General Electric GE 12AT7 ECC81 6679 Vacuum Tube Premium Matched Pair 6DQ5 Two have MISSING CENTERING PINS

Two have MISSING CENTERING PINS

not included) in my AC-heated Alan Eaton single-ended 45 amplifier and they sound OK

3 milliamps' plate current while Tube Two drew 23

It measured 58/56 where minimum (65%) is 40/40 and 100% is 62/62

Tube Two measured 2930/21

General Electric GE 12AT7 ECC81 6679 Vacuum Tube Premium Matched Pair 6DQ5 Two have MISSING CENTERING PINSThis industrial grade GE 6679 12AT7 dual triode was tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas. It measured 69 65 where minimum (65%) is 50 50 and 100% is 77 77. It has gray, wing plates; a top, O getter and excellent flashing. I am playing them in my Bottlehead Crack headphone amplifier as I write. The Bottlehead calls for a 12AU7 which is a pretty different tube. That said, it has no