Unused Sylvania JHS 12AT7 WA ECC81 Vacuum Tube D-Getter Very Strong & Balanced
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
***** 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 *****
*********************************************************************
Industry Bogey Transconductance = 5500/5500 µmhos
Industry Bogey Plate Current = 11.0/11.0mA
Results = 5960/6080 µmhos ~ 12.5/13.0mA
♫♫♫♫♫♫♫♫♫♫♫♫♫♫♫♫♫♫♫♫♫♫♫♫♫♫♫♫♫♫♫♫
♪♪♫♫♫♫ Thank You! ♫♫♫♫♪♪
GreenGirl's Guaranteed VintageTubes