In Reply to: So what have I got wrong this time? posted by vinnie2 on May 24, 2016 at 08:48:37:
Maybe there is some ultrasonic oscillation when two tubes are in (i.e. undesired global positive feedback through power supply).
From a theoretical point of view only two AC coupled stages are unconditionally stable.
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Follow Ups
- RE: So what have I got wrong this time? - 6AS7_6SN7 10:40:43 05/24/16 (6)
- RE: So what have I got wrong this time? - hennfarm 21:49:27 05/24/16 (1)
- RE: So what have I got wrong this time? - vinnie2 04:01:39 05/25/16 (0)
- RE: So what have I got wrong this time? - vinnie2 12:06:00 05/24/16 (3)
- Invest in a scope! - gusser 15:48:46 05/24/16 (2)
- RE: Invest in a scope! - vinnie2 16:32:02 05/24/16 (1)
- Good! - gusser 09:22:44 05/25/16 (0)