Matched Pair Sylvania 6V6 6V6GT Vacuum Tubes Silver And Gray NOS-Testing National NOS NIB It measured 25/23 where minimum

It measured 25/23 where minimum (65%) is 18/18 and 100% is 28/28

This has been the best-sounding LP I played today on Thanksgiving

This Sylvania 6SF7 tube tested to spec on our Paul Hart-calibrated TV7/U

48 and 57 were minimum (65%) is 36 and 100% is 55

67 and 72 where minimum (65%) is 49

Matched Pair Sylvania 6V6 6V6GT Vacuum Tubes Silver And Gray NOS-Testing National NOS NIB It measured 25/23 where minimumThis matched pair of Sylvania silver and gray 6V6GT output tubes was tested on our Maxi Matcher 400 volts on the plates and a bias of 36 volts for shorts, gas and transconductance. There were no shorts or gas. Tube One drew 30. 6 milliamps with a transconductance of 3060 micromhos while Tube Two measured 31. 3 2640, (New US made 6V6s typically test with plate current from the mid teens to mid 30s with transconductance from 2300 micromhos or so.) These