09-23-2023, 10:17 AM
There's one other pair of wires on the opt the yellow and green ones. These form a negative back circuit (sometimes called a loop) in the audio to boost the low frequencies at low volume levels. This one is kind of an odd way to do it as most won't have a separate winding on the opt for it. It's more common to see a tap in the opt 2dy or cap & resistor from the plate of the output tube back to the preamp stages. Or to a tap in the volume control.
A lot going on in that little puppy...
GL
A lot going on in that little puppy...
GL
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
