019-07-27, 04:59:57 (101.183.1.109)
I'm not in position to answer your question vinnie. There can be many interpretations of " do it yourself" and the guidelines and moderators are not clear on this. I can only tell you what my expectat .......

234: Tube DIY Asylum, RE: A modest proposal (with apologies to Jonathan Swift) (0.00)
Posted by 91derlust on 2019-07-27, 01:36:56 (101.183.1.109)
I have not posted or lurked here often lately. The devolution of community and paucity of collaboration are the main reasons. I think DrLowMu was the catalyst but not the sole player. The good Dr has .......

235: SET Asylum, RE: Thoughts on Decware en Anniversary? (0.00)
Posted by 91derlust on 2019-07-05, 15:15:27 (101.183.52.215)
Without seeing the schematic, my guess is they are used as shunts but the description is intentionally markety (or cryptic from a technical perspective). Reg tubes look pretty, if pretty-much unnecess .......

236: High Efficiency Speaker Asylum, RE: Small-ish high efficiency monitors? (0.00)
Posted by 91derlust on 2019-06-24, 13:22:10 (101.183.27.86)
Maybe these? .......

237: General Asylum, RE: Why stop at amps? (0.00)
Posted by 91derlust on 2019-06-15, 21:37:35 (101.183.27.86)
Even for the current high end, that strikes me as gaudy. JMO - we are in the weeds of subjectivity here. .......

238: Tube DIY Asylum, RE: Why Hovland capacitor fell of the favor ? (0.00)
Posted by 91derlust on 2019-05-31, 22:28:39 (101.183.74.58)
There were not as many boutique audio capacitor options when Hovland was popular. There have been plenty enter the game since and some folks will have moved on to them. From memory, not everyone loved .......

239: Tube DIY Asylum, RE: CuTF V-Cap...no more half stepping... add oil to THOSE. Siemens added oil to poly 30 years ago.~nT (0.00)
Posted by 91derlust on 2019-05-28, 19:23:06 (165.86.81.71)
CuTF is PTFE, not poly... I wonder if oil would help or hinder? Cheers, 91. .......

240: Tube DIY Asylum, RE: chokes ... on sale now (0.00)
Posted by 91derlust on 2019-05-28, 19:20:41 (165.86.71.71)
The 225Hy choke was looking good, until I read: "The maximum recommended audio output voltage is 25 volts rms. At higher voltages, distortion at low frequencies can occur." Would that be borderline in .......

241: Tube DIY Asylum, RE: Electraprint DRD 300B (0.00)
Posted by 91derlust on 2019-05-20, 16:35:35 (101.183.18.72)
Interesting. So the 5k transformer, when loading a low Rp tube, does not really need more inductance than a 3k load. Even though I have not gone though the calcs for a very long time, I associate the .......

242: Tube DIY Asylum, RE: Electraprint DRD 300B (0.00)
Posted by 91derlust on 2019-05-20, 16:23:15 (101.183.18.72)
Lower distortion? Better damping? Some folks seem to like a higher than typical load - it appears to affect the voicing of the amplifier. Cheers, 91 .......

243: High Efficiency Speaker Asylum, RE: Klipsch Cornwall mk3 special ed. (0.00)
Posted by 91derlust on 2019-05-08, 18:11:52 (165.86.81.71)
Is it as simple and broadly applicable as that? I reckon SETs - and hearing detail and dynamics at lower volumes, especially through upper bass and midrange - generally favour drivers with low mechani .......

244: General Asylum, RE: The Changing Face of Pop (0.00)
Posted by 91derlust on 2019-05-05, 02:59:33 (101.183.18.72)
I'm not sure of your point. There are plenty of musical artists of many ages making significant, progressive music. Why single out this - is it because it was in the mainstream press? Are you wanting .......

245: Amp/Preamp Asylum, Only true for IDH types. (0.00)
Posted by 91derlust on 2019-05-03, 20:44:41 (101.183.18.72)
DH types don not have slow warm up... Cheers, 91. .......

246: Amp/Preamp Asylum, RE: SS diodes tend to be noisy (0.00)
Posted by 91derlust on 2019-05-03, 20:40:01 (101.183.18.72)
Why the need for need "soft" recovery? Does that just mitigate the recovery spike? What if the recovery spike could be avoided altogether: SiC Schottky diodes? As for voltage drop, well, maybe. Mine P .......

247: SET Asylum, RE: Doing SET Backwards (0.00)
Posted by 91derlust on 2019-04-30, 21:58:09 (165.86.81.71)
I've considered using the 20B as single stage of amplification (except what might be in the source, a DAC). One active stage. No preamp. Cheers, 91. .......

248: SET Asylum, RE: Doing SET Backwards (0.00)
Posted by 91derlust on 2019-04-29, 20:35:00 (101.183.18.72)
My initial thoughts about that pre are that there some nice technical solutions to keep costs down and it would probably provide nice technical performance in a wide variety of systems... though gain .......

249: SET Asylum, RE: Doing SET Backwards (0.00)
Posted by 91derlust on 2019-04-29, 20:18:54 (101.183.18.72)
Sorry it has taken me a while to get back to this. It depends on what you are trying achieve: gain, voltage out, output impedance etc. For most situations, my tendency would be for a single tube: gene .......

250: SET Asylum, RE: 300B overbias / underbias questions (0.00)
Posted by 91derlust on 2019-04-28, 20:06:50 (165.86.71.71)
To clarify something I stated earlier in this sub-thread: It seems like the mA is distributed between both tubes (obvious, now that I think about it), so you can rest knowing the tubes are probably no .......

251: SET Asylum, RE: One bias pot and one measurement Jack (0.00)
Posted by 91derlust on 2019-04-28, 19:42:13 (165.86.71.71)
Not surprised. Also would not be surprised if they load the output tubes down to increase the power out. So yes, best to ask and not assume. Cheers, 91. .......

252: SET Asylum, Thanks again! (0.00)
Posted by 91derlust on 2019-04-27, 21:44:27 (101.183.18.72)
Yeah, being able to source a transformer with sufficient inductance, especially at 30-odd mA, was going to be the challenge. Under 15mA is much easier... I will take a look at the AN interstage. I sen .......

253: SET Asylum, That does sound nice... (0.00)
Posted by 91derlust on 2019-04-27, 21:22:03 (101.183.18.72)
...and encouraging. I have been hesitant re interstage transformer due to the 20AM/B current requirements and an Rp a bit higher than I'd like... the 50's Miller C is not that tough to drive so, with .......

254: SET Asylum, RE: 300B overbias / underbias questions (0.00)
Posted by 91derlust on 2019-04-27, 21:09:54 (101.183.18.72)
As C-B said, it depends on whether the current is per tube or for two tubes. If per tube, it is still high. If distributed across both tubes, probably okay. 11W is higher than most get from the 300B, .......

255: SET Asylum, RE: Doing SET Backwards (0.00)
Posted by 91derlust on 2019-04-27, 20:55:41 (101.183.18.72)
Thanks for the confirmation! I'd really like to use it... hopefully direct coupled, but the voltages do make me uncomfortable. And you are likely right: keeping it quiet will not be trivial! Isolated .......

256: SET Asylum, RE: 300B overbias / underbias questions (0.00)
Posted by 91derlust on 2019-04-27, 20:46:14 (101.183.18.72)
I was thinking that as well C- B, and then saw the 15W output and assumed per tube running massive current and low load. Still, you are right: better to ask than assume! Cheers, 91. .......

257: SET Asylum, RE: 300B overbias / underbias questions (0.00)
Posted by 91derlust on 2019-04-27, 14:44:03 (101.183.18.72)
If the currents you quote are correct, and the output power really is ~15W, the 300B tubes are being run at what I would call high dissipation. Running bias at 170mA means that the dissipation is bein .......

258: SET Asylum, RE: Don't go there (0.00)
Posted by 91derlust on 2019-04-27, 14:25:56 (101.183.18.72)
That is the challenge: getting enough plate voltage on the driver without needing a crazy-high B+. Kind of demands a output tube like the 45/2A3/PX4 or a 300B run at low plate voltage. If I needed mor .......

259: SET Asylum, RE: Doing SET Backwards (0.00)
Posted by 91derlust on 2019-04-27, 14:18:13 (101.183.18.72)
T-K does have immense knowledge and has helped me in the past. He means well - occasionally just has a particular axe to grind. Glad you got something out of the link - I liked the correlation with di .......

260: SET Asylum, RE: Doing SET Backwards (0.00)
Posted by 91derlust on 2019-04-27, 01:38:15 (101.183.18.72)
It's relative. When I think about the 6SN7, I think of a tube that is good for its type... but it is its type: a smallish IDHT. Best driver tube (debatable), for a small IDHT. Low distrotion, for a sm .......

261: SET Asylum, RE: Doing SET Backwards (0.00)
Posted by 91derlust on 2019-04-26, 20:18:55 (101.183.18.72)
This seems to be T-K's hot topic at the moment. Thing is, many of us don't prioritise full efficiency and/or power-handling at 20Hz, and we know it. Surprise, nor do many peeps who own more convention .......

262: SET Asylum, RE: Doing SET Backwards (0.00)
Posted by 91derlust on 2019-04-26, 15:40:51 (101.183.18.72)
I think there is a bit more too it than that. Certain types of distortion can lead to a euphonic (for some) sound and other types of distortion a harsh sound (for some). For other people, the same sou .......

263: Tube DIY Asylum, RE: J&K Audio Design: Best in class audio transformers +1 (0.00)
Posted by 91derlust on 2019-04-25, 23:48:32 (101.183.18.72)
I used their custom nanocrystalline double-C core output transformers and low DCR chokes (10 Ohm, 7Hy), Super Hi-B power transformers and various filament transformers. Pleased with the whole lot. Sou .......

264: Tube DIY Asylum, RE: I saw made in china on some specs. (0.00)
Posted by 91derlust on 2019-04-25, 23:41:00 (101.183.18.72)
Was not aware that some wee made in China. Can you point me to where you saw that? Certainly, my custom L3 and L4 transformers and chokes were wound in Malaysia. Cheers, 91 .......

265: SET Asylum, RE: "they tend to force a pretty high plate voltage onto your driver stage." ? (0.00)
Posted by 91derlust on 2019-02-22, 01:50:32 (101.183.18.72)
I'm seriously thinking of using a quality interstage in my next build... compared to the cost of some boutique caps, the interstage seems reasonable! To directly or transformer couple - that is the qu .......

