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1: Speaker Asylum, RE: Clearly one big difference (0.00)
Posted by Tubenstein on 2024-02-02, 15:57:21 (49.130.130.187)
Hello! I only knows Dynaidio has made the Esotar for tweeter and part number is d330t. Never heard of d-76 AF has offered a Esotar version. When you listed the pricing of those Esotar drive units, whe .......
2: Speaker Asylum, HiVi DM-7500 vs. Dynaudio D-76AF (0.00)
Posted by Tubenstein on 2024-01-31, 16:44:43 (49.130.129.122)
Anyone has experiments of both units? please kindly tell me the difference. Many thanks 🙏 .......
3: High Efficiency Speaker Asylum, Need comments: Tannoy Canterbury GR (modern) vs. vintage Tannoya GRF (0.00)
Posted by Tubenstein on 2024-01-06, 08:52:55 (49.130.128.251)
What are your comments between these two different Tannoy models from different time frame? I have listened to vintage GRF with monitor red drive unit and it sounds pretty good. I also listen to the c .......
4: Speaker Asylum, Seeking comments about Tannoy Canterbury and York (0.00)
Posted by Tubenstein on 2024-01-05, 03:03:46 (45.64.242.157)
Both are 15 Inches, any thoughts? What is pros and cons of each? .......
5: Tube DIY Asylum, BC Components 052 vs. CDE DCMC (0.00)
Posted by Tubenstein on 2023-08-19, 14:08:06 (202.40.157.7)
I am building a power supply for my premp. The PS circuit recommend to use BC Component 052 series, but it is very hard to source. Would I use CDE DCMC Instead? https://www.vishay.com/docs/28345/050-0 .......
6: Tube DIY Asylum, Operating Point of 6H30? (0.00)
Posted by Tubenstein on 2023-08-16, 04:35:56 (175.159.220.35)
Between 100v @30mA and 80v @40mA, which one is the ideal operating point of 6H30? .......
7: High Efficiency Speaker Asylum, Supravox Charge Jensen (0.00)
Posted by Tubenstein on 2023-07-25, 15:38:45 (45.64.242.161)
Who has built any of these speakers? Which is the finest among? What is the sensitivity? .......
8: High Efficiency Speaker Asylum, TW Horn vs. Onken (0.00)
Posted by Tubenstein on 2023-07-25, 11:20:09 (49.130.130.145)
What are the differences between TW horn and Onken type? Are they the same? If not, what are their pros and cons? .......
9: Speaker Asylum, Different Slopes (0.00)
Posted by Tubenstein on 2023-07-05, 01:55:06 (45.64.242.167)
Hello! I want to setup the subwoofer / satellite system and crossover at 100Hz. Regarding of the slope selection, what are the differences between 12dB and 24dB? Thanks! .......
10: Speaker Asylum, RE: I'd ask Gradient Labs or details on "why"... (0.00)
Posted by Tubenstein on 2023-07-04, 03:59:55 (45.64.243.216)
Why dipole bass crossover at 200Hz sounds smoother? Is monopole no good on that frequency range? .......
11: Speaker Asylum, RE: I'd ask Gradient Labs or details on "why"... (0.00)
Posted by Tubenstein on 2023-07-04, 03:57:09 (45.64.243.216)
Why dipole bass crossover at 200Hz sounds smoother? .......
12: Speaker Asylum, What about dipole or Ripole bass? (0.00)
Posted by Tubenstein on 2023-07-01, 00:08:22 (49.130.129.74)
However dipole or Ripole bass can be crossover at much higher frequency, more than 80Hz in most cases. Is dipole or Ripole bass doesn't have this issue? .......
13: Speaker Asylum, Digital EQ / Correction for locailization ? (0.00)
Posted by Tubenstein on 2023-06-30, 11:38:11 (45.64.241.189)
When adding subwoofer and crossover over 80Hz, it'll have locailization issue. Shouldn't digital EQ / correction, such as Dirac or similar able to overcome the issue? Thanks! .......
14: Speaker Asylum, Crossover more than 80Hz with dipole bass (0.00)
Posted by Tubenstein on 2023-06-28, 03:36:22 (45.64.243.201)
Gradient labs recommended to have their dipole bass crossover at 200Hz while mating with conventional Loudspeaker and electrostatic is another story, 110Hz they recommended. Some inmates suggest cross .......
15: Planar Speaker Asylum, Quad ESL-57 plus (Swarm) subwoofer with high pass (0.00)
Posted by Tubenstein on 2023-06-26, 18:51:19 (175.159.216.81)
What do you think of adding subwoofer to Quad ESL-57 and crossover at 80Hz @12db for high pass? And the subwoofer would be in Swarm configuration crossover at 80Hz @ 24db for low pass. The upcoming NA .......
16: Speaker Asylum, Sure thanks! (nt) (0.00)
Posted by Tubenstein on 2023-06-25, 18:44:55 (119.236.200.47)
. .......
17: Speaker Asylum, RE: Swarm Subwoofer (0.00)
Posted by Tubenstein on 2023-06-25, 18:40:49 (119.236.200.47)
So cannot use active subwoofer as it ends up all four sib has its own amplication. Second, would Swarm configuration overcome the locailixation issue while crossover >80Hz? .......
18: Speaker Asylum, Swarm Subwoofer (0.00)
Posted by Tubenstein on 2023-06-25, 15:08:08 (119.236.200.47)
My brother has recently mentioned about Swarm Subwoofer Configuration. Sounds like it summed stereo low frequency signal into mono. Is that any drawbacks? Any comments about Swarm Subwoofer Configurat .......
19: Tube DIY Asylum, RE: Partridge design from Mercury Magnetics (0.00)
Posted by Tubenstein on 2023-06-06, 11:14:26 (116.48.85.2)
So which one is the finest Partridge pp output transformers for both 100w and 200w applications? What are their primary impedance? .......
20: Tube DIY Asylum, Partridge design from Mercury Magnetics (0.00)
Posted by Tubenstein on 2023-06-03, 20:41:16 (45.64.241.168)
Any comments about Mercury Magnetics reproduce the Partridge design?? They also offer Dyanco OPT for MKVI and some Peerless design. .......
21: Speaker Asylum, RE: Question about Linkwitz LX521 reference (0.00)
Posted by Tubenstein on 2023-05-17, 11:24:09 (49.130.130.204)
Refering to their website, the bass should go down to 20Hz, but it sounds like only capable of 30Hz range based on what j heard in a fellow system with LX521. .......
22: Speaker Asylum, Question about Linkwitz LX521 reference (0.00)
Posted by Tubenstein on 2023-05-16, 09:05:29 (49.130.129.229)
Anyone is able to tell me how much power required to drive the bass section of the Linkwitz LX521 Reference. Is 100w from benchmark AHB2 adequate? Also, what is the minimum impedance of the bass secti .......
23: Digital Drive, Any comments? (0.00)
Posted by Tubenstein on 2023-01-23, 14:42:15 (45.64.241.7)
I see a player with followings. PCM1794, LME47920for low pass filter and several OPA2604. The output stage has tube buffer. Any comments about the opamp it is using?? .......
24: Speaker Asylum, NHT C3 Carbon Fibre vs. KLH Model Five (0.00)
Posted by Tubenstein on 2022-08-04, 01:48:56 (45.64.241.199)
My friend is seeking a pair of outstanding bookshelf Loudspeaker, and narrow down to either NHT C3 Carbon fibre or KLH Model Five. Which one would you prefer for 50 to 60w push pull tube amplifcation? .......
25: K&K Audio / Lundahl Transformers, Lundahl LL1671/20mA?? (0.00)
Posted by Tubenstein on 2022-03-25, 16:35:05 (42.3.58.228)
Does Lundahl make a 20mA version for LL1671 (1:1 SE:SE)? Referring to the datasheet of LL1671, it seems they only have 30mA with 35H. Rumour has it that Lundahl does offer 20mA. If they do, what is th .......
26: Tubes Asylum, 6HV5A vs. D3a (0.00)
Posted by Tubenstein on 2022-03-24, 16:27:12 (49.130.131.6)
Hi! I know the operating voltage of both 6HV5A and D3a (wired in triode) are very different. Which one is considered more linear tube?? Thanks! .......
27: Digital Drive, TDA1541A board with balanced IV stage (0.00)
Posted by Tubenstein on 2022-01-30, 00:18:18 (175.159.216.81)
I have a vintage Philips CD player that has TDA1541A 16 bits chip. The board should have a unbalanced output. I want to add the Twisted Pear Audio I/v stage but it only has balanced input. Can I use t .......
28: Vintage Asylum, Input Impedance of Fisher 50AZ and 55A (0.00)
Posted by Tubenstein on 2021-06-15, 18:19:26 (202.40.157.165)
Hello Everyone! Anyone can tell me the input impedance of both Fisher 50AZ and Fisher 55A?? Thanks! .......
29: Tube DIY Asylum, SRPP (0.00)
Posted by Tubenstein on 2021-02-26, 05:42:57 (202.40.157.165)
Hello! I recently listened to an old linestage that is 6922 SRPP and it sounds really great! The linestage has an industrial-grade resistor but Wondercap as coupling. How much gain this linestage c .......
30: Tube DIY Asylum, RE: There is nothing to add (0.00)
Posted by Tubenstein on 2021-02-04, 21:44:31 (202.40.157.165)
The reason I do that because the new preamp I'm going to use only has XLR output and no RCA, and it is a true balanced linestage. I don't want to use XLR to RCA conversion (transformer) and transmit t .......
