The Ken Rad 12AT7 is an extremely rare find. These were made in the USA by the Kentucky Radio company with black plates and D getters, prior to the GE buyout of Ken Rad. Some of the oldest 12AT7 we have in stock. Amazing fidelity and quality, made if the Golden Era of tube manufacturing in the USA.
12AT7 / ECC81 / CV4024 / CV455 / A2900 / B739 / ECC801S Dual Triode Vacuum Tubes