GEC 6J7G – MATCHED AUDIO TUBE PAIR (2 PCS)
Made in England
Classic Black Base
Leaf Getter
Top Grid Cap Connection
Sharp-Cutoff Audio Pentode 6J7G
New in White Box
Amplitrex AT1000 Tested
Up for sale is a matched pair (2 pcs) of rare vintage NOS GEC 6J7G sharp-cutoff audio pentode vacuum tubes, supplied in individual white boxes. Manufactured in England by the renowned General Electric Co. (G.E.C.), these classic British valves feature leaf getters, sturdy black octal bases, top grid cap connectors, internal mesh shield structures, and traditional ST shoulder glass envelopes. Celebrated by audiophiles and tone connoisseurs for their lush British midrange warmth, exceptional microphonic rejection, ultra-quiet noise floor, and pristine signal amplification. An elite-tier matched pair upgrade or replacement for vintage audio preamplifiers, microphone preamps, and classic tube gear utilizing 6J7G / 6J7 valves.
Both tubes have been fully tested on a precision Amplitrex AT1000 tube tester. Measured Plate Current (Ip in mA) and Mutual Conductance (uMhos) alongside percentage performance ratings relative to nominal factory reference specs (Reference: 2.0 mA / 1,200 uMhos) are detailed in the table below.
| Serial No. | Tube Section | Plate Current (Ip) | Mutual Conductance (uMhos) | ||||
|---|---|---|---|---|---|---|---|
| Ref Spec | Result | % Ip | Ref Spec | Result | % uMhos | ||
| SR.NO. 1583055 | Single Pentode | 2.0 mA | 3.0 mA | 150% | 1200 | 1300 | 108% |
| SR.NO. 1583060 | Single Pentode | 2.0 mA | 3.1 mA | 155% | 1200 | 1350 | 113% |
Technical Note: Custom duties and taxes are the responsibility of the buyer in their country.
Reviews
There are no reviews yet