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(1) Tested Sylvania 6SL7GT Tube Gray Plates Date Code AD Twin Triode Vacuum Tube

(1) Tested Sylvania 6SL7GT Tube Gray Plates Date Code AD Twin Triode Vacuum Tube

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(1) Tested Sylvania 6SL7GT Tube.
Date Code AD.

Gray rounded plates.

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:

Test Result = 1500-1625 micromhos
Minimum pass/good = 1000-1000
NOS target Value = 1500-1500

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