12-24-2020, 08:22 PM
The typical RMA color code for the output transformer's primary would be red would connect to B+ and blue to the plate. If it was a p/p transformer the blue and brown would be for the plates and red for the B+.
Nowdays transformers have different colors with no rhyme or reason.
You got the ant section of the tuning cap ganged with the oscillator trimmer cap.
Lose the 12sa7 and use a 12BA7, much better performance.
Increase the voltage rating of the filters to 250v. With a bridge rectifier you're going to be @ abt 170vdc.
Avc circuit is a little odd as it adds avc voltage to the oscillator circuit? I'd ground the tuning cap and float L1. But to each their own.
Nowdays transformers have different colors with no rhyme or reason.
You got the ant section of the tuning cap ganged with the oscillator trimmer cap.
Lose the 12sa7 and use a 12BA7, much better performance.
Increase the voltage rating of the filters to 250v. With a bridge rectifier you're going to be @ abt 170vdc.
Avc circuit is a little odd as it adds avc voltage to the oscillator circuit? I'd ground the tuning cap and float L1. But to each their own.
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
