03-29-2017, 11:16 AM
Hi Jim,
Don't have a 610 in front of me but bottom line is that grid #2 in the 6A7 must have some HV on it. This is what the 32K resistor supplies. The mica cap is to couple signal from that grid (#2 which is acting as the plate for the oscillator) over to the primary of the oscillator coil thru the bandswitch.
Without HV applied to grid 2 the oscillator section will not operate.
Hope this helps.
Don't have a 610 in front of me but bottom line is that grid #2 in the 6A7 must have some HV on it. This is what the 32K resistor supplies. The mica cap is to couple signal from that grid (#2 which is acting as the plate for the oscillator) over to the primary of the oscillator coil thru the bandswitch.
Without HV applied to grid 2 the oscillator section will not operate.
Hope this helps.
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 "[-]")
