I've posted about my single ended triode amplifier in the past. It's got a Mullard EF37A driving a JJ 2A3-40, with a 6CA4 rectifier and a CLC power supply.
Output transformers are Sowter SP-02, and power transformer is a re purposed RCA Victor console stereo transformer.
I shuffled this amp into and out of my system over the years, because although it sounded good with some types of music I could never get good synergy with any speakers. It wasn't powerful enough for my Tannoys, and I never really thought it got the best from my La Scalas either.
I recently rebuilt some Sansui SP-3005 speakers into brand new cabinets, and decided just to try the SET amplifier. The synergy is unbelievable... finally I "get" what all the fuss is about.
Just for some fun, anyone have suggestions about another kind of 2A3 besides the JJs I could use? Seems like a pretty easy Christmas gift to buy myself, and I wouldn't mind having some spare tubes now that I know this amplifier will finally get some miles on it.
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Topic - 2A3 Options - maxhifi 10:23:30 12/21/16 (44)
- RE: 2A3 Options - KR Audio? - maxhifi 09:33:47 01/04/17 (0)
- RE: 2A3 Options - 91derlust 12:30:02 12/22/16 (30)
- 15 watts dissipation - drlowmu 15:16:49 12/22/16 (20)
- 2A3-S is a 28W tube, not 15W. - 91derlust 00:06:42 12/23/16 (19)
- Indeed it is... - Ivan303 07:25:14 12/23/16 (18)
- RE: Indeed it is... - drlowmu 08:56:15 12/23/16 (17)
- I said it was designed to accommodate Chinese 2.5 V 300B's... - Ivan303 21:51:58 12/23/16 (0)
- Dennis talks 2A3... post-RMAF 2016 - 91derlust 12:31:51 12/23/16 (15)
- RE: Dennis talks 2A3... post-RMAF 2016 - drlowmu 17:51:18 12/23/16 (14)
- RE: Dennis talks 2A3... post-RMAF 2016 - 91derlust 20:22:10 12/23/16 (13)
- RE: Dennis talks 2A3... post-RMAF 2016 - Tre' 20:02:04 12/24/16 (11)
- RE: Dennis talks 2A3... post-RMAF 2016 - dave slagle 07:25:12 12/25/16 (10)
- RE: Dennis talks 2A3... post-RMAF 2016 - Tre' 09:10:37 12/25/16 (9)
- RE: Dennis talks 2A3... post-RMAF 2016 - dave slagle 09:23:26 12/25/16 (8)
- RE: Dennis talks 2A3... post-RMAF 2016 - Tre' 09:56:21 12/25/16 (7)
- RE: Dennis talks 2A3... post-RMAF 2016 - dave slagle 16:54:54 12/25/16 (6)
- While we're busy 'interjecting'... - Ivan303 17:44:24 12/25/16 (4)
- RE: While we're busy 'interjecting'... - dave slagle 08:42:57 12/26/16 (3)
- And I guess if you HAVE to parallel plates... - Ivan303 15:08:48 12/26/16 (1)
- RE: And I guess if you HAVE to parallel plates... - dave slagle 17:26:17 12/26/16 (0)
- RE: While we're busy 'interjecting'... - drlowmu 14:18:44 12/26/16 (0)
- RE: Dennis talks 2A3... post-RMAF 2016 - Tre' 17:08:53 12/25/16 (0)
- RE: Dennis talks 2A3... post-RMAF 2016 - drlowmu 08:40:14 12/24/16 (0)
- Thank you! - maxhifi 12:45:55 12/22/16 (8)
- RE: Thank you! - Mr_Steady 06:01:29 12/23/16 (1)
- RE: Thank you! - maxhifi 12:22:42 12/23/16 (0)
- I think that is a good idea... - 91derlust 00:29:22 12/23/16 (1)
- Maximum Rg for jj2A3-40 fixed bias? - maxhifi 23:47:28 12/24/16 (0)
- RE: Thank you! - tube wrangler 21:49:42 12/22/16 (3)
- RE: Thank you! - Tre' 21:11:01 12/24/16 (1)
- BTW - Tre' 21:13:52 12/24/16 (0)
- Question.... - drlowmu 18:10:11 12/23/16 (0)
- RE: 2A3 Options - drlowmu 15:05:32 12/21/16 (9)
- RE: 2A3 Options - sony6060 08:50:17 12/22/16 (8)
- RE: 2A3 Options - 91derlust 12:19:49 12/22/16 (6)
- Paper in Oil - maxhifi 13:08:16 12/22/16 (5)
- This style is what I meant - maxhifi 13:28:15 12/23/16 (3)
- RE: This style is what I meant - 91derlust 01:53:22 12/25/16 (2)
- RE: This style is what I meant - maxhifi 05:53:24 12/25/16 (1)
- I'll check it out - thanks! nt. - 91derlust 12:22:14 12/25/16 (0)
- I have some for... - 91derlust 01:10:45 12/23/16 (0)
- RE: 2A3 Options - maxhifi 11:15:21 12/22/16 (0)
- RE: 2A3 Options - tube Tom 12:45:52 12/21/16 (1)
- RE: 2A3 Options - maxhifi 13:12:57 12/21/16 (0)