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(1) Tested GM 7A7 Tube Code 739▲ Vintage General Motors 7A7 Tube Loctal Tube

(1) Tested GM 7A7 Tube Code 739▲ Vintage General Motors 7A7 Tube Loctal Tube

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$9.95 USD
$9.95 USD
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(1) Tested GM (General Motors) 7A7 Tube.
Date Code 739▲.
The 312 EIA code indicates that this tube was made by Sylvania for GM.

This tube tests as NOS.

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

Gm Test = 1700 micromhos
Minimum pass/good = 1100
NOS rating = 1650

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