| I have a Century 21 that works pretty well....rebuilt the
pto and it works OK now.
It has a problem with the narrow position of the audio
filter 500 Hz. position.  It has noise when switched
there and no signal comes through...Other positions OK.
It appears I would have to do considerable disassembly 
to get to the components...anyone have any experience
with malfunction and noise in this filter?  It isn't 
too complicated as a circuit, but thought someone here
might suggestion some checks that can be made without 
disassembly...I think most components can be reached 
for measurements without disassembly.
Thanks, 73,
John Farler, K4AVX
jfarler@peoplepc.com
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