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Classic Currents

(1) Tested Strong 1957 Tung Sol JTL 5687 Tube Black Plates Copper Rods Code 748

(1) Tested Strong 1957 Tung Sol JTL 5687 Tube Black Plates Copper Rods Code 748

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$58.95 USD
$58.95 USD
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(1) Tested Very Strong Tung-Sol JTL-5687 Tube.
Date Code 748 (48th week of 1957).

Black plates with copper rods and a horseshoe halo getter.

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

Gm Test = 9875-10,000 micromhos
Minimum pass/good = 4800-4800

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