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(1) Tested 1966 6BC4 Tube with Box Date Code 66-17 Medium Mu Triode Vacuum Tube

(1) Tested 1966 6BC4 Tube with Box Date Code 66-17 Medium Mu Triode Vacuum Tube

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(1) Tested 1966 RCA 6BC4 Tube with Original Box.
Date Code 66-17.

The box has a packaged date of 4-66 (April, 1966)
The box has a slight dent/crease in one panel.

This tube tests above NOS.

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

Gm Test = 11,500 micromhos
Minimum pass/good = 6100
NOS rating = 9150

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