Zenith Amperex 12AU7 ECC82 " GF0 D9F " Vacuum Tube Results= 1980/1975

Description

Zenith Amperex 12AU7 ECC82 " GF0 D9F " Vacuum Tube
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***** Tested on our  proprietary  tester , the E3444.
It's a Triplett 3444 that has been enhanced.
This tester uses regulated power sources for the bias, plate, & screen voltages, as well as modified operating & testing procedures.
Filament voltage is also controlled.
Tubes are tested in accordance with the manufacturer's specifications; measurements closely align with a laboratory tester built to rigorously measure vacuum tube characteristics.
Tubes can be accurately matched for gm & plate current at the manufacturer's specified test points or at other specified test points.
***** This tester was prepared by Mr. Paul Hart of Roswell, GA  *****
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Industry Bogey transconductance  = 2200/2200 µmhos
Industry Bogey plate current = 10.0/10.0mA
Results   = 1980/1975 µmhos ~ 7.3/7.2mA
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