Matched Pair RCA Black Plate 6CG7 6FQ7 Vacuum Tubes Valves With Shields Valvo NOS-Testing Minimum is 25

Minimum is 25

It has outstanding silkscreening and flashing

not included) and they sound excellent

This is a Dutch auction for GE-MANUFACTURED gray plate 35W4s

This Sylvania triple mica 12AU7A / ECC82 dual triode was tested on our Paul Hart-calibrated TV7/U for shorts

Matched Pair RCA Black Plate 6CG7 6FQ7 Vacuum Tubes Valves With Shields Valvo NOS-Testing Minimum is 25This 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