Description

Vintage Siemens 12AT7 ECC81 Vacuum Tube Very Strong & Balanced ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ The measurements provided were made on a Triplett 3444 that has been modified to test tubes in accordance with the original manufacturer’s stated test conditions, including bogey values. This includes the use of cathode bias where specified. This tester was prepared by Paul Hart of Roswell, GA. Further information is available on request. Industry Bogey transconductance = 5500|5500µmhos Industry Bogey plate current = 11.0|11.0mA Results = pictured ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ USA Shipping $6 I have many othertypes of tubes ~ No Additional Shipping Charges All tubesGuaranteed Thank you ~~~~ Please click on the link below to view moreitems in my store. ~~~~~~~~ GreenGirl'sGuaranteed VintageTubes 127