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

a button/thimble getter and excellent flashing

GM-Delco-BRANDED 6AX8 tubes tested to spec on our Paul Hart-calibrated TV7/U

This tube has two additional vertical support rods

It has outstanding silkscreening and flashing

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