In Reply to: Or could it bee the "COMPACT" ... posted by MQracing on April 9, 2004 at 13:36:06:
I have a few reservations about using a multigrid valve sitting on a common cathode CCS. THe g2 curents will do some screwey things. Rig the valves up as triodes and it goes away. Or use single-grid triodes.
I raised this issue with Allen Wright( I think, memory not what I remember it being a while ago...). He had a KT88 amp with a CCS in the cathode circuit, and noticed the same thing, g2 stuff doing screwey things.
It is a PP amp, make no mistage about it. Rigged with the high gain 6336( 6528?), I suspect a really neat amp, capable of 15 watts would be possible. It would take a bit of drive voltage, and 10x the g1-a capacitance for that valve is no joke...
regards,
Douglas
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Follow Ups
- the "COMPACT" ... - Sector-7G 20:30:48 04/09/04 (18)
- Re: the "COMPACT" ... - Scholl 07:31:11 04/10/04 (17)
- CCS and common cathode - Sector-7G 09:38:45 04/10/04 (16)
- interesting - Scholl 17:31:20 04/10/04 (15)
- Re: interesting - Paul Barker 01:47:40 04/12/04 (14)
- Re: interesting - Scholl 04:29:47 04/12/04 (13)
- Re: interesting - Henry Pasternack 19:41:35 04/12/04 (10)
- Re: interesting - Scholl 07:12:11 04/13/04 (9)
- Re: interesting - Henry Pasternack 11:20:59 04/13/04 (8)
- Re: interesting - MQracing 14:15:49 04/13/04 (7)
- Re: interesting - Henry Pasternack 16:11:56 04/13/04 (3)
- Re: interesting - MQracing 18:04:41 04/13/04 (2)
- Re: interesting - Henry Pasternack 20:37:06 04/13/04 (1)
- Re: interesting - arend-jan 00:42:18 04/14/04 (0)
- Paul, please correct me if I'm wrong... - Scholl 14:46:07 04/13/04 (2)
- Re: Paul, please correct me if I'm wrong... - MQracing 15:27:04 04/13/04 (1)
- Some preliminary tests - Scholl 08:01:58 04/15/04 (0)
- Re: interesting - Paul Barker 10:51:28 04/12/04 (0)
- Is this even a true diff amps? - Allen Wright 10:13:59 04/12/04 (0)