1: SET Asylum, RE: How often do you roll? (0.00)
Posted by sony6060 on 2022-01-08, 07:32:13 (142.197.210.111)
I never heard a difference in tubes with zero hours and 100 hours myself. However, I know you know what you are talking about. .......

2: SET Asylum, RE: How often do you roll? (0.00)
Posted by sony6060 on 2022-01-08, 06:43:10 (142.197.210.111)
I only roll in the best sounding tubes. Tubes do not have a break-in period IMO. Best tubes sound the best in any high quality amp per my extensive tests over last 30 years. .......

3: Vintage Asylum, RE: Those are filled with ... (0.00)
Posted by sony6060 on 2022-01-08, 06:38:22 (142.197.210.111)
I never seen anything but Lloyds grade equipment in Goodwill stores. .......

4: Tubes Asylum, RE: EL84 vs EL-34? (0.00)
Posted by sony6060 on 2022-01-08, 06:33:54 (142.197.210.111)
About same sounding tubes, I would go for the more powerful EL34. .......

5: Tubes Asylum, RE: Mostly radio and TV tubes......... (0.00)
Posted by sony6060 on 2022-01-08, 06:32:46 (142.197.210.111)
No interest in used 'grab bag' tubes for me. .......

6: Tubes Asylum, RE: 6sn7 recommendations (0.00)
Posted by sony6060 on 2022-01-08, 06:31:26 (142.197.210.111)
Sylvania 6SN7 GTA 'Y' plate. 'A' series guarantees not later production than 1953 and later 6SN7s do not sound as good. .......

7: Tweakers' Asylum, RE: Constant Voltage Transformer? (0.00)
Posted by sony6060 on 2021-12-26, 04:20:29 (142.197.210.111)
I used a Sola CV transformer and did not hear any difference, but system has not high resolution at the time. Most do not recommend a CV transformer for quality sound. .......

8: Vintage Asylum, RE: Replacing oddball power transformer - Proton 1100 (0.00)
Posted by sony6060 on 2021-12-26, 04:16:38 (142.197.210.111)
Heyboer Transformer in MI will rebuild it. .......

9: Vintage Asylum, RE: Additional Advice to Newbies Interested in Vintage Gear (0.00)
Posted by sony6060 on 2021-12-26, 04:14:24 (142.197.210.111)
Most new Chinese tube amps outperform all but the most expensive vintage tube amps. .......

10: Tube DIY Asylum, RE: Increase choke inductance will smooth out the treble harsh? (0.00)
Posted by sony6060 on 2021-12-26, 04:11:05 (142.197.210.111)
Low noise HV Schottky diodes cleans up the treble. .......

11: Tubes Asylum, RE: Early Tung Sol straight bottle. My favorite after MV's.~nT (0.00)
Posted by sony6060 on 2021-12-26, 04:05:55 (142.197.210.111)
I rate 1960s Tung Sol 5U4GB highly. .......

12: Tubes Asylum, RE: How Bob Carver is Destroying Vacuum Tube Audio (0.00)
Posted by sony6060 on 2021-12-26, 04:03:37 (142.197.210.111)
That 75 watt audio transformer is rated at 15 watts. If so, that is an abortion. .......

13: Tube DIY Asylum, RE: 1% THD is Detectable by Most People (0.00)
Posted by sony6060 on 2021-11-25, 11:59:24 (142.197.210.111)
You best contact these experts on distortion that agree with my statement sir. http://www.r-type.org/articles/art-143.htm .......

14: Tweakers' Asylum, RE: Opinions on PCB repair work (0.00)
Posted by sony6060 on 2021-11-23, 02:59:38 (142.197.210.111)
Looks like a great repair to me. .......

15: Vintage Asylum, RE: Selling vintage speakers (0.00)
Posted by sony6060 on 2021-11-23, 02:56:20 (142.197.210.111)
Errrr, you failed to mention if you are willing to ship or not. That will determine best place to list speakers. .......

16: Tube DIY Asylum, RE: "AMPLIFIER DESIGNS FOR REDUCED IMD" (0.00)
Posted by sony6060 on 2021-11-23, 02:53:43 (142.197.210.111)
No one mentioned 2% or lower distortion is not detectable with most audiophiles. .......

17: Tubes Asylum, RE: 300b amps (0.00)
Posted by sony6060 on 2021-11-23, 02:50:07 (142.197.210.111)
What is your watts power requirement? That will decide if 300B or 845 final power tube. .......

18: Tubes Asylum, RE: 574B (0.00)
Posted by sony6060 on 2021-11-11, 13:11:29 (142.197.222.96)
1960s Tung Sol 5U4GB will give a WE 274 'a run for the money'. .......

19: Tubes Asylum, RE: What percentage of inmates (0.00)
Posted by sony6060 on 2021-11-11, 13:09:59 (142.197.222.96)
May be upwards of 60%. At Steve Hoffman I guess about 40%. AA has more refined audiophiles vs other sites. Tuned tube amps always sound better than SS IMO. .......

20: Tube DIY Asylum, RE: Suggest Rod Coleman regs x2 (0.00)
Posted by sony6060 on 2021-10-31, 06:15:53 (142.197.222.96)
Perhaps fixed bias would be better. .......

21: Tube DIY Asylum, RE: Suggest Rod Coleman regs x2 (0.00)
Posted by sony6060 on 2021-10-30, 07:58:05 (142.197.222.96)
Any three terminal IC regulator will work rated at three amps (some 6B4 may draw over an amp on the filament). Just supply with 10-12 volts well filtered DC. I would use a 10,000uF capacitor on each s .......

22: SET Asylum, RE: 2a3 and 6B4G amps and tubes - favourites? (0.00)
Posted by sony6060 on 2021-10-28, 07:37:44 (142.197.222.96)
Andy, I believe power output is more of a deciding factor vs quality of sound. Both the 300B and 2A3 sound good, but the 300B 8-10 watts out vs 3 watts is a large difference. .......

23: Vintage Asylum, RE: Total silliness IMHO (0.00)
Posted by sony6060 on 2021-10-20, 07:31:07 (142.197.222.96)
I think due to Covid sellers may be low on funds. So, they do not want to sell, but if a sucker pays their ridiculous asking price, they will sell it. .......

24: Tweakers' Asylum, RE: Dynaco PAS3 schematic (0.00)
Posted by sony6060 on 2021-10-12, 16:33:59 (142.197.222.96)
I am talking about tube amplifiers. They do have a preamp and most use .05uF to .1uF to the power tube grids from the preamp output on SE amps or on PP amps a phase inverter tube with .05 input and .1 .......

25: Tweakers' Asylum, RE: Not such a hard rule (0.00)
Posted by sony6060 on 2021-10-12, 16:29:32 (142.197.222.96)
Lew, tube amps use an output impedance matching transformer, not an output coupling capacitor. .......

26: Tweakers' Asylum, RE: Not such a hard rule (0.00)
Posted by sony6060 on 2021-10-12, 10:14:14 (142.197.222.96)
Every schematic of all the common tube amplifiers & tube receivers such as Dynaco, Eico, Scott, Fisher, Pilot, Heathkit, Grommes, Knight, etc never seen anything close to 1uF in a phono stage. .01uF a .......

27: Tweakers' Asylum, RE: Sorry to have created some consternation... (0.00)
Posted by sony6060 on 2021-10-12, 10:07:12 (142.197.222.96)
C109 and C110 are 10uF @ 40 volts. .......

28: Tweakers' Asylum, RE: Sorry to have created some consternation... (0.00)
Posted by sony6060 on 2021-10-11, 17:15:53 (142.197.222.96)
All values below .1uF? I never seen over 30 years of rebuilding SS amps and receivers using less than 2uF in FM radio coupling sections and never below 5uF every where else. .......

29: Tweakers' Asylum, RE: Not such a hard rule (0.00)
Posted by sony6060 on 2021-10-11, 17:13:25 (142.197.222.96)
Lets go with what manufactures are using. Every SS receiver or amplifier used at least 5uF and 10uF was most often used. No exceptions I saw. Tube amplifiers never used more than .3uF I ever seen over .......

30: Tweakers' Asylum, RE: PAYDIRT (0.00)
Posted by sony6060 on 2021-10-11, 05:28:47 (142.197.222.96)
SS coupling circuits usually use 10uF coupling capacitors and all of you are recommending tube type low value capacitors. .......

31: Tweakers' Asylum, RE: Is there an electrolytic capacitor shortage? (0.00)
Posted by sony6060 on 2021-10-03, 11:01:15 (72.168.176.215)
I did not recommend a capacitor ripple current. I usually buy the highest I can find at reasonable cost and size. .......

32: Tweakers' Asylum, RE: Is there an electrolytic capacitor shortage? (0.00)
Posted by sony6060 on 2021-10-03, 09:42:08 (72.168.176.215)
You do not want lower ripple current rated audio grade capacitors in the power supply. .......

33: Vintage Asylum, RE: Concurred. (0.00)
Posted by sony6060 on 2021-10-02, 05:26:53 (72.168.176.215)
Luxman PD-272 is a great TT. The direct drive controller is all discrete, thus all parts are available unlike the custom IC drives. .......

34: SET Asylum, RE: Tube matching in SET amplifiers (0.00)
Posted by sony6060 on 2021-09-30, 06:53:04 (72.168.176.145)
Tube matching from one channel to the other is not necessary in a SET amp. But, I would use tubes that test within 10% of one another. .......

35: Tube DIY Asylum, RE: Nice ! .................I'll give it a try! .........nt (0.00)
Posted by sony6060 on 2021-09-30, 06:49:45 (72.168.176.145)
Any excess solder is quickly removed with solder wick. .......

36: Tube DIY Asylum, RE: For the Sake of Clarity - (0.00)
Posted by sony6060 on 2021-09-29, 01:07:17 (72.168.176.201)
Congratulations Triode Kingdom, your statement the 1N4007 being superior to the Schottky is the most ignorant statement perhaps ever on AA. 1N4007 rings like a bell, Schottky is dead silent. Unbelieva .......

37: Tweakers' Asylum, RE: Thumbs-up Schottky Diode Audiolab 6000cdt Transport Upgrade (0.00)
Posted by sony6060 on 2021-09-28, 17:57:27 (72.168.176.201)
Triode Kingdom at DIY Tube thinks you are imagining the Schottky performance. He prefers the 1N4007. .......

38: Tube DIY Asylum, RE: For the Sake of Clarity - (0.00)
Posted by sony6060 on 2021-09-28, 17:54:26 (72.168.176.201)
About no one except the unaware uses a 1N4007 vs lower noise UF4007. Where have you been. .......

39: Tubes Asylum, RE: Somedays tube hunting goes better than others (0.00)
Posted by sony6060 on 2021-09-28, 17:51:58 (72.168.176.201)
I do not know what you paid for those Mullards, but the find is insane. .......

40: Tubes Asylum, RE: 6SN7 versus two 6J5 types? (0.00)
Posted by sony6060 on 2021-09-28, 17:50:26 (72.168.176.201)
I am not sure if one outperforms the other. But the 76 or 6P5 definitely outperforms both. .......

41: Tube DIY Asylum, RE: Time Delay or not? (0.00)
Posted by sony6060 on 2021-09-26, 15:21:29 (72.168.176.203)
Lots are praising the Schottky diode in Tweaks/DIY section right now. Everyone is wrong except Triode Kingdom. .......

42: Tube DIY Asylum, RE: It's a Myth (0.00)
Posted by sony6060 on 2021-09-25, 10:20:23 (72.168.176.219)
Oh please.............. .......

43: Tube DIY Asylum, RE: It's a Myth (0.00)
Posted by sony6060 on 2021-09-25, 02:52:20 (72.168.176.219)
Some amps have better HV filters than others. Why do you think all tube amps have a power supply as well filtered as the H&K Citation II with a filter choke? Most amps do not have a choke. Try connect .......

44: Tube DIY Asylum, RE: It's a Myth (0.00)
Posted by sony6060 on 2021-09-24, 16:45:06 (72.168.176.219)
It's a Myth'. Ridiculous as many of us hear the difference with only changing the rectifiers. Cleaner sound every time. Scope pictures are everywhere of conventual diodes vs the Schottky. Zero ringing .......

45: Tube DIY Asylum, RE: Not for That Purpose (0.00)
Posted by sony6060 on 2021-09-24, 15:08:29 (72.168.176.32)
SS rectifiers spoil the sound unless you use Schottky rectifiers that have no switching noise like standard SS rectifiers. Schottky are same as a tube rectifier but have no voltage drop with peak high .......

46: Tube DIY Asylum, RE: Power transformer suitability question. (0.00)
Posted by sony6060 on 2021-09-21, 07:30:14 (142.197.222.96)
Use the transformer. At 7.6 lbs likely good for a 60 watt amp. Solid core wires do not perform less than stranded wires. Where did you read that? .......

47: Tubes Asylum, RE: Need to locate an amp tech in N Central FL area (0.00)
Posted by sony6060 on 2021-09-20, 05:48:54 (142.197.222.96)
I am not getting a PM. .......

48: SET Asylum, RE: It's not your email, it's his (0.00)
Posted by sony6060 on 2021-09-19, 14:24:57 (142.197.222.96)
Only Klipsch besides Klipschorns that cost a fortune are Klipsch Cornwall. Unlike the other Klipsch mentioned, the Cornwall will accurately reproduce the SET audio without distortion. In other words, .......

49: Propeller Head Plaza, RE: Aluminum disc vs Magnet (0.00)
Posted by sony6060 on 2021-09-19, 14:21:23 (142.197.222.96)
Magnets are snake oil. .......

50: Propeller Head Plaza, RE: Crossover capacitors? Exactly how critical is the value Z? (0.00)
Posted by sony6060 on 2021-09-19, 14:20:15 (142.197.222.96)
Very critical. Change values and you screw up the crossover point. Results in a hole in the response or distortion. .......

51: Tubes Asylum, RE: Need to locate an amp tech in N Central FL area (0.00)
Posted by sony6060 on 2021-09-18, 16:51:03 (142.197.222.96)
I live in Belleview, FL. I do it for free. If you have the caps, I do it while you wait. .......

52: Tweakers' Asylum, RE: Thumbs-up Schottky Diode Audiolab 6000cdt Transport Upgrade (0.00)
Posted by sony6060 on 2021-09-16, 03:03:43 (72.168.176.125)
Conventual to Schottky diodes will improve any electronics. It is same as a solid-state tube. .......

53: Vintage Asylum, RE: I've owned several Macs and Marantzs: all excellent amplification, (0.00)
Posted by sony6060 on 2021-09-16, 03:01:07 (72.168.176.125)
1979 and 1980 Onkyo TX-2500 MKII and TX-4500 MKII easily outplay 1970s Pioneer when tested side by side. Actually, not even close folks. Buy one. .......

54: SET Asylum, RE: I found your post in the Tube/DIY Forum ............... (0.00)
Posted by sony6060 on 2021-09-14, 12:47:47 (142.197.222.96)
As for a powerful true SET the 845 or 211 tube sums it up. .......

55: Tube DIY Asylum, RE: dynaclone and triode not offering transformers (0.00)
Posted by sony6060 on 2021-09-04, 17:09:40 (72.168.176.69)
Real Dynaco clones came from Triode Electronics. .......

56: Vintage Asylum, RE: RATS! (0.00)
Posted by sony6060 on 2021-08-30, 13:06:08 (142.197.222.96)
Any vintage Marantz 30 watts or greater that has been rebuilt. Not a rush over rebuild with a few caps replaced, all new caps. .......

57: Tubes Asylum, RE: This is Their Revenge (0.00)
Posted by sony6060 on 2021-08-28, 08:00:19 (142.197.222.96)
Your tubes are 5V4. .......

58: Tweakers' Asylum, RE: OMG...... (0.00)
Posted by sony6060 on 2021-08-27, 15:26:06 (142.197.222.96)
Too many greats checking out. Charlie Watts of Rolling Stones. .......

59: Vintage Asylum, RE: getting my Marantz 2238 serviced tomorrow (0.00)
Posted by sony6060 on 2021-08-27, 15:20:22 (142.197.222.96)
Pure class. Smart to rebuild vs replace with new. .......

60: Tube DIY Asylum, RE: 6V6 Maximum Anode Voltage? (0.00)
Posted by sony6060 on 2021-08-23, 13:52:21 (72.168.176.18)
It is fixed bias at the grid with cathode grounded. .......

61: Tube DIY Asylum, RE: Stumped about problem with hum in new amp build -Thanks (0.00)
Posted by sony6060 on 2021-08-23, 10:54:26 (72.168.176.18)
Try a 50 ohm pot across the filaments with center tap to ground. 1 watt minimum, 2 watt is best. .......

62: Tube DIY Asylum, RE: 6V6 Maximum Anode Voltage? (0.00)
Posted by sony6060 on 2021-08-23, 10:50:24 (72.168.176.18)
I have used 330 volts on plate with a -20 volt fixed bias for 310 volts plate to cathode. Never a flash over. .......

63: SET Asylum, RE: Anyone building or just got an S.E.T. amp ?? (0.00)
Posted by sony6060 on 2021-08-21, 06:37:07 (72.168.176.18)
I am thinking about a three tube in parallel 2A3 SET amp. I need about 7-8 watts with my 87dB sensitive speakers. Some may state why not a 300B? 2A3 is lower distortion. .......

64: Tubes Asylum, RE: Damn, I'll say so too! (nt) (0.00)
Posted by sony6060 on 2021-08-18, 21:02:21 (72.168.176.54)
7 series tubes usually bail out audiophiles replacing 6 series tubes. Best example are Sylvania oval plate 7C5 tubes. They are same plate as a Sylvania 6V6G. $10 for the NOS 7C5, over $60 for the NOS .......

65: Vintage Asylum, RE: Did Marantz Ever Install Sprague 160P Caps in the 8B as Stock? (0.00)
Posted by sony6060 on 2021-08-15, 06:01:15 (142.197.222.96)
I found the model number on an image of the bottom of the amp. These capacitors are maroon, not red. They are Model 600UE. I will pursue these. Thanks. .......

66: Vintage Asylum, RE: Did Marantz Ever Install Sprague 160P Caps in the 8B as Stock? (0.00)
Posted by sony6060 on 2021-08-14, 12:31:33 (142.197.222.96)
This is the first time in 25 years I ever read an old capacitor outperform the K40Y-9 except the Sprague Vitamin Q highest series (think 196P) that seems equal or perhaps slightly better. You are stat .......

67: Tube DIY Asylum, RE: Anyone Recognize This Amp? (0.00)
Posted by sony6060 on 2021-08-09, 16:26:42 (72.168.176.153)
It is homebrew .......

