RCA Black Plate 6CG7 6FQ7 Vacuum Tube With Shields NOS-Testing Number Type 30 They have been tested on

They have been tested on our Paul Hart-calibrated TV7/U where minimum (65%) is 40 and have the following values in descending order:

This Raytheon 2B7 tube tested to spec on our Paul Hart-calibrated TV7/U

new in box Sylvania 12AB5 tubes tested to spec on our Paul Hart-calibrated TV7/U

2 for Tube Two

These two new old stock

RCA Black Plate 6CG7 6FQ7 Vacuum Tube With Shields NOS-Testing Number Type 30 They have been tested onThis new old stock testing RCA black plate 6CG7 6FQ7 dual triode was tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas. It measured a perfectly balanced 80 80 where minimum (65%) is 50 50. This tube has steel support rods; a harp getter and matte black plates. There is a shield between the triodes for reduced cross talk. I have played it in my Schiit Vali 2 headphone amplifier and it sounds