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Classic Currents

(1) Tested DeForest Audion 401A Tube Type 01A Tube Globe Tube Engraved Base (b)

(1) Tested DeForest Audion 401A Tube Type 01A Tube Globe Tube Engraved Base (b)

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$58.95 USD
$58.95 USD
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(1) Tested Very Strong Deforest Audion 401A Tube (01A Tube).
Globe/balloon envelope with an engraved (hot stamped) base.
This tube tests above NOS specs.

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

Test Result = 1000 micromhos
Minimum pass/good = 460
NOS Target Value = 690

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