Matched Pair Raytheon 6V6 6V6GT Vacuum Tubes Valves Black Glass Copper Support Rods NOS-Testing 6X8 Nonal T61 This matched pair of Sylvania

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

tall bottles

This historical recording sounds pretty good

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Matched Pair Raytheon 6V6 6V6GT Vacuum Tubes Valves Black Glass Copper Support Rods NOS-Testing 6X8 Nonal T61 This matched pair of SylvaniaThis matched pair of Raytheon black glass 6V6GT output tubes was tested on our Maxi Matcher 2 at real operating voltages of 400 volts on the plates and a bias of 36 volts for shorts, gas and transconductance. There were no shorts or gas. Transconductance was 2810 micromhos for Tube One and 2900 for Tube Two. Plate current draw was 32 and 32. 6 milliamps, respectively. (New US made 6V6s typically test with plate current from the mid teens to mid 30s