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

Matched Pair Tung-Sol 6K6 6K6GT Black Bottles Vacuum Tubes NOS-Testing Ken-Rad 35Z6 NOS NIBThis 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;

mesh plates

It has outstanding silkscreening and flashing

hanging filaments and outstanding flashing

excised chevrons in their top mica spacers as well as 210 5439 and 5413 provenance/date codes

The surface noise in the lead-in is moderate and as things progress it diminishes and things quiet down nicely

I have played it in my Alan Eaton singe-ended 45 amplifier (at 6

Tube One measured 1940 micromhos

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

This tube has steel support rods

Tube Two measured 2160/26

Tube One has some oxide flaking

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