Matched Trio RCA 6FQ7 / 6CG7 Vacuum Tubes NOS-Testing September 15 2024 This General Electric 22JF6 tube

This General Electric 22JF6 tube tested 75 on our Paul Hart-calibrated TV7/U where minimum is 54 and new is 100

new in box US-made 117L7GT / 117M7GT tubes tested to spec on our Paul Hart-calibrated TV7/U

Transconductance measured 64 for Tube One and 68 for Tube Two tubes where minimum (65%) is 40

Mica Spacers

There were no shorts or gas and it measured 40/37 where minimum (65%) is 32/32 and 100% is 49/49

Matched Trio RCA 6FQ7 / 6CG7 Vacuum Tubes NOS-Testing September 15 2024 This General Electric 22JF6 tubeThis new old stock testing matched trio 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 74 76 while Tube Two measured 76 76. Tube Three measured 76 76 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