Matched Pair RCA Black Plate 6CG7 6FQ7 Vacuum Tubes Valves With Shields Valvo NOS-Testing The remaining two are labeled

The remaining two are labeled "1X2B

Minimum is 25

not included) and they sound excellent

This tube has two additional vertical support rods

Matched Pair RCA Black Plate 6CG7 6FQ7 Vacuum Tubes Valves With Shields Valvo NOS-Testing The remaining two are labeledThis matched pair of RCA black plate 6CG7 6FQ7 dual triodes was tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas. Tube One measured 68 68 while Tube Two measured 74 74 where minimum (65%) is 50 50 and 100% is 77 77 These tubes have steel support rods and copper support rods for their harp shaped getters. There is a shield between the triodes for reduced cross talk. I have played them in my AC