Matched Pair RCA 6K6 6K6GT Vacuum Tubes Gray Glass June 06 2024 Tube One measured 69/72 while

Tube One measured 69/72 while Tube Two measured 69/76

I have played them (with adapters

This lot of three Raytheon 12AX4GT / 12AX4GTA / 12AX4GTB tubes tested to spec on our Paul Hart-calibrated TV7/U

And they sounded fine in our Mini Mite 2013

Matched Pair RCA 6K6 6K6GT Vacuum Tubes Gray Glass June 06 2024 Tube One measured 69/72 whileThis matched pair of RCA MANUFACTURED gray 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 18. 3 milliamps' plate current while Tube Two drew 19. 6. Transconductance was 1370 for Tube One (Admiral LABELED, RCA MANUFACTURED) and 1350 for Tube Two (Philco LABELED, RCA MANUFACTURED) where new nominal is within one standard deviation of 1900. As I write, I am playing them in