Matched Pair Tung-Sol 6K6 6K6GT Black Bottles Vacuum Tubes NOS-Testing 0A4G Regulator perfectly-matched pair of RCA black

perfectly-matched pair of RCA black plate

Raytheon-LABELED

In addition

These three Sylvania 6F5s were tested on our Paul Hart-calibrated TV7/U for shorts

These seven Ken-Rad 12K8 tubes tested to spec on our Paul Hart-calibrated TV-7/U

Matched Pair Tung-Sol 6K6 6K6GT Black Bottles Vacuum Tubes NOS-Testing 0A4G Regulator perfectly-matched pair of RCA blackThis 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 31. 8 milliamps' plate current and measured 2060 micromhos. Tube Two measured 32. 5 2140. New nominal is within one standard deviation of 1900. These tubes have pretty black bottles that entirely cover the top half of the tubes;