oldman55
Well-Known Member
Acquired one to compare results for 7355 and 7591 tubes which came with no documents/schematics. I can see it has a 1 and a 100 ohm resistor on its board,Using a nos tube, I get the following readings in circuit with 425v plate voltage:
By way of this device's test leads; 18.5vdc on the VOM. When just testing across this amps 10 ohm cathode resistor on the same tube, I get .405vdc.
Any idea what the "tester's" reading is calculating?
Oldman
By way of this device's test leads; 18.5vdc on the VOM. When just testing across this amps 10 ohm cathode resistor on the same tube, I get .405vdc.
Any idea what the "tester's" reading is calculating?
Oldman
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