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(1) Tested Strong National Union Type 01A Tube Gold Glass Shouldered ST Code Y

(1) Tested Strong National Union Type 01A Tube Gold Glass Shouldered ST Code Y

Very Rare Gold Glass Envelope. Tested and Guaranteed.

$124.95 USD
$124.95 USD
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(1) Tested National Union 01A Tube.
Very Rare Gold Glass envelope with brass pins.

Engraved base is tight and secure with no looseness.
The tube number is faded on the glass but is still legible under strong light.

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 = 875 micromhos
Minimum pass/good = 460
NOS Rating = 690

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