Matched Pair Hytron 6V6 6V6GT Vacuum Tubes Black Glass 6JM6A Compactron It is dead quiet when

It is dead quiet when the preamp is muted and has excellent frequency response and sound-staging

49 and 49 where minimum (65%) is 30 and 100% is 47

new in box Raytheon 6DS4 nuvistor tube tested to spec on our Paul Hart-calibrated TV7/U

it has no gross issues such as hum or microphonics and will work excellently in your audio device that calls for a 12AT7

28/27 and 33/26 where minimum (65%) is 18/18

Matched Pair Hytron 6V6 6V6GT Vacuum Tubes Black Glass 6JM6A Compactron It is dead quiet whenThis 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 (missing centering pin keyway): Tube Two: Plate current draw: 20. 5 milliamps Plate current draw: 21 milliamps Transconductance: 2200 micromhos Transconductance: 2270 micromhos (New US made 6V6s typically