[R-390] Intermittent Filter

[David Wise]

> From: Mike Hardie [mailto:hardiem@intergate.ca]
> 
> The 4 Kc filter in my '390A is "intermittent".  It works OK 

I have one of the older IF decks, with hand-picked fixed mica
caps instead of trimmers.  One of these (8kHz in my case) turned out
to be intermittent.  However, it didn't respond very strongly to
heat/cold; only just enough to make me suspicious.  I used brute
force and slapped in another mica.  End of problem.  Later I went
back and hand-picked for maximum response.  The old cap went in the
"Bad R-390A parts" baggie.  Not much in there, it was a good
radio to start with.

73,
Dave Wise