[R-390] My 'new' R390

Barry n4buq at knology.net
Thu Aug 14 21:27:43 EDT 2025


You might be able to revive that power switch.  Sometimes they get stuck in the down position but pressing them down just a bit with a small tool and letting it pop back up can sometimes free them.  Letting a little bit of cleaner like IPA, etc., work down in it can help.

Barry - N4BUQ



> I brought up my recently acquired R-390 slowly on a variac. No smoke, and
> it picks up stations - not quite as good as my R390A, but thats to be
> expected since its been asleep for 20 years.
> 
> Power switch doesn't turn off, I'll need to find one. Local Audio is
> extremely quiet unless the BFO is turned on, then it's too loud (turned all
> the way down and it's still booming). Line meter also doesn't function
> unless the BFO is turned on. With my Kiwa MAP hooked to IF out, it sounds
> decent.
> 
> Where should I start :D
> 
> Adam K2AAM
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