266: SET Asylum, RE: 2A3 Direct Coupled VS. Capacitor coupled (0.00)
Posted by 91derlust on 2019-02-22, 01:20:37 (101.183.18.72)
Do the benefits of low impedance to ground apply equally under all drive conditions? Or is it more important under specific conditions, say, when driving the grid close to positive? Maybe it matters a .......

267: Tube DIY Asylum, RE: The Achilles heel of low power amplifiers (0.00)
Posted by 91derlust on 2019-02-20, 12:38:36 (101.183.18.72)
I very much get that Tre - I have had my fair share of exchanges with Dennis and the Dr. also. I have been there: under my current moniker and a previous... Although my technical competence well infer .......

268: Tube DIY Asylum, RE: The Achilles heel of low power amplifiers (0.00)
Posted by 91derlust on 2019-02-19, 22:58:06 (101.183.18.72)
Tre, this is getting a bit muddled up. I can see how my post could , at a hard stretch, be interpreted as you state. I will clarify, again - this time in more detail: I responded only to T-K's post, w .......

269: SET Asylum, RE: But there are other serious drawbacks to consider with Direct Coupling (0.00)
Posted by 91derlust on 2019-02-19, 15:20:07 (165.86.71.71)
I experienced one of these issues initially: destroyed an EML 2A3 mesh plate. Ouch. But really, not that big of a deal - just implemented a sequential turn on. Rock solid now with no issues at all. St .......

270: Tube DIY Asylum, RE: The Achilles heel of low power amplifiers (0.00)
Posted by 91derlust on 2019-02-19, 12:44:20 (101.183.18.72)
Just because I don't want to listen at loud levels or damage my hearing does not imply that that I think those that do are stupid... I never said that. Sure, my position is clear... Stupidity had noth .......

271: Tube DIY Asylum, RE: The Achilles heel of low power amplifiers (0.00)
Posted by 91derlust on 2019-02-19, 10:46:58 (101.183.18.72)
Why am I seen to support his position... why the conflation? I meant what I said. .......

272: Tube DIY Asylum, RE: The Achilles heel of low power amplifiers (0.00)
Posted by 91derlust on 2019-02-19, 03:04:23 (101.183.18.72)
Nope, just saying that for some listeners low power is not an Achilles heel... in fact, can be advantage in that music can sound rewarding when not cranked. Please show me where I referred to anything .......

273: Tube DIY Asylum, RE: The Achilles heel of low power amplifiers (0.00)
Posted by 91derlust on 2019-02-18, 23:57:48 (49.197.103.144)
Nothing wrong with it... nothing wrong with wanting to preserve hearing and/or enjoy music at home at more modest levels. A great thing about SETs and highish efficiency speakers is that I don't feel .......

274: Tube DIY Asylum, RE: reality check (0.00)
Posted by 91derlust on 2019-02-18, 23:49:50 (49.197.103.144)
His output transformer is several db down at 50hz. Cheers, 91 .......

275: Tube DIY Asylum, RE: 1W plus ... (0.00)
Posted by 91derlust on 2019-02-18, 23:46:22 (49.197.103.144)
I'm getting off topic... and thinking out loud, dangerously. I prefer an EML2A3 solid plate to the JJ: sounds more coherent and trasparent throughout it's range, but the JJ does have an enhaced sense .......

276: SET Asylum, RE: 2A3 Direct Coupled VS. Capacitor coupled (0.00)
Posted by 91derlust on 2019-02-16, 17:36:31 (101.183.18.72)
Responses that follow are based on my experience of building and running capacitor-coupled and direct-coupled amps using the same signal tubes (but other components are different). >>> Can somebody ex .......

277: SET Asylum, RE: 2A3 Direct Coupled VS. Capacitor coupled (0.00)
Posted by 91derlust on 2019-02-16, 16:36:28 (101.183.18.72)
>>> Another option is to use an interstage transformer. These cost a little more than cap coupling, but the bigger problem for me is that they tend to force a pretty high plate voltage onto your drive .......

278: SET Asylum, RE: PX25 tube....educate me. (0.00)
Posted by 91derlust on 2019-02-12, 02:02:30 (101.183.18.72)
Would it be better than any 2a3 amps? No, not nearly. The PX25 can be a nice tube, but I suspect That current manufacture are surpassed by the "better" current 2a3, imo. Does KR make a hp version of t .......

279: Tube DIY Asylum, RE: Ah ... excuse me .. these days .. (0.00)
Posted by 91derlust on 2019-02-09, 18:07:15 (101.183.18.72)
Thanks Willie - I reckon an all-DHSET is in my future. Something like an EML20 or 30 monkeyed to a 2a3/300B or 50... or maybe trans-couple with separate supplies for each stage. Just need some time: m .......

280: Tube DIY Asylum, RE: h ... excuse me .. (0.00)
Posted by 91derlust on 2019-02-09, 03:22:20 (101.183.18.72)
Just an observation. Not necessarily causal... could be coincidental. Maybe you had more to say when the good Dr was posting. Nothing more than that intended. I have always enjoyed your posts and am c .......

281: Tube DIY Asylum, RE: new breadboard system up and running.... (0.00)
Posted by 91derlust on 2019-02-07, 02:53:55 (101.183.18.72)
Drummerwill Does not post here often since a certain Dr tried to set up practice elsewhere. .......

282: Tube DIY Asylum, RE: Do you ever listen to equipment made by other DIYers? (0.00)
Posted by 91derlust on 2019-02-01, 14:26:03 (101.183.18.72)
I would, but there are not many tube DIYers here in a small, subtropical city. Not many places sell tube gear either - certainly not DHT-based amps. I think there is an audiophile club, but their inte .......

283: Speaker Asylum, RE: Best way to raise a subwoofer 5 feet off the ground? (0.00)
Posted by 91derlust on 2019-01-29, 17:24:20 (165.86.81.71)
I use a pair of electrical hand-driven forklifts. I leave the subwoofers on the forks and raise them for "critical" listening. I have a separate circuit to the listening room for charging them, but it .......

284: General Asylum, RE: The medium as the message (0.00)
Posted by 91derlust on 2019-01-27, 01:33:17 (101.183.18.72)
Dualistic categorisations are a simplification - it helps humans process/analyse/store and convince themselves they understand. I'm more concerned about my attachment to what I believe in and my expec .......

285: Tubes Asylum, RE: Depends on how sensitive the speakers are (0.00)
Posted by 91derlust on 2019-01-25, 21:44:51 (101.183.18.72)
The Kefs are little speakers running "weak" drivers with bass tuning designed for low impedance, voltage-source drive. Without knowing the design of the 845 amp (SE or PP; negative feedback?), could i .......

286: Tubes Asylum, RE: A simple, curious, ignorant amp question (0.00)
Posted by 91derlust on 2019-01-25, 21:33:43 (101.183.18.72)
I have not measured it, but I reckon loud for me is about 75dB average. Most modern pop records have a dynamic range between 2 and 10dB; genres not engaged in loudness wars 10 to 25dB, or more perhaps .......

287: Tubes Asylum, RE: in that case.........WOW !!! (0.00)
Posted by 91derlust on 2019-01-25, 21:23:36 (101.183.18.72)
Or they don't play their music so loudly as to become deaf. .......

288: Tube DIY Asylum, RE: Resistors (0.00)
Posted by 91derlust on 2019-01-01, 13:04:14 (101.183.22.20)
I can't tell you best. What I prefer/use is... Plate: Precision WW (Mills MR-200/Vishay MR100 etc). I've also used Kiwame 5W CF (KOA Speer CF if available in correct value) - I suspect these imbue a r .......

289: SET Asylum, RE: Input sensitivity (0.00)
Posted by 91derlust on 2018-12-13, 12:12:37 (101.183.22.20)
I have no issue driving the 2A3 with a directly-coupled 6C6 ("weak" pentode with circa 100x gain) - sounds nice indeed. Noise can be an issue due to high input impedance and high gain, especially as I .......

290: SET Asylum, RE: Input sensitivity (0.00)
Posted by 91derlust on 2018-12-12, 12:35:19 (165.86.71.71)
Great topic Steve! My main concern with high input sensitivity (high gain at the input/driver stage, usually) is that any current induced into the interconnect or input stage is converted to voltage ( .......

291: SET Asylum, RE: Audio Note Empress Silver Monoblocks (0.00)
Posted by 91derlust on 2018-12-12, 00:12:57 (101.183.22.20)
Yeah, I like 2A3s too - preferring certain modern types. But, my fave performance is not realised at (or near) standard operating points, maximum dissipation, or 1mA:4V plate ratios. Cheers, 91. ::: T .......

292: SET Asylum, RE: Audio Note Empress Silver Monoblocks (0.00)
Posted by 91derlust on 2018-12-12, 00:04:06 (101.183.22.20)
I both disagree and agree with you both. I reckon tube manufacturer plays a majority part in the sonics of modern tubes, perhaps moreso than the types themselves, especially 45/2A3/300B types. Pick gr .......

293: High Efficiency Speaker Asylum, Yarp. nt. (0.00)
Posted by 91derlust on 2018-12-06, 16:20:59 (165.86.71.71)
. .......

294: Tube DIY Asylum, RE: Heater Wiring? (0.00)
Posted by 91derlust on 2018-12-05, 22:16:58 (165.86.71.71)
No, don't bother - just leave as is. I'd think you'd have access to some decent winders that can do this stuff for you at a decent price... Edcor is well-regarded and quite inexpensive. I have mine (c .......

295: Tube DIY Asylum, RE: Heater Wiring? (0.00)
Posted by 91derlust on 2018-12-05, 03:10:46 (101.183.22.20)
Ah, just remembered you are using a Hammond with flying leads and can't tidily run two leads from that point. If memory serves, the leads of the Hammond are stranded, so less value in twisting them - .......

296: SET Asylum, RE: Can't recommend tubes for this (0.00)
Posted by 91derlust on 2018-12-04, 23:55:32 (101.183.22.20)
99% of all streaming may be mp3, but here in an Audio Asylum?.. I stream mp3 on the move, often exploring new music etc. At home, I stream CD-quality or better though Tidal (or play ripped CDs) via Ro .......

297: Tube DIY Asylum, RE: Heater Wiring? (0.00)
Posted by 91derlust on 2018-12-04, 18:12:26 (101.183.22.20)
Don't twist all three together. Not sure I am interpreting correctly... Why is one of the orange wires (for 2.5V) wired to the end of a yellow 5V wire? I'd just run it from the transformer secondary, .......

