RCA 12AT7 ECC81 Black Plates Vacuum Tube Results= 3800/4000
$ 12.67
Description
RCA 12AT7 ECC81 Black Plates Vacuum Tube ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ ***** 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 = 3800/4000 µmhos ~ 7.8/8.4mA ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ USA Shipping $6 I have many other types of tubes ~ No Additional Shipping Charges All tubes Guaranteed Thank you ~~~~ Please click on the link below to view more items in my store. ~~~~~~~~ GreenGirl's Guaranteed VintageTubes 17J317
