In Reply to: Schade feedback or RH amp with fixed bias? posted by DAK on January 23, 2016 at 00:44:04:
No reason why fixed bias can't be used on the output tube. Other than the resistance coupling to the grid, there is no path to the rest of the circuit that does not go through a cap.Read the Blog attached.
These types of pentode based feedback circuits were developed as a cheaper way to get linear power.
Edits: 01/23/16
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Follow Ups
- RE: Schade feedback or RH amp with fixed bias? - Chip647 07:57:50 01/23/16 (14)
- RE: Schade feedback or RH amp with fixed bias? - DAK 08:15:41 01/23/16 (13)
- RE: Schade feedback or RH amp with fixed bias? - Chip647 09:16:03 01/23/16 (12)
- RE: I have been using the LM317 on low power amps - DAK 10:39:35 01/23/16 (11)
- LM317 Failure - Triode_Kingdom 22:19:54 01/23/16 (7)
- RE: LM317 Failure - Caucasian Blackplate 12:54:27 01/24/16 (0)
- RE: LM317 Failure - DAK 22:48:16 01/23/16 (5)
- RE: LM317 Failure - Triode_Kingdom 08:34:18 01/24/16 (4)
- RE: It is the RH universal amp. - DAK 09:41:31 01/24/16 (3)
- RE: It is the RH universal amp. - Triode_Kingdom 12:07:20 01/24/16 (2)
- RE: I tried it in a PPP EL84 amp.... - DAK 12:53:55 01/24/16 (1)
- RE: I tried it in a PPP EL84 amp.... - Triode_Kingdom 16:12:33 01/24/16 (0)
- RE: I have been using the LM317 on low power amps - JKT 12:07:12 01/23/16 (2)
- RE: I have been using the LM317 on low power amps - DAK 18:17:11 01/23/16 (0)
- RE: I am very interested - DAK 14:22:46 01/23/16 (0)