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(1) Tested Tung Sol 1F7G Tube Date Code 9 Double Diode Pentode Vacuum Tube

(1) Tested Tung Sol 1F7G Tube Date Code 9 Double Diode Pentode Vacuum Tube

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(1) Tested Tung Sol 1F7G Tube.
Date Code 9.

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

Gm Test = 625 micromhos
Minimum pass/good = 410
Each diode section tests at 1550 and 1500 where 500 is minimum pass/good.

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