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(1) Tested Hallicrafters 6AB4 Tube Date Code 61-31 Square Halo Getter Triode

(1) Tested Hallicrafters 6AB4 Tube Date Code 61-31 Square Halo Getter Triode

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$8.95 USD
$8.95 USD
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(1) Tested Hallicrafters 6AB4 Tube.
Date Code 61-31.
The 274 EIA code indicates that this tube was made by RCA for Hallicrafters.

The wording is faded but still legible.

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 = 2500

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