RCA 12AT7 Vacuum Tube Black Plates
$ 12.67
Description
RCA 12AT7 Vacuum Tube Black Plates ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ **** 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 =4200|4950 µmhos ~ 7.8|9.8mA 🎶🎶🎶🎶🎶🎶🎶🎶🎶🎶🎶🎶🎶🎶🎶🎶 🎶🎶🎶🎶🎶🎶🎶🎶🎶🎶🎶🎶🎶🎶 🎶🎶🎶🎶🎶🎶🎶🎶🎶🎶🎶 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 113
