Matched Pair Tung-Sol 6K6 6K6GT Black Bottles Vacuum Tubes NOS-Testing Ken-Rad 35Z6 NOS NIB mesh plates

mesh plates

Tube Two measured 2160/26

Tube One has some oxide flaking

hanging filaments and outstanding flashing

(New US-made 6V6s typically test with plate current from the mid- teens to mid 30s with transconductance from 2300 micromhos or so

Matched Pair Tung-Sol 6K6 6K6GT Black Bottles Vacuum Tubes NOS-Testing Ken-Rad 35Z6 NOS NIB mesh platesThis 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. 3 milliamps' plate current and measured 2060 micromhos. Tube Two measured 25. 4 2080. New nominal is within one standard deviation of 1900. These tubes have pretty black bottles that entirely cover the top half of the tubes;