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Philco #91B Shadow Tuning Question
#3

Most of the circuits w/sm I've seen have a resistor in parallel w/the coil. This stops the disabling of the set if the sm fails. As I recall it's 2 or 3K. It also helps if there is a short in the plate or screen circuit to divide the current across the coil.

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


Messages In This Thread
RE: Philco #91B Shadow Tuning Question - by Radioroslyn - 02-12-2024, 09:36 AM



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