Matched Pair Hytron 6V6 6V6GT Vacuum Tubes Black Glass NOS-Testing 6GT5 Compactron These four milspec Sylvania 5Z4

These four milspec Sylvania 5Z4 rectifier tubes were tested on our Paul Hart-calibrated TV7/U for shorts

Tube Two probably has a piece of broken glass in it

Tube one measured 45 in its triode section where minimum (65%) is 29 and 100% is 45

new in box RCA 1AC5 tube -- and another just like it -- tested to spec on our Paul Hart-calibrated TV7/U

There were no shorts or gas and it measured 2110 micromhos and drew 27

Matched Pair Hytron 6V6 6V6GT Vacuum Tubes Black Glass NOS-Testing 6GT5 Compactron These four milspec Sylvania 5Z4This new old stock testing matched pair of Hytron 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 and they tested as follows: Tube One: Tube Two: Plate current draw: 26. 3 milliamps Plate current draw: 28. 4 milliamps Transconductance: 2540 micromhos Transconductance: 2390 micromhos (New US made 6V6s typically test with