31: Tube DIY Asylum, RE: There is nothing to add (0.00)
Posted by Tubenstein on 2021-02-03, 17:41:38 (202.40.157.165)
Can I add a toggle switch for selecting between RCA (unbalanced) and XLR (balanced)? If I added balanced input, would it affect the performance of the Amity to a degree?? Thanks again! .......
32: Tube DIY Asylum, RE: There is nothing to add (0.00)
Posted by Tubenstein on 2021-02-03, 06:50:24 (202.40.157.165)
So it will be very easy to add an EXR and wired in balanced. thanks! .......
33: Tube DIY Asylum, XLR input for Amity (0.00)
Posted by Tubenstein on 2021-02-02, 05:37:34 (202.40.157.165)
Can I add an XLR balanced input to the Amity?? Any drawbacks?? .......
34: Tube DIY Asylum, Bartola Source replace cathode follower? (0.00)
Posted by Tubenstein on 2020-12-20, 00:30:37 (42.3.24.19)
My friend had sent me the info about Bartola Source Follower and it is able to replace all cathode follower in tube circuits. Can I replace the cathode follower of Transcendent Sound Ground Grid w .......
35: Tube DIY Asylum, RE: Tubelab vs Bartola (0.00)
Posted by Tubenstein on 2020-12-14, 09:49:36 (42.3.24.28)
do you think the tubelab power drive capable to drive the GM70 instead of 845? .......
36: Tube DIY Asylum, Tubelab vs Bartola (0.00)
Posted by Tubenstein on 2020-12-14, 08:00:31 (42.3.24.28)
Between Bartola GM70 and Tubelab 845, which one is more preferable? http://tubelab.com/designs/845-se/ https://www.bartola.co.uk/valves/2018/03/13/gm-70-se-amplifier/ .......
37: Vinyl Asylum, RE: What about this low mass tonearm? (0.00)
Posted by Tubenstein on 2020-12-05, 15:37:30 (42.3.24.28)
As linear tracking arm goes, I like the Zorin Music Reference better. .......
38: Vinyl Asylum, RE: What about this low mass tonearm? (0.00)
Posted by Tubenstein on 2020-12-05, 14:59:28 (42.3.24.28)
I have contact the mfg and they suggest the 9" version for my modified Lenco L75. It costs less than USD$800 equivalent. By looking at the pictures on their website, it is just built as good as the In .......
39: Vinyl Asylum, What about this low mass tonearm? (0.00)
Posted by Tubenstein on 2020-12-04, 22:47:37 (202.40.157.165)
Hello! I have MI cartridge in my system with compliance around 28. I'm seeking a low mass tonearm for such a high compliance. What about the Jasmine JS TA-240? Anyone has tried it?? Thanks! ::: TOPIC: .......
40: High Efficiency Speaker Asylum, Tannoy Autograph with First Watt J2 (0.00)
Posted by Tubenstein on 2020-12-01, 19:59:42 (202.40.157.165)
Hi! Anyone can tell me whether First Watt J2 able to drive Tannoy Autograph with monitor 15 gold version?? Thanks! .......
41: Digital Drive, RE: Any suggestions about replacement of Audiomeca (0.00)
Posted by Tubenstein on 2020-08-02, 10:15:58 (49.130.130.95)
I have listened to Brinkmann Nyquist MKII DAC recently, and it shares lots of similarities of the Audiomeca DAC but at a much higher level. Sadly, very expensive! .......
42: Digital Drive, What happened to Birdland Audio? (0.00)
Posted by Tubenstein on 2020-07-27, 02:51:09 (45.64.243.79)
Is Birdland Audio still in business? They used to make very good sounding DAC. .......
43: Digital Drive, RE: Anyone knows DenafripsTerminator? (0.00)
Posted by Tubenstein on 2020-07-13, 17:21:49 (45.64.240.116)
Are you using the SRPP linestage section of your Monarchy NM 24? I have listened to the NM 24 and it sounds very very good! .......
44: Digital Drive, RE: Anyone knows DenafripsTerminator? (0.00)
Posted by Tubenstein on 2020-07-13, 17:18:19 (45.64.240.116)
How you compare both Denafrips Terminator and Schitt Yggdrasil? .......
45: Hi-Rez Highway, RE: Seeking comments about electrocompaniet ECM 1 MKII (0.00)
Posted by Tubenstein on 2020-07-11, 08:31:15 (45.64.241.1)
I guess it might not be an issues for DAC or streamer. BTW the Electrocompaniet ECD2 is a very outstanding DAC compare to the very good ones. But not quite sure whether the ECM1 MKII able to meet the .......
46: Digital Drive, Anyone knows DenafripsTerminator? (0.00)
Posted by Tubenstein on 2020-07-11, 05:09:34 (223.197.217.222)
Who has heard of Denafrips Terminator? .......
47: Digital Drive, RE: Any suggestions about replacement of Audiomeca (0.00)
Posted by Tubenstein on 2020-07-11, 04:53:12 (223.197.217.222)
I wonder how come no one interested in PS Audio top of the line DAC. My friend has PS Audio DAC in his system and sounds very good indeed. .......
48: Digital Drive, RE: Any suggestions about replacement of Audiomeca (0.00)
Posted by Tubenstein on 2020-07-11, 03:54:16 (45.64.241.170)
Years ago, I have listened to the birdland audio Odéon-Pt and it is better than my audiomeca enkianthus original version without the "X" upgrade. But the birdland seems no longer in business. And very .......
49: Digital Drive, RE: Any suggestions about replacement of Audiomeca (0.00)
Posted by Tubenstein on 2020-07-10, 16:08:44 (45.64.241.118)
My friend just gives me a suggestion to try the Schiit Audio Yggdrasil DAC before spending a big bucks. .......
50: Hi-Rez Highway, Seeking comments about electrocompaniet ECM 1 MKII (0.00)
Posted by Tubenstein on 2020-07-10, 14:23:20 (45.64.241.118)
Any Electrocompaniet ECM 1 MKII owners and comments about this unit as a DAC and streamer for high resolution files? I have listened to ECD2 DAC years ago and like it a lot. How the ECM 1 MKII compare .......
51: Digital Drive, RE: Any suggestions about replacement of Audiomeca (0.00)
Posted by Tubenstein on 2020-07-10, 11:41:56 (45.64.241.118)
Which model is the finest DAC from Total DAC? Any thoughts about French made Audiomat and EERA? .......
52: Digital Drive, Any suggestions about replacement of Audiomeca (0.00)
Posted by Tubenstein on 2020-07-09, 16:11:29 (45.64.240.177)
Hello! I have the Audiomeca mephisto II.X and Enkianthus.X combo for more than eighteen years. I am seeking an upgrade. Any suggestions? Anything out there share similar Vinyl like tonality as the Aud .......
53: Speaker Asylum, RE: It has a whizzer cone, that's a fail right there. (0.00)
Posted by Tubenstein on 2019-12-06, 06:45:44 (202.40.157.165)
My friend gives me a link that is a design of Dick Olsher. But the Hawthorne Audio 15" Augies woofer is no longer available. However, Acoustic Elegance offers Dipole 15" woofer but not quite sure whet .......
54: Speaker Asylum, Scandinavian Audio Labs SAL 08C08 (0.00)
Posted by Tubenstein on 2019-12-05, 03:06:44 (202.40.157.165)
Who familiar to this drive unit?? Any suggested plan for that?? Thanks in Advance!! .......
55: Tube DIY Asylum, RE: should he choose 300b or 2a3 when using the triode/load line calculator? (0.00)
Posted by Tubenstein on 2019-10-19, 07:53:56 (202.40.157.165)
I decided to use JJ 300B instead of 2A3-40 due to both are the same tube with slightly differences. .......
56: K&K Audio / Lundahl Transformers, LL1620 Amorphous with Air Gap for PP (0.00)
Posted by Tubenstein on 2019-10-19, 06:42:23 (202.40.157.165)
Hello! Is the LL1620 the best choice for the Amity circuit? Does it available in Amorphous Core with Air gap as the circuit recommended?? Thanks! .......
57: Tube DIY Asylum, Operating Point for JJ 2A3-40 (0.00)
Posted by Tubenstein on 2019-10-18, 06:54:07 (202.40.157.165)
Hello! I want to use JJ 2A3-40 instead of 320B-XLS and conventional 2A3 for the Amity project. What is your suggested operating point of JJ 2A3-40 in deep class A for the Amity and the loaded impedanc .......
58: Speaker Asylum, RE: Lake LM-44 for Linkwitz LX521 (0.00)
Posted by Tubenstein on 2019-07-07, 03:34:05 (182.239.88.173)
We all audiophile looking for good sounds and getting better. It's just a hobby and don't take it too serious. Be nice to others. I think the moderator of the forum will agree with me. You are not the .......
59: Speaker Asylum, RE: Lake LM-44 for Linkwitz LX521 (0.00)
Posted by Tubenstein on 2019-07-06, 10:02:41 (182.239.117.172)
Everybody has rights to seek something better, right? So be gentle! .......
60: Tube DIY Asylum, RE: Can you find that power transformer? (0.00)
Posted by Tubenstein on 2019-05-17, 23:35:45 (202.40.157.165)
I know few places able to custom wound it .......
