Coronado / Ken-Rad 6K6 6K6G Vacuum Tube Black And Silver Glass Shoulder ST-Shape NOS-Testing Plate Cap T27 They are exactly-the-same on the

They are exactly-the-same on the inside with the exception of the top mica spacers

new in box GE 6BW4 tube tested to spec on our Paul Hart-calibrated TV7/U

This hard cover book is in good condition

It has a top O getter

It has a dimpled sheet getter

Coronado / Ken-Rad 6K6 6K6G Vacuum Tube Black And Silver Glass Shoulder ST-Shape NOS-Testing Plate Cap T27 They are exactly-the-same on theThis new old stock testing Coronado BRANDED, Ken Rad MANUFACTURED 6K6 6K6G tube was tested on our Maxi Matcher II with 325 volts on the plates and a bias of 36 volts for shorts, gas and transconductance. There were no shorts or gas and it measured 2110 micromhos and drew 27. 1 milliamps' plate current. (New nominal transconductance is within one standard deviation of 1900.) WE HAVE SCORES OF THOUSANDS OF VACUUM TUBES. IF IT'S NOT LISTED, WE MAY HAVE