On Tue, 01 May 2007 16:42:59 GMT, "Dave"
wrote:

I seem to have transformed a infrequent mild annoyance into a show-stopper.

Had the exact same problem once in a mixing panel (unbalanced audio,
one channel fading away and coming back, incidental cracle and pop
sounds - cleaning did not help)

turned out to be a leaky electrolyte. Found it by measuring biasses on
every transistor in sight. Tapping the cap did not reveal anything
though.

--
- René