[R-390] R-390 alignment attempt #1, need advice - Crystal Deck

[Frank Hughes]

Hi,
I went through the first pass of alignment on the R-390, found some things
that need attention, not sure how to proceed.

Section 77 , Chapter 3 "Repairs and Adjustments" in TM 11-5820-357-35.
"Alignment of Second Crystal Oscillator"

Some of the crystals won't adjust w/ the trimmer.

Initially did not think this was important, as they are bands I don't use.

But by the time I got to the RF deck alignment, it became clear that I will
have to fix them.

All the manual says is "If no indication is obtained, check the
"Crystal-oscillator bandswitch".

If the "Crystal-oscillator bandswitch" is the big wafer switch inside the
crystal deck, I might be able to get some Deoxit on the wipers/traces, but
WOW, that thing is buried.

But could the problem also be a dirty trimmer and/or bad crystal?

I have a spare crystal deck to swap parts out of, if needed.

Thanks & 73
Frank
KJ4OLL