Matched Pair General Electric GE 6K6 6K6GT Vacuum Tubes Black Glass North Carolina Press This Telefunken ECH81 / 6AJ6

This Telefunken ECH81 / 6AJ6 was tested on our Paul Hart-calibrated TV7 for shorts

One is milspec and one is a Cunningham

12AT7s are notorious for their unmatched triodes and their deviation from nominal parameters

Picture Three) and 2500 for Tube Two (Cracked base

The title says it all

Matched Pair General Electric GE 6K6 6K6GT Vacuum Tubes Black Glass North Carolina Press This Telefunken ECH81 / 6AJ6This matched pair of GE 6K6 6K6GT tubes was tested on our Maxi Matcher 2 with 325 volts on the plates and a bias of 36 volts for shorts, gas, plate current and transconductance. There were no shorts or gas. Tube One measured 1570 micromhos, 19. 6 milliamps' plate current. Tube Two measured 1650 20. 2. New nominal is within one standard deviation of 1900. These tubes have copper support rods; rectangular mica spacers; black and silver bottles and 2 04