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Classic Currents

Tested Matched Pair GE 12SN7GTA Tubes Gray Plates Date Codes 58-43 12SN7 GTA

Tested Matched Pair GE 12SN7GTA Tubes Gray Plates Date Codes 58-43 12SN7 GTA

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$64.95 USD
$64.95 USD
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Tested Matched Pair of GE 12SN7GTA Tubes with Original Boxes.
Date Codes 58-43.

Tubes are matched for Gm testing within 5% (see below) and internal structure - they are identical.

The boxes have heavy to moderate scuffing and wear overall with some fading and light writing on the front tabs - see photos.

Gray 4 hole plates with side horseshoe getters.

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

Gm Test = 3000-3000 and 2875-2875 micromhos
Minimum pass/good = 1650-1650

Further tested under real operating conditions on an amplifier and presenting no microphonics.

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