3 CBS 6K6 6K6GT Vacuum Tubes Valves Lot Of Three Lot Of Five This hardcover book -- and

This hardcover book -- and its dust jacket -- is in very good condition

new in box Sylvania 1X2 tubes tested to spec on our Paul Hart-calibrated TV7/U

new in box Japanese Magnavox 10DE7 tube tested to spec on our Paul Hart-calibrated TV7/U

Charles Treger and Charles Wadsworth

3 CBS 6K6 6K6GT Vacuum Tubes Valves Lot Of Three Lot Of Five This hardcover book -- andThese three CBS 6K6GT tubes were tested on our Maxi Matcher 2 with 325 volts on the plates and a bias of 36 volts for shorts, gas, plate current and transconductance. There were no shorts or gas. Tube One measured 1380 micromhos and drew 10. 6 milliamps' plate current. Tubes Two and Three measured 1230 16. 7 and 1830 20. 2, respectively. New nominal is within one standard deviation of 1900. And they sounded fine in our Mini Mite 2013 WE HAVE SCORES OF