68: Tubes Asylum, RE: Sweet, I could go for a 442. mt (0.00)
Posted by sony6060 on 2021-08-07, 05:37:07 (142.197.222.96)
An issue of supply is Ham amplifiers use the 811A and 572B tubes as sourced from Shuguang and US supplier is RF Parts. However, RF Parts are out of stock on the 572B they named Taylor. RF Parts tests .......

69: Tubes Asylum, RE: Got a new Oldsmobile right here... new is old once again.~nT (0.00)
Posted by sony6060 on 2021-08-06, 14:14:12 (142.197.222.96)
If Shuguang is closed or at less than normal production, there will be a tube shortage. Shuguang has been in business since 1950 and knows how to make a good tube. .......

70: Tube DIY Asylum, RE: preaching gospels to geese ... (0.00)
Posted by sony6060 on 2021-08-02, 06:07:48 (72.168.176.91)
I do not much concern as long as both channels have the capacitor orientation the same. However, I use paper in oil with a grounded metal body for phono sections due to potential noise issues. Russian .......

71: Tube DIY Asylum, RE: Yea but... re. #2 (0.00)
Posted by sony6060 on 2021-08-02, 06:04:13 (72.168.176.91)
Err, the fan will cool the power tubes and the shield in-between the tubes and other components will not heat up those components. The Fisher was to be used base down and the holes around the power tu .......

72: Tube DIY Asylum, RE: Is mounting a Fisher x202b vertically a bad idea? (0.00)
Posted by sony6060 on 2021-08-01, 09:20:28 (72.168.176.33)
Place a small muffin fan on the power tubes and remove the bottom plate so the underside can ventilate. .......

73: Tubes Asylum, RE: Good, Reliable, affordable 6922's? (0.00)
Posted by sony6060 on 2021-07-31, 07:34:23 (72.168.176.33)
Best to buy 6N23P-EV first in title. These are around $20 a NOS tube. .......

74: Tubes Asylum, RE: Good, Reliable, affordable 6922's? (0.00)
Posted by sony6060 on 2021-07-30, 05:38:12 (72.168.176.33)
Oh, no good. Sellers are tricky posting 6N22P when actually a 6N1P. .......

75: Tubes Asylum, RE: Good, Reliable, affordable 6922's? (0.00)
Posted by sony6060 on 2021-07-29, 16:19:30 (72.168.176.33)
My $5 tubes I suggested are 6N23P-EV (did not add the EV) here: https://www.ebay.com/itm/322539283243?hash=item4b18d6e32b:g:Fq0AAOSwvFhajqx6 .......

76: Tubes Asylum, RE: Good, Reliable, affordable 6922's? (0.00)
Posted by sony6060 on 2021-07-29, 16:14:31 (72.168.176.33)
I trust your analysis Eli. .......

77: Tubes Asylum, RE: Did You Mean $50 for the 6N23P? (nt) (0.00)
Posted by sony6060 on 2021-07-29, 15:15:06 (72.168.176.33)
No, not $50. $5 each on ebay in NOS. You can buy as many as you want. Six tubes required per your post is $30. .......

78: Tubes Asylum, RE: Good, Reliable, affordable 6922's? (0.00)
Posted by sony6060 on 2021-07-29, 14:28:34 (72.168.176.33)
Eli, your post does not agree with the HEAD-FI review having the 6N23P in the top group of 17 tubes here: https://www.head-fi.org/threads/6922-tube-review-17-top-6922-6n23p-e88cc-cca-7308-e188cc-tubes .......

79: Tubes Asylum, RE: Good, Reliable, affordable 6922's? (0.00)
Posted by sony6060 on 2021-07-29, 11:59:09 (72.168.176.33)
BTW- Look for 6N23P with the silver, not grey shield. Silver shield are reported to sound a little better, but all 6N23P outperform most other 6922 manufactures. .......

80: Tubes Asylum, RE: Good, Reliable, affordable 6922's? (0.00)
Posted by sony6060 on 2021-07-29, 11:49:42 (72.168.176.33)
Russian 6N23P is best at $5 each. Even Electro Harmonic are $23 each. .......

81: Tubes Asylum, RE: Strong arm? (0.00)
Posted by sony6060 on 2021-07-24, 16:49:24 (142.197.222.96)
Nice jugs, but does not affect the tube performance. .......

82: Vintage Asylum, RE: Rebuilt Vintage not worth much more (0.00)
Posted by sony6060 on 2021-07-22, 04:32:31 (142.197.222.96)
Done properly? Either the capacitor is installed correct polarity or it does not work. Perhaps only installing some caps vs all caps could be an issue when advertised all new capacitors installed. I r .......

83: Tube DIY Asylum, RE: Bottlehead c4s w/standard RED LED's (0.00)
Posted by sony6060 on 2021-07-22, 04:29:45 (142.197.222.96)
What is interesting was years ago owner of Bottlehead (before Bottlehead existed) tried a single ended 6BQ5 and was shocked how good it sounded. That is how Bottlehead got started. .......

84: Tube DIY Asylum, RE: it is never as simple as A or B choices ... (0.00)
Posted by sony6060 on 2021-07-22, 04:27:08 (142.197.222.96)
Then, you are stating a coupling capacitor sounds different in one direction. .......

85: Tube DIY Asylum, RE: it is never as simple as A or B choices ... (0.00)
Posted by sony6060 on 2021-07-20, 07:43:09 (142.197.222.96)
Than, explain to me a third way to connect the coupling capacitor? .......

86: Vintage Asylum, RE: Be Careful Buying Vintage from Japan (0.00)
Posted by sony6060 on 2021-07-20, 05:21:33 (142.197.222.96)
I do not get it. Why buy from Japan with outrageous shipping charges to USA in the first place? .......

87: Tube DIY Asylum, RE: Film Capacitor Orientation Question (0.00)
Posted by sony6060 on 2021-07-20, 05:20:08 (142.197.222.96)
You realize the answer is simple- 'A' or 'B'. Outer foil to plate, not grid as it is lowest resistance to ground. Or, use metal case that is grounded. Simple as that. No reason for all the complicated .......

88: Tubes Asylum, RE: Hey Sony (0.00)
Posted by sony6060 on 2021-07-18, 05:29:33 (142.197.222.96)
Conventual diode- 50 cents. Hexfred or CIS Schottky- $6. .......

89: Tubes Asylum, RE: Hey Sony (0.00)
Posted by sony6060 on 2021-07-17, 13:34:57 (142.197.222.96)
Compared conventional diode to Hexfred and CIS Schottky. The Hexfred and CIS Schottky had a slightly, but noticeable quieter sound. All diodes feed extra large capacitors. If the caps were factory sto .......

90: Tubes Asylum, RE: Looking at the other end of things (0.00)
Posted by sony6060 on 2021-07-17, 04:05:49 (142.197.222.96)
Not all SS diodes are the same. Standard diode makes a lot of noise unlike a tube. Hexfred or CIS Schottky make little noise just like a tube. Yes, you can hear the difference. .......

91: Propeller Head Plaza, RE: Fuse rating question (0.00)
Posted by sony6060 on 2021-07-15, 07:25:40 (142.197.222.96)
Fast Blow fuse, use 2x current draw. Slow Blow fuse, use 1.25 times the current draw. Fuses can operate up to 1.5x the fuse current rating for up to 20 minutes. Personally, I use Slow blow at as close .......

92: Tweakers' Asylum, RE: Build a bridge rectifier diode orientation question? (0.00)
Posted by sony6060 on 2021-07-15, 07:17:37 (142.197.222.96)
Your post picture is wrong. Story has it right. .......

93: Tube DIY Asylum, RE: Film Capacitor Orientation Question (0.00)
Posted by sony6060 on 2021-07-15, 07:15:32 (142.197.222.96)
Normally outer foil is connected to the plate at tube in coupling circuits. For connecting to ground, use the outer foil. I only pay attention to phono sections that can pick up noise. But, I use meta .......

94: SET Asylum, RE: OT. When did people start confusing Copyrights with Patents? (0.00)
Posted by sony6060 on 2021-07-11, 04:44:23 (142.197.222.96)
A true 20 watt all tube 300B amplifier uses parallel tubes and more likely 16 watts maximum. .......

95: SET Asylum, RE: V-Cap (0.00)
Posted by sony6060 on 2021-07-11, 04:41:27 (142.197.222.96)
If the cost of the expensive V-Cap is beyond your means, try the few dollar Russian paper in oil K40Y-9. .......

96: Tubes Asylum, re: Tungsram 6NS7GT (0.00)
Posted by sony6060 on 2021-07-09, 07:24:54 (142.197.222.96)
Boxes look old, not new reproduction. But, I guess you never know for sure. .......

97: Tubes Asylum, re: Tungsram 6NS7GT (0.00)
Posted by sony6060 on 2021-07-09, 07:04:15 (142.197.222.96)
I doubt GE, the box does state Tungsram. .......

98: Tube DIY Asylum, RE: I understand (0.00)
Posted by sony6060 on 2021-07-06, 18:14:58 (174.253.162.55)
Here are three RCA/Siemens 6922 gold pin. One more NOS will show up. eBay item number:324185615034 .......

99: Tube DIY Asylum, RE: What about the heater supply. (0.00)
Posted by sony6060 on 2021-07-06, 17:59:23 (174.253.162.55)
Perhaps they re-biased the 6SN7s. I would certainly do so. As you might know, the only source for somewhat rare vintage tubes is eBay. .......

100: Tube DIY Asylum, RE: 6DJ8 To 6SN7 Adaptors (0.00)
Posted by sony6060 on 2021-07-05, 07:50:10 (142.197.222.96)
The 6DJ8 and 6SN7 are very different tubes. 6DJ8 has close to twice the gain and is biased at a low voltage vs a 6SN7. Operating voltage is much lower vs a 6SN7. I would scrap the idea and buy RCA 692 .......

101: Tubes Asylum, RE: Can you identify this EL84 and help troubleshoot noise? (0.00)
Posted by sony6060 on 2021-07-05, 07:38:28 (142.197.222.96)
Russian EL84. Can be either 6P43P-E or 6P14P-EV that is more heavy duty. .......

102: Vintage Asylum, RE: Cactus! (0.00)
Posted by sony6060 on 2021-07-04, 06:27:23 (142.197.222.96)
That receiver has leaky and poor sounding coupling capacitors. Replace with 200 volt Russian K40Y-9. Tubes for best sound are GE 12AX7.7025 short plate and Siemens 6BM8. RCA 6BM8 with Made in Germany .......

103: Amp/Preamp Asylum, RE: How is Cary now? (0.00)
Posted by sony6060 on 2021-06-04, 08:48:23 (47.26.52.145)
Dennis Had is interesting. He owned Dentron a manufacture of Ham Radio linear amplifiers. Then owned Amp Supply and Prime Instruments who made Ameritron. His secretary liked Dennis and that ended his .......

104: Tubes Asylum, RE: Max Tube voltage during warm up (0.00)
Posted by sony6060 on 2021-06-03, 20:43:46 (47.26.52.145)
Nothing on maximum open voltage on the 6V6GT, but id a 6BQ5 can take 550 volts, at 530 volts the 6V6 will be ok. I believe the 6V6GT has higher element spacing vs the 6BQ5. .......

105: Tubes Asylum, Max Tube voltage during warm up (0.00)
Posted by sony6060 on 2021-06-03, 07:40:32 (47.26.52.145)
Using a choke input power supply with a direct filament rectifier tube, the rectifier produces voltage while the sudio power tubes are warming up. It sores to high values above 500 volts before the po .......

106: Amp/Preamp Asylum, RE: How is Cary now? (0.00)
Posted by sony6060 on 2021-06-03, 06:21:37 (47.26.52.145)
Cary are highly regarded. I do believe without Dennis Had (past owner), not much in new products is offered. .......

107: Vintage Asylum, RE: Looking for McIntosh C24 Volume Pot Recommendations (0.00)
Posted by sony6060 on 2021-06-02, 06:55:35 (47.26.52.145)
I do not have any potentiometers for sale. .......

108: Vintage Asylum, RE: Looking for McIntosh C24 Volume Pot Recommendations (0.00)
Posted by sony6060 on 2021-06-01, 21:03:23 (47.26.52.145)
Intermittent for a potentiometer is done. Static during turning and returning to normal is a good candidate for DeOxit. C24 is an expensive preamp, why 'slum it'. .......

109: Tweakers' Asylum, RE: brain infarction (0.00)
Posted by sony6060 on 2021-05-31, 05:53:39 (47.26.52.145)
Why is this post so popular? Are most of you 'plug & play' audiophiles? The post one down highly increasing amp or receiver performance using Hexfred diodes gets little press- go figure. .......

110: SET Asylum, RE: Decware SE84UFO25 (0.00)
Posted by sony6060 on 2021-05-31, 05:49:26 (47.26.52.145)
With the low power you best own 95dB sensitive speakers. If lower sensitivity, SE 300B tube amplifier is your best bet. .......

111: Tubes Asylum, RE: Current 12AX7 Tubes Recs Needed (0.00)
Posted by sony6060 on 2021-05-31, 05:47:07 (47.26.52.145)
BTW- why new, is NOS excluded? .......

112: Speaker Asylum, RE: Would a passive x-over in a loudspeaker also create phase shifts same as an equalizer? (0.00)
Posted by sony6060 on 2021-05-31, 05:45:49 (47.26.52.145)
Any series capacitor causes a phase shift in a crossover or equalizer. .......

113: Radio Road, RE: Half width or smaller tuner? (0.00)
Posted by sony6060 on 2021-05-30, 05:59:44 (47.26.52.145)
Best FM tuner ever manufactured. Sony XDR F1HD. 6.38"w x 7.13"d x 2.38"h. Why others are posting large tuners when poster asked for 1/2 size is beyond me! .......

114: Tubes Asylum, RE: Anyone has a single orphaned Jolida 302/502 output transformer (0.00)
Posted by sony6060 on 2021-05-29, 07:00:37 (47.26.52.145)
If the owner is to buy any replacement transformers, forget Hammond. The only Class A rated accurate transformers are the Dynaco replacement from Triode Electronics. So, lets not make a mistake here! .......

115: Tube DIY Asylum, RE: If you just go with the volume pot (0.00)
Posted by sony6060 on 2021-05-26, 15:40:31 (47.26.52.145)
Good idea. I have two audio grade 2.7K resistors. .......

116: Vintage Asylum, RE: Looking for McIntosh C24 Volume Pot Recommendations (0.00)
Posted by sony6060 on 2021-05-26, 08:04:41 (47.26.52.145)
What is an uneven spot? Never heard of that. Old pots can get noisy when adjusting or intermittent. .......

117: Tubes Asylum, RE: Anyone has a single orphaned Jolida 302/502 output transformer (0.00)
Posted by sony6060 on 2021-05-26, 06:45:47 (47.26.52.145)
The odd chance you can find a transformer is about nil. Buy one from Jolida. If they have no stock, buy Dynaco ST-70 transformers from Triode electronics. Make sure they fit your amp. .......

118: Vintage Asylum, RE: Looking for McIntosh C24 Volume Pot Recommendations (0.00)
Posted by sony6060 on 2021-05-25, 20:32:53 (47.26.52.145)
It either works or not. Item is new, no reason not to work. You are protected with ebay that you can return anything for full refund. There is no risk. Or pay over $279 for stepped control. ::: TOPIC: .......

119: Tube DIY Asylum, RE: Tube Grid Bias Issue (0.00)
Posted by sony6060 on 2021-05-25, 17:41:09 (47.26.52.145)
Ok. Cathode bias is always there no matter if the grid is grounded at zero volts thus the tube is still properly biased. The grid has a 1 meg to ground resistor to stop grid leakage current at the 100 .......

120: Tube DIY Asylum, Tube Grid Bias Issue (0.00)
Posted by sony6060 on 2021-05-25, 16:40:48 (47.26.52.145)
I seen designs with the first preamp tube having the volume control output connected directly to the tube grid. At low or zero volume does not the potentiometer take that tube grid to zero volts with .......

121: Vintage Asylum, RE: Looking for McIntosh C24 Volume Pot Recommendations (0.00)
Posted by sony6060 on 2021-05-25, 15:20:19 (47.26.52.145)
Last one on eBay for quad pot. I would buy it for $145 and call it a day. Listing: 164155404668 .......

122: Vintage Asylum, RE: Don't forget ICs! (0.00)
Posted by sony6060 on 2021-05-24, 14:17:16 (47.26.52.145)
Thanks Tre, your knowledge is incredible. .......

123: Vintage Asylum, RE: Year small signal transistors became high quality (0.00)
Posted by sony6060 on 2021-05-24, 04:39:56 (47.26.52.145)
First silicon transistors were not great and some become noisy even from 1970 as documented on the internet. The Pioneer SX-1000TW was noted for noisy transistors after guessing 5000 hours use. I am s .......

124: Tubes Asylum, RE: Best 12BH7A NOS US made for QuickSilver V4 driver (0.00)
Posted by sony6060 on 2021-05-23, 15:24:32 (47.26.52.145)
Works for you, not for me. I have to look into it. Thanks. .......

125: Vintage Asylum, Pioneer SX-1980 sells for fortune (0.00)
Posted by sony6060 on 2021-05-23, 13:48:29 (47.26.52.145)
eBay Pioneer SX-1980 in working condition sold for $5500. Is this a record price? .......

126: Tubes Asylum, RE: Best 12BH7A NOS US made for QuickSilver V4 driver (0.00)
Posted by sony6060 on 2021-05-23, 12:41:01 (47.26.52.145)
RCA 12AX7 black plate is a very musical tube. Killer in preamps. Phono stages like neutral and clear sounding tubes. Westinghouse 12AX7 short plate with the center bump in the plate are best I heard. .......

127: Speaker Asylum, RE: Do you own a volt meter? (0.00)
Posted by sony6060 on 2021-05-23, 11:32:56 (47.26.52.145)
80db or 90db SPL would not damage the speakers. They are rated 40 to 250 watts. .......

128: Vintage Asylum, RE: Cause it doesn't say Pioneer, Marantz or Sansui on the faceplate ~ (0.00)
Posted by sony6060 on 2021-05-23, 08:56:43 (47.26.52.145)
Is not that the truth. A Pioneer built Allied does not sell, but is identical to Pioneer label that sells briskly at a good price. .......

129: Vintage Asylum, Year small signal transistors became high quality (0.00)
Posted by sony6060 on 2021-05-23, 08:51:01 (47.26.52.145)
I know 1965 to 1970 audio equipment had so-so quality small signal audio transistors and some become noisy. What year did these issues pass? Around 1975? .......

