Matched Pair General Electric GE 12SN7 12SN7GTA Vacuum Tubes NOS-Testing 6K6 60 and 60 where minimum

60 and 60 where minimum (65%) is 40

This new old stock-testing RCA clear top 6CG7 / 6FQ7 dual triode was tested on our Paul Hart-calibrated TV7/U for shorts

3 rather than 12

a clear top with gray plates and excellent flashing

Matched Pair General Electric GE 12SN7 12SN7GTA Vacuum Tubes NOS-Testing 6K6 60 and 60 where minimumThis matched pair of new old stock testing General Electric GE 12SN7 12SN7GTA dual triodes was tested on our Jackson 648 Mutual Conductance tester for shorts, gas and transconductance. There were no shorts or gas. Tube One measured 95% 93% and 95% 94% for Tube Two. (New 6SN7s typically test from 2600 micromhos and the Jackson expresses this as a percentage.) I am playing them as I write in my Alan Eaton single ended 45 amplifier with RCA Living