61: Tube DIY Asylum, Electraprint DRD 300B (0.00)
Posted by Tubenstein on 2019-05-17, 19:00:37 (202.40.157.165)
Hello! I end up decided to build the Electraprint DRD 300B. Few questions for you guys. 1) Refer to the website, the output power is over 10W. As I will use OPT with 5K instead of 3.5K, how much outpu .......
62: Tubes Asylum, RE: You can, but you really should not (0.00)
Posted by Tubenstein on 2019-05-17, 18:55:05 (202.40.157.165)
So shouldn't use carbon resistor for both R37, R39 and R41. What about vishay TX2575?? Can I use one single 1.5K Vishay TX2575 instead of 2 x 750K for R33 and R34?? What about 1M tantalum resistor for .......
63: Tube DIY Asylum, RE: DRD 300B power supply (0.00)
Posted by Tubenstein on 2019-05-15, 01:11:15 (202.40.157.165)
Hello! I might consider to build this circuit with stacked power supply instead. Should I regulate with 21 century Maida all the way?? Max current is 800mA and capable max 525v as long as I have a .......
64: Tube DIY Asylum, DRD 300B power supply (0.00)
Posted by Tubenstein on 2019-05-13, 08:31:39 (202.40.157.165)
Which power supply would you recommend for the DRD 300B? - Tube rectification plus very low DCR choke OR - SS rectification plus Maida regulator .......
65: K&K Audio / Lundahl Transformers, RE: Power Supply for DRD (0.00)
Posted by Tubenstein on 2019-05-13, 04:37:31 (182.239.89.74)
What is the rating of capacitor in this kit? .......
66: K&K Audio / Lundahl Transformers, Power Supply for DRD (0.00)
Posted by Tubenstein on 2019-05-12, 06:24:54 (202.40.157.165)
Whether your Tube Amplifier Power Supply Kits suitable for this project?? Which Lundahl LC choke would you recommended? The plate choke for the driver stage is 75H, any suggestion?? .......
67: Tubes Asylum, RE: Resistors for Sonic Frontiers SFL-1 (0.00)
Posted by Tubenstein on 2019-05-04, 22:38:06 (202.40.157.165)
Why not Mills everywhere in the circuit?? I guess it would be musical. .......
68: Tubes Asylum, Resistors for Sonic Frontiers SFL-1 (0.00)
Posted by Tubenstein on 2019-05-04, 01:01:04 (202.40.157.165)
Hello! Can I put non inductive wirewound resistor for the following positions on the circuit diagram of SFL-1?? R37, R39, 46, R43 and R44 Thanks! .......
69: Vinyl Asylum, Pulley for Linn and Rega (0.00)
Posted by Tubenstein on 2019-01-20, 10:31:08 (202.40.157.165)
Are pulley for Linn LP12 and Rega interchangeable?? I have both TT now, and the motor on Rega doesn't work, so I want to mount transform the one from Linn to Rega as both have premotec 9904 111 31813 .......
70: Vinyl Asylum, RE: What is the physical size of Origin Live DC motor?? (0.00)
Posted by Tubenstein on 2019-01-19, 04:19:32 (202.40.157.165)
I found it 46mm! Thanks! .......
71: Vinyl Asylum, What is the physical size of Origin Live DC motor?? (0.00)
Posted by Tubenstein on 2019-01-19, 01:49:48 (202.40.157.165)
Hello! I want to upgrade the stock AC motor on my TT to Origin Live DC motor, and would like to find out the physical size of both Orgin Live DC100 and DC200. What is the length of each motor excludin .......
72: Vinyl Asylum, Which Bearing Sleeve for Rega? (0.00)
Posted by Tubenstein on 2019-01-17, 05:57:33 (202.40.157.165)
Hello! What are their differences between 2 bearing sleeve for Rega TT upgrade?? Which one is higher quality?? Almost the same price. https://www.ebay.com/itm/ISOKINETIK-PEEK-CERAMIC-BEARING-SLEEVE-UP .......
73: Vinyl Asylum, RE: Rega 24v motor upgrade kit?? (0.00)
Posted by Tubenstein on 2019-01-17, 05:54:12 (202.40.157.165)
Fair enough! Many thanks! .......
74: Vinyl Asylum, Rega 24v motor upgrade kit?? (0.00)
Posted by Tubenstein on 2019-01-17, 05:32:29 (202.40.157.165)
Hello! Is the Rega 24v motor upgrade kit the same motor use on their RP10?? Rumors has it that the one on the RP10 is noisy. Any thoughts?? Thanks! .......
75: Tube DIY Asylum, Plate load resistors and B+ voltage (0.00)
Posted by Tubenstein on 2018-11-03, 19:21:28 (202.40.157.7)
The circuit supposed to use 19.6K and only have 20K on hand. If using 20K instead of 19.6K, can I adjust the B+ voltage on the regulator for compensation? .......
76: Tube DIY Asylum, RE: Need Advice (0.00)
Posted by Tubenstein on 2018-03-16, 01:25:21 (175.159.220.34)
Even I use the Bartola source follower with 6GK5 (300H choke loaded), the circuit still need the negative supply, right? .......
77: Tube DIY Asylum, Need Advice (0.00)
Posted by Tubenstein on 2018-03-15, 18:57:37 (175.159.220.34)
Hello! My friend has sent me the links about GM70 driver with gyrator and source follower. http://www.bartola.co.uk/valves/2017/06/04/6sf5-driver-for-300bgm70813-se-amps/ https://i2.wp.com/www.bar .......
78: Amp/Preamp Asylum, Questions for Hafler XL600 (0.00)
Posted by Tubenstein on 2018-03-02, 08:19:59 (182.239.90.192)
Hello! How many pairs of 2SK176 / 2SJ56 for the output of XL600? Thanks! .......
79: SET Asylum, Silk Transformer (0.00)
Posted by Tubenstein on 2017-10-27, 05:14:57 (202.40.157.7)
Anyone has tried the silk transformer with 211 output tubes?? What's your comment? .......
80: High Efficiency Speaker Asylum, RE: Audio Nirvana Classic 15 alnico (0.00)
Posted by Tubenstein on 2017-08-22, 18:46:19 (219.76.15.1)
What about this one? .......
81: High Efficiency Speaker Asylum, Audio Nirvana Classic 15 alnico (0.00)
Posted by Tubenstein on 2017-08-21, 17:56:57 (219.76.15.4)
Hello! This is the plan supposed for Jensen horn speaker with G610. What do you think Audio Nirvana Classic 15 alnico with this cabinet? .......
82: High Efficiency Speaker Asylum, Jubilee folded horn (0.00)
Posted by Tubenstein on 2017-08-16, 05:07:10 (112.120.26.96)
Refer to eBay listing, this is based on theklipsxhorn with two twelve inches instead of one fifteen inches. How it compare with Inlow spiral bass horn for the range between 50 and 300 cycle? ::: TOPIC .......
83: High Efficiency Speaker Asylum, RE: Box wood.. (0.00)
Posted by Tubenstein on 2017-08-04, 09:43:55 (182.239.87.164)
How come no one consider to have aerolam instead of plywood as chamber? It should have least resonance compare with others in a folded horn system? And we can have either bamboo or Delrin or combined .......
84: High Efficiency Speaker Asylum, RE: Box wood.. (0.00)
Posted by Tubenstein on 2017-08-02, 20:20:12 (182.239.87.115)
What about the enclosure for bass horn section made of plywood and all transmission of the folded bass horn based on Delrin for least resonance? .......
85: High Efficiency Speaker Asylum, Cerwin Vega CLS 215 vs XLS 215 (0.00)
Posted by Tubenstein on 2017-07-05, 13:47:50 (202.40.157.7)
What are the major differences between the two? Whether either speaker driven by 20W tube amplifier?? .......
86: General Asylum, RE: Yes... (0.00)
Posted by Tubenstein on 2017-07-04, 13:12:31 (58.152.26.14)
Hello! I have 100w amps on the speakers. Assume adding the subwoofer with 95hz cutoff, I would like to give 35w push pull amp a try. I want to see the possibility The subwoofer I want to try is Bag En .......
87: General Asylum, Efficiency of main speakers with subwoofer (0.00)
Posted by Tubenstein on 2017-07-04, 10:16:35 (58.152.26.14)
Since adding subwoofers to the system, it might require to roll off the low end of the main speaker (example high pass filter at 95hz), this means the main speaker is no longer needed to responsible u .......
88: Analog Engineering Associates, RE: Welcome to the Asylum. What a great legacy you have ... (0.00)
Posted by Tubenstein on 2017-06-27, 12:13:54 (58.152.26.217)
Are you able to refurbish turntable by ultrasonic cleaning?? Thanks! .......
89: Planar Speaker Asylum, RE: Nwer Quads are Made in China.. For some folks this matters.. nt (0.00)
Posted by Tubenstein on 2017-06-21, 12:11:00 (202.40.157.7)
What is the sonic differences between 2912 and 2812?? .......
90: Planar Speaker Asylum, RE: Nwer Quads are Made in China.. For some folks this matters.. nt (0.00)
Posted by Tubenstein on 2017-06-21, 12:10:03 (202.40.157.7)
For curiosity, do you have sound output for ESL 57 with Gradient woofer crossover at 150Hz? I think it should a bit more than 100dB, right?? .......
