Matched Quad RCA 6FQ7 / 6CG7 Vacuum Tubes 35Z4GT Octal T04 This Korean War-vintage tube has

This Korean War-vintage tube has US Army Signal Corps SC 402 contract codes and 1-44 date codes

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

wing-plates

Tube One measured 60/56 while Tube Two measured 61/58 where minimum (65%) is 50/50 and 100% is 77/77

Sperry-BRANDED (SPL) 6V6GT output tubes was tested on our Maxi-Matcher 2 in Real World conditions with 400 volts on the plates and a bias of -36 volts for shorts

Matched Quad RCA 6FQ7 / 6CG7 Vacuum Tubes 35Z4GT Octal T04 This Korean War-vintage tube hasThis 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