Matched Pair Sylvania Uncle Doug 6L6 6L6GC Vacuum Tubes Valves NOS-Testing October 10 2022 100% is 77/77

100% is 77/77

This lot of eight 6CG7 / 6FQ7 dual triodes was tested on our Paul Hart-calibrated TV7/U for shorts

There were no shorts or gas and they measured as follows:

External Diameter: +/- 21 MM

Matched Pair Sylvania Uncle Doug 6L6 6L6GC Vacuum Tubes Valves NOS-Testing October 10 2022 100% is 77/77This matched pair of new old stock TESTING Sylvania 6L6GC "Uncle Doug" output tubes was tested on our Maxi Matcher with 400 volts on the plates and a bias of 48 volts for shorts, gas and transconductance. There were no shorts or gas and they tested as follows: Tube One: Tube Two: Transconductance: 2490 micromhos Transconductance: 2670 micromhos Plate Current Draw: 31 Plate Current Draw: 34. 5 (New US made 6L6GCs typically test with plate current from