130: Tubes Asylum, RE: #1 through #10, why our host Jim McShane of course. Nt (0.00)
Posted by sony6060 on 2021-05-23, 08:45:02 (47.26.52.145)
Best price and takes any returns is Find A Tube in Ohio. Usually 1/2 the price of eBay NOS tubes. .......

131: Vintage Asylum, RE: Rebuilt Vintage not worth much more (0.00)
Posted by sony6060 on 2021-05-22, 21:18:23 (47.26.52.145)
Old geranium, yes hard to source. But late 1960s and newer small signal silicon transistors have newer equivalents. Problem with transistors is the huge gain differences in transistors vs precision tu .......

132: Tweakers' Asylum, RE: Diode upgrade to Hexfred (0.00)
Posted by sony6060 on 2021-05-22, 21:14:23 (47.26.52.145)
I also read Cree Schottky do not like high temps. Hexfred is more tolerant. Anyways, I use 1/2 size TO-220 heat sinks on both in the main power supply. I guess high power 100 watt and higher amps with .......

133: Tweakers' Asylum, RE: Diode upgrade to Hexfred (0.00)
Posted by sony6060 on 2021-05-22, 21:04:01 (47.26.52.145)
I read long ago 3x the PIV voltage is minimum for long term reliability. The 600 volt diodes are great in the 40 to 80 volt SS amp & receiver circuits. .......

134: Speaker Asylum, RE: Audax out of business? (0.00)
Posted by sony6060 on 2021-05-22, 19:57:36 (47.26.52.145)
Likely NOS being used. Speaker builder may have 1000s in stock. Audax owner does not respond to emails. Apparently Audax titanium tweeters must be stellar performers as higher-end speaker manufactures .......

135: Vintage Asylum, Rebuilt Vintage not worth much more (0.00)
Posted by sony6060 on 2021-05-22, 13:58:40 (47.26.52.145)
Why is rebuilt vintage SS equipment with all the capacitors replaced not worth much more than original? .......

136: Speaker Asylum, Audax out of business? (0.00)
Posted by sony6060 on 2021-05-22, 06:59:26 (47.26.52.145)
Audax was taken over by AAC Acoustic Applications in 2019. Site stated some products will be offered soon. Been two years and nothing. Audax titanium dome tweeters have been used by some higher end sp .......

137: Speaker Asylum, Huge Tweeter Comparison Site (0.00)
Posted by sony6060 on 2021-05-21, 16:01:10 (47.26.52.145)
You have the site posted perhaps 10 years ago that tested about 50 tweeters? I cannot find it now.\ I found it: Zaph Audio. .......

138: Tweakers' Asylum, RE: audiophile circuit breakers for use in US? (0.00)
Posted by sony6060 on 2021-05-21, 10:37:41 (47.26.52.145)
Never qualified old. Only reference is to new circuit breakers. .......

139: Tweakers' Asylum, RE: audiophile circuit breakers for use in US? (0.00)
Posted by sony6060 on 2021-05-20, 22:08:07 (47.26.52.145)
BTW- all my posts referred to new, not old circuit breakers. All new circuit breakers are UL tested. Or, you have reservations with UL testing Dave. Ridiculous. .......

140: Tweakers' Asylum, RE: audiophile circuit breakers for use in US? (0.00)
Posted by sony6060 on 2021-05-20, 22:00:50 (47.26.52.145)
Another rubbish play on words. 'A circuit breaker is not a circuit breaker'- stupid. I am more technical & have more engineering skills than the average electrician, but I should not post it when you .......

141: Vintage Asylum, RE: Looking for McIntosh C24 Volume Pot Recommendations (0.00)
Posted by sony6060 on 2021-05-20, 20:25:01 (47.26.52.145)
I see, pot with loudness tap. New one on ebay here. ebay item number `164155404668 (Quad pot) ebay item number 164155407517 (stereo pot) .......

142: Tweakers' Asylum, RE: audiophile circuit breakers for use in US? (0.00)
Posted by sony6060 on 2021-05-20, 20:04:13 (47.26.52.145)
Your electrician built power generation plants? I think not, but surely adequate for home electrical. He would be clueless to certify a 250KV transformer among dozens of other disciplines. Home type c .......

143: Vintage Asylum, RE: Looking for Macintosh C24 Volume Pot Recommendations (0.00)
Posted by sony6060 on 2021-05-20, 18:04:28 (47.26.52.145)
I have not seen the pot, but cannot a new pot be purchased? .......

144: Tweakers' Asylum, RE: audiophile circuit breakers for use in US? (0.00)
Posted by sony6060 on 2021-05-20, 17:55:25 (47.26.52.145)
Dave, you have opinions of my lack of electrical expertise, yet know zero about me and who I am. I managed & built power generation plants for Detroit Edison. Although not my first pack, Federal Pacif .......

145: Tweakers' Asylum, RE: audiophile circuit breakers for use in US? (0.00)
Posted by sony6060 on 2021-05-20, 13:52:58 (47.26.52.145)
Nonsense. All new circuit breakers are tested the same by companies outside of the circuit breaker manufacture and meet current USA codes including UL testing. BTW- I am a 'good' electrician. ::: TOPI .......

146: Tube DIY Asylum, RE: SE amp with tranny hum, only thru speakers with tube phono preamp (0.00)
Posted by sony6060 on 2021-05-20, 10:54:55 (47.26.52.145)
Try a separate ground wire from preamp chassis to amp chassis. Likely a Magnavox amp. .......

147: Tweakers' Asylum, RE: audiophile circuit breakers for use in US? (0.00)
Posted by sony6060 on 2021-05-20, 10:47:56 (47.26.52.145)
No such item as an audiophile circuit breaker. A circuit breaker is a circuit breaker. In fact, an after market circuit breaker does not meet any US electrical codes. .......

148: Vintage Asylum, RE: Reduce Vintage Aux Input Sensitivity (0.00)
Posted by sony6060 on 2021-05-20, 09:51:50 (47.26.52.145)
Errrr, there are other devices beyond a CD player that output a volt at high impedance. The design will accommodate both. I am selling the item, do not need a complaint of poor performance or a return .......

149: Vintage Asylum, RE: What is your goal (0.00)
Posted by sony6060 on 2021-05-20, 08:46:36 (47.26.52.145)
Upgrade the HV power supply rectifiers with CIS Cree Schottky or Hexfred for a power supply upgrade. .......

150: Vintage Asylum, RE: So in summary... (0.00)
Posted by sony6060 on 2021-05-20, 07:51:07 (47.26.52.145)
Same deal on fuses- Placebo effect. A fuse is a fuse. There is so much 'trash' in a 120 line from the circuit breaker box to the outlet before the fuse, how could a fuse change anything? It cannot. As .......

151: Vintage Asylum, RE: Reduce Vintage Aux Input Sensitivity (0.00)
Posted by sony6060 on 2021-05-19, 23:04:48 (47.26.52.145)
I found an impedance/resistor calculator. It needs a T network due to the high input impedance of the receiver. Your calculation is for a modern 600 ohm input receiver, not 100K input. .......

152: Vintage Asylum, RE: Reduce Vintage Aux Input Sensitivity (0.00)
Posted by sony6060 on 2021-05-19, 20:58:07 (47.26.52.145)
2 volt would need 20dB attenuation with 200mv input. I guess a 47K series resistor with a 10K shunt resistor on the 47K resistor output. .......

153: Vintage Asylum, RE: Pet Rock Upgrade (0.00)
Posted by sony6060 on 2021-05-19, 20:06:36 (47.26.52.145)
Bring back Pet Rocks to make better sound? What do you think? .......

154: Vintage Asylum, Reduce Vintage Aux Input Sensitivity (0.00)
Posted by sony6060 on 2021-05-19, 19:46:53 (47.26.52.145)
My Pioneer SX-1000TW auxiliary input is too sensitive at 200mv maximum signal for a CD player. CD player has about a 1 volt output. The Aux jacks is rated for 100K impedance. What value resistor shoul .......

155: Tweakers' Asylum, RE: Hexfred good-Schottky better (0.00)
Posted by sony6060 on 2021-05-19, 17:04:26 (47.26.52.145)
It called SIC Cree Schottky diodes. I used 600 volt 8 amp. The diodes only drop 1.1 volts at 3 amp current draw in most 50 watts amps. Higher wattage amps at up to 8 amps current drops 1.75 volts. Hex .......

156: Vintage Asylum, RE: So true about a lot of "improvements." If one changes (0.00)
Posted by sony6060 on 2021-05-19, 16:48:06 (47.26.52.145)
If one expects to sound better, in their brain it will sound better despite no actual change in performance. It is called the Placebo effect. 'Snake Oil' suppliers know this. Here is a small quote on .......

157: Vintage Asylum, RE: Sony6060, Onkyo TX-2500 Power Cord question (0.00)
Posted by sony6060 on 2021-05-19, 06:07:28 (47.26.52.145)
I have not noticed an increase in performance with boutique power cords. Replacing two conductor with a ground type power cord such as a low cost Belden is fine. I would use 18 gauge as a larger gauge .......

158: Tweakers' Asylum, Diode upgrade to Hexfred (0.00)
Posted by sony6060 on 2021-05-19, 05:59:46 (47.26.52.145)
What is your experience with the standard diode in SS equipment replaced with an upgrade to Hexfred diodes? .......

159: Tube DIY Asylum, RE: The Details (0.00)
Posted by sony6060 on 2021-05-19, 05:26:59 (47.26.52.145)
BTW- I posted more power with parallel 2A3, you audio transformers will only support one 2A3. .......

160: Vintage Asylum, RE: Vintage gear usable Power Output (0.00)
Posted by sony6060 on 2021-05-18, 17:40:54 (47.26.52.145)
Jurb, I have a lot of experience and also know parts. In the Onkyo, the transformer size can support a 60 watt RMS per channel amp. The output transistors are rated 80 watts. The capacitors were incre .......

161: Tube DIY Asylum, RE: The Details (0.00)
Posted by sony6060 on 2021-05-18, 15:54:12 (47.26.52.145)
Hard to beat a 2A3. More power for a SET, us two in parallel. The best preamp tube I ever used is an RCA 6P5GT. .......

162: Vintage Asylum, RE: Vintage gear usable Power Output (0.00)
Posted by sony6060 on 2021-05-18, 11:14:47 (47.26.52.145)
Jurb, reread my original post. .......

163: Vintage Asylum, RE: 87 db is Low Sensitivity (0.00)
Posted by sony6060 on 2021-05-17, 18:10:44 (47.26.52.145)
An ear is an ear. Tre apparently likes to argue. Despite what Tre states, protect your ears. .......

164: Vintage Asylum, RE: Onyko Op-Amps (0.00)
Posted by sony6060 on 2021-05-17, 15:29:02 (47.26.52.145)
Higher power output commands higher prices. If you can live with the 15 to 20 watt receivers, that where the great deals reside. Onkyo TX-1500 17 watt are $60 to $100 and Marantz 2216B 16 watt can be .......

165: Vintage Asylum, RE: 87 db is Low Sensitivity (0.00)
Posted by sony6060 on 2021-05-17, 12:14:26 (47.26.52.145)
It is about safety. Has nothing to do with music peaks or anything else. .......

166: Vintage Asylum, RE: 87 db is Low Sensitivity (0.00)
Posted by sony6060 on 2021-05-17, 10:19:33 (47.26.52.145)
Safe 80dB SPL is listening at 8 feet distance. 15 to 30 feet listening level at 90dB speaker output does not damage ears like in an outdoor house party with music playing. BTW- Tre is special. He has .......

167: Vintage Asylum, RE: 87 db is Low Sensitivity (0.00)
Posted by sony6060 on 2021-05-17, 10:07:51 (47.26.52.145)
I agree 90dB to 95dB SPL is dangerous to your hearing. 80dB SPL is IMO the maximum safe limit. Manufacturing plants that follow OHSA requirements limit noise exposure to 80dB SPL. .......

168: Vintage Asylum, RE: 87 db is Low Sensitivity (0.00)
Posted by sony6060 on 2021-05-17, 08:48:51 (47.26.52.145)
My post was how to get 'in the door' with a great sounding vintage receiver for around $500 to $600 after a rebuild for reliability. I also offered three good sounding receivers if the buyer had deepe .......

169: Vintage Asylum, RE: 87 db is Low Sensitivity (0.00)
Posted by sony6060 on 2021-05-16, 14:36:27 (47.26.52.145)
100 Watts? What listening distance sre you referring to? 80dB SPL is loud on 87dB speakers at 8 feet listening distance. Cannot hear people taking. I do not think many listen above 80dB SPL. ::: TOPIC .......

170: Vintage Asylum, RE: 87 db speakers are Not standard (0.00)
Posted by sony6060 on 2021-05-16, 11:17:07 (47.26.52.145)
117 to 120 volts is no big deal for solid-state equipment. Even 117 to 125 volts is ok. I heard some places have as high as 128 volts during off peak hours. 115 volt tube equipment with a voltage doub .......

171: Vintage Asylum, RE: 87 db speakers are Not standard (0.00)
Posted by sony6060 on 2021-05-16, 10:13:00 (47.26.52.145)
I was not speaking of vintage speakers. Most new speakers are an average of 87dB. .......

172: Vintage Asylum, Vintage gear usable Power Output (0.00)
Posted by sony6060 on 2021-05-15, 10:23:00 (47.26.52.145)
Amps and receivers are rated RMS power output. But, what can you use without clipping issues at higher volumes? I figured this out with listening to a few receivers. My 40 watt Onkyo TX-2500 starts to .......

173: Vintage Asylum, RE: Problem with Onkyo gear is when you tell your buddies you own (0.00)
Posted by sony6060 on 2021-05-15, 10:07:51 (47.26.52.145)
BTW- jury is in, the rebuilt & upgraded Onkyo TX-2500 is better sounding vs my rebuilt & upgraded Pioneer SX-1000TW. In fact, no contest. The Pioneer has a more sensitive FM tuner though. .......

174: Vintage Asylum, RE: Onyko Op-Amps (0.00)
Posted by sony6060 on 2021-05-15, 10:05:36 (47.26.52.145)
I sold my Sony STR-6060 when I bought a tube Fisher receiver years ago. For SS, it did sound good, but I think my Onkyo TX-2500 sounds better. However, hard to tell due to my Revel M22 speakers are se .......

175: Vintage Asylum, RE: Problem with Onkyo gear is when you tell your buddies you own (0.00)
Posted by sony6060 on 2021-05-15, 10:02:58 (47.26.52.145)
Agree. Japanese companies names vs the American sounding names. How about Kenwood. Kenwood is English meaning Kings Wood. Anyways, the Onkyo was not only over0built, it sounds better than most and cer .......

176: Vintage Asylum, RE: Celestion Ditton 33 playmate (0.00)
Posted by sony6060 on 2021-05-15, 09:24:05 (47.26.52.145)
Just about any model Revox is right up there with the best vintage gear. .......

177: Radio Road, RE: FM Stations are so poor Quality Now (0.00)
Posted by sony6060 on 2021-05-15, 09:20:10 (47.26.52.145)
Yes, but FM stations always had RF tube(s). I am referring to the audio quality and it is not handled by an RF tube. .......

178: Vintage Asylum, RE: Vintage SS Rebuild Maximum HV Capacitance (0.00)
Posted by sony6060 on 2021-05-15, 08:38:16 (47.26.52.145)
It is not a 'dogmatic' approach. I always use PDSUII to look at the AC ripple at maximum current draw. I believe vintage equipment designers used the minimum acceptable capacitance, but I think a limi .......

179: Vintage Asylum, Vintage SS Rebuild Maximum HV Capacitance (0.00)
Posted by sony6060 on 2021-05-15, 08:06:59 (47.26.52.145)
Rebuilding vintage solid-state amplifiers and receivers, the main high voltage capacitors are replaced. I use no larger than 2.5 times the original capacitance. I believe no benefits exists exceeding .......

180: Vintage Asylum, RE: Onyko Op-Amps (0.00)
Posted by sony6060 on 2021-05-14, 21:49:47 (47.26.52.145)
Another picture- Onkyo TX-2500 .......

181: Vintage Asylum, RE: Onyko Op-Amps (0.00)
Posted by sony6060 on 2021-05-14, 21:46:01 (47.26.52.145)
My Onkyo TX-2500 .......

182: Propeller Head Plaza, Free to Good Home (0.00)
Posted by sony6060 on 2021-05-14, 12:31:26 (47.26.52.145)
On another site some audio gear was offered free, just pay shipping. Items were outside of USA where I reside. I inquired and the owner stated he can ship for $550. USPS calculator shown $130 shipping .......

183: Vintage Asylum, Onyko Op-Amps (0.00)
Posted by sony6060 on 2021-05-13, 20:58:57 (47.26.52.145)
I had a lot of vintage gear including vintage CD players with the great TDA5814 chip. The op-amps in these early equipment were rather poor. Even the modern 8 pin in some 1980s gear were so-so. I repl .......

184: Vintage Asylum, RE: My daily driver is a TX-4500 MKII; it beat out a Kenwood KR-6600, Pioneer SX-780, and Outlaw Audio RR-2500 ... (0.00)
Posted by sony6060 on 2021-05-13, 07:48:51 (47.26.52.145)
I been comparing the TX-2500 MKII to a completely rebuilt and upgraded Allied 395 (Pioneer SX-1000TW). It is a close contest. The Allied 395 is a bit more almost clinical sounding and extremely clear. .......

185: Vintage Asylum, RE: My daily driver is a TX-4500 MKII; it beat out a Kenwood KR-6600, Pioneer SX-780, and Outlaw Audio RR-2500 ... (0.00)
Posted by sony6060 on 2021-05-13, 06:57:26 (47.26.52.145)
To outperform an Outlaw RR-2500 is impressive. Wow! .......

186: Vintage Asylum, RE: As an old Marantz guy..... (0.00)
Posted by sony6060 on 2021-05-13, 05:16:10 (47.26.52.145)
As stated the TX-2500 has no op-amps. The TX-2500 MKII has op-amps in the phono section and in the main amp board. Most early op-amps do not sound good, but the TX-2500 MKII has great sounding op-amps .......

187: Tubes Asylum, RE: How important is tube matching? (0.00)
Posted by sony6060 on 2021-05-12, 16:12:36 (47.26.52.145)
Important for push-pull amps, much less for preamps most tubes have about same gain in same brand pairs using NOS, of course. Single-ended amps are not so important regarding power tubes. Careful of a .......

