SYLVANIA JAN 6SN7GT
BLACK PLATE – 1 PC
GRADE: PLATINUM SERIES | LABORATORY VERIFIED NOS MILITARY SPEC
Joint Army-Navy (JAN 6SN7GT)
Black Plates
Vintage Military Box
Amplitrex AT1000 Tested
Up for sale is a single vintage Sylvania JAN 6SN7GT dual triode driver valve, brand new in its original US Government vintage military box (Order No. 535-MPD-43 / Zenith Radio Corp.) Made in the USA, this highly sought-after audiophile preamplifier/driver tube features deep black plates and military-grade construction for exceptional tone and clarity.
As shownin , this tube has been bench-tested on our laboratory-grade Amplitrex AT1000 digital tube testing system. The measured plate current (Ip) and transconductance (Gm) results are calculated against standard factory specifications (9.0 mA / 2600 uMhos) and detailed in the table below.
| Serial No. | Tube Section | Plate Current (Ip) | Transconductance (Gm) | ||||
|---|---|---|---|---|---|---|---|
| Factory Spec | Result | % Ip | Factory Spec | Result | % Gm | ||
| SR: 1384001 | Triode 1 | 9.0 mA | 13.6 mA | 151% | 2600 uMhos | 2140 uMhos | 82% |
| Triode 2 | 9.0 mA | 13.8 mA | 153% | 2600 uMhos | 3010 uMhos | 116% | |
Technical Note: Custom duties and taxes are the responsibility of the buyer in their country.
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