Matched Pair Tung-Sol 6K6 6K6GT Vacuum Tubes Black Glass NOS-Testing Beautiful Engraved I am playing them one

I am playing them one at a time using a 6C4 to 6J5 adapter in one of my RC-2 monoblocks with Super Furry Animals' "Radiator" and they sound excellent

new in box Sylvania 9JW8 / PCF802 tube tested to spec on our Paul Hart-calibrated TV7/U

Otherwise it is sold as-is with no returns

almost-perfectly-matched pair of RCA (Hewlett-Packard By RCA) 6AG7 tubes were tested on our Paul Hart-calibrated TV7/U for shorts

It tested 48 in Section One and 46 in Section Two where minimum (65%) is 40/40 and 100% is 62/62

Matched Pair Tung-Sol 6K6 6K6GT Vacuum Tubes Black Glass NOS-Testing Beautiful Engraved I am playing them oneThis matched pair of Tung Sol black glass 6K6GT tubes was tested on our Maxi Matcher tube tester with 325 volts on the plates and a bias of 36 volts. Tube One drew 25. 6 milliamps' plate current while Tube Two drew 25. 8. Transconductance was 2000 for Tube One and 2040 for Tube Two where new nominal is within one standard deviation of 1900. As I write, I am playing them in my Mini Mite 2013 and they sound great. WE HAVE SCORES OF THOUSANDS OF VACUUM