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(1) Tested Sylvania 6AT8A Tube and Box Code de JAL Triode Pentode Converter Tube

(1) Tested Sylvania 6AT8A Tube and Box Code de JAL Triode Pentode Converter Tube

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(1) Tested Sylvania 6AT8A Tube with Original Box.
Date Code de JAL.

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 = 4625-5750 micromhos
Minimum pass/good = 2900-2840
NOS rating = 4350-4260

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