Matched Pair Ken-Rad 6K6 6K6GT Vacuum Tubes Black Glass January 30 2026 58 and 60 where minimum

58 and 60 where minimum (65%) is 40 and 100% is 62

new in box milspec RCA 6CL6 tubes tested to spec on our Paul Hart-calibrated TV7/U

This lot of nine new old stock

These five Ken-Rad number / type 27 tubes tested as good on our Paul Hart-calibrated TV7/U

Matched Pair Ken-Rad 6K6 6K6GT Vacuum Tubes Black Glass January 30 2026 58 and 60 where minimumThis matched pair of Ken Rad 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 1770 micromhos, 23. 8 milliamps' plate current. Tube Two measured 1750 23. 9. New nominal is within one standard deviation of 1900. These tubes have copper support rods; rectangular mica spacers; black and silver bottles and