Matched Pair General Electric GE 6K6 6K6GT Vacuum Tubes Black Glass 6K6GT OG new in box European-MADE

new in box European-MADE

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

I have played them in my Radio Craftsmen RC-2 monoblocks and they sound great

new in box GE 8CG7 / 8FQ7 tubes tested to spec on our Paul Hart-calibrated TV7/U

This matched pair of Sylvania Type 27 triodes was tested on our Paul Hart-calibrated TV7/U for shorts

Matched Pair General Electric GE 6K6 6K6GT Vacuum Tubes Black Glass 6K6GT OG new in box European-MADEThis 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