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Classic Currents

Tested Matched Pair 1960s Western Electric 404A Tubes 404 A Codes 6226 & 6326

Tested Matched Pair 1960s Western Electric 404A Tubes 404 A Codes 6226 & 6326

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$34.95 USD
$34.95 USD
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Tested Matched Pair of 1960s Western Electric 404A Tubes.
Date Codes 6226 and 6326.

Date code 6226 places production to April - June of 1962
Date code 6326 places production to April - June of 1963

Tubes are closely matched for Gm testing (see below) and internal structure - they are identical.
Black plates with top square angled D getters.

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

Gm Test = 7250 and 7125 micromhos
Minimum pass/good = 4600

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