91: Planar Speaker Asylum, RE: Nwer Quads are Made in China.. For some folks this matters.. nt (0.00)
Posted by Tubenstein on 2017-06-20, 20:50:20 (182.239.90.69)
I've listened to my friend system several years ago and he has latest Gradient dipole woofer setup at 150hz with Quad ESL 57 Yes, I agree it sounds louder with protection circuit built in, especially .......
92: Planar Speaker Asylum, Quad ESL 2912 vs. ESL 57 (0.00)
Posted by Tubenstein on 2017-06-16, 14:09:59 (58.152.26.217)
What are your comments between ESL 2912 and ESL 57? .......
93: Tube DIY Asylum, RE: Solution , possible, workable (0.00)
Posted by Tubenstein on 2017-03-14, 09:53:35 (202.40.157.7)
Thank you very much Jeff!! .......
94: Tube DIY Asylum, SPLine?? What is this? (0.00)
Posted by Tubenstein on 2017-03-13, 08:51:28 (202.40.157.7)
What is this? Anyone build one?? .......
95: Tube DIY Asylum, RE: Here is the thing: Avoid gilding a dandelion. (0.00)
Posted by Tubenstein on 2017-03-13, 08:38:38 (202.40.157.7)
I agree with you most part, however, this is necessary to have a fully balanced linestage like the SFL-2. I listened to a system that has Lynn Olson Amity abd the SFL-2 drive it perfectly as this a .......
96: K&K Audio / Lundahl Transformers, RE: Two Terminal Constant Current Source (0.00)
Posted by Tubenstein on 2017-03-12, 23:37:56 (219.76.15.6)
I know people owns this preamp but hate the sound of vishay resistor for the position, but good sounding resistor olike tantalum only available in 430R. This is the reason i want to suggest trying you .......
97: Tube DIY Asylum, RE: resistors value (0.00)
Posted by Tubenstein on 2017-03-12, 10:47:34 (202.40.157.7)
I think part of the reason not putting CCS in the second stage because of the costs of production. The SFL-2 almost a bargain price back in the 90s' for what they offered back in the day. Personal I l .......
98: Tube DIY Asylum, resistors value (0.00)
Posted by Tubenstein on 2017-03-12, 05:42:00 (202.40.157.7)
It draws my attention about this post. Whether this is possible to have 1M instead of 975K and 430R instead of 422R? Quality resistors won't come with those weird bvalue like 975K and 422R. http://www .......
99: K&K Audio / Lundahl Transformers, RE: Two Terminal Constant Current Source (0.00)
Posted by Tubenstein on 2017-03-12, 00:25:18 (202.125.234.15)
I am curious the possibility to replace those 422r resistors with your compact ccs? .......
100: Tube DIY Asylum, RE: Transformer ratio?? (0.00)
Posted by Tubenstein on 2017-03-10, 20:59:21 (219.76.15.4)
What about the primary impedance of such a line output transformer? .......
101: Tube DIY Asylum, the circuit (0.00)
Posted by Tubenstein on 2017-03-10, 06:00:24 (202.40.157.7)
Here you go .......
102: Tube DIY Asylum, Transformer ratio?? (0.00)
Posted by Tubenstein on 2017-03-10, 05:59:37 (202.40.157.7)
My friend sent me this circuit and looks very simple. 200v B+ seems a bit low, right? What is the transformer ratio would work for this circuit?? .......
103: Tube DIY Asylum, RE: Question about ac to dc (0.00)
Posted by Tubenstein on 2017-03-08, 23:18:00 (202.40.157.7)
If I have a power transformer that is 225vac @0.15A and the B+ voltage of the audio circuit is 255vdc, is this transformer adequate for the appplication? 225vac 0.15 (239.8v at N/L) => Schottky Diode .......
104: Tube DIY Asylum, DCR of plate choke (0.00)
Posted by Tubenstein on 2017-03-08, 21:34:12 (202.40.157.7)
Hello! Let's say I want to replace the plate load resistor with plate choke. Assume the plate resistor is 1.96K, should I have the DCR of the plate choke make for 1.96K? Someone told me that a reactor .......
105: Tube DIY Asylum, RE: Choke loaded CF (0.00)
Posted by Tubenstein on 2017-03-08, 03:40:11 (202.40.157.7)
My friend has just brought up this circuit, I guess this is a Conrad Johnson ART. Instead of having so many resistors 10 x 19.6K 1W (1.96K 20W). Why not custom wound one single plate choke to handl .......
106: Tube DIY Asylum, RE: Question about ac to dc (0.00)
Posted by Tubenstein on 2017-03-08, 01:07:57 (202.40.157.7)
If the secondary winding is 160vac @225mA instead of 170vac, it should be no problem to supply 230vdc after solid state rectification, right? .......
107: Tube DIY Asylum, Question about ac to dc (0.00)
Posted by Tubenstein on 2017-03-07, 23:21:50 (202.40.157.7)
Hello! My transformer on secondary winding is 170vac. I'm using solid state rectifier, how much dc voltage after the rectification?? Ballpark figure is fine. I need at least 200v after rectification? .......
108: Tube DIY Asylum, RE: Choke loaded CF (0.00)
Posted by Tubenstein on 2017-03-07, 06:21:43 (182.239.74.254)
What about lundahl ll1667? .......
109: Tube DIY Asylum, Choke loaded CF (0.00)
Posted by Tubenstein on 2017-03-07, 03:12:16 (202.40.157.7)
I have 6GK5 as CF, and now the resistor value is 19.6K, what value of plate choke should I use to replace the 19.6K resistor? Thanks! .......
110: General Asylum, Cree Sic MOSFET (0.00)
Posted by Tubenstein on 2017-03-01, 08:28:06 (202.40.157.7)
I know Cree has offering some really good Sic MOSFET, do they have anything that is able to replace the IRF730?? .......
111: Tube DIY Asylum, Plate choke current capability (0.00)
Posted by Tubenstein on 2017-01-10, 13:28:30 (202.83.241.101)
Hello! If I runs a big triode, let's say 1100v @80mA.Now I have a plate choke for parallel feed output configuration and the specification indicates its current capability is 80mA. Do you think the ch .......
112: Tubes Asylum, RE: Current of LS5 MKIII (0.00)
Posted by Tubenstein on 2016-12-03, 15:43:36 (202.83.241.101)
Dear Mike, Can we have a separate regulator for the first/second stages and output stage? This means one regulator for the first/second stage and other regulator handle the output stage PER CHANNEL. .......
113: Tubes Asylum, RE: Current of LS5 MKIII (0.00)
Posted by Tubenstein on 2016-12-03, 13:30:59 (202.83.241.101)
Tre' What about the B+ voltage? Is 179v B+ correct? Also, do you suggest to use 2 separate regulator per channel? One for the first and second stage (2 x 6922 altogether), and the other regulator for .......
114: Tubes Asylum, Current of LS5 MKIII (0.00)
Posted by Tubenstein on 2016-12-03, 11:32:31 (202.83.241.101)
Hello! I'm helping my cousin for the ARC LS5 MKIII project and want to find out how much current of those 4 x 6922 (per channel) drawing in total at 179v B+? Thanks! .......
115: Tubes Asylum, RE: You will be better off using those chokes as a plate load in a parafeed amp (0.00)
Posted by Tubenstein on 2016-12-02, 04:25:52 (202.83.241.101)
Hello Tre'! Can I use 600v rating for the C1 (20uf) and 200v rating cap for both C2 (600uf) as well as C3 (1800uf)?? Thanks! .......
116: Tubes Asylum, RE: You will be better off using those chokes as a plate load in a parafeed amp (0.00)
Posted by Tubenstein on 2016-12-01, 06:26:53 (202.83.241.101)
What about this one? .......
117: Tubes Asylum, RE: You will be better off using those chokes as a plate load in a parafeed amp (0.00)
Posted by Tubenstein on 2016-12-01, 04:21:37 (202.83.241.101)
What makes it terrible? How about? 225v @70mA power transformer => Full wave bridge with Schottkys => 16H 12ohm LC choke => 50uf => 16H 12 ohm choke => 100uf => 105+v?? .......
118: Tubes Asylum, RE: Question about power transformer specification (0.00)
Posted by Tubenstein on 2016-11-30, 11:59:51 (202.83.241.101)
I understand what you meant as I already had those 16H chokes and each weighted around 10 pounds! All custom wound by Bartolucci for a fellow I know, and now he wants to sell all those parts as those .......
119: Tubes Asylum, RE: What type of rectifier are you using? (n/t) (0.00)
Posted by Tubenstein on 2016-11-30, 07:41:47 (202.83.241.101)
As the diagram shown, it has 2 x 6D22S as full wave rectification. .......
120: Tubes Asylum, Question about power transformer specification (0.00)
Posted by Tubenstein on 2016-11-29, 15:50:02 (202.83.241.101)
Whether power transformer 225v @70mA with 1-4ohm dcr suitable to the attached diagram? .......
121: Vinyl Asylum, What about brass instead of titanium? (NT) (0.00)
Posted by Tubenstein on 2016-10-18, 08:18:29 (202.83.241.101)
. .......
122: Vinyl Asylum, What is the dimension? (0.00)
Posted by Tubenstein on 2016-10-18, 08:15:56 (202.83.241.101)
Hello! My friend has sent me this diagram that is Lenco L75 platter, can anyone tell me the dimension (dimension x height x thickness) based on the attached diagram?? Thanks! .......
