[R-390] R-390 (non-A) Sudden and New Issue

[Alex Hopper]

Hi Jordan,

This restoration was performed by someone other than me.  Which filter are
you referring to on the schematic?

Thank you
-Alex

On Thu, Feb 26, 2026 at 3:56 PM Jordan Arndt <Outposter30 at shaw.ca> wrote:

> Out of curiosity, was the AC input filter rebuilt or replaced when it was
> restored..?
>
> 73...Jordan VE6ZT
>
>
>
> ----- Original Message -----
> From: "Alex Hopper" <ahopper0216 at gmail.com>
> To: "R-390 Mailing List" <r-390 at mailman.qth.net>
> Sent: Thursday, February 26, 2026 11:46 AM
> Subject: [R-390] R-390 (non-A) Sudden and New Issue
>
>
> > Hi Folks,
> >
> > I have an R-390/URR (non-A model) that was restored by someone last year
> -
> > the individual who restored this set is quite competent and did good
> work.
> >
> > Over the last few days I have noticed 'popping' and 'cracking' coming
> from
> > the set.  Sounds like what you would hear if there was a lightning strike
> > nearby, or if there was an internal component that aws arcing.
> >
> > As a result the radio does not receive on any bands at the moment.  I
> took
> > it out of its cabinet and checked/replugged all the connectors between
> > modules.  I fired it up and it worked perfectly normal.  I turned it off,
> > put it back in the cabinet and...same issue!  I removed it again and the
> > issue persists.
> >
> > I don't even know where to start with this, and I am upset that my
> beloved
> > R-390 seems to be dead in the water.
> >
> > any suggestions or thoughts?
> >
> > Thanks,
> > -Alex
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