298: High Efficiency Speaker Asylum, RE: the ACA is good -- not SE 2A3 good, but good (0.00)
Posted by 91derlust on 2018-12-02, 02:24:27 (101.183.22.20)
I find there are more important factors to system performance than low versus even lower distortion. Hell, even the AES crew puts the audibility of distortion well above what most modern amps produce. .......

299: High Efficiency Speaker Asylum, RE: A new amp for the High Efficiency crowd (0.00)
Posted by 91derlust on 2018-12-01, 15:43:03 (101.183.22.20)
"SET amps aren't in the same zip code." In what sense - measured s/n and distortion? I think that's been done before (admittedly at higher cost), but I continue to prefer SET. Cheers, 91. .......

300: SET Asylum, Good point! (0.00)
Posted by 91derlust on 2018-11-22, 17:23:38 (101.183.15.206)
Contrast and compare: Transformers used in my 2W amp are custom wound and gapped specifically for my operating points and provide about 47Hy for a 4K2 primary; they are also well designed and built. T .......

301: SET Asylum, RE: Advise on SET + single driver setup (0.00)
Posted by 91derlust on 2018-11-22, 16:57:10 (101.183.15.206)
I run circa 2W in a smallish, but not tiny, room. When listening to tones, bass is clearly present at 25Hz and by 30Hz (maybe less) is fully in play. The bass keeps up with the rest of the music, is g .......

302: SET Asylum, RE: Advise on SET + single driver setup (0.00)
Posted by 91derlust on 2018-11-21, 17:46:06 (165.86.71.71)
" I would be a bit concerned about a flea power SET having the balls to drive the 15" woofer." Why? IME Watts are more about maximum volume than control. Cone size does not dictate SET unsuitability. .......

303: SET Asylum, RE: No one has said much about SET amplifier typology and circuits, so.... (0.00)
Posted by 91derlust on 2018-11-20, 17:17:55 (165.86.71.71)
I run a 6C6 direct-coupled to a 2A3 - not commercial. I really like it. One should take care: mine ate (expensive) tubes until I added switching to warm up filaments before applying B+. Nuff said. Str .......

304: SET Asylum, RE: i wish I take this route right from the beginning (0.00)
Posted by 91derlust on 2018-11-16, 14:30:31 (101.183.15.206)
Sounds like you are having fun! Keep it simple and enjoy the journey. Although my system is not complex, I often consider simplification.. but I enjoy it and can't bring myself to pull the trigger. Ma .......

305: SET Asylum, RE: i wish I take this route right from the beginning (0.00)
Posted by 91derlust on 2018-11-16, 14:17:25 (101.183.15.206)
Altec/GPA and Tannoy coaxials are a more complicated, (potentially) more costly journey and may not give you what you are looking for. I'd suggest you keep your focus on fullrange drivers (perhaps wit .......

306: SET Asylum, RE: Advise on SET + single driver setup (0.00)
Posted by 91derlust on 2018-11-16, 14:12:13 (101.183.15.206)
Some of the Decware stuff is indirectly-heated pentode, wired as triode. Such amps can sound really nice, but DHTs have a sound of their own. Yes, Omega now use their own drivers, which are reportedly .......

307: Tube DIY Asylum, Laser cut the whole chassis. nt. (0.00)
Posted by 91derlust on 2018-11-16, 12:29:01 (101.183.15.206)
. .......

308: SET Asylum, RE: Look at Mark Audio e.g. Alpair 10M (0.00)
Posted by 91derlust on 2018-11-16, 04:38:00 (101.183.15.206)
Low efficiency, low Qms (high loss), moderate Qes drivers would not be my ideal pairing with lowish power SET amps. JMHO, and opinions will differ... I'd be looking for higher Qms and efficiency for S .......

309: Tube DIY Asylum, RE: update... (0.00)
Posted by 91derlust on 2018-11-09, 11:37:00 (101.183.15.206)
Hey vinnie, I'm considering PP for my next build - to try something different - and your build here might give me an idea of whether I should bother. Curious to know what you think of the PP versus SE .......

310: Tube DIY Asylum, RE: need help with understanding a table (0.00)
Posted by 91derlust on 2018-11-04, 16:21:27 (165.86.81.71)
Regarding distortion and load, was there a thread here recently about using a slightly lower than textbook load when running zero-nfb PP? Something about the distortion characteristic being better (2n .......

311: Tube DIY Asylum, RE: 2a3/45 amp (0.00)
Posted by 91derlust on 2018-11-02, 19:46:20 (101.183.15.206)
Nice one vinnie: sounds like you are having fun and enjoying the fruits of your efforts. Yeah, 2A3 run more like a 45 can sound pretty nice... better than at the usual 60mA/250V operating point IME, F .......

312: Tube DIY Asylum, RE: If it's a small enclosure? (0.00)
Posted by 91derlust on 2018-10-15, 02:13:02 (101.183.15.206)
Regarding polyprop films: how much heat are talking about? May not be possible for the OP, but I'd be looking to keep temps well below 100degC. Should put a probe in my directly-coupled amp... Cheers, .......

313: Digital Drive, RE: Do they even stir make a NOS Dac? (0.00)
Posted by 91derlust on 2018-09-04, 03:15:58 (101.183.15.206)
I am considering Adagio, amongst others. Sonically, how do Adagio and Pavane differ? Cheers, 91 .......

314: SET Asylum, RE: That's how I make all of my important audio decisions! (0.00)
Posted by 91derlust on 2018-08-30, 19:30:11 (101.183.62.48)
Well, I don't make all my audio decisions like that, but these days with falling availability of places to hear or borrow stuff, and having a little knowledge as to what I think makes for a nice-sound .......

315: SET Asylum, RE: Wavac still among the best? (0.00)
Posted by 91derlust on 2018-08-30, 01:50:17 (101.183.62.48)
Dunno about the sound. The look pretty, in a way, but based on interior photos of one of the more expensive Wavacs, I would not buy them - nothing special. That said, I roll my own so perhaps not the .......

316: Tube DIY Asylum, RE: Anyone else having trouble accessing the forum at night? (0.00)
Posted by 91derlust on 2018-08-02, 22:34:16 (165.86.71.71)
I don't think it is so much the sight... more that the darkness after 9pm makes it difficult to see. My monitor is backlit so no problem here. Yeah, I'm a funny guy (not nearly). :^) .......

317: Tube DIY Asylum, RE: Cree SiC Diodes - Advice please (0.00)
Posted by 91derlust on 2018-07-22, 01:04:16 (101.183.62.48)
Great to know, thanks. I reckon I'll give the Cree SiC a shot. It's nice to know that if they don't work out for me other options exist. Cheers, 91. .......

318: Tube DIY Asylum, Got it. Thanks. Nt. (0.00)
Posted by 91derlust on 2018-07-21, 19:42:06 (101.183.62.48)
. .......

319: Tube DIY Asylum, Envy much! :^) nt. (0.00)
Posted by 91derlust on 2018-07-21, 18:50:05 (101.183.62.48)
. .......

320: Tube DIY Asylum, RE: Used Series 1200V Crees in my 833C amp (2.3kV B+) (0.00)
Posted by 91derlust on 2018-07-21, 18:42:14 (101.183.62.48)
Nice. Noise issues? A bridge is an option - in practice, halves the PIV requirement as I see it. Cheers, 91. .......

321: Tube DIY Asylum, RE: Cree SiC Diodes - Advice please (0.00)
Posted by 91derlust on 2018-07-21, 18:37:13 (101.183.62.48)
Thanks C-B for answering the rest of my questions. I was hoping to use the SiC for their zero reverse recovery spiking: they should be about as quiet as it gets. The xx4007 looks like a nice option: e .......

322: Tube DIY Asylum, RE: Cree SiC Diodes - Advice please (0.00)
Posted by 91derlust on 2018-07-21, 18:27:00 (101.183.62.48)
Eli, the noise is a concern for me; makes me nervous. You recommend sawing off the metal mounting tab (cathode) - is this the main thing to reduce noise pick-up? Do I still need to shorten the pins su .......

323: Tube DIY Asylum, RE: Cree SiC Diodes - Advice please (0.00)
Posted by 91derlust on 2018-07-21, 18:19:18 (101.183.62.48)
Thanks for the info Johno... certainly has given me info for further research and traps to be aware of. For 500 VDC B+, probably close to 400-0-400 VRMS. This roughly translates to a PIV too close to .......

324: Tube DIY Asylum, Cree SiC Diodes - Advice please (0.00)
Posted by 91derlust on 2018-07-20, 21:04:38 (101.183.62.48)
I'm a tube rectifier guy, but would like to take Eli's (and others') advice and use Cree SiC Schottky diode rectification in my next build. I'll be running capacitor-input filters, with a B+ not great .......

325: Tube DIY Asylum, RE: Weight (0.00)
Posted by 91derlust on 2018-07-17, 03:06:36 (101.183.62.48)
Well, I won't be going so far as you did! Nice work. I'm looking to keep weight below 15kg and would like a chassis that is easy to locate and move - not awkward. I'll try gyrators instead of iron for .......

326: Tube DIY Asylum, I LOVE that level of care, attention... investment. Kudos. nt. (0.00)
Posted by 91derlust on 2018-07-16, 00:50:25 (101.183.62.48)
. .......

327: Tube DIY Asylum, Next? (0.00)
Posted by 91derlust on 2018-07-16, 00:48:28 (101.183.62.48)
Maybe I'm getting soft in my old age: something not requiring adjustment, simple to build... and (relatively) light so as not to exacerbate my herniated disc! Thinking all-DHT monos; either SE or PP. .......

328: Tube DIY Asylum, RE:capacitors and wire ... (0.00)
Posted by 91derlust on 2018-06-28, 19:59:51 (165.86.71.71)
Thanks for the contribution Dennis; I'll wee what I can do in my next build. Cheers, 91. .......

329: Tube DIY Asylum, RE:capacitors and wire ... (0.00)
Posted by 91derlust on 2018-06-28, 19:57:46 (165.86.71.71)
Although my experience is limited, I agree. Cheers, 91. .......

330: Tube DIY Asylum, Thanks T-K. I'll just start and see what I can learn. nt. (0.00)
Posted by 91derlust on 2018-06-26, 15:32:54 (101.183.62.48)
. .......

