Unbalanced Telefunken Fisher 12AT7 ECC81 Vacuum Tube <>~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ **** Tested on our proprietary tester , the E3444. Its 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 manufacturers 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 manufacturers specified test points or at other specified test points. ***** This tester was prepared by Mr. Paul Hart of Roswell, GA ********************************************************************* Industry Bogey transconductance = 5500|5500µmhos Industry Bogey plate current =11.0|11.0mA Results = 5000|3000µmhos ~ 11.0|6.4mA ????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????USA Shipping $6I have many other types of tubes ~ No Additional Shipping ChargesAll tubes Guaranteed ?????? Thank You! ?????? ~~~~ Please click on the link below to view more items in my store. ~~~~~~~~ GreenGirls Guaranteed VintageTubes127

Telefunken 12AT7 ECC81 Vacuum Tube <> Print is Gone Tested on Hickok 6000A Micromhos Nominal NOS = 3000/3000 Min = 1800/1800 Results = 4000/3675 USA Shipping $6 I have many other types of tubes ~ No Additional Shipping Charges All tubes Guaranteed THANK YOU! 148 ~~~~ Please click on the link below to view more items in my store. ~~~~~~~~ GreenGirls Guaranteed VintageTubes

Unbalanced Telefunken Fisher 12AT7 ECC81 Vacuum Tube <>~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ **** Tested on our proprietary tester , the E3444. Its 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 manufacturers 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 manufacturers specified test points or at other specified test points. ***** This tester was prepared by Mr. Paul Hart of Roswell, GA ********************************************************************* Industry Bogey transconductance = 5500|5500µmhos Industry Bogey plate current =11.0|11.0mA Results = 5000|3000µmhos ~ 11.0|6.4mA ????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????USA Shipping $6I have many other types of tubes ~ No Additional Shipping ChargesAll tubes Guaranteed ?????? Thank You! ?????? ~~~~ Please click on the link below to view more items in my store. ~~~~~~~~ GreenGirls Guaranteed VintageTubes127

Telefunken 12AT7 ECC81 Vacuum Tube <> Print is Gone Tested on Hickok 6000A Micromhos Nominal NOS = 3000/3000 Min = 1800/1800 Results = 4000/3675 USA Shipping $6 I have many other types of tubes ~ No Additional Shipping Charges All tubes Guaranteed THANK YOU! 148 ~~~~ Please click on the link below to view more items in my store. ~~~~~~~~ GreenGirls Guaranteed VintageTubes

Unbalanced Telefunken Fisher 12AT7 ECC81 Vacuum Tube <>~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ **** Tested on our proprietary tester , the E3444. Its 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 manufacturers 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 manufacturers specified test points or at other specified test points. ***** This tester was prepared by Mr. Paul Hart of Roswell, GA ********************************************************************* Industry Bogey transconductance = 5500|5500µmhos Industry Bogey plate current =11.0|11.0mA Results = 5000|3000µmhos ~ 11.0|6.4mA ????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????USA Shipping $6I have many other types of tubes ~ No Additional Shipping ChargesAll tubes Guaranteed ?????? Thank You! ?????? ~~~~ Please click on the link below to view more items in my store. ~~~~~~~~ GreenGirls Guaranteed VintageTubes127