"Excuse me sir, but this radio squeals..."
"Not it doesn't! That is it's - built-in alarm..."
What are the values on those crystals?
Are they crystals or detonators...
Di-lithium or Folgers?
The PA switch would more than likely be a "stepper" a logic function that toggles thru all those Xtals - are they rotary relay switches? IF so - that means you can have up to 8 poles or so on each, X2 - 8 x 8 = 64 steps or use 1 pole to step the other - 8 x 7 = 56 as - and if any of the Xtals were around 10MHz this setup would work. That's why I'm wondering if what I see in your photo is what others tried to do using individual Xtals like 10.70 and 11.325 - a means to "escape" quickly to another band. IT's undoing those and putting them back to stock - they're like time bombs...you never know if you're going to get it to work right again. Similar to BCD rotary - but that is parallel binaries, this is swapping in Xtals that would make the PLL see a different timebase clock and produce an output based upon the timebase Xtal swapped in, not just correct BINARY from the BCD switch - an Achilles' heel to the PLL ROM - if you can't make it jump to it, change the clock...it only needs to match/BFO to the VCO...just can't see the frequencies...
Now I know how they can do it, a personalized radio that you can make look normal - but at night, when no one is around, they open up the closet and find that magical screwdriver - and with a few turns of this screw, located on this panel ...
Ranks right up there with the Cobra 142 and 2000's that used the '2290 as a booster - watch an S-9 go to a S-20 cherry patch just for turning up the Dynamike.
I hope you can unlock those secrets - because that work looks to be done in an era of Cold War Blues. Where Oddballs we're not just a metaphor for "Crazy Dudes".
You've got a classic on your hands...Lucky Guy!
:+> Andy <+: