We were discussing the Fisher 50a which is pretty similar to the 55a

Posted by Michael Samra (D) on August 29, 2016 at 21:12:51

The 55a uses GZ34s but can use 5V4s as well but also uses 6550/KT88s. Notice the .01uf cap going into the choke right off the rectifiers.Being it is so little,I don't think that can legitimately disqualify this from being a choke input circuit.I wonder its fundamental purpose because it's not going to remove any residual AC that would make any change in the DC voltage?
"For every complex problem there is an answer that is clear, simple, and wrong" H. L. Mencken

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Topic - We were discussing the Fisher 50a which is pretty similar to the 55a - Michael Samra 21:12:51 08/29/16 (18)

one 12AU7 triode as bias voltage regulator - FenderLover 09:42:55 08/30/16 (3)

RE: one 12AU7 triode as bias voltage regulator - Michael Samra 13:41:56 08/30/16 (2)

Thanks! - FenderLover 20:35:50 08/30/16 (1)

RE: Thanks! - Michael Samra 11:27:33 08/31/16 (0)

RF Bypass - Triode_Kingdom 08:45:43 08/30/16 (12)

RE: RF Bypass - JKT 16:49:48 08/30/16 (8)

RE: RF Bypass - Triode_Kingdom 19:39:45 08/30/16 (0)

That what my guess in that it was for spike suppression. - Michael Samra 17:23:07 08/30/16 (6)

RE: That what my guess in that it was for spike suppression. - JKT 18:17:38 08/30/16 (5)

RE: That what my guess in that it was for spike suppression. - Michael Samra 19:51:16 08/30/16 (4)

RE: That what my guess in that it was for spike suppression. - JKT 20:17:55 08/30/16 (3)

I noticed on these amps... - FenderLover 21:04:39 08/30/16 (2)

This other article. - FenderLover 21:06:24 08/30/16 (1)

RE: This other article. - Michael Samra 11:22:52 08/31/16 (0)

THere is a difference in the 50a to 55a - Michael Samra 13:16:50 08/30/16 (2)

Not as different as they might seem... - Triode_Kingdom 14:02:30 08/30/16 (1)

RE: Not as different as they might seem... - Michael Samra 16:51:13 08/30/16 (0)

.67 is the demarcation line for choke loading... above .68 and is no longer choke input~nT - Cleantimestream 07:54:00 08/30/16 (0)

We were discussing the Fisher 50a which is pretty similar to the 55a

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