RCA Mullard EL34 6CA7 Vacuum Tube "xf4" Very Strong
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***** Tested on our proprietary tube tester, the E3444.
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 Falls Church , Virginia. *****
Mr. Hart maintains all of our testers exclusively.
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Industry Bogey transconductance = 11,000 µmhos
Industry Bogey plate current = 100 mA
Results =
14,200 µmhos ~ 104 mA
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