3 Westinghouse Black Plate 6CG7 6FQ7 Vacuum Tubes With Shields Lot Of Three Facades Suites perfectly-matched pair of RCA black

perfectly-matched pair of RCA black plate

new in box CBS-Hytron 12BZ7 tube tested to spec on our TV7/U

Transconductance measured 57 for Tube One and 65 for Tube Two where minimum (65%) is 36 and 100% is 55

new in box CBS 12DB5 tube tested to spec on our Paul Hart-calibrated TV7/U

3 Westinghouse Black Plate 6CG7 6FQ7 Vacuum Tubes With Shields Lot Of Three Facades Suites perfectly-matched pair of RCA blackThis trio of Westinghouse 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 and they measure as follows: 66 65, 72 76 and 92 90 where minimum (65%) is 50 50 and 100% is 77 77 These tubes have copper support rods; top, harp shaped getters and shields between the triodes for reduced cross talk. I have played them with adapters (not included) in my Radio