SYLVANIA 6SN7GT (MULLARD BRANDED) – SINGLE TUBE
GRADE: PLATINUM SERIES | VINTAGE AMERICAN MEDIUM-MU DUAL TRIODE
Mullard Brand Print
6SN7GT Medium-Mu Dual Triode
Black Plates
Bottom Square Getter
Black Base
New in White Box
Amplitrex AT1000 Tested
Up for sale is a single piece (1 PC) of highly desirable vintage Sylvania 6SN7GT dual triode vacuum tube, branded for Mullard and packed in a white box. Manufactured in the USA by Sylvania, this early-production tube features black plates, a bottom square getter, and a smooth black base. Highly coveted in the high-end audio community for its exceptional dynamic extension, airy soundstage, and detailed clarity in Hi-Fi preamplifiers and driver stages.
As shown, the tube has been thoroughly tested on an advanced Amplitrex AT1000 tube testing system in full fixed-bias mode. Plate current (Ip) and mutual conductance (Gm) measurements alongside percentage performance ratings relative to nominal factory specs are detailed in the table below.
| Serial No. | Triode Section | Plate Current (Ip) | Transconductance (Gm) | ||||
|---|---|---|---|---|---|---|---|
| Ref Spec | Result | % Ip | Ref Spec | Result | % Gm | ||
| SR.NO. 3824001A | Triode 1 (T1) | 9.0 mA | 9.2 mA | 102% | 2600 µMhos | 2700 µMhos | 104% |
| Triode 2 (T2) | 9.0 mA | 7.8 mA | 87% | 2600 µMhos | 2800 µMhos | 108% | |
Technical Note: Custom duties and taxes are the responsibility of the buyer in their country.
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