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Tube DIY Asylum Do It Yourself (DIY) paradise for tube and SET project builders. |
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Tube DIY Asylum Do It Yourself (DIY) paradise for tube and SET project builders. |
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In Reply to: Is this amp's output set to Class AB1 or A? posted by FenderLover on May 4, 2016 at 07:10:26:
Steve
Not 235 per tube,it's 235 per pair of tubes..If you use separate resistors for each tube,you double the resistance.
What Eico did in one of the channels was to put in a 165 ohm resistor in series with the lone 12AX7 filament to be able to power the filament with DC from the cathode voltage.I always eliminate that and put AC on fil pins 4,5,and9 as opposed to Eico's half ass setup.
"For every complex problem there is an answer that is clear, simple, and wrong" H. L. Mencken
Edits: 05/06/16
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Follow Ups
- RE: Is this amp's output set to Class AB1 or A? - Michael Samra 09:37:24 05/04/16 (10)
- Cathode-Powered Filaments - Triode_Kingdom 10:57:33 05/04/16 (9)
- I have yet to understand why. HK did the same thing, and it's very effective. - Michael Samra 11:08:48 05/06/16 (1)
- RE: I have yet to understand why. HK did the same thing, and it's very effective. - Triode_Kingdom 13:20:36 05/06/16 (0)
- RE: Cathode-Powered Filaments - maxhifi 22:23:51 05/04/16 (0)
- Understanding why... - Steve O 12:18:12 05/04/16 (5)
- RE: Understanding why... - DAK 13:16:29 05/04/16 (4)
- If you are talking about an integratd amp - Michael Samra 11:29:06 05/06/16 (1)
- RE: No, its a power amp... - DAK 13:15:21 05/06/16 (0)
- Not surprising... - Steve O 14:02:23 05/04/16 (1)
- RE: Not surprising... - Triode_Kingdom 14:24:37 05/04/16 (0)
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