Matched Quad RCA 6FQ7 / 6CG7 Vacuum Tubes Песни На Стихи new in box RCA 6DW4B

new in box RCA 6DW4B tubes tested to spec on our Paul Hart-calibrated TV7/U

This matched pair of RCA-MANUFACTURED 6K6GT tubes was tested on our Maxi-Matcher 400 volts on the plates and a bias of -36 volts for shorts

The dust jacket is excellent shape

perfectly-matched pair of RCA 5879 tubes was tested on our Paul Hart-calibrated TV7

Matched Quad RCA 6FQ7 / 6CG7 Vacuum Tubes Песни На Стихи new in box RCA 6DW4BThis matched pair of RCA 6FQ7 6CG7 dual triodes was tested on our TV7 U for shorts, gas and transconductance. There were no shorts or gas and their readings are as follows: Tube One measured 69 72 while Tube Two measured 69 76. Tubes Three and Four measured 73 70 and 75 72, 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