Matched Pair Tung-Sol 6K6 6K6GT Vacuum Tubes Black Glass Philco 1D8 1D8GT This new old stock-testing RCA

This new old stock-testing RCA 6680 / 12AU7A / ECC82 dual triode was tested on our Paul Hart-calibrated TV7/U for shorts

WE HAVE SCORES OF THOUSANDS OF VINTAGE ELECTRONIC ITEMS

new in box GE 10JA5 tubes tested to spec on our Paul Hart-calibrated TV7/U

This beautiful

new in box GE 6BD6 tubes tested to spec on our Paul Hart-calibrated TV7/U

Matched Pair Tung-Sol 6K6 6K6GT Vacuum Tubes Black Glass Philco 1D8 1D8GT This new old stock-testing RCAThis 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 26. 6 milliamps' plate current while Tube Two drew 27. 6. Transconductance was 1900 for Tube One and 1800 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