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Classic Currents

(1) Tested GE 7581 Tube Brown Base Date Code 61-17 GE Type 7581 Tetrode Tube

(1) Tested GE 7581 Tube Brown Base Date Code 61-17 GE Type 7581 Tetrode Tube

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(1) Tested GE 7581Tube.
Date Code 61-17.

One small fleck on the tip of the key but this doesn't affect installation or performance in anyway - see photo 7.

Tested on a calibrated Hickok TV-10 military tube tester and exhibiting no shorts or leaks with the following results:

Test Result = 5250 micromhos
Minimum pass/good = 3800

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