Rogers 6CG7 6FQ7 Vacuum Tube With Shields NOS-Testing 1D8GT Milspec This pressing has lightly-moderate surface

This pressing has lightly-moderate surface noise

These five Ken-Rad-MANUFACTURED 6U7 tubes were tested on our Paul Hart-calibrated TV7/U for shorts

Tube One measured 47/44 while Tube Two measured 48/43 where minimum (65%) is 25/25 and 100% is 38

This lot of three US-made 5763 tubes tested as follows on our Paul Hart-calibrated TV7/U:

new in box matched pair of GE-MANUFACTURED 12SL7 / 12SL7GT dual triodes was tested on our Pau Hart-calibrated TV7/U for shorts

Rogers 6CG7 6FQ7 Vacuum Tube With Shields NOS-Testing 1D8GT Milspec This pressing has lightly-moderate surfaceThis new old stock testing Canadian Rogers 6CG7 6FQ7 dual triode was tested on our TV7 for shorts, gas and transconductance. There were no shorts or gas. It measured a perfectly balanced 75 75 where minimum (65%) is 50 50. This tube has steel support rods; a top O getter and there is a shield between the triodes for reduced cross talk. I have played it in my Alan Eaton single ended 45 amplifier with an adapter and it sounds outstanding. It is dead