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(1) Tested Sonatron X201A Tube Globe 01A Tube Engraved Base Triode Tube (b)

(1) Tested Sonatron X201A Tube Globe 01A Tube Engraved Base Triode Tube (b)

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$68.95 USD
$68.95 USD
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(1) Tested Sonatron X201A (01A) Globe/Balloon Tube.
Globe/balloon envelope with an engraved base.
The original label is still intact with little to no wear.

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

Gm Test = 650 micromhos
Minimum pass/good = 460

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