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(1) Tested GM 6SK7 Tube Code E1▲ Vintage GM Genuine Parts General Motors Tube

(1) Tested GM 6SK7 Tube Code E1▲ Vintage GM Genuine Parts General Motors Tube

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(1) Tested GM Genuine Parts 6SK7 Tube.
Date Code E1▲.

This tube tests as NOS.

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

Gm Test = 3000 micromhos
Minimum pass/good = 1260
NOS rating = 1890

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