10-12-2017, 04:13 AM
Hi Bernie,
Perhaps this will clear it up for you. Looking from the back side end terminal on the left goes to #24, the center (wiper) to #28, and the other end to chassis gnd.
As for the tone/off/on sw two of the connections are to the ac circuit (one to the power transformer and other to the ac cord). The other connections connect to # 38, 40, and chassis gnd.
In regard to #30 it may have been a costs cutting discontinuation, it wouldn't hurt to add in back in. It decouples the grid bias voltage to the 6K5. Without it the 6K5 maybe prone to oscillate.
GL
Perhaps this will clear it up for you. Looking from the back side end terminal on the left goes to #24, the center (wiper) to #28, and the other end to chassis gnd.
As for the tone/off/on sw two of the connections are to the ac circuit (one to the power transformer and other to the ac cord). The other connections connect to # 38, 40, and chassis gnd.
In regard to #30 it may have been a costs cutting discontinuation, it wouldn't hurt to add in back in. It decouples the grid bias voltage to the 6K5. Without it the 6K5 maybe prone to oscillate.
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
![[-]](https://philcoradio.com/phorum/images/bootbb/collapse.png "[-]")
