Matched Pair Tung-Sol 6K6 JAN-CTL-6K6GT Milspec Black Bottles Vacuum Tubes NOS-Testing 6CU6 Plate Caps excellent silkscreening and 312 132

excellent silkscreening and 312 132 provenance/date codes

new in box International Servicemaster 19CG8 tube tested to spec on our Paul Hart-calibrated TV7/U

I am playing them in my Bottlehead Crack headphone amplifier as I write

5-7 out of 10

Matched Pair Tung-Sol 6K6 JAN-CTL-6K6GT Milspec Black Bottles Vacuum Tubes NOS-Testing 6CU6 Plate Caps excellent silkscreening and 312 132This new old stock TESTING matched pair of Tung Sol milspec JAN CTL 6K6GT tubes was tested on our Maxi Matcher 400 volts on the plates and a bias of 36 volts for shorts, gas and transconductance. There were no shorts or gas. Tube One drew 22. 7 milliamps' plate current and measured 1900 micromhos. Tube Two measured 24 1860. New nominal is within one standard deviation of 1900. These tubes have pretty black bottles that entirely cover the top half of