Matched Pair Raytheon 6K6 6K6GT Vacuum Tubes Valves Black Plates Clear Bottle 6AL5 Septal where minimum (65%) is 18/18

where minimum (65%) is 18/18 and 100% is 28/28

This lot of four new old stock

stout black plates

This matched pair of Ken-Rad 6C6 tubes tested 46 and 50

I just read the liner notes and I was right about this album sounding 15-20 years ahead of its time as it was

Matched Pair Raytheon 6K6 6K6GT Vacuum Tubes Valves Black Plates Clear Bottle 6AL5 Septal where minimum (65%) is 18/18This matched pair of Raytheon black plate, clear glass 6K6GT tubes was tested on our Maxi Matcher tube tester with 325 volts on the plates and a bias of 36 volts. Tube One drew 21 milliamps' plate current while Tube Two drew 22. 4. Transconductance was 1620 for Tube One and 1730 for Tube Two where new nominal is within one standard deviation of 1900. These tubes have tall bases; black plates; clear bottles and bottom, D getters. As I write, I am