[R-390] 3MC issue updated

[Curt Nixon]

Steve Quinn wrote:
> I posted this a while back, when I shift to 3MC I hear signals then they fade 
> but not all the way out.
>
> OR I hear signals for about 30 secs then the band goes dead, dead as a door 
> nail.  I have cleaned the xtal and it worked when I put it in my 75S-1
>
> Question:  are the R390A xtals different from the other xtals used in other 
> Collins?
>
> I have heard from all to clean this or that, well this unit was taken apart and 
> everything was refurbished but the dang 3MC and the related 20MC don't want to 
> play nice
>
> Thanks
>
> Steve Quinn
>
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PS..if the signals don't change pitch as they fade, this REALLY narrows 
down the potential area.  Truth table...No freq change + only on 3Mc=?

Curt