[R-390] "Sync Xtal Osc"

[Bob Weiss]

Yes. It is used to adjust which crystal is switched into the circuit at
which bandswitch position. To use it, you loosen the clamp on the 2nd
oscillator switch shaft, and rotate the shaft through the hole on the rear
panel using a long screwdriver until the switch is in the proper position.

On Sun, May 12, 2019 at 8:36 AM <jgedde at optonline.net> wrote:

> To make sure I understand... So it's a mechanical adjustment for the
> crystal
> switching?
>
> Thanks
> John
>
>
> -----Original Message-----
> From: Jacques Fortin <jacques.f at videotron.ca>
> Sent: Saturday, May 11, 2019 9:42 PM
> To: jgedde at optonline.net; 'R390 (E-mail)' <r-390 at mailman.qth.net>
> Subject: RE: [R-390] "Sync Xtal Osc"
>
> Hello John,
>
> For both the R-390 and R-390A, it is to "synchronise" which crystal is used
> in the 2nd Cristal Oscillator with the band in use.
> This is a part of the adjustment procedure for both models.
>
> 73, Jacques, VE2JFE
>
> There's a hole in my rear panel marked" SYNC XTAL OSC."  Visible through
> the
> hole is a flat screwdriver plug in the xtal oscillator deck.  What is this
> for?  I just noticed it today.
>
> John
>
>
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