3 CBS 6K6 6K6GT Vacuum Tubes Lot Of Three 4th Quarter BW40 This matched-pair of GE 6AU6A

This matched-pair of GE 6AU6A tubes was tested on our Paul Hart-calibrated TV7/U tube tester for shorts

These ten new old stock

new in box GE 25BK5 tube tested to spec on our Paul Hart-calibrated TV7/U

Tubes Two through Seven tested 40/38

7 for Tube Two

3 CBS 6K6 6K6GT Vacuum Tubes Lot Of Three 4th Quarter BW40 This matched-pair of GE 6AU6AThese three CBS 6K6GT tubes were tested on our Maxi Matcher 2 with 325 volts on the plates and a bias of 36 volts for shorts, gas, plate current and transconductance. There were no shorts or gas. Tube One measured 1380 micromhos and drew 10. 6 milliamps' plate current. Tubes Two and Three measured 1230 16. 7 and 1830 20. 2, respectively. New nominal is within one standard deviation of 1900. And they sounded fine in our Mini Mite 2013 WE HAVE SCORES OF