123: Vinyl Asylum, Titanium Platter (0.00)
Posted by Tubenstein on 2016-10-16, 14:07:16 (202.83.241.101)
Hello! My fiend want to custom made a platter in titanium for his turntable. What are the differences between grade 1 and grade 2 of titanium?? Thanks! .......
124: Vinyl Asylum, RE: SME 312 vs M12-12R (0.00)
Posted by Tubenstein on 2016-10-01, 07:31:43 (202.83.241.101)
So the M2-12R should be a good substitution for 3012R, not both 312 and SME IV. .......
125: Vinyl Asylum, SME 312 vs M12-12R (0.00)
Posted by Tubenstein on 2016-09-30, 06:22:09 (202.83.241.101)
Hello! Between SME 312 and M12-12R, which one work the best with Ortofon SPU? I know the SME V-12 not made for high mass cartridge like the SPU. Please comment. Thanks! .......
126: Planar Speaker Asylum, Clone Wharfedale SFB (0.00)
Posted by Tubenstein on 2016-06-09, 11:25:40 (202.83.241.101)
What do you think? Anyone has tried to built one like this? .......
127: Tube DIY Asylum, RE: Power Transformer Rating (0.00)
Posted by Tubenstein on 2016-05-22, 10:27:16 (101.78.181.154)
So the DC voltage still 260v after the LC choke, right? .......
128: Tube DIY Asylum, RE: Power Transformer Rating (0.00)
Posted by Tubenstein on 2016-05-22, 07:41:40 (101.78.181.154)
I want to build another power supply to compare how it sounds. Like this: 600vct @100mA => 6D22S => 16H 11.2 ohm LC Choke => 5000uf => 5W RESISTOR => 5000uf => 2W RESISTOR => 5000uf => 180vdc Would yo .......
129: Tube DIY Asylum, RE: Power Transformer Rating (0.00)
Posted by Tubenstein on 2016-05-22, 01:27:57 (101.78.181.154)
How about this one? 600vct @100mA => 6CJ3 (2 for full wave) => 16H 11.2 ohm LC Choke => 200uf => K&K Audio HV regulator => 200vdc Is that ok? Can you determine the DCR of the power transformer (600vct .......
130: Tube DIY Asylum, RE: Power Transformer Rating (0.00)
Posted by Tubenstein on 2016-05-21, 15:16:33 (101.78.181.154)
My target is 200vdc, sounds like the 300vct @100mA is more adequate, right? How about this one? 300vct @100mA => 6D22S (2 for full wave) => 16H 11.2 ohm LC Choke => 200uf => 200vdc Thanks! ::: TOPIC: .......
131: Tube DIY Asylum, Power Transformer Rating (0.00)
Posted by Tubenstein on 2016-05-20, 02:58:44 (101.78.181.154)
Hello! Which one is more adequate for following? 650vct @100mA or 300vct @100mA? Power transformer => 2 x 6D22S (full wave rectification) => LC Choke (16H 11.2 ohm DCR) => 100uf => Choke (40H 100 ohm .......
132: Tube DIY Asylum, RE: 813 in triode (0.00)
Posted by Tubenstein on 2016-05-16, 05:56:29 (202.83.241.101)
Since the 813 is a pentode, it can be using AC for filament supply with AC balance adjustment instead of those "heavy duty" filtering for DHT, right? .......
133: Tube DIY Asylum, RE: ratio for interstage (0.00)
Posted by Tubenstein on 2016-05-15, 05:23:01 (202.83.241.101)
Sorry for misleading you! Actually what I want to ask whether 5K or 3K load is what the 6EM7 loves to see. Thanks! .......
134: Tube DIY Asylum, ratio for interstage (0.00)
Posted by Tubenstein on 2016-05-14, 13:06:16 (202.83.241.101)
Assume the driver tube is 6EM7, which turn ratio of interstage is more adequate to use? 3K:3K or 5K:5K?? Thanks! .......
135: Tube DIY Asylum, RE: 813 in triode (0.00)
Posted by Tubenstein on 2016-05-10, 08:48:29 (202.83.241.101)
I found this link, what do you guys think?? D3a IT coupled. .......
136: Tube DIY Asylum, 813 in triode (0.00)
Posted by Tubenstein on 2016-05-09, 23:45:52 (219.76.19.71)
Anyone has experience with 813 wired in triode for SE and operating at high voltage >1000v? Thanks! .......
137: Tube DIY Asylum, Question about Power Supply (0.00)
Posted by Tubenstein on 2016-05-08, 13:28:48 (202.83.241.101)
How can I change the dc voltage from 150v to 180v? The circuit is bias at 180v 20ma and this supply should be adequate, right? .......
138: Tube DIY Asylum, Conventional Power Supply vs Stacked PS (0.00)
Posted by Tubenstein on 2016-05-03, 14:41:43 (202.83.241.101)
Would it be possible to use conventional power supply instead of stacked power supply? If not, can this stacked power supply change to tube rectification rather than ss type? If the B+ voltage increa .......
139: Tubes Asylum, Diode Bridge?? (0.00)
Posted by Tubenstein on 2016-05-03, 06:01:57 (202.83.241.101)
My friend has sent me this diagram and looks very interesting. What made those diode bridge over the conventional? Also, those 220uf 500 not wired in series, right?? What change is required if raise t .......
140: Tube DIY Asylum, RE: Looks pretty normal. (0.00)
Posted by Tubenstein on 2016-05-02, 01:35:09 (101.78.181.154)
I have a question for you. If I want to retain the original arrangement except increase the B+ winding from 2 x 340v to 2 x 450v, in case I have a capacitor that is 110uf @1600v, so no needed to have .......
141: Tube DIY Asylum, RE: Stacked Power Supply (0.00)
Posted by Tubenstein on 2016-05-01, 03:18:15 (101.78.181.154)
What about the stacked power supply from this circuit? Does it require a special power transformer? .......
142: Tube DIY Asylum, Stacked Power Supply (0.00)
Posted by Tubenstein on 2016-04-29, 20:17:04 (101.78.181.154)
Whether stacked power supply required specially wound power transformer?? .......
143: Tube DIY Asylum, RE: MQ-70 driver for 4 pairs 300B PP?? (0.00)
Posted by Tubenstein on 2016-04-23, 14:59:32 (202.83.241.101)
Hi! 8 x 300b in push pull per monoblock. Whether the Luxman MQ70 driver (12AX7 / 6AQ8) able to drive 8 of them?? Thx!! .......
144: Tube DIY Asylum, MQ-70 driver for 4 pairs 300B PP?? (0.00)
Posted by Tubenstein on 2016-04-23, 08:03:03 (202.83.241.101)
Hello! Can we adopt MQ-70 driver stage for 4 pairs 300B in push pull (B+ 400v @80ma for each tube)? .......
145: Tube DIY Asylum, RE: Question about loaded impedance of PP OPT (0.00)
Posted by Tubenstein on 2016-04-22, 08:30:44 (202.83.241.101)
Sorry, the B+ should be 400v. How much power should be for those 8 x 300B in PP if loaded to OPT with primary of 4K?? Thanks! .......
146: Tube DIY Asylum, RE: Question about loaded impedance of PP OPT (0.00)
Posted by Tubenstein on 2016-04-21, 10:27:18 (202.83.241.101)
Let's say operating each 300B at 80ma for class A, and 8 of them in push pull are load to 5K push pull OPT, how much power can we get? .......
147: Tube DIY Asylum, RE: Yes.... why 12AX7? (0.00)
Posted by Tubenstein on 2016-04-21, 07:48:40 (202.83.241.101)
Whether using 12AX7 and 6AQ8 as driver tubes would be perfectly driving 8 x 300B? .......
148: Tube DIY Asylum, Question about loaded impedance of PP OPT (0.00)
Posted by Tubenstein on 2016-04-21, 07:06:15 (202.83.241.101)
Assume I have 8 x 300B operating in class A for push pull configuration (4 for each phase), what is the recommended loaded impedance for the OPT? .......
149: K&K Audio / Lundahl Transformers, UTC replacement (0.00)
Posted by Tubenstein on 2016-04-19, 15:14:30 (202.83.241.101)
Do Lundhal offer any replacement for the following UTC transformer for direct substitution? -- LS10X -- LS25 -- LS56 .......
150: Tube DIY Asylum, Dynaco A451 for 300B PP? (0.00)
Posted by Tubenstein on 2016-04-17, 15:15:24 (202.83.241.101)
Any comment by using Dynaco A451 output transformer for 300B PP?? .......
151: Tube DIY Asylum, RE: Yes.... why 12AX7? (0.00)
Posted by Tubenstein on 2016-04-17, 12:48:37 (202.83.241.101)
Exactly!! I have got tons of 6AQ8 recently and have some JJ ECC83 as well. I know someone has a RC coupled 300B pp amp that has both tubes in the driver and sounds wonderful!! .......
152: Tube DIY Asylum, 300B push pull inquiry (0.00)
Posted by Tubenstein on 2016-04-16, 14:45:50 (202.83.241.101)
Hello! Anyone has the circuit by using 12AX7 and 6AQ8 as drier stage for 300B push pull to share? Thanks! .......
153: K&K Audio / Lundahl Transformers, RE: Interstage transformer GM70 amplifier (0.00)
Posted by Tubenstein on 2016-03-19, 02:53:38 (202.83.241.113)
Any AMPPZ (amorphous parallel feed) transformer from Lundahl made for 30-50W Power Range and primary impedance is a must? .......
