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Old October 15th 04, 04:49 PM
Frank Dresser
 
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"bpnjensen" wrote in message
om...
[snip]

(2) The degree of AM BCB intermod, especially below 4 MHz, is
dramatically increased, almost to the point where nothing legitimately
below 4 MHz can get through. All preamps off, still get the gunk
where it wasn't before. Booo.


You might want to look it over for a wire pulled loose, a cracked circuit
board trace or a poor solder connection. It's possible you did some
inadvertent damage as you disassembled it. Happens to me from time to time.
Even if I didn't spot anything, I would probably shotgun a bunch of solder
joints with an iron.



Or, it could be that I did not let
the stuff evaporate enough (so it gets another 24 hours as we speak).


Evaporation shouldn't be a factor. The solvent is flammable and it's wise
to give it time to evaporate if the stuff got into a power switch. But just
having the stuff sloshing around inside a pot isn't going to change it's
performance. The solvent isn't conductive. The solvent does have some
dielectric constant, and can effect the way a tuning capacitor tunes until
it evaporates.



Or, the DeOxit had some unintended effect on the unit, either inside
or outside the pots. I think this is unlikely.

As I investigate more, I will try to fill in the gaps. I also have a
PAR BCB intermod reduction filter I will try ahead of and behind the
unit. Meanwhile, I will appreciate any other ideas folks might have.


Look for damage.


73, and don't let the political junk get you down,
Bruce Jensen


Frank Dresser


 
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