[R-390] EAC R-390 factory modification that incorporates USB/CW/LSB

[Tom M.]

I think there is a schematic of that in Paolo's R-390A book.

Tom
--- Tim Shoppa <shoppa_r390a at trailing-edge.com> wrote:

> "TChirhart" <sparks at codepoets.com> wrote:
> > Does anyone know any anyR-390's that were modified under contract that
> > removed the BFO on/off switch and replaced the BFO pitch control with one
> > control?  I saw an R-390A, EAC contract that had this modification. A
> > vertical 1 inch by 3 inch matching grey panel plate was installed over the
> > two switches and only one control remained. It had a LSB CW USB position
> > where the BFO pitch control previously was located. The owner indicated
> that
> > this was a rare factory modification. Sorry no photos were taken. So was
> > there ever a modification of this nature that was not an aftermarket add
> on?
> >
> > 73
> >
> > Tom K4NCG
> 
> If this has a 6U8 added as well behind the front panel, isn't this
> the "Mexican Military" version by Columbia Electronics?
> 
> Tim.
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