Matched Pair General Electric GE 12AU7 12AU7A ECC82 Vacuum Tubes Copper Support Rods L1 This quad of Ken-Rad-MANUFACTURED type

This quad of Ken-Rad-MANUFACTURED type 76 triodes was tested on our Paul Hart-calibrated TV7/U for shorts

5 -- maybe an eight -- out of ten

Transconductance measured 57 for both tubes where minimum (65%) is 40

24 and 24 where minimum (65%) is 25 and 100% is 38

mesh plate tubes both tested 32 on our Paul Hart-calibrated TV7/U where minimum (65%) is 25 and 100% is 38

Matched Pair General Electric GE 12AU7 12AU7A ECC82 Vacuum Tubes Copper Support Rods L1 This quad of Ken-Rad-MANUFACTURED typeThis matched pair of General Electric 12AU7 ECC82 dual triodes was tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas. Tube One measured 70 74 while Tube Two measured 71 69 where minimum (65%) is 56 56 and 100% is 87 87. These tubes have narrow 19 MM plates, each with three rectangular holes; O getters; copper support rods and good flashing. I have played them in my Radio Craftsmen RC 2