SYLVANIA 6J7G – MATCHED AUDIO TUBE PAIR (2 PCS)
Made in USA
Black Round Plate
Leaf Getter
Black Base
Top Grid Cap Connection
Sharp-Cutoff Audio Pentode 6J7G
New in Original Box
Amplitrex AT1000 Tested
Up for sale is a matched pair (2 pcs) of vintage NOS Sylvania 6J7G sharp-cutoff audio pentode vacuum tubes, complete with their original factory boxes. Made in USA by Sylvania, these premium American valves feature classic black round plates, leaf getters, sturdy black octal bases, top grid cap connections, and traditional ST shoulder glass envelopes. Highly prized by audiophiles and tone enthusiasts for their sweet vintage warmth, low noise performance, exceptional microphonic rejection, and pristine signal amplification. An ideal matched pair upgrade or replacement for classic audio preamplifiers, microphone preamps, and vintage tube equipment using 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. 1590001 | Single Pentode | 2.0 mA | 2.1 mA | 105% | 1200 | 1200 | 100% |
| SR.NO. 1590002 | Single Pentode | 2.0 mA | 1.7 mA | 85% | 1200 | 1000 | 83% |
Technical Note: Custom duties and taxes are the responsibility of the buyer in their country.
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