In Reply to: Yes, they are smaller. posted by Stephæn on April 4, 2013 at 19:47:37:
You also found that 2a3 filament transformer has a centertap and there is no hum pot. This arrangement may result in a bit of hum through the speakers. I had to disconnect that filament transformer centertap and install a humpot - silence.
Overall WPA 3.5 are an incredible value little amps. At some point I had an idea to re-create these amps on a non-magnetic chassis with updated 6n1p driver...Just the chassis and iron alone would cost me more than I paid for these amps with tubes included...
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Follow Ups
- RE: Yes, they are smaller. - Abacus Music 13:16:11 04/05/13 (9)
- Thanks for reminding me of that ... - Stephæn 11:29:53 04/08/13 (8)
- Upgrade from Sovtek? - dvb 12:09:15 04/08/13 (7)
- RE: Upgrade from Sovtek? - Stephæn 13:02:49 04/08/13 (6)
- Got the hum pots, done the tranny mod - dvb 13:18:42 04/08/13 (5)
- RE: Got the hum pots, done the tranny mod - Abacus Music 07:39:49 11/29/13 (0)
- Sorry for the misunderstanding. - Stephæn 13:34:16 04/08/13 (3)
- RE: Sorry for the misunderstanding. - Abacus Music 05:54:41 04/09/13 (0)
- 2A3 upgrade path - dvb 16:52:35 04/08/13 (1)
- RE: 2A3 upgrade path - Stephæn 17:10:27 04/08/13 (0)