Sylvania 12BH7 Black Points Vacuum Tube Results= 2650/2300

Description

Sylvania 12BH7 Black Points Vacuum Tube
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***** Tested on our  proprietary  tester , the E3444 Triplett/Westmore 501 :
It's a Triplett 3444 / Westmore 501 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 = 3100/3100  µmhos  &
Industry Bogey plate current =  11.5/11.5mA
Results = 2650/2300
µmhos  ~  8.2/8.4mA
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