188: Amp/Preamp Asylum, RE: Need recommendation for integrated amp (0.00)
Posted by sony6060 on 2021-05-12, 16:09:53 (47.26.52.145)
Why would a remote trump great sound? .......

189: Radio Road, FM Stations are so poor Quality Now (0.00)
Posted by sony6060 on 2021-05-12, 15:18:58 (47.26.52.145)
50 years ago FM stations were actively competing for best sound. Now, most are full of distortion and just lousy sound. Two FM stations here that sounds fairly good are only 5000 watt RF output statio .......

190: Vintage Asylum, RE: Rebuilt Onkyo TX-2500 MK II (0.00)
Posted by sony6060 on 2021-05-12, 15:10:48 (47.26.52.145)
They are also very reliable after all these years. .......

191: Vintage Asylum, RE: Rebuilt Onkyo TX-2500 MK II (0.00)
Posted by sony6060 on 2021-05-12, 15:10:22 (47.26.52.145)
They are also very reliable after all these years. Interesting they use glass Gq0 circuit boards when many use cheap phenolic boards. .......

192: Vintage Asylum, Rebuilt Onkyo TX-2500 MK II (0.00)
Posted by sony6060 on 2021-05-12, 13:48:33 (47.26.52.145)
I finished the TX-2500 rebuild using audio grade Silmic II capacitors, CIS Cree Schottky diodes in the two sub power supplies and Hexfred diodes in the main power supply. Main power supply capacitors .......

193: Amp/Preamp Asylum, RE: Need recommendation for integrated amp (0.00)
Posted by sony6060 on 2021-05-12, 07:19:27 (47.26.52.145)
Tube: Yaqin MC-100B. It was great preamp tubes, needs phono stage. Solid-State: Rega Brio, it has built-in phono stage.. .......

194: Amp/Preamp Asylum, RE: Fun article thanks (0.00)
Posted by sony6060 on 2021-05-11, 12:12:09 (47.26.52.145)
Amount of sales or best sounding? New tube amps are better sounding vs vintage tube amps. .......

195: Tube DIY Asylum, RE: Seems Fitz has left the building nt (0.00)
Posted by sony6060 on 2021-05-11, 08:19:00 (47.26.52.145)
I think he bought a REGA Brio. .......

196: Vintage Asylum, RE: Different ERA (0.00)
Posted by sony6060 on 2021-05-11, 07:32:54 (47.26.52.145)
About updating with better parts, the capacitors are old anyways, why not replace with the best. .......

197: Tweakers' Asylum, RE: Ohh!!! Was you thinking of you and some of the other Central OG's! (0.00)
Posted by sony6060 on 2021-05-11, 07:29:49 (47.26.52.145)
Frankly I never heard a boutique power cord that sounded better than a standard Belden for $10. .......

198: Amp/Preamp Asylum, RE: What 6922 tubes are you using? (0.00)
Posted by sony6060 on 2021-05-10, 18:33:20 (47.26.52.145)
These tubes on ebay are Siemens 6922. eBay item number 393094312444 .......

199: Amp/Preamp Asylum, RE: What 6922 tubes are you using? (0.00)
Posted by sony6060 on 2021-05-10, 18:33:05 (47.26.52.145)
These tubes on ebasy are Siemens 6922. eBay item number 393094312444 .......

200: Amp/Preamp Asylum, RE: What 6922 tubes are you using? (0.00)
Posted by sony6060 on 2021-05-10, 18:30:46 (47.26.52.145)
These tubes on ebasy are Siemens 6922. https://www.ebay.com/itm/393094312444?hash=item5b863f31fc:g:MokAAOSwjcVf~mJ5 .......

201: Amp/Preamp Asylum, RE: What 6922 tubes are you using? (0.00)
Posted by sony6060 on 2021-05-10, 17:02:13 (47.26.52.145)
The best 6922 that can easily found are RCA 6922 gold pin with Made in Germany stamped on box with black ink. They are early 1960s Siemens. About $90 a tube in NOS. Usually listed on ebay. ::: TOPIC:: .......

202: Tweakers' Asylum, RE: Elna Silmic II caps?... (0.00)
Posted by sony6060 on 2021-05-10, 04:20:46 (47.26.52.145)
BTW- My post above is a receiver I just rebuilt. I have not used Silmic II in the last few years, but new rebuild using Silmic II confirms the performance. .......

203: Tweakers' Asylum, RE: Elna Silmic II caps?... (0.00)
Posted by sony6060 on 2021-05-09, 20:14:48 (47.26.52.145)
I like Silmic II. A musical capacitor IMO. They sounded good right away. Went a little duller and after 75 hours started opening up again. 100-150 hours and they will 'be there'. I do mix Silmic II wi .......

204: Amp/Preamp Asylum, RE: Intel is taking a risk.... (0.00)
Posted by sony6060 on 2021-05-09, 11:53:55 (47.26.52.145)
What do I hear comparing a CIS zero crossover diode vs a 1N5408 standard diode. Other posts state the treble is improved. Perhaps my ears are not good enough to hear the difference in the treble, but .......

205: Vintage Asylum, RE: The Market (0.00)
Posted by sony6060 on 2021-05-09, 07:18:26 (47.26.52.145)
BTW- rebuilders of vintage gear do not change out the rectifiers. It is important for best sound to use Hexfred rectifies and a 1/2 size TO-220 heat sink is needed on receivers above 15 watts per chan .......

206: Amp/Preamp Asylum, RE: Magnavox tube amp hookup (0.00)
Posted by sony6060 on 2021-05-09, 05:19:07 (47.26.52.145)
It is a very nice sounding amp. About 12 to 15 watts per channel. The 6EU7 tubes are RCA. Change to GE 6EU7for better sound. You can sell the RCA for $30. These: https://www.ebay.com/itm/333972925154? .......

207: Vintage Asylum, RE: Just wait it out a year or two then... (0.00)
Posted by sony6060 on 2021-05-09, 04:49:33 (47.26.52.145)
Congrats on the Citation II. .......

208: Vintage Asylum, RE: Vintage vs New Amplification (0.00)
Posted by sony6060 on 2021-05-09, 04:47:50 (47.26.52.145)
I wont leave here, AA is much more civilized vs DIY Audio and Steve Hoffman forums. I posted for first time in years at DIY Audio and was trolled immediately. Also, trolled on two different posts at S .......

209: Amp/Preamp Asylum, RE: Magnavox tube amp hookup (0.00)
Posted by sony6060 on 2021-05-09, 04:40:59 (47.26.52.145)
You did not show a picture of top of chassis, but looks like two RCA jacks on top close to the volume control. If so, those are the amp input. The two gold colored jacks pictured on side of chassis ar .......

210: Tube DIY Asylum, RE: Polypropylene caps don't sound the same. (0.00)
Posted by sony6060 on 2021-05-09, 03:45:53 (47.26.52.145)
Cathode bypass is another matter. But, interesting hearing about your findings on the power supply capacitors. An amp is a modulated power supply and the power supply has to be the best for best sound .......

211: Tube DIY Asylum, RE: He said both filaments are DC. (nt) (0.00)
Posted by sony6060 on 2021-05-08, 15:51:29 (47.26.52.145)
Post before mine stated AC on 2A3s. If DC, perhaps 01 tube shields are an improvement. Test first by placing tin foil over tubes and add a weight to press foil to chassis for a ground connection. Shie .......

212: Tube DIY Asylum, RE: Polypropylene caps don't sound the same. (0.00)
Posted by sony6060 on 2021-05-08, 15:46:01 (47.26.52.145)
The posts states the power supply, not an amplifier. Paper/oil are best sounding in an amplifier. Sprague 196P Vitamin Q or Russian K40Y-9 are great performers. .......

213: Tube DIY Asylum, RE: How do they compare with DC Link caps? (0.00)
Posted by sony6060 on 2021-05-08, 14:54:54 (47.26.52.145)
Use smaller polypropylene type caps. All perform about the same and about as good paper/oil type.. .......

214: Tube DIY Asylum, RE: noise (0.00)
Posted by sony6060 on 2021-05-08, 14:53:06 (47.26.52.145)
Using AC on the output tubes may be the source. Remove the 01 tube and check the hum. If it is the same, put a hum balance pot on the 2A3. .......

215: Amp/Preamp Asylum, RE: Intel is taking a risk.... (0.00)
Posted by sony6060 on 2021-05-08, 03:20:53 (47.26.52.145)
BTW- typical SIC Schottky forward voltage drop is 1.2 volts at 3 amps. .......

216: Amp/Preamp Asylum, RE: Intel is taking a risk.... (0.00)
Posted by sony6060 on 2021-05-08, 02:05:16 (47.26.52.145)
There is no conclusion what sounds better. Either is superior to the common diode. Here is what I found with this question on a few sites. CIS Schottky has zero switching noise, but high leakage with .......

217: Vintage Asylum, RE: Vintage vs New Amplification (0.00)
Posted by sony6060 on 2021-05-07, 11:00:50 (47.26.52.145)
Thanks confirming what I an hearing from my upgraded Allied 395. I was mocked at Steve Hoffman forum for same post. Trolls all over the place- I am done there. .......

218: Vintage Asylum, Vintage vs New Amplification (0.00)
Posted by sony6060 on 2021-05-07, 05:27:27 (47.26.52.145)
Can vintage receivers and amplifier sound like new amplifiers? Lets discuss 1974 to 1980 vintage vs new amplifiers. New and vintage are of same design. There is no new technology. Both amplify a signa .......

219: Amp/Preamp Asylum, Hexfred vs SIC diodes (0.00)
Posted by sony6060 on 2021-05-06, 21:24:04 (47.26.52.145)
What is your experience which rectifier sounds better? It been a few years and no conclusion was posted at AA. I know some Hexfred are reported to not sound good, my post is referring to good sounding .......

220: Vintage Asylum, RE: too bad that you've gotten a few snarky, helpless comments (0.00)
Posted by sony6060 on 2021-05-06, 21:15:56 (47.26.52.145)
Actually, with the more collectable vintage receivers, a rebuild for the average price of $400 + $100 in shipping costs can be added and recovered if you sell it. If you DIY, about $100 in parts and f .......

221: Vintage Asylum, RE: Vintage Receivers- what to look for (0.00)
Posted by sony6060 on 2021-05-05, 15:07:33 (47.26.52.145)
Actually soild-state receiver parts are as abundant as tube parts. The SS receiver ICs are not available, but only exist in the tuner sections that I never found to fail. In the receivers I recommende .......

222: Vintage Asylum, RE: Well, it would be $1230 +shipping (0.00)
Posted by sony6060 on 2021-05-05, 12:46:05 (47.26.52.145)
Old ears. My ears are 71 years old. I used to tweak tube gear, but around age 65 noticed I could not hear the tiny differences any longer. At 68 tinnitus did set in, but about a 10Khz low level pitch .......

223: Vintage Asylum, RE: Well, it would be $1230 +shipping (0.00)
Posted by sony6060 on 2021-05-05, 07:30:03 (47.26.52.145)
Charlie, the point of the post is some have interest in vintage receivers, but do not know what to look for. There must be 100 different vintage receivers but only the three models I listed are worth .......

224: Vintage Asylum, RE: So you're saying you are willing... (0.00)
Posted by sony6060 on 2021-05-05, 06:26:43 (47.26.52.145)
Some doe not have $2K for Schiit systems. If it is working, one does not have to rebuilt either, buy new audio grade caps makes for a little superior sound. Perhaps for you LLoyds or Soundesign? ::: T .......

225: Vintage Asylum, RE: The Market (0.00)
Posted by sony6060 on 2021-05-04, 05:02:20 (47.26.52.145)
BTW- Onkyo TX-2500 (45 watts per channel) and TX-4500 (60 watts per channel) are great bargains at $200 to $350. Rebuilders on ebay will install all new capacitors including audio grade for $400. The .......

226: Amp/Preamp Asylum, RE: Audiophile Cartoon. (0.00)
Posted by sony6060 on 2021-05-03, 19:51:04 (47.26.52.145)
Funny .......

227: Tubes Asylum, RE: 12AU7 - Need Help ASAP (0.00)
Posted by sony6060 on 2021-05-03, 19:48:11 (47.26.52.145)
Brimar 13D5 long plate is best I heard. Some Brimar are labeled Pinnacle on ebay. .......

228: Vintage Asylum, RE: General findings (0.00)
Posted by sony6060 on 2021-05-03, 09:48:38 (47.26.52.145)
I replace all the capacitors and use audio grade in coupling locations. I have not had an issue with the low noise transistors yet, but if so would upgrade. .......

229: Vintage Asylum, RE: The Market (0.00)
Posted by sony6060 on 2021-05-03, 07:49:43 (47.26.52.145)
BTW- Many 1974 to 1980 receivers use a nasty op-amp in the phono section. Fully discrete receivers are the Pioneer at SX-800 and higher number series. All the Marantz and Onkyo TX-2500 and TX-4500. Ot .......

230: Vintage Asylum, Vintage Receivers- what to look for (0.00)
Posted by sony6060 on 2021-05-03, 07:35:43 (47.26.52.145)
Some vintage receivers sound good and after a rebuild sound excellent. But, the 1974 to 1980s receivers for the most part have an op-amp in the phono-stage. Those early op-amps sound poor. Op-amps .......

231: Tubes Asylum, RE: 12AU7 help,,,, (0.00)
Posted by sony6060 on 2021-05-03, 06:58:56 (47.26.52.145)
USA made RCA 12AU7 clear top has straight slits in the top mica and Made in Mexico has crescent shape slits in the top mica. .......

232: Tweakers' Asylum, RE: Elna Silmic II caps?... (0.00)
Posted by sony6060 on 2021-05-02, 07:37:13 (47.26.52.145)
This is an old post, but IMO the ELNA Silmic II are excellent. I do not hear a hint of treble roll-off as stated. If anything, the Silmic II are on the bright side and extremely clear. .......

233: Amp/Preamp Asylum, RE: REVIEW: Pioneer SX-1000TW - Allied 395 Receiver (0.00)
Posted by sony6060 on 2021-05-02, 06:37:43 (47.26.52.145)
Newer silver face Pioneers (compared to the SX-1000 series) use a poor sounding op-amp in the phono amp. You have to buy SX-850 and higher power models to avoid that bad news op-amp. Any new amp with .......

234: Tubes Asylum, RE: 12AU7 help,,,, (0.00)
Posted by sony6060 on 2021-05-02, 06:34:54 (47.26.52.145)
Two RCA clear top exist. US made and made in Mexico. The USA made are superior, but rare. 12AU7 is not a great tube. RCA knew it and immediately made a more linear tube one year after the 12Au7 was re .......

235: Tube DIY Asylum, RE: @Where is Michael? (0.00)
Posted by sony6060 on 2021-05-02, 06:28:49 (47.26.52.145)
Michael email me. Good to know he is ok. .......

236: Vintage Asylum, RE: pioneer rebuild (0.00)
Posted by sony6060 on 2021-05-01, 05:46:03 (47.26.52.145)
Replace the coupling caps that are usually 10uF with ELNA Silmic II audio grade. These are better sounding vs standard capacitors. .......

237: Vintage Asylum, RE: The Market (0.00)
Posted by sony6060 on 2021-05-01, 05:43:33 (47.26.52.145)
An Allied 395 (Pioneer SX-1000TD) found it way into my home. Produced a small soundstage in stock form, but very clear without that solid-state 'haze'. Haze is like a thin blanket over the speaker. It .......

238: Vintage Asylum, RE: Well (Pioneer) (0.00)
Posted by sony6060 on 2021-04-30, 09:20:02 (47.26.52.145)
Pioneer SX-850 are selling on average for $750 on eBay. .......

239: Amp/Preamp Asylum, RE: REVIEW: Pioneer SX-1000TW - Allied 395 Receiver (0.00)
Posted by sony6060 on 2021-04-30, 08:42:51 (47.26.52.145)
For some reason this Allied 395 (Pioneer SX-1000) just does not have the slight haze of the newer 1970s-80s silver face Pioneers with possible exception of the SX-1010 and higher power Pioneers. Highl .......

240: Tubes Asylum, RE: Excessive bias voltage drift (0.00)
Posted by sony6060 on 2021-04-30, 08:33:03 (47.26.52.145)
The highest grid resistors you can use with fixed bias is 220K on NOS 20 plate dissipation tubes or 180K on newly made tubes. I would use 120K on KT-88, EL34 and 6550 tubes newly made tubes. ::: TOPIC .......

241: Tube DIY Asylum, @Where is Michael? (0.00)
Posted by sony6060 on 2021-04-29, 19:31:22 (47.26.52.145)
I took a few years off. Where is Michael Samra? .......

242: Tube DIY Asylum, RE: Current production 7591As thoughts.... (0.00)
Posted by sony6060 on 2021-04-29, 11:31:28 (47.26.52.145)
I used EH and they sounded & worked well. Sounded as good as NOS. .......

243: Tube DIY Asylum, RE: HK Citation V (0.00)
Posted by sony6060 on 2021-04-29, 11:30:29 (47.26.52.145)
Sometimes manufactured lowered the tube filament voltage for lower noise operation. .......

244: Tube DIY Asylum, RE: Noise on preamp (0.00)
Posted by sony6060 on 2021-04-26, 07:52:02 (47.26.52.145)
It is likely a noisy coupling capacitor. Removing that 1uF is a start. .......

245: Tube DIY Asylum, RE: Noise on preamp (0.00)
Posted by sony6060 on 2021-04-26, 01:19:22 (47.26.52.145)
I do not know if a standard mod. But, all phono stages use perhaps as large as .047uF in this position, most .02uF. 1uF is ridiculous and poor design. .......

246: Tube DIY Asylum, RE: Noise on preamp (0.00)
Posted by sony6060 on 2021-04-25, 23:42:55 (47.26.52.145)
Remove C2. .......

247: Amp/Preamp Asylum, RE: 2SC2240 replace C458 Transistor (0.00)
Posted by sony6060 on 2021-04-25, 11:46:03 (47.26.52.145)
I found a pictorial of the odd Hitachi 2SC458 (C458) case and leads. All set. .......

248: Amp/Preamp Asylum, 2SC2240 replace C458 Transistor (0.00)
Posted by sony6060 on 2021-04-25, 04:04:37 (47.26.52.145)
I have a Allied 395 I am restoring. It been mentioned the C458 transistors should be replaced with 2SC2240. The existing transistors viewed from the front have an angled edge at top. Should the 2SC224 .......

