Matched Pair General Electric GE 6K6 6K6GT Vacuum Tubes Black Glass 6K6GT OG (New US-made 6550s typically test

(New US-made 6550s typically test with plate current from the low 20s to mid 40s with transconductance from 3500 micromhos or so

IN NEARLY 9000 SALES

These seven Philco number / type 27 tubes tested as good on our Paul Hart-calibrated TV7/U

There is also a shield between the triodes for reduced cross talk

They have 7-09 188-5 and 630 188-5 date/provenance codes

Matched Pair General Electric GE 6K6 6K6GT Vacuum Tubes Black Glass 6K6GT OG (New US-made 6550s typically testThis 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 1630 micromhos, 23. 6 milliamps' plate current. Tube Two measured 1490 23. 88. New nominal is within one standard deviation of 1900. These tubes have copper support rods; rectangular mica spacers; black and silver bottles and 3 52