331: Tube DIY Asylum, Oh, all TT tastiness! (0.00)
Posted by 91derlust on 2018-06-26, 15:31:55 (101.183.62.48)
That must sound pretty dang special. Kicking myself for failing to pick up some 841s back in the day when maybe Dave Davenport(?) was discussing them here. Don't even know if they are still available. .......

332: Tube DIY Asylum, Thanks again C-B. nt. (0.00)
Posted by 91derlust on 2018-06-26, 15:27:22 (101.183.62.48)
. .......

333: Tube DIY Asylum, RE: Surprisingly transparent sounding for a supposedly warm-sounding, low-gm pentode driver" (0.00)
Posted by 91derlust on 2018-06-26, 14:36:21 (101.183.62.48)
Actually CTS, your comments back in the day encouraged me to pursue my first 6C6 driven amp. I really like them. My next build will like be all DHT for something different, but I reckon the 6C6 will a .......

334: Tube DIY Asylum, Very interesting C-B (0.00)
Posted by 91derlust on 2018-06-26, 14:31:51 (101.183.62.48)
Makes sense the way you put it. I might try that on my other, RC-coupled, amp or next build. Is there a point at which this type of arrangement becomes infeasible? If I was driving a Type 50 (50mA and .......

335: Tube DIY Asylum, RE:capacitors and wire ... (0.00)
Posted by 91derlust on 2018-06-26, 14:19:39 (101.183.62.48)
No DC-links. Clarity TC with Kelvin connections for local PS decoupling; Auricap XO for 6C6 Cathode bypass; Russian alu foil PIO for 6C6 screen bypass; and ClarityCap CMR for 2A3 Cathode bypass. Maybe .......

336: Tube DIY Asylum, RE: Latest build: 6C6 direct-couple 2A3 (0.00)
Posted by 91derlust on 2018-06-25, 19:08:36 (101.183.62.48)
Thanks Dave - yeah, I think that's the best order for me to learn and understand. I'll probably in touch in the next couple of weeks... Cheers, 91. .......

337: Tube DIY Asylum, RE: Latest build: 6C6 direct-couple 2A3 (0.00)
Posted by 91derlust on 2018-06-25, 16:55:13 (101.183.62.48)
Attaching to the sub-chassis means I have fewer connections from the sub-chassis to chassis-mounted components - a bit easier to build. Can also change out caps without having to hack the chassis. All .......

338: Tube DIY Asylum, RE: Latest build: 6C6 direct-couple 2A3 (0.00)
Posted by 91derlust on 2018-06-25, 16:44:45 (101.183.62.48)
Thanks Tre. That's what I'm hoping to set up with TrueRTA. I'll also get a mic so I can measure what I am hearing at the listening seat. Cheers, 91. .......

339: Tube DIY Asylum, RE: Latest build: 6C6 direct-couple 2A3 (0.00)
Posted by 91derlust on 2018-06-25, 14:55:56 (101.183.62.48)
I don't think you are missing anything - I'd be surprised if there were not some measured roll-off. And yet, to me, the system does not sound obviously rolled off. Quite transparent actually, even int .......

340: Tube DIY Asylum, RE: Latest build: 6C6 direct-couple 2A3 (0.00)
Posted by 91derlust on 2018-06-25, 14:16:18 (101.183.62.48)
Thanks rage. I kinda chased stuff down the rabbit hole with this one, but once I'd started I could not stop. >20kg and only 2W per mono - that is a bit daft. Nice amps... but I reckon I'll do somethin .......

341: Tube DIY Asylum, RE: Latest build: 6C6 direct-couple 2A3 (0.00)
Posted by 91derlust on 2018-06-25, 14:06:56 (101.183.62.48)
Thanks for the kind words! This build sounds quite different to the RC-coupled version I also have. Output transformer is a custom L3 nanocrystalline C-core from J&K Audio Design. 2A3s are run at 250/ .......

342: Tube DIY Asylum, RE: Latest build: 6C6 direct-couple 2A3 (0.00)
Posted by 91derlust on 2018-06-25, 13:45:40 (101.183.62.48)
The plate load is 75K. No feedback. 6C6 operating points nominally as per the Radiotron SE2A3 schema archived on the JELabs blog. Test points and a Vishay foil pot are wired into the 6C6 cathode to ad .......

343: Tube DIY Asylum, RE: Yes! (0.00)
Posted by 91derlust on 2018-06-25, 13:34:13 (101.183.62.48)
Thanks guys! I wanted this to be reliable and also easy to work on. The output transformer and choke have long mounting screws, which would have made it tricky to mount the modules under, so just left .......

344: Tube DIY Asylum, Latest build: 6C6 direct-couple 2A3 (0.00)
Posted by 91derlust on 2018-06-24, 17:06:30 (101.183.62.48)
This is my experiment to see whether taking different approaches with the same tubes (6C6 and 2A3) could result in a different musical presentation. Took a bit of rework to ensure it did not immolate .......

345: Tube DIY Asylum, RE: Wow. (0.00)
Posted by 91derlust on 2018-06-21, 16:00:12 (101.183.62.48)
Bread boarding is fine for experimentation and learning. It has its place and I'll be using it in the future - no confusion here. Yes, if we are being literal, of course avoidable problems are avoidab .......

346: Tube DIY Asylum, RE: Wow. (0.00)
Posted by 91derlust on 2018-06-21, 14:53:00 (101.183.62.48)
Apologies for my previous post. Trolling? No. Pointed? Yeah, maybe a bit. I enjoy seeing well-implemented builds other than compromised breadboards, which comprise a large proportion of build posts re .......

347: Tube DIY Asylum, Wow. (0.00)
Posted by 91derlust on 2018-06-21, 01:10:26 (101.183.62.48)
Very nice looking pre T-K. Impressive work - your plannng and care are clearly evident. Kudos. More inspiring than the malfunctioning, time-sucking breadboards posted here ad nauseam. Cheers, 91 ::: T .......

348: Tube DIY Asylum, RE: update 4 (0.00)
Posted by 91derlust on 2018-06-12, 12:49:18 (101.183.62.48)
As drawn, the input stage and output stage grid leak are connected together, but are NOT referenced to ground. The PS is referenced to ground. Compare the drawing you first posted to the fdrawing you .......

349: General Asylum, RE: Impression on Devialet (0.00)
Posted by 91derlust on 2018-06-06, 05:06:26 (101.183.62.48)
If you' re into a low efficiency, smal footprint, high convenience paradigm, the system you sdescribe should satisfy, for now. I've found Devaliet-based systems to sound linear and non-offensive, but .......

350: Tube DIY Asylum, RE: Sigh... .......curious... (0.00)
Posted by 91derlust on 2018-06-05, 04:02:26 (101.183.62.48)
Something like that will be my next build, perhaps monkey style... after I get past my present direct-coupling woes. If I'm too jaded I'll transformer couple. Thanks btw c- b. Cheers. .......

351: General Asylum, I do, roughly 90% of the time. (0.00)
Posted by 91derlust on 2018-05-26, 03:05:22 (101.183.62.48)
And it is nice to have a large library at one's fingertips. Cheers, 91. .......

352: Tube DIY Asylum, RE: Small Challenge (0.00)
Posted by 91derlust on 2018-05-09, 04:18:00 (49.197.245.92)
Cool motivation. Cool end product. Awesome. Cheers, 91. .......

353: Tube DIY Asylum, That's my second favourite grounding article. (0.00)
Posted by 91derlust on 2018-05-07, 02:22:18 (101.183.99.79)
You could follow it and end up with a well-sorted circuit. Cheers, 91. .......

354: Tube DIY Asylum, RE: Preamp Preview (0.00)
Posted by 91derlust on 2018-04-20, 03:08:45 (101.183.182.152)
I'm using them as plate loads on present build. Precision wound Mills though, not standard wire wounds. We'll see. Cheers, 91 .......

355: Tube DIY Asylum, RE: Preamp Preview (0.00)
Posted by 91derlust on 2018-04-19, 14:24:45 (101.183.182.152)
Those finned things are easy to use/mount if you are not dissipating much power through them. My preference is for paralleled Mills MRA-12: can mount in free air, accurate values, and non-magnetic. Ch .......

356: SET Asylum, Sure! (0.00)
Posted by 91derlust on 2018-04-16, 22:20:25 (101.183.182.152)
Two I can think of... Yamamoto is still around... and can be picked up used. Triode Lab makes a few. Cheers, 91. .......

357: Tube DIY Asylum, Try the WS1, see link (0.00)
Posted by 91derlust on 2018-04-11, 04:08:54 (101.183.182.152)
I'm gonna order some! Cheers, 91 .......

358: SET Asylum, RE: 45 Tubes (0.00)
Posted by 91derlust on 2018-04-10, 15:35:40 (165.86.71.71)
The arc over and plate dissipation problems have been long addressed - not an issue any more. However, in a directly coupled amp make sure the filaments have juice before applying B+; that is a worthw .......

359: Tube DIY Asylum, Thanks for the info BB! (0.00)
Posted by 91derlust on 2018-04-09, 15:06:48 (101.183.182.152)
With EML 2A3-S tubes I have managed slightly under 2.0mV (currently 3.0 and 2.5 mV running JJ2A3) in a stereo amp with less than ideal input stage layout and grounding. I'm hoping my present build wil .......

360: Tube DIY Asylum, RE: Finding hum in my DHT amp (0.00)
Posted by 91derlust on 2018-04-08, 12:46:17 (101.183.182.152)
It is largely about perspective. Discussions here in the past suggest circa 2.5mV not bad at all wit lower being better, of course. 0.6mV with AC filaments is very low. I assume you are running split .......

361: Tube DIY Asylum, RE: Could this be the reason (0.00)
Posted by 91derlust on 2018-03-29, 17:57:16 (101.183.182.152)
Thanks Eli. I'll try 0v signal grounding near the rca input in my mono build. Cheers, 91. .......

362: Tube DIY Asylum, RE: Could this be the reason (0.00)
Posted by 91derlust on 2018-03-28, 21:19:48 (165.86.81.71)
Hi Eli - sorry for the semi-OT. In my last build I grounded 0v signal to the chassis right next to the safety earth, as you mentioned. It's also seen a good case made to ground 0v signal close to the .......

363: Tube DIY Asylum, Gotcha. (0.00)
Posted by 91derlust on 2018-03-25, 02:25:13 (101.183.182.152)
Your safety earth connects the IEC pin to the bus bar, then from the bus bar to the chassis. Interesting. Hope you get it sorted soon. Cheers, 91. .......