249: Amp/Preamp Asylum, RE: some issues you may encounter; I used to repair these things (0.00)
Posted by sony6060 on 2021-04-24, 19:46:28 (47.26.52.145)
Can you explain .0039uF across the bass controls? Do they replace an existing capacitor, or simply solder across the bass potentiometers? If so, what two pot leads are you referring to? .......

250: Amp/Preamp Asylum, RE: some issues you may encounter; I used to repair these things (0.00)
Posted by sony6060 on 2021-04-24, 06:27:31 (47.26.52.145)
Thanks. I will replace all the capacitors on preamp and driver boards. .......

251: Tubes Asylum, RE: Yep. /n (0.00)
Posted by sony6060 on 2021-04-24, 05:57:01 (47.26.52.145)
Some tubes adjusted for inflation may not cost more today than in the 1960s. But, the Mullard 12AX7 long plate at about $175 today vs $3 in the 1960s is seven (7) times the price adjusted for inflatio .......

252: Amp/Preamp Asylum, RE: REVIEW: Pioneer SX-1000TW - Allied 395 Receiver (0.00)
Posted by sony6060 on 2021-04-21, 19:50:25 (47.26.52.145)
I should have noted the phono amp section is close to flawless and as good as my tube phono amplifier. Never heard that from any solid-state phono amp. .......

253: Amp/Preamp Asylum, REVIEW: Pioneer SX-1000TW - Allied 395 Receiver (0.00)
Posted by sony6060 on 2021-04-21, 19:46:26 (47.26.52.145)
Model: SX-1000TW - Allied 395 Category: Receiver Suggested Retail Price: $265 used Description: Stereo Receiver Manufacturer URL: Pioneer Review by sony6060 on April 21, 2021 at 19:46: .......

254: Vinyl Asylum, RE: Nice table ... (0.00)
Posted by sony6060 on 2021-04-21, 08:02:43 (47.26.52.145)
What is the PD-272 equal to in performance? .......

255: Vinyl Asylum, RE: Nice table ... (0.00)
Posted by sony6060 on 2021-04-21, 07:56:33 (47.26.52.145)
The Luxman PD-272 used to be about $400 refurbished a few years ago. Now about $800 refurbished. Parts only PD-272 are listed for about $400 on ebay- no guarantee of working. Nice deal about the PD-27 .......

256: Vinyl Asylum, RE: When I was a hifi salesman in another century.... (0.00)
Posted by sony6060 on 2021-04-20, 16:36:48 (47.26.52.145)
My TT has standard strobe window. .......

257: Vinyl Asylum, RE: When I was a hifi salesman in another century.... (0.00)
Posted by sony6060 on 2021-04-20, 08:14:45 (47.26.52.145)
Thanks. I like the TT a lot. .......

258: Tube DIY Asylum, RE: +1 nt (0.00)
Posted by sony6060 on 2021-04-20, 08:09:09 (47.26.52.145)
After a choke you can use any value, but diminishing returns using any capacitor higher than 470uF. With 10HY, 100uf is plenty of capacitance. Rough guide is 10HY + 100uF is equal to a 1000uF capacito .......

259: Tube DIY Asylum, RE: Looking for a source for 5 W resistors for PS duty... (0.00)
Posted by sony6060 on 2021-04-20, 08:05:31 (47.26.52.145)
Mouser or Digikey. Use metal film, not carbon type. If voltage exceeds 250 volts across the resistor, use two in series. .......

260: Tube DIY Asylum, RE: Bakelite Sockets (0.00)
Posted by sony6060 on 2021-04-20, 08:03:10 (47.26.52.145)
You can use them, but I prefer ceramic. .......

261: Tube DIY Asylum, RE: Good one! (nt) (0.00)
Posted by sony6060 on 2021-04-20, 08:00:42 (47.26.52.145)
Mouser used to deliver in less than 5 days. Sometimes 3 days. As of the last two months they can take up to two weeks. .......

262: Tubes Asylum, RE: Gold pins (0.00)
Posted by sony6060 on 2021-04-20, 07:58:43 (47.26.52.145)
Gold pins are best for very low voltages such as preamp tubes in the millivolt range. Power tubes use at least 10 volts at the grid. .......

263: Tubes Asylum, RE: Excessive bias voltage drift (0.00)
Posted by sony6060 on 2021-04-20, 07:56:32 (47.26.52.145)
Return the tubes, they are defective- likely gassy. I had good luck with Gold Lion. Forget ebay, buy from a Tube Dealer. .......

264: Tubes Asylum, RE: Rectifier differences (0.00)
Posted by sony6060 on 2021-04-20, 07:50:20 (47.26.52.145)
5AR4s produce too high voltage. Go back to 5U4GB nd for best sound use Tung Sol 5U4GB. .......

265: Tubes Asylum, RE: Something like this. Link. (0.00)
Posted by sony6060 on 2021-04-20, 07:48:00 (47.26.52.145)
Preamp tubes that short rarely cause damage. Power tubes that short can cause damage to the amplifier. .......

266: Tubes Asylum, RE: Tube gear is just like a razor (0.00)
Posted by sony6060 on 2021-04-20, 07:20:23 (47.26.52.145)
If you are 'stuck' with a 12AU7 as a preamp tube, use Brimar 13D5 long plate or CBS/Hytron 5814. .......

267: Vinyl Asylum, Luxman PD-272 Turntable (0.00)
Posted by sony6060 on 2021-04-20, 06:50:52 (47.26.52.145)
I have a Luxman PD-272 with a VM540ML cartridge. It sounds excellent. Far superior to my Sony PX-X70 TT. You know anything about this TT? .......

268: Vinyl Asylum, RE: One of my favorite stations (0.00)
Posted by sony6060 on 2021-04-20, 06:47:26 (47.26.52.145)
Yes and the FM radio stations were much higher sonic quality vs today. Back in the 1960s and early 1970s most radio stations used tubes for low signal amplification. In Detroit the competition was fie .......

269: Tube DIY Asylum, RE: Transformer Interaction - Fact or Fiction? (0.00)
Posted by sony6060 on 2021-04-20, 06:43:13 (47.26.52.145)
The audio and power transformers in the picture are oriented 90 degrees (laminations) to the power transformer and that is correct. .......

270: Tubes Asylum, RE: Current 12AX7 Tubes Recs Needed (0.00)
Posted by sony6060 on 2021-04-20, 06:39:12 (47.26.52.145)
A stunning 12AX7 that outperformed Mullard 12AX7 long plate are GE 12AX7/7025 short plate. I was stunned as the tubes are very low distortion like the Mullard, but are more energetic. They are cheap a .......

271: Tubes Asylum, RE: 6922 tubes (0.00)
Posted by sony6060 on 2021-04-20, 06:36:02 (47.26.52.145)
The best 6922 I heard are RCA 6922 gold pin with Made in Germany marked on box with black ink. There are early 1960s Siemens. .......

272: Tubes Asylum, RE: Best 6SN7 Tubes. In Pre-amp or Amp ? ............... (0.00)
Posted by sony6060 on 2021-04-20, 06:33:40 (47.26.52.145)
BTW- best 6SN7 I heard are Sylvania 6SN7GTA. They are early 1950s tubes. .......

273: Tube DIY Asylum, RE: EXPENSIVE? (0.00)
Posted by sony6060 on 2017-05-07, 04:50:53 (24.127.166.64)
$29.50 for 47uF. That is not expensive for 47uf in a quality cap. If great audio is not important to you, then use a $10 motor run capacitor. .......

274: Tube DIY Asylum, RE: EXPENSIVE? (0.00)
Posted by sony6060 on 2017-05-06, 18:29:46 (24.127.166.64)
Parts Express has the caps cheap. Like $6.75 for 4.7uF as used on a tweeter. Likely cheaper than a motor run. Expensive ????????????? .......

275: Tube DIY Asylum, RE: Motor run capacitors revisited (0.00)
Posted by sony6060 on 2017-05-06, 17:53:25 (24.127.166.64)
Obbligato Paper oil will way outperform motor run caps in crossovers. .......

276: Radio Road, RE: " the consumer is always right' - en masse, you guys did it to yourselves. (0.00)
Posted by sony6060 on 2017-05-03, 13:30:45 (24.127.166.64)
Pandora in USA is not helping FM over here. Many have a TV with surround sound. It is too easy to push a button on the remote. .......

277: Shady Lane, RE: Gary Brown, Stillewater, Partly RIPPED OFF (0.00)
Posted by sony6060 on 2017-05-03, 13:18:11 (24.127.166.64)
Gary Brown could care less he sent wrong transformer and when I said I would keep it vs mailing 27lb item back at my expense he stated 'glad I got rid of it'. You see he had to get it back first actin .......

278: Tube DIY Asylum, RE: Photoflash Capacitors (0.00)
Posted by sony6060 on 2017-04-24, 12:34:11 (24.127.166.64)
Not good for high current ripple, but suffice in amps using up to 250ma. .......

279: Tubes Asylum, RE: 12au7 / 5814 tubes for preamp audition (0.00)
Posted by sony6060 on 2017-04-18, 17:14:03 (24.127.166.64)
Interesting, the RT 12AU7s on ebay are short plate. .......

280: Tubes Asylum, RE: Sylvania 6V6G (0.00)
Posted by sony6060 on 2017-04-18, 12:51:37 (24.127.166.64)
Yes, the Sylvania 6V6G are awesome. .......

281: Tubes Asylum, RE: New Russian Tung Sol 6V6GT best sound? NOT (0.00)
Posted by sony6060 on 2017-04-18, 10:15:52 (24.127.166.64)
Jim, I built the Poindexter amp. Then, I improved it. I sent the info to Eric Kingsbury. He raised the audio transformer primary impedance per my recommendations, but did not follow up with the other .......

282: Vintage Asylum, RE: 1966 Gibson Explorer amp update. (0.00)
Posted by sony6060 on 2017-04-18, 08:27:08 (24.127.166.64)
Nice work as always. Sweet amp too. .......

283: Tubes Asylum, RE: 5AR4/GZ34 (0.00)
Posted by sony6060 on 2017-04-18, 08:24:44 (24.127.166.64)
When I encounter the 6X4 in an amp, I re-punch the socket opening, install a 9 pin socket and change to a EZ80 tube. I do not trust the 6X4 for over 150 volts max. .......

284: Tubes Asylum, New Russian Tung Sol 6V6GT best sound? NOT (0.00)
Posted by sony6060 on 2017-04-18, 08:20:07 (24.127.166.64)
It is mentioned many times the new Russian Tung Sol 6V6GT is as good or better than NOS tubes. At least in a single-ended amp that is not the case. I compared the Tung Sol to a vintage Jan Hytron 6V6 .......

285: Tube DIY Asylum, RE: I don't where Paul puts all this suff i love the way he articulates the message in his videos. (0.00)
Posted by sony6060 on 2017-04-16, 11:48:03 (24.127.166.64)
Sweet transmitter. .......

286: Tubes Asylum, RE: 12au7 / 5814 tubes for preamp audition (0.00)
Posted by sony6060 on 2017-04-16, 11:19:30 (24.127.166.64)
CBS/Hytron 5814 & a little better are Brimar 13D5. These Brimar are branded Pinnacle 13D5 on eBay. .......

287: Vintage Asylum, RE: Recs for Tubes & tweaks for HH Scott gear (0.00)
Posted by sony6060 on 2017-04-15, 17:35:26 (24.127.166.64)
Trade up for a Scott Philharmonic? .......

288: Vintage Asylum, RE: This is fascinating. (0.00)
Posted by sony6060 on 2017-04-15, 17:33:37 (24.127.166.64)
Based upon 55% transmitter efficiency and other station power requirements 500KW output would cost $150 an hour based upon 15 cents per KW per hour. That is $3600 per 24 hours broadcasting. ::: TOPIC: .......

289: Vintage Asylum, RE: This is fascinating. (0.00)
Posted by sony6060 on 2017-04-15, 07:28:55 (24.127.166.64)
Can you imagine the electric bill per hour using a transmitter at 500,000 watts? The input watts is much higher too. Where does a station even get the money for all that equipment? .......

290: Vintage Asylum, RE: Looking for a 2 channel either receiver or amp. and pre-amp here is what I have seen... (0.00)
Posted by sony6060 on 2017-04-15, 07:15:51 (24.127.166.64)
I never heard a SS amp outperform a quality tube amp. But, the best sounding SS amp I heard was a Sony STR-6060. .......

291: Tubes Asylum, RE: Here is something for you guys to try. (0.00)
Posted by sony6060 on 2017-04-15, 07:12:16 (24.127.166.64)
Try a USA built Raytheon 6CG7. It is a great brand. .......

292: Vintage Asylum, RE: 800 dollars for a marantz 7c balance pot? (0.00)
Posted by sony6060 on 2017-04-08, 14:29:44 (24.127.166.64)
Seller states only sounds right with this pot. What a load of BS. .......

293: Vintage Asylum, RE: If it turns out to sound good, prolly keep it. (0.00)
Posted by sony6060 on 2017-04-05, 05:07:30 (24.127.166.64)
Lovely. .......

294: Vintage Asylum, RE: Sprague vs CSC Vitamin Q's (0.00)
Posted by sony6060 on 2017-04-05, 05:05:29 (24.127.166.64)
Every Vit Q I bought said Sprague on the case. There are different Sprague Vit Q capacitors too. .......

295: Tube DIY Asylum, RE: K40y-9 capacitors - highest possible voltage rating for best sound? (0.00)
Posted by sony6060 on 2017-04-05, 05:03:43 (24.127.166.64)
I use K40Y-9 in vintage Fisher rebuilds. I use 200 volt at phone section and 400 volt everywhere else except the power tube grids at 600 volt. My Fisher rebuilds are known for the best sounding and st .......

296: Vintage Asylum, RE: Citation II (0.00)
Posted by sony6060 on 2017-03-18, 08:37:20 (24.127.166.64)
The Citation II is one great amp. Very clean sounding if a tad uneventful. It is a very accurate sounding amp to my ears with the right tubes installed. .......

297: Vintage Asylum, RE: Good input (0.00)
Posted by sony6060 on 2017-03-16, 19:11:56 (24.127.166.64)
I hope you are not talking about Gary Brown in Maine. .......

298: Vintage Asylum, RE: Fisher x101-B Power Transformer needed (0.00)
Posted by sony6060 on 2017-03-15, 15:02:16 (24.127.166.64)
Contact Heyboer Transformer in MI. If you wish, they can make a heavy duty transformer of same size in M6 laminations. .......

299: Shady Lane, RE: Gary Brown, Stillewater, Partly RIPPED OFF (0.00)
Posted by sony6060 on 2017-03-15, 14:59:33 (24.127.166.64)
Thought about it for a 10 days. Yes, he is a hard nosed idiot that could careless about anybody. .......

300: Tubes Asylum, RE: here's a nice... (0.00)
Posted by sony6060 on 2017-03-11, 14:50:56 (24.127.166.64)
Perhaps it was the old late '30s Zenith console radio I had with the G glass 6L6. It was so smooth & open sounding. .......

301: Vintage Asylum, RE: I'll find out once the tech... (0.00)
Posted by sony6060 on 2017-03-11, 11:45:05 (24.127.166.64)
Stunning. Too many people overlook the consoles. Perhaps room for it is an issue. .......

302: Vintage Asylum, RE: Exactly! (0.00)
Posted by sony6060 on 2017-03-11, 11:42:07 (24.127.166.64)
Yep, Yamaha .......

303: Tubes Asylum, RE: here's a nice... (0.00)
Posted by sony6060 on 2017-03-11, 11:40:36 (24.127.166.64)
Best sounding 6L6s ever made Michael. .......

304: Vintage Asylum, RE: OoooooH STOCKINGS .......... (0.00)
Posted by sony6060 on 2017-03-06, 13:31:50 (24.127.166.64)
We'll find out who has bigger jugs. .......

305: Vintage Asylum, RE: If anyone is close to this...go now! (0.00)
Posted by sony6060 on 2017-03-06, 13:26:55 (24.127.166.64)
You're kidding right? .......

306: Tube DIY Asylum, RE: OH yes... (0.00)
Posted by sony6060 on 2017-03-06, 13:25:33 (24.127.166.64)
I follow color codes but use older coding such as green for filament, yellow for rectifier filament, red for B+, etc. .......

307: Shady Lane, RE: Gary Brown, Stillewater, ME OK NOT RIPPED OFF (0.00)
Posted by sony6060 on 2017-03-04, 05:59:53 (24.127.166.64)
I sold the transformer on ebay and got my money back. Gary replied he was happy to 'get rid of that piece of junk'. Real cute, huh! .......

308: Shady Lane, Gary Brown, Stillewater, ME OK NOT RIPPED OFF (0.00)
Posted by sony6060 on 2017-03-03, 15:52:30 (24.127.166.64)
I decided this guy is just too much. Wants transformer shipped back. then will ship transformer. If he would ship first, I would return the transformer. 28 lbs back to his address is too expensive. I .......

309: Shady Lane, RE: Ripped off - Gary Brown, Stillewater, ME (0.00)
Posted by sony6060 on 2017-03-02, 14:15:29 (24.127.166.64)
He decided to ship correct transformer after I return hos transformer at $19 shipping. At least he decided the answer 'it is an audio transformer' was not an appropriate answer. I will update this pos .......

310: Shady Lane, RE: Ripped off - Gary Brown, Stillewater, ME (0.00)
Posted by sony6060 on 2017-03-02, 10:01:34 (24.127.166.64)
Yes I have conversed with Gary. After I stated he sent the wrong transformer, he stated 'it is audio transformer'. He did not say I made a mistake or sent the wrong transformer. That is all!. If he re .......

311: Shady Lane, Ripped off - Gary Brown, Stillewater, ME (0.00)
Posted by sony6060 on 2017-03-02, 09:00:00 (24.127.166.64)
Beware of Gary Brown in Stillwater, Maine. He advertised a Peerless 16309 audio transformer for sale on this site. He ships me a different audio transformer and states 'well, it is an audio transforme .......

312: Tube DIY Asylum, Vintage Tubes (0.00)
Posted by sony6060 on 2017-02-28, 07:42:43 (24.127.166.64)
I have/had huge stocks of NOS tubes. 10-20 years ago the sales were brisk. Now-a-days I find much slower sales. Is DIY building much less now than many years ago? .......

313: Tubes Asylum, RE: 12AT7-tubes for Preamp and Poweramp :JJ vs Telefunken NOS (0.00)
Posted by sony6060 on 2017-02-28, 05:45:09 (24.127.166.64)
Personally I find the RCA 12AT7 black or grey plate excellent sounding tubes. I really did not notice any different in the black or grey plate. .......

