Matched Quad RCA 6FQ7 / 6CG7 Vacuum Tubes 35Z4GT Octal T04 new in box GE 12CX6

new in box GE 12CX6 tubes tested to spec on our Paul Hart-calibrated TV7/U

The spine is in fine shape with no loose pages and the dust jacket is without nicks or tears

new in box matched pair of Tung-Sol 12SL7 / 12SL7GT dual triodes was tested on our Pau Hart-calibrated TV7/U for shorts

new in box Sylvania 8LT8 tubes tested to spec on our Paul Hart-calibrated TV7/U

Tube One tested 54 in Section One and 54 in Section Two as well

Matched Quad RCA 6FQ7 / 6CG7 Vacuum Tubes 35Z4GT Octal T04 new in box GE 12CX6This 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 67 73 while Tube Two measured 69 68. Tubes Three and Four measured 69 69 and 72 69, 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