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Classic Currents

(1) Tested Balanced Crosley 4BQ7A Tube Silver Tipped Code 639 4BQ7 A Twin Triode

(1) Tested Balanced Crosley 4BQ7A Tube Silver Tipped Code 639 4BQ7 A Twin Triode

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$9.95 USD
$9.95 USD
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(1) Tested Balanced Crosley 4BQ7A Tube.
Date Code 639. Silver tipped.
The 312 EIA code indicates that this tube was made by Sylvania for Crosley.

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

Gm Test = 7375-7375 micromhos
Minimum pass/good = 4000-4000

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