[TenTec] Need Century 21 help...

[John Farler]

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 at peoplepc.com