Matched Pair Ken-Rad 6K6 6K6GT Vacuum Tubes Black Glass 12 Volt Tray new in box RCA 6AG7

new in box RCA 6AG7 tubes tested to spec on our Paul Hart-calibrated TV7/U

totally unsuited for use in guitar amps or any other vibratory environment

(New 807s typically test from the mid teens to mid 30s with transconductance from 2200 micromhos)

nostalgic Coke bottle shape

Matched Pair Ken-Rad 6K6 6K6GT Vacuum Tubes Black Glass 12 Volt Tray new in box RCA 6AG7This matched pair of Ken Rad MANUFACTURED 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 1930 micromhos, 29. 4 milliamps' plate current. Tube Two measured 1780 29. 5. New nominal is within one standard deviation of 1900. These tubes have copper support rods; rectangular mica spacers; black and silver