Rca Radiotron UX 112 A Vacuum Tube************************************************************************* 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 sp...ecifications; 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. ************************************************************************** Industry Bogey transconductance = µmhos Industry Bogey plate current = mA Results = pictured ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ USA Shipping $6 I have many other types of tubes Please Search My Store ~~~ No Additional Shipping Charges All tubes Guaranteed♪♪♫♫♫♫ Thank You! ♫♫♫♫♪♪ ov4 ~~~~ Please click on the link below to view more items in my store. ~~~~~~~~ GreenGirl's Guaranteed VintageTubes