154: K&K Audio / Lundahl Transformers, RE: Interstage transformer GM70 amplifier (0.00)
Posted by Tubenstein on 2016-03-18, 08:32:07 (101.78.181.154)
Let put in this way, whether Lundahl has made a version of LL9202AMPPZ with 5K primary? thx! .......
155: K&K Audio / Lundahl Transformers, RE: Interstage transformer GM70 amplifier (0.00)
Posted by Tubenstein on 2016-03-17, 16:12:21 (202.83.241.101)
BTW, do you have SE output transformer for parallel feed application with 5K primary? The output tubes would be KR-300BXLS. Thanks! .......
156: Tube DIY Asylum, RE: you need some inductance (0.00)
Posted by Tubenstein on 2016-03-16, 06:34:59 (202.83.241.101)
The D3a only capable around 20W in Ciuffoli DC coupled design if raising the B+ for GM70 to 1200v @90ma. We have thought of this approach to build mine couple years ago, and have the power drive with .......
157: Tube DIY Asylum, RE: you need some inductance (0.00)
Posted by Tubenstein on 2016-03-16, 04:16:23 (202.83.241.113)
Hmm....What about a good quality step down input transformer before the driver tube to lower the gain? Or have a very low gain preamp such as 26 type to drive it? .......
158: Tube DIY Asylum, RE: Circuit for GM70 (0.00)
Posted by Tubenstein on 2016-03-14, 08:03:56 (101.78.181.154)
Since the Ciuffoli design is a integrated amplifier approach, can I convert the amplifier into a standalone amp with GM70 by putting a 3:1 or 4:1 interstage transformer? especially the GM70 is conside .......
159: K&K Audio / Lundahl Transformers, Interstage transformer GM70 amplifier (0.00)
Posted by Tubenstein on 2016-03-14, 04:33:55 (101.78.181.154)
Hello! This is an integrated amp for 845 but want to have GM70 instead, and intend to convert to standalone amplifier by replacing with higher step down ratio interstage transformer rather than 2:1 as .......
160: Tube DIY Asylum, Circuit for GM70 (0.00)
Posted by Tubenstein on 2016-03-14, 04:26:12 (101.78.181.154)
Hello! What change is necessary by using GM70 instead of 845 for the following circuit? The B+ will be 1200v @ 90ma for the GM70. Thanks! .......
161: Tube DIY Asylum, RE: Cap Voltage Rating? (0.00)
Posted by Tubenstein on 2016-03-07, 14:01:13 (202.83.241.101)
What about capacitor with 630vdc rating? .......
162: Dynaco-Doctor Forum, QPSA7 for PAS (0.00)
Posted by Tubenstein on 2016-02-17, 17:29:01 (219.79.235.146)
Hello! What improvement would it be if adding QPSA7 for the PAS in terms of sound? Thanks! .......
163: Tube DIY Asylum, RE: Cap Voltage Rating? (0.00)
Posted by Tubenstein on 2016-02-16, 07:49:09 (219.79.235.204)
Sorry here is the circuit. .......
164: Tube DIY Asylum, RE: Cap Voltage Rating? (0.00)
Posted by Tubenstein on 2016-02-16, 07:47:40 (219.79.235.204)
Can we still have 720vct with this EF86/EL84 regulator circuit? 720vct => Schottky => 50uf 1200v => EF86/EL84 regulator => 410vdc Any comments? .......
165: K&K Audio / Lundahl Transformers, Power Supply mod (0.00)
Posted by Tubenstein on 2016-02-15, 20:41:47 (219.79.235.204)
Hello! We want to modify the given power supply by using your Shunt Regulator to replace on the diagram as well as full wave rectification. Such as 720vct => Cree Schottly => cap (how big) => K&K shun .......
166: Tube DIY Asylum, Cap Voltage Rating? (0.00)
Posted by Tubenstein on 2016-02-15, 20:11:31 (219.79.235.204)
Hello! Regardless of regulator section on the circuit diagram, can I have full wave rectification and then feed one single 550v cap instead of wired 2 x 220uf 350v cap in series? Like this: 720vct .......
167: Tube DIY Asylum, ECC99 with transformer (0.00)
Posted by Tubenstein on 2016-01-29, 17:36:03 (219.79.187.240)
My friend has shared this circuit with me recently. What type of transformer (primary impedance) the circuit really needs? .......
168: Tube DIY Asylum, RE: Question about 0B3 (0.00)
Posted by Tubenstein on 2016-01-29, 15:31:57 (219.79.187.240)
My friend is seeking a VR tube combo for 300v @20ma regulation. Any suggestion? .......
169: Tube DIY Asylum, Question about 0B3 (0.00)
Posted by Tubenstein on 2016-01-29, 09:37:22 (219.79.187.46)
Hello! If I wired either 2 x 0B3 in series or parallel, what is the regulated voltage and current capability under both scenarios? Thanks! .......
170: Tube DIY Asylum, RE: 417A linestage (0.00)
Posted by Tubenstein on 2016-01-29, 09:19:59 (219.79.187.46)
Dave, I'v3e seen people build with one single 417A in the circuit only with 4.8K plate load and 62R cathode resistors. And the result is wonderful. I agree one single tube would be a magic piece witho .......
171: Tube DIY Asylum, RE: 417A linestage (0.00)
Posted by Tubenstein on 2016-01-23, 18:09:16 (219.73.64.5)
Dave, It might sounds crazy as we might parallel one more tube to the circuit and the outputz should be pretty low, around 600 ohm. Also, we have 41 steps attenuator and it should be fine to deal with .......
172: Tube DIY Asylum, RE: 417A linestage (0.00)
Posted by Tubenstein on 2016-01-22, 11:55:17 (219.78.188.136)
This is my friend told me: "the grid resistor is a given as this circuit will always have a volume control which becomes the grid leak, if grid leak was shown it would only be paralled to a volume con .......
173: Tube DIY Asylum, 417A linestage (0.00)
Posted by Tubenstein on 2016-01-22, 10:42:12 (219.78.188.136)
Hello! My friend has shared this circuit, how much current this 417A circuit drawing? Thanks! .......
174: Tube DIY Asylum, Regulator for 300vdc?? (0.00)
Posted by Tubenstein on 2016-01-18, 12:32:30 (219.79.186.29)
I found this circuit in my hard drive, whether it is capable to regulate 300vdc? .......
175: Tube DIY Asylum, RE: VR150 and....zeners? (0.00)
Posted by Tubenstein on 2016-01-17, 08:34:52 (219.73.21.234)
Dear Andy, Does it capable > 50ma as the circuit drawing 160vdc @ >50ma? Thanks! .......
176: Tube DIY Asylum, Gas Tube for 160vdc (0.00)
Posted by Tubenstein on 2016-01-16, 12:34:08 (219.78.188.43)
Hello! Which gas tube and how to regulate for 160vdc?? Thanks! .......
177: Tube DIY Asylum, RE: Questions about PS (0.00)
Posted by Tubenstein on 2016-01-16, 09:57:12 (219.78.188.43)
Dear TK, My friend has built this circuit and he wants to replace the 5Y3 with 2 x 5R4, is that possible? Thanks! .......
178: Tube DIY Asylum, Questions about PS (0.00)
Posted by Tubenstein on 2016-01-15, 22:27:11 (219.73.23.115)
My friend is building the attach circuit that is Brute Force from Eric Barbour. Do those 2 x OD3 is unnecessary at all and remove from the circuit?? .......
179: Tube DIY Asylum, Question about choke for choke input (0.00)
Posted by Tubenstein on 2016-01-14, 08:24:41 (219.79.186.168)
Hello! The transformer secondary winding is 230vac 200ma, what DCR of LC (10H) choke should we use to drop the voltage 250vdc?? Thanks! .......
180: Tube DIY Asylum, 6GK5 SRPP?? (0.00)
Posted by Tubenstein on 2016-01-08, 15:06:36 (220.246.210.251)
Hello! Did anyone build a SRPP line preamplifier with two 6GK5 and have the circuit to share? Thanks! .......
181: Tweakers' Asylum, Voltage requirement for capacitor (0.00)
Posted by Tubenstein on 2015-12-29, 14:54:39 (220.246.211.121)
Hello! Whether capacitor with 200v rating adequate for the position marked 1uf? Is 630v really necessary? Thanks! .......
182: Tweakers' Asylum, Roederstein vs. Tantalum (0.00)
Posted by Tubenstein on 2015-12-25, 01:23:44 (219.73.21.119)
Hello! Anyone has tried to replace ROE resistor with tantalum? What is the result? Thanks! .......
183: Tube DIY Asylum, RE: Aikido balanced (0.00)
Posted by Tubenstein on 2015-12-18, 10:42:42 (219.73.64.253)
No transformer. Differential / push pull preamp. Thanks! .......
184: Tube DIY Asylum, Aikido balanced (0.00)
Posted by Tubenstein on 2015-12-18, 10:12:59 (219.73.64.253)
Hello! Anyone have Aikido Balanced linestage circuit to share? Thanks! .......
185: Tube DIY Asylum, RE: Tube Regulator (0.00)
Posted by Tubenstein on 2015-09-28, 14:18:56 (219.79.235.118)
Any circuit?? .......
186: Tube DIY Asylum, Tube Regulator (0.00)
Posted by Tubenstein on 2015-09-28, 04:19:53 (219.73.76.6)
Anyone has built a regulator with the following tubes? 6080, 6GC5, 6JC6A and 5651 .......
