04-23-2021, 05:56 PM
I would check the grounds around the tuning cap including the rotor shaft. Be sure the that the brass forks that make the gnd connection are good and clean. Wiring on tuning cap for shorts do to failed rubber.
Check the heater voltage at the 7J7 socket. If it's a little low use a variac to increase the line till you get to 6.3v. Use a counter or digital communication rx to check the osc and track it across the band 455kc about the dial setting. Couple it with a few turn of wire around the 7J7 glass.
Happy Hunting!
de N3GTE
Check the heater voltage at the 7J7 socket. If it's a little low use a variac to increase the line till you get to 6.3v. Use a counter or digital communication rx to check the osc and track it across the band 455kc about the dial setting. Couple it with a few turn of wire around the 7J7 glass.
Happy Hunting!
de N3GTE
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
