Genuine General Electric (Made in USA)
JAN-6V6GT Beam Power Pentode
Grey Round Plate
Top Ring Getter
Coin Base
Green Print
New in Original Box
Amplitrex AT1000 Tested
Up for sale is a tightly matched quad (4 pieces) of vintage Joint Army-Navy GE JAN-6V6GT beam power pentode vacuum tubes, brand new in their original boxes. Made in the USA by General Electric, these robust military-spec tubes feature iconic grey round plates, coin bases, crisp green printing, and top ring getters. Highly sought after by audiophiles and guitar amplifier enthusiasts for their rich harmonics, smooth mids, tight bottom end, and excellent stability in push-pull configurations.
As shown, all four tubes have been thoroughly tested on our laboratory-grade Amplitrex AT1000 tube tester. Plate current (Ip) and mutual conductance (uMhos) measurements alongside percentage performance ratings relative to nominal specs are detailed in the table below.
| Serial No. |
Plate Current (Ip) |
Transconductance (Gm) |
| Ref Spec |
Result |
% Ip |
Ref Spec |
Result |
% Gm |
| SR.NO. 4728648 |
45.0 mA |
46.6 mA |
104% |
4,100 µMhos |
4,550 µMhos |
111% |
| SR.NO. 4728168 |
45.0 mA |
47.1 mA |
105% |
4,100 µMhos |
4,510 µMhos |
110% |
| SR.NO. 4728647 |
45.0 mA |
45.2 mA |
100% |
4,100 µMhos |
4,540 µMhos |
111% |
| SR.NO. 4728178 |
45.0 mA |
46.6 mA |
104% |
4,100 µMhos |
4,560 µMhos |
111% |