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(1) Tested National Union 6SF5GT Tube with Box Code KU 6SF5 Triode Vacuum Tube

(1) Tested National Union 6SF5GT Tube with Box Code KU 6SF5 Triode Vacuum Tube

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$13.95 USD
$13.95 USD
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(1) Tested National Union 6SF5GT Tube with Original Box.
Date Code KU.
The date code on the tube is the same code on the front tab of the box, so you know it's the same one that it left the factory with.
The box shows overall wear and scuffing.

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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