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(1) Tested RCA 6CB6 Tube Sharp Cut Off Pentode RCA 6CB6 Vacuum Tube (c)

(1) Tested RCA 6CB6 Tube Sharp Cut Off Pentode RCA 6CB6 Vacuum Tube (c)

Tested and Guaranteed

$6.95 USD
$6.95 USD
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(1) Tested RCA 6CB6 Tube.

The wording is mostly worn off but still recognizable as being RCA branded.

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

Gm Test = 4000 micromhos
Minimum pass/good = 3500

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