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Classic Currents

Tested Matched Pair Hickok 6SN7GTB Tubes Black Plates RCA EIA Codes 6SN7 GT

Tested Matched Pair Hickok 6SN7GTB Tubes Black Plates RCA EIA Codes 6SN7 GT

Very Rare Hickok Branded Tubes.

$148.95 USD
$148.95 USD
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A rare and not often seen tested matched pair of Hickok branded 6SN7GTB Tubes.
The 274 EIA codes indicate that these tubes were made by RCA for Hickok.

Tubes are closely matched for Gm testing (see below) and internal structure - they are identical.
Thin bases with black staggered plates and bottom square D getters.

One tube base has faded wording.
The tube numbers are worn off of the glass on each.

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

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

Also performance tested in-circuit through a Class A amplifier with no microphonics detected.

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