Matched Pair Tung-Sol 6K6 6K6GT Black Bottles Vacuum Tubes NOS-Testing CBS NOS NIB 51/50 and 51/51

51/50 and 51/51

They have 4-39 188-5 and 3-43 188-5 date codes/EIA code

This matched pair of Westinghouse Reliatron 5U4GB rectifiers was tested on our Paul Hart-calibrated TV7/U for shorts

This Sylvania 3E6 tube tested to spec on our Paul Hart-calibrated TV7/U

things have obviously improved

Matched Pair Tung-Sol 6K6 6K6GT Black Bottles Vacuum Tubes NOS-Testing CBS NOS NIB 51/50 and 51/51This new old stock TESTING matched pair of Tung Sol 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 25. 6 milliamps' plate current and measured 2000 micromhos. Tube Two measured 25. 8 2040. New nominal is within one standard deviation of 1900. These tubes have pretty black bottles that entirely cover the top half of the tubes;