314: Vintage Asylum, RE: At the flea market (0.00)
Posted by sony6060 on 2017-02-27, 05:21:43 (24.127.166.64)
I would not over $1000 for it. Fisher 400 sounds better at half the price. .......

315: Vintage Asylum, R-648 (0.00)
Posted by sony6060 on 2017-02-19, 17:06:57 (24.127.166.64)
This radio is great on 75 meter AM. It is quieter vs my previous top gun National NC-183D. It is if the signal is out there I can clearly hear it. .......

316: Tubes Asylum, RE: Tung sol 12ax7 vintage black plates? Is the hype true? (0.00)
Posted by sony6060 on 2017-02-17, 05:21:19 (24.127.166.64)
The Tung Sol black plate are very good. I own 1952 era. But, the tall grey RCA plate are superior IMO. The RCA tall black plate sound the same to me, but have a tendency to be less noisy. RCA black pl .......

317: Tube DIY Asylum, RE: Timbre, attacks and releases - yep (0.00)
Posted by sony6060 on 2017-02-16, 09:48:59 (24.127.166.64)
I agree the Russian Teflon is a good capacitor, but is very neutral sounding. I like K40Y-9 better even if not quite as accurate as the Teflon. .......

318: Vintage Asylum, RE: At the end perhaps 5 to 1 when comparing bombers to fighters. (0.00)
Posted by sony6060 on 2017-02-07, 05:52:38 (24.127.166.64)
Very interesting Michael. Tubes are also available on ebay, but expensive. .......

319: Vintage Asylum, RE: At the end perhaps 5 to 1 when comparing bombers to fighters. (0.00)
Posted by sony6060 on 2017-02-05, 12:43:19 (24.127.166.64)
Starting cleaning up face. .......

320: Vintage Asylum, RE: I want one of these WW2 German radios. (0.00)
Posted by sony6060 on 2017-02-05, 10:40:44 (24.127.166.64)
Powered up the R-648 today. Very nice receiver. .......

321: Vintage Asylum, RE: I want one of these WW2 German radios. (0.00)
Posted by sony6060 on 2017-02-05, 06:08:55 (24.127.166.64)
Yes, I own the dusty R-648. I plan to install the AC power supply today. I likely will only use it for 75 meter AM & shortwave listening. I am looking for a the Collins 51J-4 500 KHz IF 3.1 kHz mechan .......

322: Vintage Asylum, RE: I want one of these WW2 German radios. (0.00)
Posted by sony6060 on 2017-02-04, 19:20:22 (24.127.166.64)
Interesting, but in same weight class I am liking this more. .......

323: Tubes Asylum, RE: Anyone heard the ifi iTube 2 ? (0.00)
Posted by sony6060 on 2017-02-03, 15:36:23 (24.127.166.64)
Any simulation of a tube with SS in front or after the tube is not the real thing. SS amplifiers has a sonic veil over the sound vs a real tube amp. I can recognize a 5 tube desk top radio playing vs .......

324: Tubes Asylum, RE: The actual act of tube rolling (0.00)
Posted by sony6060 on 2017-02-02, 15:57:17 (24.127.166.64)
I swap hot. The differences is instant. Great tubes sound good in about all circuits. .......

325: SET Asylum, RE: xaudiomanx. (0.00)
Posted by sony6060 on 2017-02-02, 15:54:57 (24.127.166.64)
One the original post they were around $3K each. I guess the lastest amp is now $7K each. I have no idea how manufactured higher end amps sound. I owly build my own and after 20 years of playing aroun .......

326: Tube DIY Asylum, RE: How about a grid choke that has multiple taps... (0.00)
Posted by sony6060 on 2017-02-02, 10:53:04 (24.127.166.64)
Never thought of a transformer as a volume control. .......

327: SET Asylum, RE: xaudiomanx. (0.00)
Posted by sony6060 on 2017-02-02, 08:31:06 (24.127.166.64)
What is better for less money from an amplifier manufacture is the question. .......

328: Tube DIY Asylum, RE: Grid Choke (0.00)
Posted by sony6060 on 2017-02-02, 06:05:43 (24.127.166.64)
I think I will not install a grid choke. Thanks Dave. .......

329: Tube DIY Asylum, RE: Grid Choke (0.00)
Posted by sony6060 on 2017-02-02, 05:56:54 (24.127.166.64)
I wire the volume pot signal input to the pot 120K and ground the other side. The wiper is the input to next stage. So, would not the grid choke wire in-between the pot ground end and ground to lift a .......

330: Tube DIY Asylum, Grid Choke (0.00)
Posted by sony6060 on 2017-02-01, 13:34:42 (24.127.166.64)
If one does not have any grid resistors except the volume control at the preamp tube grid, has anyone tried a grid choke inserted at the volume control ground side? .......

331: SET Asylum, RE: xaudiomanx. (0.00)
Posted by sony6060 on 2017-02-01, 12:08:03 (24.127.166.64)
Some people have money to burn and know nothing about DIY. So, there are buyers of his amps. Just not for you. .......

332: SET Asylum, RE: xaudiomanx. (0.00)
Posted by sony6060 on 2017-02-01, 09:17:31 (24.127.166.64)
I have no doubt you have better sounding amplifiers. A DIY amp after a few refinements gets tuned to your tastes. I use a PP design that sounds like single ended- go figure. I use the best parts & tu .......

333: Vintage Asylum, RE: Alrighty then (0.00)
Posted by sony6060 on 2017-01-31, 10:29:03 (24.127.166.64)
I never heard a difference in various power cords. I did hear a difference late at night. I assumed the 120 VAC line noise was reduced in my NYC setting after people went to bed. (I left NYC for MI a .......

334: Tube DIY Asylum, RE: Question (0.00)
Posted by sony6060 on 2017-01-29, 15:36:28 (24.127.166.64)
Simple LC section using a 60mH choke and 44000uF capacitor results on .00 AC ripple in 9 volt bias. A 8 ohm resistor & 100uF cap at the filament is less than .001 AC ripple. I do not have a AC ripple .......

335: Tube DIY Asylum, RE: High Performance Regulator ICs (0.00)
Posted by sony6060 on 2017-01-29, 09:57:56 (24.127.166.64)
You can buy a Rod Coleman regulator for $40. How low noise is it? Is this the 'ticket' for 26 tubes? .......

336: Tube DIY Asylum, RE: High Performance Regulator ICs (0.00)
Posted by sony6060 on 2017-01-29, 08:41:56 (24.127.166.64)
Here is a design. How much ripple allowed for the input voltage? Would it be better to increase the 100uF cap at transistor base? How mush capacitance on output? Also, most Darlington transistors h .......

337: Tube DIY Asylum, High Performance Regulator ICs (0.00)
Posted by sony6060 on 2017-01-29, 07:56:16 (24.127.166.64)
If my math is correct, a LM-317 regulator provides a little less than 1mv AC ripple output (80dB rejection). Is there any regulators that can provide 1.5 amps that is quieter? This PS is for a 26 tube .......

338: SET Asylum, RE: Long ago (0.00)
Posted by sony6060 on 2017-01-29, 06:18:56 (24.127.166.64)
The clarity of DIY tube amps is apparent. No SS amps sounds like this. .......

339: Tube DIY Asylum, RE: 26 tube filament ripple (0.00)
Posted by sony6060 on 2017-01-27, 21:24:13 (24.127.166.64)
Why use any regulator. Use bridge into 6uH choke to 20000uF cap and after a 15 ohm resistor a 200uF cap. This set up makes only .001 AC ripple. .......

340: Tube DIY Asylum, RE: 26 tube filament ripple (0.00)
Posted by sony6060 on 2017-01-27, 17:36:36 (24.127.166.64)
Sounds like a great idea and no cathode capacitor. .......

341: Tube DIY Asylum, RE: 26 tube filament ripple (0.00)
Posted by sony6060 on 2017-01-27, 13:18:55 (24.127.166.64)
Ben, I do not get it. Float the filament DC power (no reference to ground) and provide +9 volts from one side of filament & negative to the ground bus? Or, are you saying provide 10.5 VDC + to one sid .......

342: Tube DIY Asylum, RE: 26 tube filament ripple (0.00)
Posted by sony6060 on 2017-01-27, 09:25:01 (198.208.159.19)
Andy, you meant with grid fixed bias you eliminate the cathode capacitor. Right? .......

343: Tube DIY Asylum, 26 tube filament ripple (0.00)
Posted by sony6060 on 2017-01-26, 18:16:53 (24.127.166.64)
I understand this 26 tube must have a DC filament source. Is 1.5 volts with .01 volt AC ripple too high? .......

344: Tubes Asylum, RE: 26 tube (0.00)
Posted by sony6060 on 2017-01-26, 16:43:18 (24.127.166.64)
How do you set up a 26 tube as a preamp? 90 volts, 4.5 volt fixed bias and a 1.5 volt AC filament with center tap to ground? I am willing to use a pair of 26 tubes to replace a 7N7 as a preamp tube. I .......

345: Tube DIY Asylum, RE: Russian K-40 -voltage rating for Bottlehead Amp (0.00)
Posted by sony6060 on 2017-01-26, 04:04:42 (24.127.166.64)
I tested K40Y-9 at high voltage. The caps do not leak until about twice the rated voltage. I would use the caps at rated voltage & exceeding rated voltage for a few seconds. .......

346: Tubes Asylum, RE: I thought all 7N7 tubes were made by Slyvania? (0.00)
Posted by sony6060 on 2017-01-26, 03:59:22 (24.127.166.64)
Some NU 7N7 were made by Sylvania having the angled plates. NU also made round plates. .......

347: Tubes Asylum, RE: Metal base EL34s sounded very good tonight. (0.00)
Posted by sony6060 on 2017-01-25, 17:42:14 (24.127.166.64)
Are ARC poly caps ok? These are not in a metal can such as motor run caps. .......

348: Tubes Asylum, NU 7N7 Round Plate (0.00)
Posted by sony6060 on 2017-01-25, 16:26:15 (24.127.166.64)
Are the NU 7N7 round plate tubes worth pursuing vs the standard Sylvania 7N7 short bottle? .......

349: Tubes Asylum, RE: Metal base EL34s sounded very good tonight. (0.00)
Posted by sony6060 on 2017-01-25, 03:41:44 (24.127.166.64)
Those are very serious EL34s. Fine audio transformers too. .......

350: Tube DIY Asylum, RE: Such a bargain. (0.00)
Posted by sony6060 on 2017-01-25, 03:32:14 (24.127.166.64)
Such BS IMO. .......

351: Vintage Asylum, RE: For "High Current" Amps, Absolutely ! For Vintage Preamps, Maybe... (0.00)
Posted by sony6060 on 2017-01-22, 13:00:28 (198.208.251.22)
Although I never found a failure, they are grossly inefficient and must go. Used in amplifier bias circuits, bias is the most important parameter. New solid-state diodes will last forever. ::: TOPIC:: .......

352: Tubes Asylum, RE: 5R4G and 5U4G condenser output value (0.00)
Posted by sony6060 on 2017-01-21, 12:15:52 (198.208.159.19)
10-12uF should be safe for either tube. Newer 5U4GB are rated 40uF and 5R4GB rated 20uF. .......

353: Tube DIY Asylum, RE: Michael- Peerless 16309 Output Transformer Power Output (0.00)
Posted by sony6060 on 2017-01-21, 11:29:03 (198.208.159.19)
In the Heathkit W5m manual it shows the power output at different levels in a graph. At 15 watts and higher distortion is too high to accurately measure output per Heathkit. I believe this is a great .......

354: Tube DIY Asylum, RE: Old potentiometer ,,, taper? (0.00)
Posted by sony6060 on 2017-01-21, 07:05:42 (198.208.251.21)
Linear .......

355: Tube DIY Asylum, RE: Ground.. (0.00)
Posted by sony6060 on 2017-01-20, 11:50:27 (24.127.166.64)
Ground is simple, no schematic needed. I place a separate ground wire across the chassis on ceramic standoffs. Connect all transformer leads at far end. Next, I connect audio transformer grounds. Rest .......

356: Tube DIY Asylum, RE: 20 Watts Triode (0.00)
Posted by sony6060 on 2017-01-19, 18:40:06 (24.127.166.64)
I have an idea. The metal 6L6 is the most linear 6L6 ever made. The 6L6G 6L6GB & 6L6GC are different tubes and not as linear. The 6L6 metal tube is similar to 6V6 in triode. At 350 volts plate you wou .......

357: Tube DIY Asylum, Why not build 6V6 Triode (0.00)
Posted by sony6060 on 2017-01-19, 18:25:01 (24.127.166.64)
8x 6V6 per channel is 24 watts triode & 48 watts tetrode. 6V6G tubes are so expensive, but you can buy Sylvania CHS 7C5 (same Sylvania 6V6G tube). Do not buy non CHS Sylvania 7C5. The Sylvania CHS 7C .......

358: Tube DIY Asylum, RE: 6V6 & Heathkit W5m Peerless 16309 Output Transformer (0.00)
Posted by sony6060 on 2017-01-19, 18:04:51 (24.127.166.64)
6 watts RMS triode out, 12 watts RMS tetrode out. Have not decided if I will install a triode/tetrode switch. .......

359: Tube DIY Asylum, RE: 6V6 & Heathkit W5m Peerless 16309 Output Transformer (0.00)
Posted by sony6060 on 2017-01-19, 18:01:00 (24.127.166.64)
Oh, thought you believed 6V6 suck. 6V6 can suck in a lousy amp like any tube can in a lousy amp. I suspect this 6V6 amp is going to be great with the Peerless 16309 audio transformers. .......

360: Tube DIY Asylum, RE: 6V6 & Heathkit W5m Peerless 16309 Output Transformer (0.00)
Posted by sony6060 on 2017-01-19, 17:42:20 (24.127.166.64)
6V6 triode is better than 45 tubes. Like others stated, 6V6 triode are great. You must have had some really bad 6V6 amps with tiny open frame audio transformers. .......

361: Tube DIY Asylum, RE: Fixed bias problem "fixed" or when it rains it pours. (0.00)
Posted by sony6060 on 2017-01-19, 16:45:02 (24.127.166.64)
A bad transformer is freaky. Usually lasts a 100 years or more. .......

362: Tubes Asylum, RE: I'm thinking no (0.00)
Posted by sony6060 on 2017-01-19, 16:32:52 (24.127.166.64)
Not exactly. Tube life is like 1/2 a bell curve. At 75% the tube may fall off good readings fast without warning. A 75% tube also can sound a bit soft losing the great sonics of a newer tube. So you w .......

363: Tubes Asylum, RE: Question about tube clearance in shelves (0.00)
Posted by sony6060 on 2017-01-19, 10:44:07 (24.127.166.64)
12AX7s produce very little heat. Top shelf is fine for that phono amp. .......

364: Tubes Asylum, RE: Question about tube clearance in shelves (0.00)
Posted by sony6060 on 2017-01-19, 08:58:37 (24.127.166.64)
IMO I would not worry about it. The aluminum plate keeps heat off of the wood cabinet & tubes have enough air circulation. Heating from the 6550 tubes would be less than a 40 watt light bulb. That is .......

365: Tube DIY Asylum, RE: 6V6 & Heathkit W5m Peerless 16309 Output Transformer (0.00)
Posted by sony6060 on 2017-01-19, 06:39:10 (24.127.166.64)
PPP 6V6 is completed with Dynaco ST-70 transformers. This is a new PP 6V6 build with Heathkit W5m transformers. .......

366: Tube DIY Asylum, RE: Should be more than fine (0.00)
Posted by sony6060 on 2017-01-18, 18:41:20 (24.127.166.64)
I had to look up FWIW. For what it is worth. .......

367: Tube DIY Asylum, RE: 6V6 & Heathkit W5m Peerless 16309 Output Transformer (0.00)
Posted by sony6060 on 2017-01-18, 16:21:10 (24.127.166.64)
I tried a PP 45 amp built identical to a PP 6V6 triode connected amp. Everything the same and the 6V6 sounded better. The 6V6 sounded more immediate & engaging plus had the same clarity of the 45 amp. .......

368: Tube DIY Asylum, RE: Should be more than fine (0.00)
Posted by sony6060 on 2017-01-18, 15:45:30 (24.127.166.64)
PP 6V6 at 310 volt plate gives 6 watts output with 8K ohm plate to plate audio transformer. .......

369: Vintage Asylum, RE: I may be wrong but (0.00)
Posted by sony6060 on 2017-01-18, 10:00:03 (24.127.166.64)
It requires a very good amplifier, speakers and source to accurately recreate concert hall reverb correctly. .......

370: Tube DIY Asylum, 6V6 & Heathkit W5m Peerless 16309 Output Transformer (0.00)
Posted by sony6060 on 2017-01-18, 08:46:16 (24.127.166.64)
The PPP 6V6 amp posted a week ago is for my son. I am building a PP 6V6 triode connected amp for myself. What do you think of the Peerless 16309? Any experience? It is the 'smaller' nickel core stripe .......

371: Tube DIY Asylum, RE: Phase Inverter Bias Voltage (0.00)
Posted by sony6060 on 2017-01-18, 08:04:10 (24.127.166.64)
The phase splitter does not have a typical capacitor on the one grid going to ground. It is grounded directly. Due to this does not the negative 140 volts place the tube in a proper balance? ::: TOPIC .......

372: Tube DIY Asylum, RE: Phase Inverter Bias Voltage (0.00)
Posted by sony6060 on 2017-01-17, 15:17:19 (24.127.166.64)
What would happen if I increase or decrease the -140 volts? .......

373: Tube DIY Asylum, Phase Inverter Bias Voltage (0.00)
Posted by sony6060 on 2017-01-17, 10:36:22 (24.127.166.64)
In the schematic what occurs (bias, balance, etc) adjusting the phase inverter resistance up or down at the 25.5K resistor? .......

374: Vintage Asylum, RE: McIntosh "Samra Style" (0.00)
Posted by sony6060 on 2017-01-17, 08:12:05 (24.127.166.64)
I have tried the Mundroff silver/oil. A slight harshness in the mids & highs. I went back to K40Y-9. .......

375: Tubes Asylum, Re: Uncle Mike (0.00)
Posted by sony6060 on 2017-01-17, 08:09:37 (24.127.166.64)
Uncle Mike. I want best sound for my amps. I need to roll all tubes. I have progressed over the last 20 years. Any tube amp does not get it. In fact, only DIY for me. .......

