This x-ray tube is a early "heavy anode" focus tube with a focusing ring made by the MacAlister-Wiggin, Co. of Chicago, Ill. It is marked: TRANSFORMER TUBE and has a serial number. It also has a "Queen Pat." number. The Queen Co. made x-ray tubes in Pennsylvania and the patent refers to the auto-regeneration device at the top of the tube.
Length = 21.00" Diameter = 8.50"
Max voltage =
Max current = GOTO INDEX
