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(1) Tested CBS 7R7 Tube with Box Date Code GV Twin Diode Pentode Loctal Tube

(1) Tested CBS 7R7 Tube with Box Date Code GV Twin Diode Pentode Loctal Tube

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(1) Tested CBS 7R7 Tube with Original Box.
Date Code GV.

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

Test Result = 2600 micromhos
Minimum pass/good = 1900
Each diode section tests at 1100-1150 where 800-800 is minimum pass/good.

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