06-22-2020, 09:27 AM
OK, so much for SW. I'm not sure if you have an alignment procedure, my schematic doesn't have one. You have 3 IF transformers, 24, 29 and 35. They are the square metal cans on the chassis. Each transformer can be tuned by adjusting the variable capacitor at the top of the can. Can 24 also has a tunable core but you probably don't have the special tool needed.
Tune in a distant station, one that has a low noise level. Turn up the volume. Start with 35 by adjusting slightly the capacitor with a small screwdriver for the loudest volume. You should find that tightening and loosening the screw slightly will produce a peak in the volume. Next, do the same for can 29, then 24. Don't do this if you don't understand what to expect. You could detune the transformers.
The IF frequency is 455khz and this is the resonant frequency of each transformer. Normally there is 2 transformers in a radio. With 3 in yours you should have better selectivity.
Let us know how it goes.
Tune in a distant station, one that has a low noise level. Turn up the volume. Start with 35 by adjusting slightly the capacitor with a small screwdriver for the loudest volume. You should find that tightening and loosening the screw slightly will produce a peak in the volume. Next, do the same for can 29, then 24. Don't do this if you don't understand what to expect. You could detune the transformers.
The IF frequency is 455khz and this is the resonant frequency of each transformer. Normally there is 2 transformers in a radio. With 3 in yours you should have better selectivity.
Let us know how it goes.
