RE: 6AQ5 PP amps

Posted by Eli Duttman (A) on April 10, 2014 at 18:29:59

In Reply to: RE: 6AQ5 PP amps posted by BofService on April 10, 2014 at 11:41:26:

The needs of the 12AT7 small signal circuitry rule the roost. The 'T7 triode sounds GOOD with 200 to 225 V. on the plate and an I_B of 3 mA. A B+ rail of 355 V. takes care of "everything", if you keep "check valve" decoupling. The drop in the decoupling network shown is under 2 V.

The B- rail voltage is pretty flexible. It has to be "tall" enough to power the CCS and provide "compliance" with the drive signal. The B- setup shown on the graphic is very economical, along with starting "softly", which keeps the 'T7 grids from becoming positive relative to the cathodes. Builders in "240" VAC power zones will have to work out another B- supply scheme.

Eli D.

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Follow Ups Full Thread

Topic - 6AQ5 PP amps - ecline6 14:01:52 04/08/14 (21)

RE: 6AQ5 PP amps - amnesiac 23:15:37 04/09/14 (1)

A question becomes.... - drlowmu 00:44:12 04/13/14 (0)

You can use almost any driver tube and rectifier with that tube. - Ralph 10:43:29 04/09/14 (0)

RE: 6AQ5 PP amps - drlowmu 08:30:16 04/09/14 (10)

RE: 6AQ5 PP amps - ecline6 14:29:22 04/09/14 (9)

RE: 6AQ5 PP amps - Caucasian Blackplate 15:08:04 04/10/14 (1)

+1 - drlowmu 08:52:09 04/12/14 (0)

RE: 6AQ5 PP amps - RC Daniel 18:54:33 04/09/14 (6)

RE: 6AQ5 PP amps - Eli Duttman 23:12:55 04/09/14 (5)

RE: 6AQ5 PP amps - RC Daniel 22:01:17 04/10/14 (3)

FYI ... - danlaudionut 00:32:57 04/11/14 (0)

RE: 6AQ5 PP amps - Eli Duttman 22:52:07 04/10/14 (1)

RE: 6AQ5 PP amps - drlowmu 20:45:05 05/01/14 (0)

What Eli said... absolutely agree best sounding push pull I have* - Cleantimestream 09:40:30 04/10/14 (0)

6AQ5 is a good front end tube - PakProtector 03:31:35 04/09/14 (0)

RE: 6AQ5 PP amps - Gingertube 16:05:29 04/08/14 (5)

RE: 6AQ5 PP amps - danlaudionut 22:45:34 04/08/14 (4)

RE: 6AQ5 PP amps - Eli Duttman 23:42:02 04/09/14 (3)

RE: 6AQ5 PP amps - BofService 11:41:26 04/10/14 (1)

RE: 6AQ5 PP amps - Eli Duttman 18:29:59 04/10/14 (0)

RE: 6AQ5 PP amps - ecline6 05:05:16 04/10/14 (0)

Follow Ups

RE: 6AQ5 PP amps - Eli Duttman 18:29:59 04/10/14 (0)

RE: 6AQ5 PP amps

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