If you are talking about an integratd amp

Posted by Michael Samra (D) on May 6, 2016 at 11:29:06

In Reply to: RE: Understanding why... posted by DAK on May 4, 2016 at 13:16:29:

and you want to power the preamp tubes with DC filaments,that would make more sense but I never understood putting DC filaments in any part of an amplifier unless it's for DHTs.
You then have the change in bias over time like Steve mentioned below so that will change the voltage on the filaments as output tubes lose emission over time.
"For every complex problem there is an answer that is clear, simple, and wrong" H. L. Mencken

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Follow Ups Full Thread

Topic - What cathode current should I set my EL34? - DAK 00:43:45 05/04/16 (15)

RE: What cathode current should I set my EL34? - Michael Samra 03:30:00 05/04/16 (14)

RE: The amp is a custom build w/Dynaco A420 OPT - DAK 10:44:17 05/04/16 (0)

Is this amp's output set to Class AB1 or A? - FenderLover 07:10:26 05/04/16 (12)

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)

RE: Is this amp's output set to Class AB1 or A? - PakProtector 08:40:29 05/04/16 (0)

Follow Ups

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)

If you are talking about an integratd amp

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