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I spent hours yesterday playing with this thing (TRK120 radio).
Main problem is the speaker. It is original and works. All coils are working correctly. The cone was indeed rubbing and vibrating badly at low frequencies.
Its paper and hopelessly fragile. I tried shimming the cone in places with
squishy form to damp out the problems, this works OK but clearly will eventually fail due to cracking the paper.
There are places that recone old speakers. Has anybody else had one
of these speakers redone, or a similar one? It is a very garden variety late
30's 12 inch electrodynamic one with an attached push-pull output transformer and hum bucking coil. The frame is in first class shape. And suggestions about where to have it reconed?
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