364: Tube DIY Asylum, RE: is the PT's CT grounded? (0.00)
Posted by 91derlust on 2018-03-24, 04:10:49 (101.183.182.152)
I've not been following this in detail - apologies if I have missed something. How is your bus bar connected to the mains ground?(!) Where I come from, the mains safety earth is connected to the chass .......

365: Tube DIY Asylum, Wowsers! nt. (0.00)
Posted by 91derlust on 2018-03-17, 23:11:36 (101.183.182.152)
. .......

366: Tube DIY Asylum, RE: They are measureable (0.00)
Posted by 91derlust on 2018-03-17, 23:03:58 (101.183.182.152)
C'mon T-K. We both know Stephen was not claiming there is a measure of flavour... more that there is some corroboration on the (sonic, measurable?) effects of different materials and construction. It' .......

367: SET Asylum, RE: There is a happy medium, somewhere... (0.00)
Posted by 91derlust on 2018-03-15, 20:39:33 (165.86.81.71)
"Are cathode bias SETs sensitive to diffent cathode bypass caps?" Although my experience is limited, yes. My current preference is to calculate the minimum uF needed (and add some wiggle room), over-r .......

368: SET Asylum, RE: 3 weeks without a new post... why is this forum even here? (nt) (0.00)
Posted by 91derlust on 2018-03-14, 16:29:09 (165.86.81.71)
Why SET Asylum? The Asylum forum structure appears to have evolved ad hoc. There are Amp/Pre, SET, and Tubes asylums that could suit SET-related posts, depending on what variation of SET amp is being .......

369: SET Asylum, RE: 3 weeks without a new post... why is this forum even here? (nt) (0.00)
Posted by 91derlust on 2018-03-14, 15:44:43 (101.183.182.152)
I'm with you on all counts. I find the Tube DIY forum very helpful for technical assistance. There seems little propensity for people sharing stories, personal preferences, voicing etc. I suspect the .......

370: General Asylum, RE: What's In A Name! (0.00)
Posted by 91derlust on 2018-03-13, 03:02:17 (101.183.182.152)
Sadly, I rode a single speed Colossi with stem, bars, cranks etc. branded Cunit. I got some double-takes on that thing. 91. .......

371: Tube DIY Asylum, RE: Do bypass caps really make a difference????? (0.00)
Posted by 91derlust on 2018-03-09, 17:45:14 (101.183.182.152)
Ah Jeff, making friends where ever he goes. The haven seems like a pleasant place - supportive and sharing. Missionary Jeff shows superficial signs of realising he is more zealot than evangelist, it w .......

372: Tube DIY Asylum, RE: Is Magnaquest still in business? (0.00)
Posted by 91derlust on 2018-03-03, 21:05:08 (101.183.182.152)
Maybe ask on the MagneQuest forum? Cheers, 91. .......

373: Tube DIY Asylum, RE: Don Allen P/P 2A3 theater amps - pulled out of long term storage (0.00)
Posted by 91derlust on 2018-03-02, 20:20:05 (101.183.182.152)
Looking forward to hearing about this project. This is a great place for getting assistance, but I'd like to see more sharing of build stories - the history, the why, the who - rather than only the en .......

374: Tube DIY Asylum, Rhetoric over relevance. Nt. (0.00)
Posted by 91derlust on 2018-03-01, 00:04:03 (101.183.182.152)
. .......

375: Tube DIY Asylum, RE: Class B? McIntosh pretty much sums up that sound~nT (0.00)
Posted by 91derlust on 2018-03-01, 00:02:18 (101.183.182.152)
I guess if ya need da juice ya need da juice. There are other, preferable to me, ways though. Cheers, 91. .......

376: Inmate Central, RE: Two Fewer Cats this Month (0.00)
Posted by 91derlust on 2018-02-26, 22:03:21 (101.183.182.152)
Commiserations. As others have said, you did the right thing, though it was difficult and you continue to feel the pain of loss. Take care. The thought of losing our rescue cat - a very dear and impor .......

377: SET Asylum, RE: Just finished my first 2A3 SET system... (0.00)
Posted by 91derlust on 2018-02-23, 07:31:56 (101.183.182.152)
Good times ahead for you! I'm curious about the filament upgrade - do you know if it is available for non-BottleHeaders? Cheers, 91. .......

378: SET Asylum, RE: Just finished my first 2A3 SET system... (0.00)
Posted by 91derlust on 2018-02-20, 12:12:33 (101.183.182.152)
Sounds like a nice a system. I reckon Pual would have done a nice job designing those Stereomores - much respect for PJ. Also, well done resurrecting the NHTs. Welcome to the 2A3 club! Enjoy. Cheers, .......

379: High Efficiency Speaker Asylum, Thanks again Ralph. Nt. (0.00)
Posted by 91derlust on 2018-02-20, 02:06:23 (101.183.182.152)
. .......

380: Tube DIY Asylum, RE: I was scratching my head over POM then Googled and had a laugh (0.00)
Posted by 91derlust on 2018-02-19, 21:40:48 (101.183.182.152)
Hah Bill, goodness know what results you managed to pull out of Google: a plastic highly prized by Englishmen? I wouldn't know - I don't Google. Delrin is the brand name for a homopolymer version of P .......

381: Tube DIY Asylum, Sorry, nothing so virtuous... (0.00)
Posted by 91derlust on 2018-02-18, 23:48:09 (101.183.182.152)
as actually producing those pieces - I wish I had the skills and equipment. For these pieces, DIY only goes so far as planning, drawing, arranging the CNCing, and assembly. For this project I thought .......

382: Tube DIY Asylum, A bit more plastic: connector panels etc. (0.00)
Posted by 91derlust on 2018-02-17, 19:51:33 (101.183.182.152)
This is a blurry photo of the mirror-imaged connector panels and also the PS subchassis with socket and brass stand-offs. The connector panels are inset from the chassis edge (using layers of space .......

383: Tube DIY Asylum, RE: Place to get nice on/off power switches (0.00)
Posted by 91derlust on 2018-02-17, 17:42:03 (101.183.182.152)
I assume for power? As others have said, Mouser. I'm using this Mountain SPST in my present build. Cheers, 91. .......

384: Tube DIY Asylum, RE: Finally, amp build progress. (0.00)
Posted by 91derlust on 2018-02-17, 15:15:45 (101.183.182.152)
Although prototyping at present, the final result will installed in the enclosure: the layout can be refined on the bench then bolted into the enclosure. The final module will look much tidier than sh .......

385: Tube DIY Asylum, Finally, amp build progress. (0.00)
Posted by 91derlust on 2018-02-17, 02:08:36 (101.183.182.152)
I've been procrastinating about my 2nd amp build for, well, years. Got my act together and the last of the components are arriving, though I am still waiting on the enclosure/s. Today was able to do a .......

386: Tube DIY Asylum, RE: Good way to secure capacitors (0.00)
Posted by 91derlust on 2018-02-17, 00:32:20 (101.183.182.152)
Do you have the option to drill the chassis? If so, the tie wrap anchors that screw to the chassis can work well. I prefer using fasteners to adhesives; maybe I'm just old school? Cheers, 91. ::: TOPI .......

387: High Efficiency Speaker Asylum, I read it, but... (0.00)
Posted by 91derlust on 2018-02-16, 23:22:34 (101.183.182.152)
I get that impedance and phase angles matter in a constant power paradigm... but still not specifically how an increase/peak in impedance over a narrow frequency range can lift acoustic output in same .......

388: High Efficiency Speaker Asylum, Guess what I'm reading tonight. Thanks. nt. (0.00)
Posted by 91derlust on 2018-02-15, 19:08:36 (101.183.182.152)
. .......

389: High Efficiency Speaker Asylum, Ah, I got it... (0.00)
Posted by 91derlust on 2018-02-14, 23:51:05 (49.197.246.145)
makes perfect sense - knew I was missing something. For a given power output (Wattage), increasing impedance decreases current draw and increases voltage; voltage is responsible for acoustic output. C .......

390: High Efficiency Speaker Asylum, RE: Would this Impedance Plot / Electrical Phase work with SET amps? (0.00)
Posted by 91derlust on 2018-02-14, 23:48:10 (49.197.246.145)
Thanks Bill. But aren't folks saying just that: voltage changes according to impedance; impedance can vary according to frequency. Therefore voltage and cone excursion vary (slightly) according to fre .......

391: High Efficiency Speaker Asylum, RE: Would this Impedance Plot / Electrical Phase work with SET amps? (0.00)
Posted by 91derlust on 2018-02-14, 12:54:01 (49.197.217.8)
I'm often confused about the impedance peaks causing frequency response bumps. I must be missing something: don't SET amps produce less power as impedance increases - wouldn't an impedance peak reduce .......

392: Tube DIY Asylum, RE: Thoughts: (0.00)
Posted by 91derlust on 2018-02-09, 18:14:23 (101.183.182.152)
As drawn, the CCS are mu out. IIRC, they provide low source impedance... but less ideal current loops or some such. Never used them. Cheers, 91. .......

393: Music Lane, RE: Nils Frahm: All Melody (0.00)
Posted by 91derlust on 2018-02-09, 18:08:35 (101.183.182.152)
Yep. Nice to Erased Tapes music available on Tidal. Cheers, 91. .......

394: Music Lane, Nils Frahm: All Melody (0.00)
Posted by 91derlust on 2018-02-08, 23:09:38 (101.183.182.152)
All Melody was released today - should be right up my alley. Available from Erased tapes. If you like his stuff and find your way to the Erased Tapes website, read up on the intriguing back story of t .......

395: Tube DIY Asylum, Sweeeeet holes. (0.00)
Posted by 91derlust on 2018-02-08, 20:16:00 (101.183.182.152)
I generally don't like a wooden frame with top and bottom plates - I've just added your build to the very small list of exceptions. Lovely stuff - I wish my system looked as pretty. Cheers, 91. ::: TO .......

396: Tube DIY Asylum, Thanks Dave. (0.00)
Posted by 91derlust on 2018-02-07, 12:25:56 (101.183.182.152)
I'll start with the ClarityCap TCs, but reckon I'll have ASCs in my amp before too long. Cheers, 91. .......

397: Tube DIY Asylum, RE: Motor run caps are a pain to install (0.00)
Posted by 91derlust on 2018-02-06, 01:45:27 (101.183.182.152)
I leave enough space under the chassis. The less attached to or through the chassis the better. Cheers, 91. .......

