Quote:
Originally Posted by Boater Sam
I have just dug out another AC41 from the shrubbery to compare the [two] chassis and this one is oscillating too! The symptoms are very similar though not so severe.
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Quote:
Originally Posted by Boater Sam
Just [to] clear a good point made by Lawrence earlier, with my poor aerial . . . (etc).
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The fact that you have
two sets that are unstable has caused me to ponder: is there a common link there? (Apart from you, that is!
). You say "my poor aerial". So presumably you are using what is colloquially termed a 'long wire'. Could it be that the lead-in from that aerial is draped across the bench and possibly the set, thus acting as a coupling medium for the various stages in the set? I do realise that that is a
really long shot, but up to now you seemed to have explored the underneath of every stone . . . . .
I detect that you and I am similar in one respect: a passionate hatred of bizarre, unsolved mysteries in mis-behaving R.F. circuits.
Al.