187: Tubes Asylum, Who has Counterpoint SA-9 circuit? (0.00)
Posted by Tubenstein on 2015-08-02, 18:39:05 (219.79.235.58)
Who has Counterpoint SA-9 circuit to share?? .......
188: Tube DIY Asylum, stacked power supply for tube amplifier (0.00)
Posted by Tubenstein on 2015-07-23, 11:29:28 (219.79.235.54)
Hello! Rumour has it that stacked power supply required to use same power transformer for both driver and output section and the transformer must be carefully wound with special attention. Is that rea .......
189: Tubes Asylum, RE: KT88 in triode (0.00)
Posted by Tubenstein on 2015-04-05, 11:51:45 (219.79.186.187)
My friend just bought a pair of ASL Hurricane MKII and would like to seek information any good sounding KT88 running in triode mode. The stock unit comes with Valve Art KT88. Since this is a big inves .......
190: Tubes Asylum, RE: KT88 in triode (0.00)
Posted by Tubenstein on 2015-04-03, 16:32:38 (219.78.188.131)
What about fuller KT88G and JJ KT88? How both of them perform in triode mode? And they sounds like in triode? .......
191: Tubes Asylum, KT88 in triode (0.00)
Posted by Tubenstein on 2015-04-03, 14:26:11 (219.78.188.131)
Hello! Which brand of KT88 sounds the best wired in triode configuration? Thanks! .......
192: Tweakers' Asylum, RE: Tantalum vs. Roederstein resista (MK) resistor (0.00)
Posted by Tubenstein on 2015-03-10, 06:45:59 (219.73.22.29)
Hello! Friend of mine has modified his ARC SP-11 MKII by replacing all Roederstein with mixture of Vishay TX2352, Shinkoh tantalum, Audio Note tantalum (2W only), and Dale CPF3 with great result. He t .......
193: Tweakers' Asylum, Tantalum vs. Roederstein resista (MK) resistor (0.00)
Posted by Tubenstein on 2015-03-08, 20:22:47 (219.73.22.148)
Can anyone tell me the difference between the two resistor? Does the tantalum as transparent as the Roederstein? Thanks! .......
194: Tube DIY Asylum, Tantalum vs. Roederstein MK resistor (0.00)
Posted by Tubenstein on 2015-03-08, 09:41:12 (220.246.211.181)
Can anyone tell me the difference between the two resistor? Does the tantalum as transparent as the Roederstein? Thanks! .......
195: Tube DIY Asylum, RE: Cathode resistor for 417A (0.00)
Posted by Tubenstein on 2014-11-09, 20:24:24 (218.254.72.144)
Hello! B+ is 150v and load impedance (primary of line OPT) is 2.5K:600 ohm. Thanks! .......
196: Tube DIY Asylum, Typo mistake, and it should 62R, 80R or 91R (NT) (0.00)
Posted by Tubenstein on 2014-11-09, 02:03:29 (218.254.72.144)
. .......
197: Tube DIY Asylum, Cathode resistor for 417A (0.00)
Posted by Tubenstein on 2014-11-09, 01:58:54 (218.254.72.144)
What is your suggested cathode resistor value for 417A /5842? 92 ohm, 80 ohm or 91 ohm? .......
198: Tube DIY Asylum, RE: NO (0.00)
Posted by Tubenstein on 2014-11-07, 19:05:18 (218.254.72.144)
Where should he put the chokes? .......
199: Tube DIY Asylum, RE: NO (0.00)
Posted by Tubenstein on 2014-11-07, 10:49:12 (218.254.72.144)
No regulator. What about beefy up the power supply by raising the capacitance from 22uf to 500uf or much higher capacitance with better quality capacitor? Especially have PIO cap for the first one af .......
200: Tube DIY Asylum, RE: NO (0.00)
Posted by Tubenstein on 2014-11-07, 06:24:25 (218.254.72.144)
I meant the signal path whether any similarities there. My friend is building this linestage and want to put a Salas SSHV2 reg (as well as negative rail by ground the positive) there. .......
201: Tube DIY Asylum, Are both the same? (0.00)
Posted by Tubenstein on 2014-11-06, 02:59:16 (218.254.72.144)
It looks like both are the same circuit, is it?? We can't tell the difference. Any comments? The analog metric has some solid state device there. http://www.analogmetric.com/gallery.php?id=1394 http:/ .......
202: Tube DIY Asylum, Aikido with 6FQ7 (0.00)
Posted by Tubenstein on 2014-11-03, 05:49:24 (218.254.72.144)
My friend has built a Aikido with 6H30 and no he want to revised the circuit with 6FQ7, what is the B+ voltage gotta be? .......
203: Tube DIY Asylum, Seeking LCR Phono circuit (MC step and TX coupled) (0.00)
Posted by Tubenstein on 2014-10-31, 23:22:48 (218.254.72.144)
Hello! Can anyone able to suggest a very best LCR phono circuit with MC step up and output transformer coupled? Thanks! Andy .......
204: Tube DIY Asylum, KBG-MN VS. K75-10 (0.00)
Posted by Tubenstein on 2014-09-18, 21:05:51 (218.254.72.144)
What is your comments about either cap for signal coupling? .......
205: K&K Audio / Lundahl Transformers, RE: LL9202AMPPZ (0.00)
Posted by Tubenstein on 2014-08-13, 20:53:48 (218.254.72.144)
What type of insulation the LL9202AMPPZ use? Paper or plastic (eg Teflon, mylar etc)? .......
206: K&K Audio / Lundahl Transformers, LL9202AMPPZ (0.00)
Posted by Tubenstein on 2014-08-12, 04:04:08 (218.254.72.144)
What is the physical size of LL9202AMPPZ? Thanks! .......
207: Tube DIY Asylum, RE: No. (0.00)
Posted by Tubenstein on 2014-07-26, 09:23:16 (218.254.72.144)
The resistor value is 270R, so the cap value....?? .......
208: Tube DIY Asylum, Cathode bypass capacitor (0.00)
Posted by Tubenstein on 2014-07-26, 06:29:04 (218.254.72.144)
Hello! Is the value of cathode bypass capacitor larger the better? thx! .......
209: Tube DIY Asylum, RE: New production Sprague Vitamin Q Type 196P (0.00)
Posted by Tubenstein on 2014-06-17, 10:49:04 (218.254.72.144)
What about the difference between new and old in terms of sound? .......
210: Tube DIY Asylum, New production Sprague Vitamin Q Type 196P (0.00)
Posted by Tubenstein on 2014-06-16, 17:37:26 (218.254.72.144)
Is the new production Sprague Vitamin Q Type 196P identical to the vintage / original Vitamin Q? .......
211: Hi-Rez Highway, RE: ITune High Res (0.00)
Posted by Tubenstein on 2014-05-18, 09:54:18 (218.254.72.144)
Hi! I mean download hi-res music from the iTunes store and you already give me the answer, thank you! Do you have idea when this is available? Thanks! .......
212: Hi-Rez Highway, Toslink for high rez transmission (0.00)
Posted by Tubenstein on 2014-05-18, 09:52:19 (218.254.72.144)
Hello! Does Toslink able to transmit up to 24/192? Thanks! .......
213: K&K Audio / Lundahl Transformers, RE: Transformer for Mosfet Hybrid (0.00)
Posted by Tubenstein on 2014-05-10, 11:26:15 (218.254.72.144)
My friend suggest that LL1667 for the L1. .......
214: K&K Audio / Lundahl Transformers, RE: Transformer for Mosfet Hybrid (0.00)
Posted by Tubenstein on 2014-05-10, 08:57:28 (218.254.72.144)
Input? What input? .......
215: K&K Audio / Lundahl Transformers, Transformer for Mosfet Hybrid (0.00)
Posted by Tubenstein on 2014-05-10, 00:23:47 (218.254.72.144)
Hello! Do you have audio transformer for this circuit? http://www.turneraudio.com.au/solidstateamps5+tube-input.html .......
216: Hi-Rez Highway, ITune High Res (0.00)
Posted by Tubenstein on 2014-05-04, 00:08:07 (218.254.72.144)
Hello! I want to try iTune high resolution download music. I'm plying red book CD in my system, and my DAC is capable 24/96. Anyone is able to explain to me whether iTune is ready for 24/96? How to ha .......
217: Tube DIY Asylum, RE: Tango to cease making transformers? (0.00)
Posted by Tubenstein on 2014-05-03, 19:55:53 (218.254.72.144)
Depends on what you're looking for. Group of my friends here has dealt with couple different transformer vendor and they end up buying from Europe (Monolith, Tribute, in terms of price and sound quali .......
218: Tube DIY Asylum, RE: single triode with low impedance (0.00)
Posted by Tubenstein on 2014-01-18, 21:04:19 (61.18.218.68)
few hundred ohms :-) .......
219: Tube DIY Asylum, single triode with low impedance (0.00)
Posted by Tubenstein on 2014-01-18, 11:24:32 (61.18.218.68)
Hi! Any single triode with extremely low impedance along with "good voltage swing" Thanks! .......
220: Tube DIY Asylum, RE: Series Shunt regulated power supply?? (0.00)
Posted by Tubenstein on 2014-01-18, 07:54:40 (61.18.218.68)
Sorry, I should make it clear. Raw B+ => Series reg (with gas reference) => CCS + Shunt regulator (eg. Salas) .......