398: Tube DIY Asylum, I'm not surprised... but am curious (0.00)
Posted by 91derlust on 2018-02-05, 22:14:25 (101.183.182.152)
in what what ways you preferred the ASCs. I we are similar in how we like music presented and I value your opinion. I have some ClarityCap TC metalised films for the PSU of my next build (not DC Links .......

399: Tube DIY Asylum, RE: PP 45 schematic? (0.00)
Posted by 91derlust on 2018-02-03, 15:05:57 (101.183.182.152)
From memory, the Magnequest Seth with a change to the bias R should work... maybe use a slightly higher load on the tubes? Easy build, but requires a perhaps a bit more "iron" than you'd like. It's a .......

400: General Asylum, Did you read beyond the subject line? (0.00)
Posted by 91derlust on 2018-02-02, 12:57:42 (101.183.182.152)
A discourse is a discussion about a topic, not necessarily in support of nor against it. Reductionist thinking has its place - I'm not against it - but generally prefer other approaches for "evaluatin .......

401: General Asylum, Well, that's quite the reductionist discourse. (0.00)
Posted by 91derlust on 2018-02-01, 17:41:40 (165.86.81.71)
Although I find reductionist thinking helpful, when it comes to the experiencing music in my own home, I prefer a systems thinking approach with a focus on external validity as the final arbiter. Afte .......

402: SET Asylum, RE: Urangan (0.00)
Posted by 91derlust on 2018-01-29, 18:05:54 (165.86.71.71)
Sound like you are enjoying your time out here. Hope you've had the chance to go Fly Fishing. Trip to Fraser island? Cheers, 91. .......

403: SET Asylum, Brisbane! (0.00)
Posted by 91derlust on 2018-01-29, 01:18:17 (101.183.8.157)
So only a couple hours by car. Whatcha doing over this part of the world - I thought you were US based. Escaping cold? A Hervey Bay summer just a touch warmer than a US winter. .......

404: SET Asylum, RE: Why 300b ? (0.00)
Posted by 91derlust on 2018-01-28, 19:29:15 (165.86.71.71)
Widely available at range of prices and sonic presentations. Sufficient power for wider range of systems and preferences than a 45 or 2A3 can support. Also, sonics are shaped somewhat by the chosen op .......

405: SET Asylum, RE: Short listing 300b based monoblocks (0.00)
Posted by 91derlust on 2018-01-25, 17:49:08 (101.183.8.157)
Some nice design and parts elements to that amp. Price seems fair considering the quality of some of the parts. Cheers, 91. .......

406: SET Asylum, RE: Short listing 300b based monoblocks (0.00)
Posted by 91derlust on 2018-01-24, 20:15:01 (101.183.8.157)
Just that connector locations and the additional size and ac cable will not suit all system configurations. Cheers, 91. .......

407: SET Asylum, RE: Short listing 300b based monoblocks (0.00)
Posted by 91derlust on 2018-01-22, 18:30:40 (165.86.81.71)
Lots of amps out there at various price points. It may come down to what you can hear locally or with reasonable travel and cost. Off the top of my head... Mono (note: some monos are still a PITA to l .......

408: Tube DIY Asylum, RE: Phono Pre Isolation (0.00)
Posted by 91derlust on 2018-01-15, 19:05:42 (165.86.81.71)
Steel is nice. Brass is nice, in moderation. POM can be nice too - not dead or distant sounding like some plastics; doesn't lend a "microphonic" sound either. I like to use a combination, with tubes a .......

409: High Efficiency Speaker Asylum, RE: Help for Designing Built In Cabinets for GPA 604s (0.00)
Posted by 91derlust on 2018-01-13, 21:28:53 (101.183.32.161)
Sounds like an interesting project. Welcome to the Duplex dark side! Not really answering your question... just letting you know that Dennis's approach remains controversial and care should be taken. .......

410: Tube DIY Asylum, RE: Phono Pre Isolation (0.00)
Posted by 91derlust on 2018-01-13, 17:23:15 (101.183.32.161)
Off topic. I find Thomas's builds to be a bit like my childhood Meccano creations with an attractive cover. Kinda cool, flexible, cost-effective solution to chassis challenges. Cheers, 91. ::: TOPIC:: .......

411: Tube DIY Asylum, RE: Phono Pre Isolation (0.00)
Posted by 91derlust on 2018-01-13, 17:16:58 (101.183.32.161)
Despite having done only a little experimenting with the use of different materials, I've been surprised with the results. Most recently, when using a Herbies isolation/damping product under my footer .......

412: General Asylum, The world needs more Kurt Denkes. Nt. (0.00)
Posted by 91derlust on 2018-01-05, 13:20:29 (101.183.32.161)
. .......

413: Tube DIY Asylum, Looking pretty damn sweet T-K! (0.00)
Posted by 91derlust on 2017-12-30, 21:10:12 (101.183.32.161)
Clear to see the quality of planning that has gone into that build. Kudos. Cheers, 91. .......

414: Tube DIY Asylum, RE: Why sweat the screws when they will be "hidden" (0.00)
Posted by 91derlust on 2017-12-30, 20:53:55 (101.183.32.161)
I am thinking stainless internal hex - looks committed, strong and allows easier centring of the tool. Thoughts? Cheers, 91. .......

415: Speaker Asylum, RE: Original Altec 604 speakers vs rebuild (0.00)
Posted by 91derlust on 2017-12-05, 10:56:46 (101.183.204.72)
Depends on one's definition of "shout". I run GPA 604s and the shout people attribute to (some) horns is absent. Are studio monitoring horns designed for long distance projection? Cheers, 91. ::: TOPI .......

416: Tube DIY Asylum, Nice build Chip. But what I really like is: (0.00)
Posted by 91derlust on 2017-11-26, 21:44:22 (101.183.103.41)
"There is something relaxing about building something to simply function and sound good without being all audiophile crazy about it. Listening to it makes me think long and hard about the law of dimin .......

417: Tube DIY Asylum, Furutech ft-903 (0.00)
Posted by 91derlust on 2017-11-18, 14:32:08 (101.183.103.41)
Low mass connector, Cu conductor, plastic/resin body... and importantly for me, I can make a good mechanical connection before soldering. I have them on the shelf for my next build. Costly though. Che .......

418: Tube DIY Asylum, RE: Insulated Phono Jacks (0.00)
Posted by 91derlust on 2017-11-17, 21:09:36 (101.183.103.41)
That's what I do. Laser cutting allows accurate keying of mounts - no loose connectors or need to over tighten. I've had success with POM/ Delrin; PTFE/Teflon is too soft. There are other plastics tha .......

419: Tube DIY Asylum, That has not been my (limited) experience. (0.00)
Posted by 91derlust on 2017-11-09, 15:53:57 (165.86.71.71)
In DHT output stages I have heard unexpected differences between capacitors of the same value. Still, it is a very small sample size and therefore... Cheers, 91 .......

420: Tube DIY Asylum, RE: You might want some power line filtering to your DAC (0.00)
Posted by 91derlust on 2017-10-25, 16:11:22 (165.86.81.71)
Yeah, there are some other power line issues - any power switching, though sometimes it is an issue, at other times not. I've tried a power conditioner but it did not help. I might try a different typ .......

421: Tube DIY Asylum, RE: Because people love to worry (0.00)
Posted by 91derlust on 2017-10-25, 00:51:04 (101.183.103.41)
The power switching arcing "pop" from my current amp triggers the protection circuitry of my (overly sensitive) DAC. It would be nice to eliminate it (and avoid it on my next build) for a few bucks if .......

422: Tube DIY Asylum, RE: Power switch arc suppression (0.00)
Posted by 91derlust on 2017-10-22, 13:05:33 (101.183.103.41)
Thanks Steve - I was missing something from my calcs. After my next build I'll be going back to the books! Cheers, 91. .......

423: Tube DIY Asylum, RE: One more question... then hopefully sorted. (0.00)
Posted by 91derlust on 2017-10-22, 12:50:34 (101.183.103.41)
Ah, thought I must be missing something! Thanks C-B - I now have a way forward. Cheers, 91 .......

424: Tube DIY Asylum, One more question... then hopefully sorted. (0.00)
Posted by 91derlust on 2017-10-22, 01:46:25 (101.183.103.41)
Thanks again all. I've elaborated here on my post below... I've been looking at the combination suppressors. The circuit draws about 0.2A at 240V, so it looks like I'll need roughly 0.22uF/100Ohm, th .......

425: Tube DIY Asylum, No problem Paul - thanks very much! nt. (0.00)
Posted by 91derlust on 2017-10-21, 22:43:57 (101.183.103.41)
. .......

426: Tube DIY Asylum, RE: Power switch arc suppression (0.00)
Posted by 91derlust on 2017-10-21, 21:11:40 (101.183.103.41)
Thanks Steve. I've been looking at the arc suppression R/C combos - they appear to be 0.5W rated. My circuit draws about 0.2A at 240V; 0.5W for 100R seems insufficient... a 22R would probably suffice, .......

427: Tube DIY Asylum, It does help alot! Thanks. nt. (0.00)
Posted by 91derlust on 2017-10-21, 19:40:17 (101.183.103.41)
. .......

428: Tube DIY Asylum, Thanks Paul, but... (0.00)
Posted by 91derlust on 2017-10-21, 15:50:37 (101.183.103.41)
I don't see anything linked. I'll DuckDuckGo it and see what turns up. OT: I don't trust Google to be transparent in the management and use of my information; I don't find them to be an ethical compan .......

429: Tube DIY Asylum, Thanks all for your suggestions - very helpful. (0.00)
Posted by 91derlust on 2017-10-21, 15:43:14 (101.183.103.41)
With your info as a guide, I'll look into this further. Cheers, 91. .......

430: Tube DIY Asylum, RE: Power switch arc suppression (0.00)
Posted by 91derlust on 2017-10-20, 23:27:17 (101.183.103.41)
Thanks heaps! I'll try a 0.1uF 1500V Wima across the switch. Cheers, 91. .......

431: Tube DIY Asylum, 2mm Austenitic Stainless Steel (0.00)
Posted by 91derlust on 2017-10-20, 23:23:40 (165.86.71.71)
For example, common 302 type. Essentially non-magnetic, good shielding properties, strong, easy and reliable electrical bonding, does not corrode (in domestic use) and depending on machining, may not .......

432: Tube DIY Asylum, Power switch arc suppression (0.00)
Posted by 91derlust on 2017-10-20, 23:11:39 (101.183.103.41)
I'd like to suppress arcing across the power switch of my 2A3 SET amp. From memory, 10 to 20 R in series with a 0.1 to 0.5 uF high-voltage capacitor across the switch has been suggested. We run 240V A .......