376: Vintage Asylum, RE: McIntosh "Samra Style" (0.00)
Posted by sony6060 on 2017-01-17, 03:38:38 (24.127.166.64)
I never heard a coupling capacitor that sounds better than those K40Y-9 that Michael recommends. As for preamp tubes I would recommend RCA 12AX7 tall grey plate, Brimar 13D5 for 12AU7 and I have no id .......

377: Tubes Asylum, RE: Tube rolling preamp or power amp gain tubes, which ones (or both)? (0.00)
Posted by sony6060 on 2017-01-17, 03:33:18 (24.127.166.64)
I find the preamp tubes have slightly more effect on sonics. But, both preamp & power amp tubes are important. Even the rectifier tube makes a difference & I do not know why. .......

378: Tube DIY Asylum, RE: Where to find large value uf film caps ? (0.00)
Posted by sony6060 on 2017-01-17, 03:26:22 (24.127.166.64)
Are you sure you need 100uF? Most preamp tubes have lower than 20Hz response with 25uF. You could likely use 20uF and have 20Hz response. Many poly caps are rated at 10uF. Use two 10uF capacitors. If .......

379: Tube DIY Asylum, RE: Opinions please: need recommendations for a Triode driver for a 2a3 (0.00)
Posted by sony6060 on 2017-01-16, 17:43:08 (24.127.166.64)
6J5G round plate if it has enough gain. .......

380: Tube DIY Asylum, RE: LOL, Didn't last long, under two months (0.00)
Posted by sony6060 on 2017-01-16, 17:32:40 (24.127.166.64)
Tried both single and dual power supplies. I agree, I like just one power supply. .......

381: Tube DIY Asylum, RE: 6V6 Amp- my design vs drlowmu design (0.00)
Posted by sony6060 on 2017-01-16, 06:58:44 (24.127.166.64)
Interesting. At Electron One transformer tests the Z-565 had about a perfect square wave output and the Peerless had overshoot on the square wave test. The Z565 are $190 a pair and the Peerless is abo .......

382: Vintage Asylum, RE: Pilot SA260 amp Power Transformer toast? (0.00)
Posted by sony6060 on 2017-01-15, 13:19:53 (24.127.166.64)
I meant .5 to 1.0 ohm on primary, not 5 to 10 ohm. Follow Michaels experience and order a new Heyboer transformer. .......

383: Vintage Asylum, RE: Pilot SA260 amp Power Transformer toast? (0.00)
Posted by sony6060 on 2017-01-15, 13:00:58 (24.127.166.64)
Appears you did not tag the wires properly. You should measure around 5 to 10 ohms on the 120 volt winding. .......

384: Vintage Asylum, RE: These are the right adapters if you want to run 6CG7s in the MAC amps in place of the 12au7s. (0.00)
Posted by sony6060 on 2017-01-15, 12:58:45 (24.127.166.64)
The 6CG7 is a more linear tube. It sounds better. .......

385: Tube DIY Asylum, RE: Fixed bias problem, and no, it is not the tubes. (0.00)
Posted by sony6060 on 2017-01-15, 07:12:40 (24.127.166.64)
My bias supplies. Note the poly type capacitors that last forever. I use two bias supplies. -19 volts for power 6V6GT tubes & -140 volts for the phase inverters. With bias the phase inverters do no .......

386: Tube DIY Asylum, RE: Fixed bias problem, and no, it is not the tubes. (0.00)
Posted by sony6060 on 2017-01-15, 07:06:48 (24.127.166.64)
I would rebuild the entire bias supply and use a new 6.3 volt @ 1 amp transformer as well. Those tiny caps in the picture look cheap anyways. Use 250 volt rated capacitors. .......

387: Vintage Asylum, RE: Ohhhh the pain :) -nt (0.00)
Posted by sony6060 on 2017-01-15, 06:24:34 (24.127.166.64)
I think 6CG7s sound better anyways. .......

388: Vintage Asylum, RE: These are the right adapters if you want to run 6CG7s in the MAC amps in place of the 12au7s. (0.00)
Posted by sony6060 on 2017-01-14, 19:29:47 (24.127.166.64)
From a sonic standpoint the adapters would be a good idea. Now, those rare Raytheon 6CG7s. .......

389: Vintage Asylum, RE: Try this (0.00)
Posted by sony6060 on 2017-01-14, 07:05:59 (24.127.166.64)
Michael is right, color codes looks like a power transformer. .......

390: Vintage Asylum, RE: Would 7355 OPTs work for PP triode 6AQ5? (0.00)
Posted by sony6060 on 2017-01-13, 17:31:13 (24.127.166.64)
S-15 10000K primary to 8 ohm would work. .......

391: Vintage Asylum, RE: Would 7355 OPTs work for PP triode 6AQ5? (0.00)
Posted by sony6060 on 2017-01-13, 14:33:04 (24.127.166.64)
Dynaco Z-565 output transformers would be great. .......

392: Tube DIY Asylum, RE: It's not the tubes! (0.00)
Posted by sony6060 on 2017-01-13, 12:41:27 (24.127.166.64)
Well with a change in high frequencies per original post order Sylvania 6SN7GTA, The 'GTA' guarantees 1950-1953 era tubes. These tubes are ultra clear sounding unlike a lot of other 6SN7s and has nice .......

393: Tubes Asylum, RE: Bendix 6106 vs 5Y3GT (0.00)
Posted by sony6060 on 2017-01-12, 19:38:05 (24.127.166.64)
I do not find any issue on warm up time. Like a guitar amp turned on with the standby switch in standby and then switch on the B+ even an hour later causes no damage. .......

394: Tube DIY Asylum, RE: 6V6 Amp- my design vs drlowmu design (0.00)
Posted by sony6060 on 2017-01-12, 13:41:29 (24.127.166.64)
Z565 are one of the best audio transformers ever built. .......

395: Tube DIY Asylum, RE: 6V6 Amp- my design vs drlowmu design (0.00)
Posted by sony6060 on 2017-01-12, 13:28:22 (24.127.166.64)
M6 lamination power transformer was custom built by Heyboer Transformer. M6 provides more power output in smaller package vs standard power transformer M19 laminations. The output transformers are Dyn .......

396: Tube DIY Asylum, RE:Here is a photo of the bottom amp (0.00)
Posted by sony6060 on 2017-01-11, 22:32:44 (24.127.166.64)
My bias supplies use a three section filter and a filter capacitor on the output voltage adjustment pot. It produces less than .001 volt AC ripple. I use 3K dropping resistors. At 140-160 volts initia .......

397: Tube DIY Asylum, RE: 6V6 Amp- my design vs drlowmu design (0.00)
Posted by sony6060 on 2017-01-11, 22:09:26 (24.127.166.64)
BTW- The shielding is called Giron. It will take the transformer and choke down to about zero AC field with two layers. I might as well have the power transformer & choke a 100 feet from the chassis. .......

398: Tube DIY Asylum, 6V6 Amp- my design vs drlowmu design (0.00)
Posted by sony6060 on 2017-01-11, 21:05:18 (24.127.166.64)
I built this amp as monoblocks before. Sounded good. A lot more thought went into this amp that is not apparent in the picture. Being PP type, symmetrical is very important and more so than your SE am .......

399: Tube DIY Asylum, RE: Fixed bias problem, and no, it is not the tubes. (0.00)
Posted by sony6060 on 2017-01-11, 19:30:09 (24.127.166.64)
Bad resistors in the bias supply series (dropping voltage) circuit. Have a schematic or picture? .......

400: Vintage Asylum, RE: what driver tube to use when running PP Triode 6AQ5s? (0.00)
Posted by sony6060 on 2017-01-11, 15:30:45 (24.127.166.64)
Here is a triode PPP 6V6 I am building. .......

401: Vintage Asylum, RE: what driver tube to use when running PP Triode 6AQ5s? (0.00)
Posted by sony6060 on 2017-01-11, 13:34:38 (24.127.166.64)
You cannot beat USA manufactured Raytheon 6CG7 black plate, but are rare & almost all used are unbalanced due to hard use in TV sets. An alternate are Sylvania 6SN7GTA. The Sylvania have a hotter high .......

402: Vintage Asylum, RE: what driver tube to use when running PP Triode 6AQ5s? (0.00)
Posted by sony6060 on 2017-01-11, 12:58:42 (24.127.166.64)
I like USA manufactured Raytheon 6CG7, but that lower gain tube needs a preamp. I use 1/2 a section of another Raytheon 6CG7 as a preamp. If using just one driver/phase splitter only, I would use a 12 .......

403: Vintage Asylum, RE: Do you want to see a brilliant move? (0.00)
Posted by sony6060 on 2017-01-11, 07:09:41 (24.127.166.64)
I have seen that. 100 miles away in MI and goes to PA first. .......

404: Tubes Asylum, RE: Ping: Michael Samra (0.00)
Posted by sony6060 on 2017-01-10, 08:25:36 (24.127.166.64)
Thanks Michael. I thought I give you a try. I have enough for my project, but wanted spares. I will find them, It may take a year on ebay. I found one NOS Raytheon on ebay, one NOS in obscure tube dea .......

405: Tubes Asylum, Ping: Michael Samra (0.00)
Posted by sony6060 on 2017-01-09, 09:41:32 (24.127.166.64)
Michael, do you have any NOS USA Raytheon 6CG7 black plate tubes you are willing to let go? I need up to three. .......

406: Tubes Asylum, RE: Genalex tubes who to buy from (0.00)
Posted by sony6060 on 2017-01-08, 10:58:36 (24.127.166.64)
If current manufacture tube, seriously look no further than Jim McShane. Every tube is carefully tested by Jim. .......

407: Tube DIY Asylum, RE: Grid Stopper Resistors. (0.00)
Posted by sony6060 on 2017-01-08, 09:03:35 (24.127.166.64)
Ok Paul. The 6SN7 transconductance is about 2700 & the 6V6GT is 5000. I will add grid stoppers to the 6V6. The 6SN7 does not need grid stoppers. .......

408: SET Asylum, RE: Ping- drlowmu (0.00)
Posted by sony6060 on 2017-01-07, 17:22:48 (24.127.166.64)
Thanks .......

409: Tube DIY Asylum, RE: DIY amplifier for current hungry speakers question. (0.00)
Posted by sony6060 on 2017-01-07, 16:02:17 (24.127.166.64)
Tilte states a DIY amplifier. I would use four KT88 per channel with 525 volts plate and 300 volts screen for 120 watts per channel amplifier. I would use Lundahl LL1693 audio transformers and a 6SN7 .......

410: Radio Road, RE: Goodbye analog FM - at least in Norway! (0.00)
Posted by sony6060 on 2017-01-07, 15:45:50 (24.127.166.64)
No way a digital signal will outplay analog. You cannot even install a Shiitt or similar digital to analog converter to remove jitter. .......

411: Tube DIY Asylum, Grid Stopper Resistors. (0.00)
Posted by sony6060 on 2017-01-07, 11:42:35 (24.127.166.64)
Ultra high gain tubes need grid stopper resistors. Typical value is 1K carbon comp resistors. What about low gain such as a 6SN7 tube & would a grid stopper alter the sound? Or 6V6GT power tubes in te .......

412: Tube DIY Asylum, RE: DIY PPP 6V6 Amp (0.00)
Posted by sony6060 on 2017-01-07, 11:38:34 (24.127.166.64)
I have enough filament power. I will try 2x RCA 5V3A. .......

413: Tubes Asylum, RE: Dunno about that (0.00)
Posted by sony6060 on 2017-01-07, 05:52:59 (24.127.166.64)
Likely a cathode to filament short. .......

414: Vintage Asylum, RE: I haven't bought amps in a while but I did get this and you will see why. (0.00)
Posted by sony6060 on 2017-01-06, 16:49:25 (24.127.166.64)
Punchy 6BQ5 audio. It should sound great with lots of reserve. .......

415: Vintage Asylum, RE: I haven't bought amps in a while but I did get this and you will see why. (0.00)
Posted by sony6060 on 2017-01-06, 16:27:06 (24.127.166.64)
Find another for stereo. .......

416: Tube DIY Asylum, RE: DIY PPP 6V6 Amp (0.00)
Posted by sony6060 on 2017-01-06, 13:54:34 (24.127.166.64)
Actually RCA 5V4G. I run in parallel due to high current draw of amp. I use a choke input PS with 5Hy @ 500ma choke & a true paper/oil cap. RCA 5V4G sounds better than a Mullard GZ34 per a few audioph .......

417: Vintage Asylum, RE: E-Stat (0.00)
Posted by sony6060 on 2017-01-06, 13:18:49 (24.127.166.64)
You do not accept emails. .......

418: Tube DIY Asylum, RE: DIY PPP 6V6 Amp (0.00)
Posted by sony6060 on 2017-01-06, 12:32:19 (24.127.166.64)
9 pin sockets should be here today. It uses three Raytheon 6CG7. Two phase splitters and one preamp. .......

419: Vintage Asylum, RE: E-Stat (0.00)
Posted by sony6060 on 2017-01-06, 12:29:25 (24.127.166.64)
What vintage TT would you recommend for $500-$800? My kid needs a starter TT. .......

420: Tube DIY Asylum, DIY PPP 6V6 Amp (0.00)
Posted by sony6060 on 2017-01-06, 12:18:04 (24.127.166.64)
Started the PPP 6V6 Triode connected amplifier. Draws a fair amount of B+ current at 360ma. .......

421: Vintage Asylum, RE: AR Turntable (0.00)
Posted by sony6060 on 2017-01-06, 07:16:43 (24.127.166.64)
Besides a vintage Garrard 301 or 401 what's left? .......

422: Tube DIY Asylum, RE: Potentiometer - Volume Pot (0.00)
Posted by sony6060 on 2017-01-04, 19:21:32 (24.127.166.64)
An op-amp would destroy the sound of the amp. .......

423: Tube DIY Asylum, RE: Potentiometer - Volume Pot (0.00)
Posted by sony6060 on 2017-01-04, 18:52:10 (24.127.166.64)
Exactly Eli. I am wanting 100K pot feeding a single section of a 6CG7. BTW- I have a 50K pot. Is 50K better for a 6CG7? .......

424: Tube DIY Asylum, RE: Potentiometer - Volume Pot (0.00)
Posted by sony6060 on 2017-01-04, 18:27:27 (24.127.166.64)
Pot is directly across the input jack. .......

425: Tubes Asylum, RE: Sorry Sony it was not clear, the OP was speaking about the Bugle Boy logo. nt (0.00)
Posted by sony6060 on 2017-01-04, 18:24:57 (24.127.166.64)
BB logo does not mean amp comes with BB tubes. In fact where would the manufacture find that many NOS BB? .......

426: Tube DIY Asylum, RE: You are now entering guitar part world (0.00)
Posted by sony6060 on 2017-01-04, 16:59:28 (24.127.166.64)
No dual concentric pots at Percy Audio or Parts Connextion. Thanks Eli, will shunt with carbon film. .......

427: Tube DIY Asylum, RE: TKD makes stereo 100K volume pots. (0.00)
Posted by sony6060 on 2017-01-04, 16:01:36 (24.127.166.64)
I visited the TKD site. No dual concentric pots. .......

428: Tube DIY Asylum, Potentiometer - Volume Pot (0.00)
Posted by sony6060 on 2017-01-04, 12:09:40 (24.127.166.64)
I am building a stereo amplifier. Instead of using a balance pot, I am using a dual concentric audio taper potentiometer having independent volume control for each channel. Only pot I could find is du .......

429: Tube DIY Asylum, RE: choke in ground leg (0.00)
Posted by sony6060 on 2017-01-04, 09:13:26 (24.127.166.64)
There is an article in one of the older 1950s ARRL Handbooks (ham radio) about negative lead choke installation. For low current applications such as a preamp it induces some extra low level noise vs .......

430: Vintage Asylum, RE: Turning on older SS gear after storage (0.00)
Posted by sony6060 on 2017-01-04, 07:57:59 (24.127.166.64)
Although not the best way, I just turn on the SS at full voltage. SS gear does not have very high voltages. However, tube gear that has much higher voltages I will ramp up on a variac. .......

431: Vintage Asylum, RE: vintage equipment with power cord docked, will you still buy it?? (0.00)
Posted by sony6060 on 2017-01-04, 07:54:25 (24.127.166.64)
It all depends upon price and other cosmetic condition. I would like to own a Marantz model 8B. If cord was bad, amp cosmetics good & has the tubes I would buy it for $1500 in a second. Retail price .......

432: Tube DIY Asylum, RE: 6V6 Amp Feedback....Start Over Please (0.00)
Posted by sony6060 on 2017-01-04, 07:42:40 (24.127.166.64)
The feedback is just in the tetrode operating position. Triode connection does not have feedback. Simply want 30 watts for outdoor parties, 15 watts in triode is a little too low power for that. ::: T .......

433: Tube DIY Asylum, RE: PS choke voltage ratings (0.00)
Posted by sony6060 on 2017-01-04, 07:39:26 (24.127.166.64)
For 25 volts over limit I would not worry about it. If the choke is insulated from ground, voltage can go higher. For safety reasons, insulated chokes should be under a chassis with a bottom plate to .......

434: Tube DIY Asylum, RE: 6V6 Amp Feedback....Start Over Please (0.00)
Posted by sony6060 on 2017-01-03, 16:50:56 (24.127.166.64)
15K, not 80K used on 16 ohm tap for feedback. .......

435: Tube DIY Asylum, RE: Can someone please do a check run on psud2 for me? (0.00)
Posted by sony6060 on 2017-01-03, 16:08:56 (24.127.166.64)
Looks good to me. Tried to save image as a picture, but did not save. .......

436: Tubes Asylum, RE: Jim, I would respectfully disagree......... (0.00)
Posted by sony6060 on 2017-01-03, 10:16:11 (24.127.166.64)
I do not get the rip off statement. All new amps have the cheapest new manufactured (not NOS) tubes installed. Picture clearly shows Russian getters in tubes. .......

437: Tube DIY Asylum, RE: 6V6 Amp Feedback....Start Over Please (0.00)
Posted by sony6060 on 2017-01-03, 07:58:16 (24.127.166.64)
The design is completed with best components including solid silver wire. I think 80pF shunted with 80K resistor is a good feedback circuit for 16 ohm audio transformer tap to input tube cathode. I ca .......

438: Tube DIY Asylum, RE: Yes, damper diodes for B+ (0.00)
Posted by sony6060 on 2017-01-02, 10:53:28 (24.127.166.64)
I use poly type capacitors for bias when room permits. It does require 3-4 sections of filtering using 10uF capacitors. But, the poly type capacitors lasts forever. .......

439: Vintage Asylum, RE: Too far gone? (0.00)
Posted by sony6060 on 2017-01-02, 10:50:13 (24.127.166.64)
Rubbish .......

