2 Vintage RCA 12AT7 ECC81 Radio Tubes Results= 4900/4150 10.1/7.0 mA 4590/4410
$ 14.26
Description
2 Vintage RCA 12AT7 ECC81 Radio Tubes ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ***** 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. ***** ********************************************************************* Industry Bogey transconductance = 5500/5500 µ mhos & Industry Bogey plate current = 11.0/11.0 mA Results = 4900/4150 µ mhos ~ 10.1/7.0 mA 4590/4410 µ mhos ~ 8.6/7.9 mA ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Unlimited combined Shipping USA $6 All tubes are Guaranteed Search My store by brand , number and internal construction Thank You AAA ~~~~ Please click on the link below to view more items in my store. ~~~~~~~~ GreenGirl's Guaranteed VintageTubes
