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Tested Matched Pair Wards Super Airline 12A Tubes Engraved Bases Codes R and I

Tested Matched Pair Wards Super Airline 12A Tubes Engraved Bases Codes R and I

Tested and Guaranteed

$114.95 USD
$114.95 USD
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Tested Matched Pair Wards Super Airline 12A Tubes.
Engraved Bases. Date Codes R and I.
Tubes are tightly matched for Gm testing (see below) and internal structure - they are identical.
Wide silver plates with bottom square foil getters.

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

Gm Test = 1775 and 1750 micromhos
Minimum pass/good = 1040

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