1939 Silvertone FARM RADIO! AHHH!!

[jr_tech]

THANK YOU!
I dug around in a couple of coffee cans that I labeled "1 volt tubes" and actually found a 1D5Gp.

jr

[dieseljeep]

Originally Posted by jr_tech

THANK YOU!
I dug around in a couple of coffee cans that I labeled "1 volt tubes" and actually found a 1D5Gp.

jr

Originally the first number in the tube type was supposed to be the filament or heater voltage, but that didn't seem to hold true. A classic example was the locktal tubes. The 7 designation was 6.3 volts and the 14 was 12.6 volts. All the other locktal tubes, seemed to be correct.
It must've been a Sylvania thing.