433: Tube DIY Asylum, RE: nice little triode wired SE 6v6 (0.00)
Posted by 91derlust on 2017-09-30, 13:20:05 (101.183.103.41)
Vinnie, your arguments are increasingly irrational and circular. You are the poster who started obscuring the argument with semantics. I suspect it is intentional: previous posts clearly show you know .......

434: Tube DIY Asylum, You are deceiving yourself vinnie. (0.00)
Posted by 91derlust on 2017-09-29, 18:59:39 (101.183.103.41)
"Maybe for some people that is what they want to do, learn how to design. Fine, I wish them well. I have stated repeatedly that it is NOT what I want to do and is not necessary for the things I want t .......

435: Tube DIY Asylum, RE: nice little triode wired SE 6v6 (0.00)
Posted by 91derlust on 2017-09-29, 18:54:02 (101.183.103.41)
Let's try again: "All you need to build an amp or other tube gear is a good schematic if that is all you want to do." Irrelevant. I think your point is that you don't need to understand basic tube the .......

436: Tube DIY Asylum, RE: Sure it does (0.00)
Posted by 91derlust on 2017-09-29, 17:53:35 (101.183.103.41)
You're right vinnie. You are a beacon of hope to this forum. Seriously though, you are posting your builds... but what are they contributing? I'm more focussed on quality than quantity; with limited d .......

437: Tube DIY Asylum, RE: Sure it does (0.00)
Posted by 91derlust on 2017-09-28, 20:19:58 (165.86.71.71)
I don't like doing this. I think it is important for you to understand why it would be helpful to learn some basics. I suspect you need direct responses - general explanations are not enough to convin .......

438: Tube DIY Asylum, RE: Life is easier if you don't take the piss. (0.00)
Posted by 91derlust on 2017-09-28, 05:05:49 (101.183.103.41)
I don't agree... and noticed you conveniently avoided the main point. No bother, we're human so that should be expected. 91. .......

439: Tube DIY Asylum, Life is easier if you don't take the piss. (0.00)
Posted by 91derlust on 2017-09-28, 04:22:38 (101.183.103.41)
I see it differently. Plenty of resources exist to get some basic knowledge quickly. Having that knowledge provides a better understanding for troubleshooting and asking questions. It helps develop yo .......

440: Tube DIY Asylum, +1. nt. (0.00)
Posted by 91derlust on 2017-09-27, 21:33:26 (101.183.96.246)
. .......

441: Tube DIY Asylum, RE: Have you had your hearing checked? (0.00)
Posted by 91derlust on 2017-09-27, 19:05:15 (101.183.96.246)
People will have different expectations/standards... and ways of achieving them. This runs deep into ego (beliefs and self-worth) - hurt and defensive (offensive!) reactions will often result from con .......

442: Tube DIY Asylum, RE: life is easier for the 1% ... (0.00)
Posted by 91derlust on 2017-09-27, 18:50:28 (101.183.96.246)
But vinnie, do you stick to "schematics already in existence"? If you stick to building proven designs verbatim, you might still benefit from learning how to build well, test and troubleshoot... but y .......

443: Tube DIY Asylum, Thanks for the advice c-b. nt. (0.00)
Posted by 91derlust on 2017-09-27, 13:38:07 (101.183.96.246)
. .......

444: Digital Drive, RE: MQA Frampton (0.00)
Posted by 91derlust on 2017-09-27, 01:16:04 (101.183.96.246)
I sympathise with Rob Gordon (first few seconds of the vid.) ;^) 91. .......

445: Tube DIY Asylum, RE: Bias resistor recommendations (0.00)
Posted by 91derlust on 2017-09-26, 13:11:08 (101.183.96.246)
I've not experimented, but have taken the advice of builders I trust to avoid the use of magnetic components (like those gold finned wire wound power resistors) in the signal path/current loops. Trans .......

446: Tube DIY Asylum, Lovely looking amps Willie. nt. (0.00)
Posted by 91derlust on 2017-09-26, 01:27:55 (101.183.96.246)
. .......

447: Tube DIY Asylum, RE: Bias resistor recommendations (0.00)
Posted by 91derlust on 2017-09-26, 00:30:01 (101.183.96.246)
I use paralleled Mills MRA-12 bypasses with Mundorf Evo Oil. The Evo is perhaps a bit treble enhanced, but vibrant without being rough. My next amp will use the Mills but not the Evo. Edit: fix frikke .......

448: SET Asylum, Forum organisation and off-topic posts (0.00)
Posted by 91derlust on 2017-09-25, 20:08:44 (165.86.71.71)
Well, I like to hear about many aspects of a build project... from what a designer/builder is trying to achieve, how they plan to achieve it, what they do (design and build), their challenges and succ .......

449: Tube DIY Asylum, RE: Increase L in pi network (0.00)
Posted by 91derlust on 2017-09-23, 12:51:28 (101.183.96.246)
I think that is a good decision. Please, let us know how you go with that. Cheers, 91. .......

450: Tube DIY Asylum, RE: Increase L in pi network (0.00)
Posted by 91derlust on 2017-09-22, 19:07:05 (101.183.96.246)
If you are looking for more "speed" I don't think that in your case increasing the inductance and DCR will deliver. Actually, it will probably slow PS recovery - something that you don't want - and yo .......

451: Tube DIY Asylum, RE: Anything new about the cathode bypass caps? (0.00)
Posted by 91derlust on 2017-09-19, 15:33:34 (165.86.71.71)
I don't have the formula to hand right now, but doesn't it need to take into account the -3dB point. In my amp, for the target -3dB point I get a touch less than 22uF... but I'm running direct couple .......

452: Tube DIY Asylum, RE: Anything new about the cathode bypass caps? (0.00)
Posted by 91derlust on 2017-09-18, 18:33:43 (165.86.71.71)
Not sure it is new (to you), I remember many years ago Thorsten's posts about experimenting with cathode cap types and sizing. He became an advocate of using film caps in preference to even the well-r .......

453: Tube DIY Asylum, RE: To the Bored (0.00)
Posted by 91derlust on 2017-09-16, 15:12:43 (101.183.96.246)
I think Lynn might have adjusted his view re speakers. Last I read, he was designing a speaker that used a big GPA 416 Alnico mid-bass driver. Cheers 91. .......

454: Tube DIY Asylum, RE: You could not validate Shane's point better if you tried. nt. (0.00)
Posted by 91derlust on 2017-09-15, 01:26:28 (101.183.96.246)
No probs. Very much agreed regarding ego - self-worth is bundled up in our fundamental beliefs being correct... this is just a hobby for me, but it must be tough for engineers having their absolute un .......

455: Tube DIY Asylum, You could not validate Shane's point better if you tried. nt. (0.00)
Posted by 91derlust on 2017-09-15, 00:57:05 (101.183.96.246)
. .......

456: SET Asylum, RE: Hmmmm.. (0.00)
Posted by 91derlust on 2017-09-14, 15:55:55 (101.183.96.246)
Nice photo. I don't see many of the important parts of the build. I'm interested in what is going on under the chassis. Cheers, 91. .......

457: Tube DIY Asylum, RE: That's the crux of this matter, (0.00)
Posted by 91derlust on 2017-09-08, 01:46:13 (101.183.23.163)
Or fail to take into account: Expectation/ confirmation bias cuts both ways (positive and negative). If someone does not expect to hear something - for example, through their EE training - then they a .......

458: SET Asylum, I use that advice... (0.00)
Posted by 91derlust on 2017-09-06, 22:30:47 (101.183.23.163)
when working out whether my amp will have enough juice. PJ has shared it a few times times in the past. Yes, an acid trip is right. I mostly stay out of it these days... Where else is there to go? DIY .......

459: Tube DIY Asylum, RE: I just post this below. (0.00)
Posted by 91derlust on 2017-09-05, 15:46:15 (101.183.23.163)
Thanks Tre - another one of your posts I'll be saving for my records. I almost always find your posts helpful. Cheers, 91. .......

460: SET Asylum, RE: Nice post Dennis. (0.00)
Posted by 91derlust on 2017-09-05, 04:18:58 (101.183.23.163)
Unfortunately not. The flight from Australia's East Coast is brutal. Cheers, 91 .......

461: Tube DIY Asylum, RE: Coupling Capacitors (0.00)
Posted by 91derlust on 2017-09-05, 04:14:35 (101.183.23.163)
Hi Andy. You've mentioned a few times experimenting with cathode caps. For context and my own learning, what have you tried? I'd like to try filament bias someday. Cheers, 91 .......

462: SET Asylum, Nice post Dennis. (0.00)
Posted by 91derlust on 2017-09-04, 15:53:19 (101.183.23.163)
As Tre says: "honest"... and demonstrates a quiet strength absent in the strongly-worded machismo commonly posted here. Despite my criticism of (your) absolutist posts/ stance and question your techni .......

463: SET Asylum, RE: Well - we're bound to have different views (0.00)
Posted by 91derlust on 2017-09-03, 14:12:53 (101.183.23.163)
Still, your opinions re DIY serve you well as a reviewer of - by a large margin - commercial products. Your language bears this out: "...send me a DIY project they feel will trounce any production pro .......

464: SET Asylum, RE: Well - we're bound to have different views (0.00)
Posted by 91derlust on 2017-09-03, 02:05:03 (101.183.23.163)
Sure, there are some DIYers and builds like that, some that are not and some with a few of those traits. Your opinions re DIY serve your role as a reviewer well. 91. .......

465: SET Asylum, RE: Well - we're bound to have different views (0.00)
Posted by 91derlust on 2017-09-02, 18:07:38 (101.183.23.163)
I agree in principle Andy: "But it still remains a fact that the "boutique" high end low-volume builds are very expensive compared to the costs of building your own. Especially when you want to specif .......

466: SET Asylum, RE: DC Link pulse types. Nt (0.00)
Posted by 91derlust on 2017-08-05, 18:11:21 (120.155.137.235)
Sure are, but he uses them as the "main" cap then bypasses the crap out of them. I've not used them so can't vouch for their effectiveness. Being industrial films, they should be reliable. I'll give t .......

467: SET Asylum, DC Link pulse types. Nt (0.00)
Posted by 91derlust on 2017-08-05, 13:33:15 (120.155.137.235)
. .......

