Matched Pair Raytheon 6V6 6V6GT Vacuum Tubes Valves Black Glass Copper Support Rods NOS-Testing 6X8 Nonal T61 This historical recording sounds pretty

This historical recording sounds pretty good

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Transconductance measured 44 and 48 where minimum (65%) is 35 and 100% is 54

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Matched Pair Raytheon 6V6 6V6GT Vacuum Tubes Valves Black Glass Copper Support Rods NOS-Testing 6X8 Nonal T61 This historical recording sounds prettyThis 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