[R-390] RF subchassis separation

[Mark Richards]

Removal of the entire RF and Crystal Oscillator section was a lot easier 
than it first appears.  Simply a few green-headed screws, remove some 
cabling, and it comes out as an entire unit.  It looked intimidating, 
which caused me to believe that it was... like a schoolyard bully.

Now that the RF deck is removed I was able to clean up the bandswitch, 
replace a few capacitors, and poke around in the crystal oscillator 
section.. as mine doesn't work properly.  No issues found in that area 
(with components that are testable in circuit); no signs of overheating 
or stress.  So it's either tube/s or crystal.

Question A: As I keep hearing crystal replacement as the answer to this 
problem, can someone here lead me to a source?

I should probably replace the pair.  Test revealed that < 8MHz I have no 
radio.. so likely the other crystal gave up, too.

Decided not to disassemble any further, as in repairing the loose shaft 
that started this whole mess.   It works mechanically.  Why fix it.. 
unless I want perfect stock appearance perfection, which I am less 
inclined towards after all this work.

Went about removing each of the slugs to be certain I had not mixed 
these up and managed to snap two of them.  Easy to do as they are old 
and seem quite brittle.

Question B: Is the best fix a dab of epoxy?  Looks as if it cannot be 
soldered together...

/K1MGY