[R-390] Z503 Replacement

[bavarianradio at comcast.net]

I have been kicking this question around as well. In several discussions with other techy types, we are surmizing that the varnish/laquor or whatever it is that it's potted in, becomes quite brittle and is actually breaking the wire where it passes through the material.This could be very likely enhanced by temperature change or temperature extremes like un heated/cooled storage.It would be interesting to carefully disassemble one that is open and try to find the break. FWIW mine is still working OK  after the arc repair I performed on it almost 2 months ago. I don't expect it to last forever though. Ross W1EKG
----- "Stephen M. Murphy" <murphys at comcast.net> wrote:

That's what I was wondering, whether it is a manufacturing defect or an
upstream failure causing the problem, since these things typically don't
(can't) just fail on their own.  I'm also wondering if it's an "across
the board" problem, or just affects those radios that were subjected to
outdoor storage.
73-
Steve


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