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38-39 Vibrator Power Supply Replacement
#7

I would suspect what you are hearing is vibrator  hash this is rf noise generated from the contacts inside the vibrator arcing has they open and close. Some is normal. That is why there are those small chokes and .5mf caps in the p/s they constitute a rf filter against this noise.
If you have replaced the caps in this section of the radio then try connecting an earth ground to the chassis. If this does little or nothing you'll be need to replace the vibrator or open it up and cln/adj the contacts therein.

When my pals were reading comic books
I was down in the basement in my dad's
workshop. Perusing his Sam's Photofoacts
Vol 1-50 admiring the old set and trying to
figure out what all those squiggly meant.
Circa 1966
Now I think I've got!

Terry


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RE: 38-39 Vibrator Power Supply Replacement - by Radioroslyn - 07-20-2017, 05:35 AM



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