[R-390] My 'new' R390

[Adam Morehouse]

Tomorrow I'll get it down on my bench and start work on it. Hopefully I can
clean up the switch and get it working again.

Does the line filter go bad on the R390s? I had to change one on my R390A.
It would be more of a task on this with the plug for the cord.

Thanks guys,

Adam

On Fri, Aug 15, 2025, 17:31 David Wise <d44617665 at hotmail.com> wrote:

> I preemptively fitted my machine with an inrush current limiter, and a
> snubber across the switch contacts.
>
> Dave Wise
>
> > On Aug 14, 2025, at 6:37 PM, Norman Ryan via R-390 <
> r-390 at mailman.qth.net> wrote:
> >
> >  Hi, Adam,
> > If you can remove the power switch, you can revive it by taking it apart
> and retrieving the two contacts.  You may note the contacts are pitted and
> tend to hitch onto one another, causing them to hang.  Simply smooth them
> with a fine toothed file and all will be well with the switch after
> assembly and reinstallation.
> > Norman
> > Adam wrote:
> >> 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 K2AAMl list: http://www.qsl.net/donate.html
> >
> > ______________________________________________________________
> > R-390 mailing list
> > Home: http://mailman.qth.net/mailman/listinfo/r-390
> > Help: http://mailman.qth.net/mmfaq.htm
> > Post: mailto:R-390 at mailman.qth.net
> >
> > This list hosted by: http://www.qsl.net
> > Please help support this email list: http://www.qsl.net/donate.html
>