Re: Aga Baltic AH37. Need help identifying old capacitor from 1930s radio
Chris is perfectly correct.
The insulation in a 1932 output transformer will be made of oiled paper and by now it will be very dried out. Driving the radio hard from a guitar to get distortion is very likely to cause the transformer insulation to breakdown. If you are using a pre-amp to create the distortion then driving the radio at sensible levels it should be OK.
I doubt if there are any 1950 guitar amplifiers that have not had the output transformer replaced or rebuilt.
PS: Have you checked the resistance of the transformer windings?
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