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(1) Tested RCA 6CB6 Tube Date Code 504 Sharp Cut Off Pentode RCA 6CB6 Tube

(1) Tested RCA 6CB6 Tube Date Code 504 Sharp Cut Off Pentode RCA 6CB6 Tube

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(1) Tested RCA 6CB6 Tube.
Date Code 504.

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

Gm Test = 4250 micromhos
Minimum pass/good = 3500

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