468: SET Asylum, RE: I've had a lot of success with this (0.00)
Posted by 91derlust on 2017-08-04, 19:33:55 (120.155.137.235)
If one thinks in terms of a SET map being a modulated power supply and that current loops are the (main) signal path, then cathode bypass caps are important... possibly more important than coupling ca .......

469: SET Asylum, RE: If you want to spend some extra $$ (0.00)
Posted by 91derlust on 2017-08-03, 21:20:53 (120.155.137.235)
Apologies, I was being a touch smart (not in a positive way). My point was that the Kaisei 'lytic are priced in the realm of decent metalised films; ClarityCap CSA springs to mind (have not heard them .......

470: SET Asylum, RE: If you want to spend some extra $$ (0.00)
Posted by 91derlust on 2017-08-03, 03:35:13 (120.155.137.235)
Question/s: why use a 'lytic - albeit a nice one - in a location that sees all the current from the stage it biases? The cathode cap is just as (maybe more) critical than the coupling cap - why not us .......

471: SET Asylum, RE: BEZ T3A-3 amp 2A3 (0.00)
Posted by 91derlust on 2017-07-29, 00:08:37 (120.155.137.235)
An anaemic pentode shouldn't smear the high frequencies together. I'd expect it to be more like a gradual roll-off of the high frequencies. No smearing in my system - doesn't sound overtly rolled off .......

472: High Efficiency Speaker Asylum, RE: REVIEW: Tekton Design Lore Speakers (0.00)
Posted by 91derlust on 2017-07-28, 19:41:22 (120.155.137.235)
Good point. With most of the acoustic energy in much music being generated in the bass to lower mid frequencies, if a speaker is not efficient there, then it is not practically efficient. Still, as yo .......

473: High Efficiency Speaker Asylum, I hear ya! (0.00)
Posted by 91derlust on 2017-07-28, 19:29:22 (120.155.137.235)
In Roon, I can now easily see the dynamic range of recordings. Amazing that much of the ambient (not new age) and minimal composition - quiet music - is far more dynamic than "energetic" popular recor .......

474: High Efficiency Speaker Asylum, RE: REVIEW: Tekton Design Lore Speakers (0.00)
Posted by 91derlust on 2017-07-28, 15:36:36 (120.155.137.235)
If you are normally listening between 10 and 60% of power output of that amp into the Lores, you are normally damaging your hearing. If those Lores are 98dB at 1 Watt, then 4W per side will yield abou .......

475: Tube DIY Asylum, RE: Maybe use short threaded standoffs? (0.00)
Posted by 91derlust on 2017-07-19, 00:34:13 (101.183.42.24)
Thanks again all. It would be very inconvenient because I use subchassis that would obscure access to the lock washer, if used out of sight underneath the chassis. I may have been trying to solve a "p .......

476: Tube DIY Asylum, RE: Maybe use short threaded standoffs? (0.00)
Posted by 91derlust on 2017-07-18, 13:02:22 (101.183.42.24)
Thanks Tk. Yea, in my case the hole where the hold down bolt passes through would be powder coated and a touch oversize - no guarantee the bolt would touch it. I guess I was concerned about the cage b .......

477: Tube DIY Asylum, RE: Maybe use short threaded standoffs? (0.00)
Posted by 91derlust on 2017-07-18, 02:09:00 (101.183.42.24)
Good idea. Thinking while I type: The snag is that because I am using powder coat on both sides of the cage and chassis, at no point would bare metal on the cage connect with bare metal on the chassis .......

478: Tube DIY Asylum, How do you safety earth your tube cages? (0.00)
Posted by 91derlust on 2017-07-18, 00:16:09 (101.183.42.24)
I've just realised that my plan for tube protection in my next amp build uses a metal cage that is not safety earthed. I know, the chances of it being an issue are remote... but present. I'm powder co .......

479: Tube DIY Asylum, RE: Test point advice please (0.00)
Posted by 91derlust on 2017-07-13, 21:29:09 (165.86.71.71)
Thanks guys. Based on your comments: I won't implement the jacks to the plate resistor (not really needed). this will help avoid the potential for noise in a high impedance part of the circuit. I'll .......

480: Tube DIY Asylum, Test point advice please (0.00)
Posted by 91derlust on 2017-07-13, 00:59:05 (101.183.42.24)
Can someone advise whether there is a risk of adding noise to a circuit or other issues when using permanently connected external test points on a SET amp? The amp will be direct-coupled and it might .......

481: Tube DIY Asylum, Er, no. Not nearly. (0.00)
Posted by 91derlust on 2017-07-11, 02:26:44 (101.183.42.24)
Did you even read the post - that is a bizarre interpretation. I have explained myself as much as I intend to. Take a break from the forum. Rest. Take care. 91. .......

482: Tube DIY Asylum, RE: C'mon vinnie, people are trying to help. (0.00)
Posted by 91derlust on 2017-07-11, 02:12:07 (101.183.42.24)
Vinnie, I don't see them baiting and tit for tat achieves little but burning relationships. Yes, you are pissed. Others are exasperated and frustrated. There is little to be gained from continuing in .......

483: Tube DIY Asylum, C'mon vinnie, people are trying to help. (0.00)
Posted by 91derlust on 2017-07-11, 00:20:36 (101.183.42.24)
Vinnie, The folks here are trying to help you - now and have done extensively in the past. They share their experience and opinions and invest their time and energy. Mostly, they don't need you to agr .......

484: Tube DIY Asylum, No - it lacks validity. (0.00)
Posted by 91derlust on 2017-07-10, 19:15:38 (101.183.42.24)
Let's try again. My current take on this is that the method you used will reveal very little at best and mislead analysis and conclusions at worst. It lacks both internal and external validity. It's j .......

485: Tube DIY Asylum, RE: Has anyone else tried this experiment? (0.00)
Posted by 91derlust on 2017-07-10, 01:22:29 (101.183.42.24)
With that switching approach I'd expect you could identify gross differences between the amplifiers mostly. It simply will not expose much that is significant to musical enjoyment. Critical listening .......

486: SET Asylum, RE: Has anyone modded a pair of Fi 2A3 monos? (0.00)
Posted by 91derlust on 2017-07-06, 19:30:19 (165.86.81.71)
So, he was a practical man that produced creative, artisnal solutions... at a reasonable cost. Cheers, 91. .......

487: SET Asylum, I wouldn't change a thing. (0.00)
Posted by 91derlust on 2017-07-03, 13:56:33 (101.183.42.24)
I'd build something else to scratch the experimenter's itch. Cheers, 91. .......

488: Tube DIY Asylum, RE: Initial A/B test between PP and SE 6bq5 amps (0.00)
Posted by 91derlust on 2017-06-28, 22:29:45 (101.183.42.24)
I'm with you - it can be tough to communicate in text... and I'm not great at it. I try to say too much - most not relevant - only to confuse people, including myself! Probably because I type as I thi .......

489: Tube DIY Asylum, RE: Initial A/B test between PP and SE 6bq5 amps (0.00)
Posted by 91derlust on 2017-06-28, 00:33:51 (101.183.42.24)
I'm sure you have noted - which may be why you are asking - that others have noticed differences between tubes. Hell, I can tell the difference between 2A3 brands and cathode capacitors... significant .......

490: Tube DIY Asylum, RE: Initial A/B test between PP and SE 6bq5 amps (0.00)
Posted by 91derlust on 2017-06-27, 13:20:50 (101.183.42.24)
If they each had cobbled-together power supplies, similar output transformers, cathode bias circuits configurations... or some other dominating/limiting factor to which SETs are sensitive (speaker?), .......

491: SET Asylum, Those words are as relevant today... (0.00)
Posted by 91derlust on 2017-06-27, 02:57:10 (101.183.42.24)
... as they were then. Simple. Succinct. Honest. Warn regards, 91. .......

492: Tube DIY Asylum, RE: Initial A/B test between PP and SE 6bq5 amps (0.00)
Posted by 91derlust on 2017-06-27, 00:21:30 (101.183.42.24)
Sure, if they were bilt using similar techniques and components, well, yeah? Power supplies and output transformers are tougher to implement well for SE amps... and SE amps are sensitive to their qual .......

493: Tube DIY Asylum, RE: Initial A/B test between PP and SE 6bq5 amps (0.00)
Posted by 91derlust on 2017-06-24, 14:51:14 (101.183.42.24)
It depends on implementation. SET and PP have different design needs. Despite having fewer tubes, SET is more costly than class A PP/ fully differential. Cheers, 91. .......

494: Speaker Asylum, RE: Those darn measurements ! (0.00)
Posted by 91derlust on 2017-06-24, 14:44:29 (101.183.42.24)
Can you explain what you mean by "everything" and "listening bias" please? Thanks, 91. .......

495: Speaker Asylum, Disagreement is fine. nt. (0.00)
Posted by 91derlust on 2017-06-16, 16:05:47 (101.183.42.24)
. .......

496: Computer Audio Asylum, Good point! (0.00)
Posted by 91derlust on 2017-06-16, 13:51:24 (101.183.42.24)
One needs to be very careful with their words over here, it appears. Perhaps it will be okay because I used the British spelling - folks may take pity and excuse me for my ineptitude. :) Cheers, 91. : .......

497: Computer Audio Asylum, RE: Can someone comment on the SQ of ROON? (0.00)
Posted by 91derlust on 2017-06-15, 22:47:51 (101.183.42.24)
Roon can sound very nice indeed, but hardware matters as well. I run Roon Core and Roon Ready on the same, "optimised" server. With my DAC connected directly to Core or via Ready, this set-up sounds m .......

498: Computer Audio Asylum, RE: Regarding Beautox below (0.00)
Posted by 91derlust on 2017-06-15, 05:33:44 (101.183.42.24)
Yep, very much so. Your post reminded me I still have a pair of cables Bob lent me many months ago to see if I liked them more than some I bought of him previously. I have not returned them. I will em .......

499: Speaker Asylum, RE: Hear Things Differently (0.00)
Posted by 91derlust on 2017-06-15, 05:13:02 (101.183.42.24)
That is a very literal interpretation. :) To my mind, the poster was referring to personal preference, not significant physiological hearing differences. Why would I think that? Context. This is not a .......

500: SET Asylum, RE: Probably my fault. (0.00)
Posted by 91derlust on 2017-06-14, 21:42:05 (165.86.81.71)
Not really - you were well-intentioned. We got excited with the idea... I just wanted to pull it up before it became a debate about design approaches. Cheers, 91. .......

Found total of 500 records, Query: , Author: 91derlust in All Forums, Time: 1 sec.

New Search