Matched Pair Tung-Sol 6K6 6K6GT Vacuum Tubes Black Glass NOS-Testing May 07 2022 These four RCA and Cunningham

These four RCA and Cunningham number / type 27 tubes tested as low goodand good on our Paul Hart-calibrated TV7/U

THIS IS NOT AMAZON

This new old stock-testing matched pair of RCA 6BL7GTA dual triodes was tested on our TV7/U for shorts

but has GE 188-5 and a sutured top

new in box Raytheon 12K5 tube tested to spec on our Paul Hart-calibrated TV7/U

Matched Pair Tung-Sol 6K6 6K6GT Vacuum Tubes Black Glass NOS-Testing May 07 2022 These four RCA and CunninghamThis 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 21. 3 milliamps' plate current while Tube Two drew 23. Transconductance was 1890 for Tube One and 2000 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