Matched Quad RCA 6FQ7 / 6CG7 Vacuum Tubes 6K6 Black And Silver These tubes have tall bottles

These tubes have tall bottles

2 milliamps with a transconductance of 5640 micromhos

67 and 74 where minimum (65%) is 53

This Sylvania 12V66GT chrome dome / silver top power tube was tested on our Paul Hart-calibrated TV7 for shorts

There are four new old stock

Matched Quad RCA 6FQ7 / 6CG7 Vacuum Tubes 6K6 Black And Silver These tubes have tall bottlesThis matched quad of RCA 6FQ7 6CG7 dual triodes was tested on our TV7 for shorts, gas and transconductance. There were no shorts or gas and their readings are as follows: They measured 66 59, 68 58, 68 62 and 70 60, respectively, where minimum (65%) is 50 50 and 100% is 77 77. These tubes have steel support rods; ladder plates; side D getters and excellent flashing. As I write, I am playing them with adapters (not included) in my Radio Craftsmen RC 2