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(1) Tested RCA 6SF5 Tube Date Code 64-17 6SF5 High Mu Triode Vacuum Tube

(1) Tested RCA 6SF5 Tube Date Code 64-17 6SF5 High Mu Triode Vacuum Tube

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(1) Tested RCA 6SF5 Tube.
Date Code 64-17.

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 = 1750 micromhos
Minimum pass/good = 940
NOS rating = 1410

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