[NJARC] Voltage-Resistance Chart - AK55C

[Al Klase]

Gang,

A feature found in the documentation for many later radios, especially 
commercial and military gear, is a chart indicating operating voltages 
and non-operating resistances found at each tube pin of the set. This is 
a handy troubleshooting aid as you can easily (1) signal trace to the 
bad tube, (2) make voltage measurements to determine which circuit 
(plate, screen, grid, etc.) is unhappy, and then (3) make resistance 
measurements to find the bad component.

In a totally inoperative radio, especially one with a short in the power 
supply, it's may not be unreasonably to dispense with signal tracing, 
and measure all the resistances to localize trouble. This is 
particularly true when there aren't a large number of tube involved.

If you're fortunate enough to have tube-socket adapters, you can easily 
determine tube pin numbers, and make measurements from the top of the 
chassis.

I just spent some time generating a V-R chart from my working Atwater 
Kent AK-55C. This was part of the aftermath of last Saturday's Repair 
Clinic. Let me know if you'd like a copy.

Al

-- 
Al Klase – N3FRQ
Jersey City, NJ
http://www.skywaves.ar88.net/