Matched Pair General Electric GE 6K6 6K6GT Vacuum Tubes Black Glass NOS-Testing Majel Barrett Two have MISSING CENTERING PINS

Two have MISSING CENTERING PINS

There were no shorts and it measured a perfectly-balanced 44/44 where minimum (65%) is 34/32 and 100% is 52/52

copious flashing and a large

Tube One measured 1940 micromhos

They have 0-09 188-5 and 9-04 188-5 date / provenance codes

Matched Pair General Electric GE 6K6 6K6GT Vacuum Tubes Black Glass NOS-Testing Majel Barrett Two have MISSING CENTERING PINSThis new old stock TESTING 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 2200 micromhos, 34. 5 milliamps' plate current. Tube Two measured 2040 36. 1. New nominal is within one standard deviation of 1900. These tubes have copper support rods; rectangular mica spacers; black and