440: Tubes Asylum, RE: Shuguang Treasure KT88-Z vs PSVane KT88T with Cary (0.00)
Posted by sony6060 on 2017-01-02, 06:35:07 (24.127.166.64)
Order RCA 6922 with gold pins and 'Made in Germany' stamped in black ink on box. These are early 1960s Siemens tube and are very good sounding. Order Sylvania 6SN7GTA. The 'A' after the 'GT' guarantee .......

441: Tubes Asylum, RE: Now I Need Rectifier Help! (0.00)
Posted by sony6060 on 2017-01-01, 13:01:20 (24.127.166.64)
Great. .......

442: Tubes Asylum, RE: REVIEW: Raytheon 6CG7 Tubes (0.00)
Posted by sony6060 on 2017-01-01, 12:47:34 (24.127.166.64)
Siemens CCa is likely the best tube ever made. .......

443: Tube DIY Asylum, RE: 6V6 Amp Feedback....Start Over Please (0.00)
Posted by sony6060 on 2017-01-01, 11:57:34 (24.127.166.64)
Back to original question. I am now using one section of 6CG7 to drive 6CG7 phase invertor as shown in first schematic. First section 6CG7 tube uses 50K plate resistors, 1.2K cathode resistor (no by p .......

444: SET Asylum, RE: Ping- drlowmu (0.00)
Posted by sony6060 on 2017-01-01, 10:45:12 (24.127.166.64)
I found DH Labs 23ga solid silver wire. .......

445: SET Asylum, RE: Ping- drlowmu (0.00)
Posted by sony6060 on 2017-01-01, 10:13:20 (24.127.166.64)
Thanks. .......

446: Tubes Asylum, RE: Now I Need Rectifier Help! (0.00)
Posted by sony6060 on 2017-01-01, 09:00:17 (24.127.166.64)
What brand of 274B? .......

447: SET Asylum, RE: Ping- drlowmu (0.00)
Posted by sony6060 on 2017-01-01, 07:47:30 (24.127.166.64)
BTW- The wire is silver plated copper or solid silver? .......

448: SET Asylum, RE: Ping- drlowmu (0.00)
Posted by sony6060 on 2017-01-01, 07:21:45 (24.127.166.64)
Ok, I will follow your instructions. Thanks. .......

449: Vintage Asylum, RE: Stereo Sub-Woofers (0.00)
Posted by sony6060 on 2017-01-01, 06:33:56 (24.127.166.64)
I used two subs 15 years ago using expensive Peerless 10" subwoofers and two Parts Express 120 watt plate amps. It sounded ok, but I suspect the plate amps were not best quality. Now a days, the newe .......

450: SET Asylum, RE: Best 5U4G rectifier (0.00)
Posted by sony6060 on 2017-01-01, 06:16:11 (24.127.166.64)
I second the Tung Sol 5U4GB top getter. It is as good as the RCA 5U4G in a smaller package. .......

451: SET Asylum, Ping- drlowmu (0.00)
Posted by sony6060 on 2017-01-01, 06:09:24 (24.127.166.64)
What wiring do you use for signal input from RCA jacks to first input amp tube. Can I use a multi input RCA jacks with a Centralab selector switch. This JX series switch has 15 amp rated button contac .......

452: Tubes Asylum, REVIEW: Raytheon 6CG7 Tubes (0.00)
Posted by sony6060 on 2016-12-31, 10:18:29 (24.127.166.64)
Model: 6CG7 Category: Tubes Suggested Retail Price: $15-20 Description: Raytheon 6CG7 Black Plate Manufacturer URL: Not Available Review by sony6060 on December 31, 2016 at 10:18:29 IP .......

453: Tube DIY Asylum, RE: Expertise required for diy 6SN7-6SJ7-6V6 amp (0.00)
Posted by sony6060 on 2016-12-31, 08:43:52 (24.127.166.64)
I would build the 'El Cheapo' designed by Eli. Schematic is posted under 6V6 Feedback post a few days ago. Ask Eli to change to PPP (four output tubes per channel). It would make about 12 watts output .......

454: Tube DIY Asylum, RE: Expertise required for diy 6SN7-6SJ7-6V6 amp (0.00)
Posted by sony6060 on 2016-12-30, 16:57:51 (24.127.166.64)
Yes better. But, use one 6SJ7 per channel vs the two (parallel 6SJ7) per channel. Where are you sourcing an audio transformer with a cathode winding? Only transformer I seen like that is old Hammond o .......

455: Tubes Asylum, RE: Now I Need Rectifier Help! (0.00)
Posted by sony6060 on 2016-12-30, 14:00:20 (24.127.166.64)
I would skip the 274B and use Tung Sol 5U4GB. Best 5U4 I ever heard. I suspect they will sound better than the new 274Bs. .......

456: Tube DIY Asylum, RE: 6V6 Amp Feedback (0.00)
Posted by sony6060 on 2016-12-30, 13:36:10 (24.127.166.64)
Eli, you are right. Not enough gain. I will use 1/2 a Raytheon 6CG7 driving a 6CG7 per channel using the LTP phase splitters. I have enough tube stock. BTW- when rebuilding Fisher 400/500B/500C/800 re .......

457: Tube DIY Asylum, RE: 6V6 Amp Feedback (0.00)
Posted by sony6060 on 2016-12-29, 21:13:55 (24.127.166.64)
Triode Kingdom. It is a home entertainment amp. Using PPP 6V6GT, I am using Dynaco ST70 audio transformers. I think they are called model 470. These transformers fair very good on tests. Some state 43 .......

458: Tube DIY Asylum, RE: 6V6 Amp Feedback (0.00)
Posted by sony6060 on 2016-12-29, 21:01:43 (24.127.166.64)
Eli, do you have the Music Machine later schematic? I rolled a lot of phase splitter tubes & found the USA Raytheon 6CG7 an unbelievable sounding tube. I am using a two RCA 5V4G as parallel rectifiers .......

459: Tube DIY Asylum, RE: Expertise required for diy 6SN7-6SJ7-6V6 amp (0.00)
Posted by sony6060 on 2016-12-29, 18:00:02 (24.127.166.64)
This amp sounds extremely good. Use four 6V6 per channel vs the two 6V6 shown. .......

460: Tube DIY Asylum, 6V6 Amp Feedback (0.00)
Posted by sony6060 on 2016-12-29, 17:54:47 (24.127.166.64)
Amp schematic is shown in triode mode and with two 6V6 per channel. I will use four 6V6 per channel. I am told if a switch is used to apply B+ to the 6V6 screens for tetrode connected, I need a fee .......

461: Tube DIY Asylum, RE: Something to keep in mind when wiring an amp for triode. (0.00)
Posted by sony6060 on 2016-12-28, 15:07:37 (24.127.166.64)
Here is schematic .......

462: Tube DIY Asylum, RE: Something to keep in mind when wiring an amp for triode. (0.00)
Posted by sony6060 on 2016-12-28, 14:42:45 (24.127.166.64)
BTW- I went to Resistive Coupled Amplifier chart in old RCA tube manual. At voltage I saw on chart on my 6CG7 tube plate and close to plate resistor values, it showed 27 volts output with 1 volt input .......

463: Tube DIY Asylum, RE: Something to keep in mind when wiring an amp for triode. (0.00)
Posted by sony6060 on 2016-12-28, 14:39:37 (24.127.166.64)
Eric used a 5965 driver/phase splitter. I used a 6CG7. I used parallel PP 6V6 (four 6V6 per channel). He used PP 6V6. I built this PPP 6V6 before using a 6CG7 and it worked as good as any tube amp I e .......

464: Tube DIY Asylum, RE: Something to keep in mind when wiring an amp for triode. (0.00)
Posted by sony6060 on 2016-12-28, 14:00:15 (24.127.166.64)
OK, what values feedback components to driver/phase splitter cathode from 16 ohm tap on output transformers? Make it light feedback due to the input to the phase inverter is all the gain I have (no pr .......

465: Vintage Asylum, RE: Cat Scan completed. (0.00)
Posted by sony6060 on 2016-12-28, 07:32:22 (24.127.166.64)
Sitting on a wheel barrow inter tube can help a lot. .......

466: Vintage Asylum, RE: The Schotky Cree diodes make a tremendous difference in every place I have used them. (0.00)
Posted by sony6060 on 2016-12-28, 07:06:42 (24.127.166.64)
Like different rectifier tubes make a sonic difference, I am sure solid-state diodes would also make a difference. .......

467: Tube DIY Asylum, RE: Something to keep in mind when wiring an amp for triode. (0.00)
Posted by sony6060 on 2016-12-28, 06:53:14 (24.127.166.64)
How about switchable PPP 6V6GT triode to tetrode without feedback? Kind of like the Music Machine from Eric Kingsbury, but driver/splitter is a 6CG7. .......

468: Vintage Asylum, RE: merry Christmas! (0.00)
Posted by sony6060 on 2016-12-27, 07:11:08 (24.127.166.64)
Yes, slant 6. .......

469: Tubes Asylum, RE: My favorite...Brimar 13D5 (0.00)
Posted by sony6060 on 2016-12-27, 07:06:09 (24.127.166.64)
I believe these tubes are listed on ebay as Pennicle. They are Brimar 13D5 and take top spot for best sounding 12AU7 or 5814. .......

470: Tubes Asylum, RE: Switches will wear out on you. (0.00)
Posted by sony6060 on 2016-12-26, 18:55:53 (24.127.166.64)
Perhaps I will use the switch to turn on the rectifier tube filaments. .......

471: Tubes Asylum, RE: How about this. (0.00)
Posted by sony6060 on 2016-12-26, 18:11:05 (24.127.166.64)
I could do that with a B+ switch. .......

472: Tubes Asylum, RE: It is easy to check for yourself (0.00)
Posted by sony6060 on 2016-12-26, 16:39:50 (24.127.166.64)
I am using 6V6GT tubes .......

473: Tubes Asylum, RE: It is easy to check for yourself (0.00)
Posted by sony6060 on 2016-12-26, 11:55:55 (24.127.166.64)
The amp is in the design stage. With choke input power supply, I do not want the B+ to rise as a capacitor input power supply. The power tubes warm up in 11 seconds. If 5V4 is 10 seconds, the partial .......

474: Tubes Asylum, 5V4 Warm up Time (0.00)
Posted by sony6060 on 2016-12-26, 06:37:13 (24.127.166.64)
Anyone measure a 5V4 warm up time? It is not specified anywhere. .......

475: Vintage Asylum, RE: Ping Danny R (0.00)
Posted by sony6060 on 2016-12-25, 10:50:49 (24.127.166.64)
I was managing a different project, but a part of the shop rebuilt CRTs back in the early 1980s, They rebuilt about 20 at a time every day. It was in Tucson, AZ. .......

476: Vintage Asylum, RE: Look what Santa dropped off yesterday (0.00)
Posted by sony6060 on 2016-12-25, 10:28:34 (24.127.166.64)
Nice. .......

477: Vintage Asylum, RE: merry Christmas! (0.00)
Posted by sony6060 on 2016-12-25, 10:26:28 (24.127.166.64)
Thanks. My vintage car. .......

478: Tubes Asylum, RE: experience with tube vendors (0.00)
Posted by sony6060 on 2016-12-25, 10:21:08 (24.127.166.64)
www.vacuumtubes.net are usually cheaper than ebay & others. Specify NOS as they started to sell some used. They have the largest supply of tubes in the world, but do not have exotic tubes such as Cca, .......

479: Tubes Asylum, RE: Fed up with old stock 12AX7 RCAs dying or becoming microphonic! (0.00)
Posted by sony6060 on 2016-12-23, 07:40:12 (24.127.166.64)
Yes Michael, the RCA 12AX7 tall plate are great. You hear any difference in-between tall black plate & tall grey plate? .......

480: Tubes Asylum, RE: Fed up with old stock 12AX7 RCAs dying or becoming microphonic! (0.00)
Posted by sony6060 on 2016-12-22, 10:10:28 (24.127.166.64)
Jim, I may have heard the earlier first run Genelex 12AX7. My ears are falling off sensitive wise on high end frequencies. I heard to 12000Hz. My amp is unique and tubes sounds different in different .......

481: Tubes Asylum, RE: Fed up with old stock 12AX7 RCAs dying or becoming microphonic! (0.00)
Posted by sony6060 on 2016-12-22, 09:29:05 (24.127.166.64)
The Genelex sounded more ordinary vs the RCA that had more black in-between instruments and the singer(s) voices. Just a better soundstage & clarity. My amp is DIY with triode connected PPP 6V6 tubes. .......

482: Vintage Asylum, RE: I really appreciate all the kind words in this time of healing for me (0.00)
Posted by sony6060 on 2016-12-22, 08:52:54 (24.127.166.64)
Hate is say it, but if CBS 12DW7 cannot be found, I would rather use a 12AX7 phase inverter for best sound. Been there, done that. .......

483: SET Asylum, RE: 2A3 Options (0.00)
Posted by sony6060 on 2016-12-22, 08:50:17 (24.127.166.64)
I agree with the Doc. He has more experience than most. I use only choke input power supplies and not higher than about 20-25 ohm choke resistance. I only use paper/oil caps for filtering. New Obbliga .......

484: Tubes Asylum, RE: Fed up with old stock 12AX7 RCAs dying or becoming microphonic! (0.00)
Posted by sony6060 on 2016-12-22, 08:34:11 (24.127.166.64)
The RCA tall plate are a shame they go microphonic or are noisy. I had too many noise issues with NOS RCA 12AX7 tall black plate. The black plate just do not last long with regard to noise. I find no .......

485: Tube DIY Asylum, Phase Inverter Resistors (0.00)
Posted by sony6060 on 2016-12-22, 08:12:38 (24.127.166.64)
At the phase invertor that directly drives the power tubes does the resistor type make much difference in the amplifiers sonic signature? I was thinking using carbon film Riken vs some ordinary cheap .......

486: Vintage Asylum, RE: What are some of the worst integrated amps you've had (0.00)
Posted by sony6060 on 2016-12-20, 11:43:26 (24.127.166.64)
I do not remember having a bad sounding integrated amp or receiver, but tube was much better after rebuilding with upgrades over solid-state. Worst piece of equipment was Dynaco PAS-3 preamp. Could no .......

487: Vintage Asylum, RE: Sherwood S-5000 (0.00)
Posted by sony6060 on 2016-12-20, 11:35:28 (24.127.166.64)
I see K40y-9 on the power tube grids. You cannot beat that capacitor for great sonics. Believe it or not, becoming rare in some values. .......

488: Tubes Asylum, RE: Sylvania 6922 vs orange globe 6DJ8 (0.00)
Posted by sony6060 on 2016-12-20, 11:27:33 (24.127.166.64)
My favorite 6DJ8/6922 are RCA 6922 with gold pins. Box is stamped in black ink 'Made in Germany'. The tubes are early 1960s Siemens and suspected with the Cca .028 diameter grid. .......

489: Tweakers' Asylum, RE: safety margin (0.00)
Posted by sony6060 on 2016-12-13, 08:21:12 (24.127.166.64)
It was fairly common that ham radio operators that built electronics used diodes rated 2.8x the secondary transformer voltage. It was written in ARRL Ham Radio books as a minimum safe design. Dennis H .......

490: SET Asylum, RE: Best 5U4G rectifier (0.00)
Posted by sony6060 on 2016-12-12, 08:05:25 (198.208.251.21)
The simple RCA 5U4G sounded great to my ears. .......

491: Vintage Asylum, RE: Replace all teh PSU caps, replace the PSU diodes with Schottkys, and then listen. (0.00)
Posted by sony6060 on 2016-12-12, 06:35:21 (24.127.166.64)
Frankly, I never heard a SS receiver outperform a good tube receiver. Best I ever heard in SS are the all discrete design (no op amp) Sony STR-6060FW. .......

492: Vintage Asylum, RE: This was an amazing deal Dave got on this receiver. (0.00)
Posted by sony6060 on 2016-12-12, 06:32:11 (24.127.166.64)
Best tube receiver ever made. .......

493: Vintage Asylum, RE: LOOK HERE EVERYONE))VINTAGE. (0.00)
Posted by sony6060 on 2016-12-12, 06:28:57 (24.127.166.64)
Looks like a good design. Huge power transformer is a plus. Not sure what lays under the audio transformers potted can. 12AT7 is a good sounding tube. 12AU7 phase invertors not the best sounding tube, .......

494: Vintage Asylum, RE: Brass faced Fisher tube rectified integrated EL84 amps... (0.00)
Posted by sony6060 on 2016-12-12, 06:08:49 (24.127.166.64)
I like the early amp. Cant lose with a tube rectifier and good sounding 12AX7s. Unfortunately the on the later amp the only good sounding 12DW7 I heard are extremely rare CBS manufacture. .......

495: Vintage Asylum, RE: Dynaco A-25 crossover capacitor (0.00)
Posted by sony6060 on 2016-12-07, 07:10:22 (24.127.166.64)
Obbligato paper foil in oil are great capacitors for crossovers. Around $6 each at Parts Connexion. .......

496: Tubes Asylum, RE: Old_Guy_Radiola (0.00)
Posted by sony6060 on 2016-12-06, 17:36:56 (24.127.166.64)
What an Asshole. I buy nothing from this jerk. .......

497: Vintage Asylum, RE: Phase Splitter Tubes (0.00)
Posted by sony6060 on 2016-12-02, 14:20:51 (24.127.166.64)
I am not sure I would go with 6U8 or 12DW7 phase splitters. Any 12AU7 as in 1/2 of the 12DW7 are not good sounding tubes. I know a phase splitter is not as critical as preamp circuits, but every tube .......

498: Speaker Asylum, RE: You want the best tweeter for $50 (0.00)
Posted by sony6060 on 2016-12-01, 06:32:46 (24.127.166.64)
If affordable to an audiophile, I agree the Seas is a great tweeter. .......

499: Speaker Asylum, Ultra Cheap Good Sounding Speaker (0.00)
Posted by sony6060 on 2016-12-01, 05:19:59 (24.127.166.64)
Believe it or not, a Bose 201 series III speaker make for a very good sounding speaker when the tweeter & coupling capacitor is upgraded. The 6.5" speaker has no bass/mid crossover and gently slopes o .......

500: SET Asylum, RE: Utter Nonsense (0.00)
Posted by sony6060 on 2016-12-01, 05:10:14 (24.127.166.64)
Hammond organ made a PPP 2A3 amplifier used in tone cabinets. They used to be fairly common a few years ago. It will likely take a year to find two amplifiers on ebay now. .......

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