Matched Pair Ken-Rad 6K6 6K6GT Vacuum Tubes Black Glass 12 Volt Tray There were no shorts or

There were no shorts or gas and they measured as follows:

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

This matched pair of Raytheon black glass 6V6GT output tubes was tested on our Maxi-Matcher 2 at real operating voltages of 400 volts on the plates and a bias of -36 volts for shorts

three round

Matched Pair Ken-Rad 6K6 6K6GT Vacuum Tubes Black Glass 12 Volt Tray There were no shorts orThis 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