[R-390] Finally!!!

Tue, 31 Dec 2002 14:49:00 -0500

Hi,

The yellow Aerovox capacitors have a plastic dielectric in them. They are
more reliable than the paper dielectric black or brown capacitors. I have
pulled a lot of the paper parts out of R-390's and have yet to find one that
is in good shape. I suspect that soak up humidity over time and that's the
end of them.

I have yet to see anybody come to the defense of the paper filled caps. I
would replace them wholesale with plastic dielectric parts.

    Take Care!

        Bob Camp
        KB8TQ

----- Original Message -----
From: "Jim Brannigan" <[email protected]>
To: "blw" <[email protected]>; <[email protected]>
Sent: Tuesday, December 31, 2002 1:06 PM
Subject: Re: [R-390] Finally!!!

> Does "black/brown beauties" also refer to the yellow Aerovox capacitors?
> Jim
>
> > Some people like getting into the upper modules often, so maybe not
> > replacing all of the problem capacitors is okay for them. I like
tinkering
> > with some things too. Still, there is that risk involved if you don't.
> Time
> > and again someone on the list is testing the brown beauties and most of
> them
> > are out of spec. I agree with being safe and replacing them.  Another
> > advantage in replacing the paper electrolytics and black/brown beauties
is
> > that you will be reheating those ancient solder points. If you have the
> MFP
> > coated modules, this is a good time to make sure the grounding points
are
> > scraped clean. This has been a source of problems too. Plus, Scott has a
> > good point where you would be doing the radio a lot of good in terms of
> > performance. Tubes are great, but old caps ain't.
> >
> > Dave in Birmingham also sells recap kits. I bought one a while back and
it
> > is a good deal. It is a good deal on prices, and I saved hours of time
> > looking up parts. He sends them separated and labeled in bags. No fuss,
no
> > muss.
> >
> >
> > Barry Williams
>
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