11-11-2016, 02:06 PM
Something I've done on hi gain homebrew stuff is rectify the filament voltage. Just a simple half wave and a big cap. If you can do it near the pt it will eliminate ac radiation of the filament wiring. I realize this isn't quite what you're looking for but may give you some insight to what is the real issue. Something else how about the line bypass caps, if you remove those does it change things? Or replacing the 1st audio tube?
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 it!
Terry
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