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Classic Currents

Tested Matched Pair RCA 6SN7GT Tubes Black Plates Copper Grid Posts Codes 513

Tested Matched Pair RCA 6SN7GT Tubes Black Plates Copper Grid Posts Codes 513

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$68.95 USD
$68.95 USD
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Tested Matched Pair of RCA 6SN7GT Tubes.
Date Codes 513.

Tubes are closely matched for Gm testing (see below), date codes and internal structure - they are identical.
Black staggered plates with copper grid posts and bottom square D getters.

The tube number is worn off of one of them.

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

Gm Test = 2375-2500 and 2500-2375 micromhos
Minimum pass/good = 1650-1650

Further tested under real operating conditions on a Class A amplifier and exhibiting no microphonics.

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