3 Vintage Tall Japanese 6SN7 GTB Radio Tubes V Strong
***** Tested on our new 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 Falls Church , Virginia. *****
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Industry Bogey transconductance = 2600/2600 µmhos &
Industry Bogey plate current = 9.0/9.0 mA
Results =
2720/2760 µmhos ~ 9.2/9.4 mA Raytheon
2520/2620 µmhos ~ 7.6/8.2 mA Channel Master
2925/2900 µmhos ~ 8.0/8.5 mA Channel Master
Shipping $6 USA
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