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In Reply to: Help with CCS ? posted by MichaelM on June 6, 2012 at 05:19:57:
So I shuffled the CCS's around, and the problem followed the CCS.
I connected a 1 KHz source, and measured the output voltages, and the gain of the tube on the "dodgy" CCS is about three times less than the other tubes, almost as is the CCS isn't presenting an "infinite" load.
I hooked up my headphones, and the channel in question was quite a bit noisier than the other channel, with lots of crackles and dropouts.
I'm going to try and find a 100pF capacitor, but does that sound like oscillation ? The lower gain on the tube is a bit of a worry ...
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Follow Ups
- RE: Help with CCS ? - MichaelM 23:21:36 06/09/12 (1)
- RE: Help with CCS ? - KevinC 03:07:22 06/10/12 (0)