Matched Pair Ken-Rad 6V6 6V6GT 6P6 6P6P Vacuum Tubes Black Glass October 09 2025 dark gray rounded plates and

dark gray rounded plates and outstanding flashing

almost-perfectly-matched pair of Sylvania-MANUFACTURED 6BL7GTA dual triodes was tested on our Paul Hart-calibrated TV7/U for shorts

GM-Delco-BRANDED 6AX8 tubes tested to spec on our Paul Hart-calibrated TV7/U

This new old stock-testing matched quad of Sylvania 7A7 tubes was tested on our Hickok 800 and all measured 1900 micromhos where new/nominal is 2000 and minimum (65%) is 1300

Matched Pair Ken-Rad 6V6 6V6GT 6P6 6P6P Vacuum Tubes Black Glass October 09 2025 dark gray rounded plates andThis matched pair of Ken Rad black glass 6V6GT output tubes was tested on our Maxi Matcher 2 with 400 volts on the plates and a bias of 36 volts for shorts, gas and transconductance. There were no shorts or gas. Tube One measured 14. 5 milliamps' plate current, 1960 micromhos and 15. 3 2310 for Tube Two. (New US made 6V6s typically test with plate current from the mid teens to mid 30s with transconductance from 2300 micromhos or so.) These tubes have