Hammond Galore Part 2-GM70

Posted by deafbykhorns (A) on May 29, 2015 at 17:10:24

Don't know if any of you read my previous post about the ton of Hammond iron I aquired to experiment with. I also have some 2-300b's, 4-GM70's and 6bl7's along with some Rod Coleman boards for 300b and transmitting tubes.
I already have a really nice 2A3 I built 5 or 6 years ago and want to step it up and use some higher voltage with more output for another listening room I have. That being said, I have modeled several diagrams over the past 6 months. These are a culmination of my studies and experimentation. What do you think, here's 3 of them just to get started.
I have another half dozen or more, many with fixed bias but thought I would start out with keeping the power supply simple(well almost). I haven't adjusted all the caps yet on these diagrams....
The last one is just to step up the output since I have the giant Hammond 1642SE 75w OPT.
Has anyone tried something similar, maybe with a pentode driver? I do have some EL34's as well but don't know where to start with these.
I'm just an amateur so be easy.....

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Topic - Hammond Galore Part 2-GM70 - deafbykhorns 17:10:24 05/29/15 (23)

RE: Hammond Galore Part 2-GM70 - drlowmu 09:09:39 06/01/15 (0)

RE: Hammond Galore Part 2-GM70 - Eli Duttman 17:31:56 05/29/15 (21)

RE: Dumping the parallel idea... - deafbykhorns 16:55:58 05/31/15 (3)

RE: Dumping the parallel idea... - Eli Duttman 19:45:55 05/31/15 (2)

RE: Dumping the parallel idea... - deafbykhorns 17:37:30 06/01/15 (1)

RE: Dumping the parallel idea... - Eli Duttman 19:54:39 06/01/15 (0)

Fixed bias - Triode_Kingdom 23:37:48 05/29/15 (2)

RE: Fixed bias - Eli Duttman 05:37:49 05/30/15 (1)

RE: Fixed bias - Triode_Kingdom 10:48:21 05/30/15 (0)

RE: Hammond Galore Part 2-GM70 - deafbykhorns 18:02:23 05/29/15 (13)

RE: Hammond Galore Part 2-GM70 - deafbykhorns 19:52:02 05/29/15 (10)

RE: Hammond Galore Part 2-GM70 - drsx 22:42:18 05/29/15 (1)

RE: Hammond Galore Part 2-GM70 - dave slagle 07:31:04 05/30/15 (0)

RE: Hammond Galore Part 2-GM70 - dave slagle 20:52:04 05/29/15 (7)

RE: Thank you for the explanation, - deafbykhorns 19:22:04 05/30/15 (6)

RE: Thank you for the explanation, - dave slagle 10:34:29 05/31/15 (5)

RE: Is this what you had in mind? - deafbykhorns 17:36:20 06/02/15 (3)

RE: Is this what you had in mind? - dave slagle 08:16:29 06/03/15 (2)

RE: Yeah, it dawned on me after I posted it... - deafbykhorns 18:20:06 06/04/15 (1)

RE: Yeah, it dawned on me after I posted it... - dave slagle 06:50:20 06/05/15 (0)

RE: I need to study...direct coupling - deafbykhorns 16:51:37 05/31/15 (0)

RE: Hammond Galore Part 2-GM70 - Caucasian Blackplate 19:20:42 05/29/15 (0)

RE: Hammond Galore Part 2-GM70 - Eli Duttman 18:38:38 05/29/15 (0)

Hammond Galore Part 2-GM70

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