221: Tube DIY Asylum, RE: Series Shunt regulated power supply?? (0.00)
Posted by Tubenstein on 2014-01-18, 07:53:09 (61.18.218.68)
To my knowledge, a gas tube is very similar to a shunt (solid state type) regulator. How about that? Tube regulator with gas tube reference => CCS + Shunt regulator (eg. Salas) .......
222: Tube DIY Asylum, RE: Aikido with 5842 (0.00)
Posted by Tubenstein on 2014-01-16, 13:13:59 (61.18.218.68)
5842 has mu of 43 and we want to cut half of it, then Aikido supposed to be quite ideal along with very low Z. .......
223: Tube DIY Asylum, RE: Aikido with 5842 (0.00)
Posted by Tubenstein on 2014-01-16, 08:35:00 (61.18.218.68)
So what's wrong?? .......
224: Tube DIY Asylum, Aikido with 5842 (0.00)
Posted by Tubenstein on 2014-01-16, 08:00:18 (61.18.218.68)
I'm curious after talkiing to my friend. Did anyone build an Aikido with 5842? thx! .......
225: Tube DIY Asylum, RE: Series Shunt regulated power supply?? (0.00)
Posted by Tubenstein on 2014-01-14, 11:04:28 (61.18.218.68)
I'm confused. Where should the gas tube position with the series regulator? Is that what you meant? series reg => gas tube => CCS => shunt reg thx! .......
226: Tube DIY Asylum, Series Shunt regulated power supply?? (0.00)
Posted by Tubenstein on 2014-01-12, 08:20:34 (61.18.218.68)
Hello! Back in the old day, Stax has built their gears with series - shunt regulator in the power supply. Can I have a series regulator feeding the Salas SSHV2 shunt regulator in a tube preamp? Thanks .......
227: K&K Audio / Lundahl Transformers, Regulator and Parafeed OPT (0.00)
Posted by Tubenstein on 2014-01-11, 12:55:55 (61.18.218.68)
My friend doesn't have an account, so I posted for him. Will it be possible to have your 600V version shunt HV regulator for the output section of the circuit that is Welborne Labs Apollo? Also, d .......
228: Dynaco-Doctor Forum, URL of Curcio (0.00)
Posted by Tubenstein on 2014-01-11, 07:53:51 (61.18.218.68)
What's wrong with curcioaudio.com? The page seems not working. .......
229: Planar Speaker Asylum, Heil Air Motion Transformer vs. pure ribbon (0.00)
Posted by Tubenstein on 2013-07-18, 09:11:05 (61.18.218.68)
Currently discuss with my friend about both these 2 approaches for high frequency recreation. We concluded that Heil has less drawback on high and mid but lacks of ultra high frequency extension. Rib .......
230: High Efficiency Speaker Asylum, Vote: Your Favoruite Lowther desfin (0.00)
Posted by Tubenstein on 2013-07-12, 00:50:46 (61.18.218.68)
Which one is your favorite Lowther design? Example: TP1, Audiovector, Hedlund......etc. .......
231: Planar Speaker Asylum, Stacked Quad ESL 57 (0.00)
Posted by Tubenstein on 2013-05-24, 03:33:56 (61.18.218.68)
Recently, I have a conversation with peoples about stacking Quad ESL 57. One says the low impedance of stacked Quad ESL 57 (0.9 ohm on high frequency) mainly because of the high capacitive, that is no .......
232: Tube DIY Asylum, Maxim GM70 (0.00)
Posted by Tubenstein on 2013-05-20, 22:32:00 (61.18.218.68)
Hey guys!! I found a GM70 circuit. Can I raise the operating voltage to 1200v 90ma on the output tube? What else I need to change the circuit? Thanks! .......
233: K&K Audio / Lundahl Transformers, RE: HV shunt regulator?? (0.00)
Posted by Tubenstein on 2012-02-22, 11:06:32 (61.18.170.200)
When? I need the 600V version for 400V regulation!! Does it require a very large reservoir before the regulator? What about SS rectiifer -> 10mf -> choke -> 10mf -> Your 600V shunt regulator? What abo .......
234: K&K Audio / Lundahl Transformers, Input and interstage for Project T-1 (0.00)
Posted by Tubenstein on 2012-01-03, 00:49:13 (61.18.170.121)
My friend is seeking transformers for his project that is Marantz T-1, and I guess Lundahl should have input and interstage for that, don't they? The stock unit has OPT induistries (UTC) there. ::: .......
235: Tube DIY Asylum, Question about Thorens circlotron output device (0.00)
Posted by Tubenstein on 2012-01-01, 00:15:59 (61.18.170.137)
Who makes these 800W/300A MOSFET? .......
236: SET Asylum, RE: copper-plate GM70 (0.00)
Posted by Tubenstein on 2011-12-27, 21:59:35 (61.18.170.103)
What we concern whether it has enough gain from 20A to drive the GM70?? It seems the amplifier might need a step up before the driver, I guess. .......
237: SET Asylum, RE: copper-plate GM70 (0.00)
Posted by Tubenstein on 2011-12-27, 20:33:19 (61.18.170.47)
Don't you think a Emission Labs 20A choke loaded direct coupled to GM70 (running 1300V) a good idea? My friend is building this, but concern about the plate resistance of the 20A is a bit too high, do .......
238: Tube DIY Asylum, RE: DC coupled GM70 (0.00)
Posted by Tubenstein on 2011-12-27, 07:42:58 (61.18.170.97)
Hi Jeff! Sorry I press a wrong button for posting the previous message that I didn't finish. I agree with you, most of the high powered SE amplifier I've listened are waste of time. They are not sound .......
239: Tube DIY Asylum, RE: DC coupled GM70 (0.00)
Posted by Tubenstein on 2011-12-27, 07:31:59 (61.18.170.189)
Hi Jeff! How much power you think this is proper from a SE amplifier? 10-15W? Too much?? Thansk!! .......
240: Tube DIY Asylum, DC coupled GM70 (0.00)
Posted by Tubenstein on 2011-12-26, 23:40:20 (61.18.170.187)
Hello! I visited my friend during X'mas day and saw he is working on an amplifier based on the approach of the project from the link. The different is that his amplifier running 1300V B+ on the GM70. .......
241: Tube DIY Asylum, RE: Yes, 801 has higher Rp ... (0.00)
Posted by Tubenstein on 2011-12-08, 09:52:57 (61.18.170.132)
Hey what is the operating point your GM70 running? Thanks! .......
242: Tube DIY Asylum, RE: you don't need that much power i.e.the 300b, and the 801a (0.00)
Posted by Tubenstein on 2011-12-08, 02:58:57 (202.40.157.7)
The GM70 is going to operate at 1200V in A1. I've read from other forum people driving the GM70 in A1 by having 2 x 6SN7GTB in SRPP and this driver stage, and operate at pretty high B+ voltage, probab .......
243: Tube DIY Asylum, Plate impedance issue (0.00)
Posted by Tubenstein on 2011-12-07, 14:31:29 (61.18.170.125)
Hey! I found the 801A has higher plate resistance and plate imepdance than the 300B, that's the problem after talking to my friend just a min ago. .......
244: Tube DIY Asylum, RE: EML 20A --) 801A --) GM70!! n/t (0.00)
Posted by Tubenstein on 2011-12-07, 13:44:24 (61.18.170.164)
WHy 801A not 300B? .......
245: Tube DIY Asylum, EML 20A --) 300B --) GM70?? (0.00)
Posted by Tubenstein on 2011-12-07, 12:12:14 (61.18.170.81)
HI! Will it be possible using Emission Labs 20A direct coupled to 300B 1:1 transformer coupled to GM70? I intend to run the GM70 at 1200V. Any thoughts? I worry the plate impedance from the 20A is a b .......
246: K&K Audio / Lundahl Transformers, What about LL1677? (0.00)
Posted by Tubenstein on 2011-12-06, 06:19:27 (61.18.170.174)
Kevin, Forgot to ask you in my previous post. What about LL1677 80ma rather than LL1671? Do you have something like LL1677 80ma with 1:1 ratio since the primary inductance of LL1671 is much lower than .......
247: K&K Audio / Lundahl Transformers, Kevin, LL1671 for 65ma?? (0.00)
Posted by Tubenstein on 2011-12-06, 06:05:43 (61.18.170.39)
Kevin, I decided to build my GM70 SE amplifier with 300B driver via interstage transformer coupling to the output. You suggest I use the LL1671 / 65ma, but I downloaded the data sheet of LL1671 from .......
248: Tube DIY Asylum, RE:noisy SS shunt regulators? (0.00)
Posted by Tubenstein on 2011-08-12, 05:00:21 (180.219.36.170)
Hi tuneful! My friend has sent me a website, is that the Salas regulator you''re talking about? See link. Thanks! .......
249: Tube DIY Asylum, RE: Energy Storage (0.00)
Posted by Tubenstein on 2011-08-08, 14:22:02 (180.219.41.156)
A company called Tentlabs offers a module called Electronic Choke, how it's compare to conventional iron choke. If choke store energy, what about interstage transformer? I heard people arguing between .......
250: Tube DIY Asylum, Another interesting linestage (0.00)
Posted by tubenstein@live.com on 2011-08-05, 16:09:54 (121.203.0.115)
Actually I've listened to a linestage in other system recently that is transformer coupled based on EC8010. The owner told me that is the circuit from other forum. The owner has considered replace .......
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