Here's the latest -
last weekend I pulled the chassis, but had nto time to work on it, I had it flat on the table, and tonight I turned it up to look at the bottom, and the missing core dropped out. It was somewhere all the way at the back of the chassis - I don't knoe how it could have arrived there.
Now the bad news - in trying to re-insert the core, I cracked it. The brass screw does have a slot internal to the core, so it could be driven from the rear. Apparently the threads were galled (maybe deliberately so that no one should screw it all the way in and lose it like happened here). Anyway, I'm guessing I got the screwdriver cocked and applied pressure to the ferrite, cracking it.
The pictures show
(048s) the original coil in place
(052s) Top - possible replacement? (would have to remove a lot of windings, I think)
middle - core from "possible replacement"
bottom - broken core from original
dagnab it!
