Westinghouse 2249 Tube (ca. 1930s)
In terms of the tube itself, there is nothing very remarkable about this Westinghouse Model W-2249. It is a single focus tube with a square tungsten target embedded in a copper head. What is somewhat unusual, at least to me, is the design of the radiator seen at the right end of the tube in the top photo. Rather that consisting of a series of thin copper plates that would maximize the surface area, this radiator seems to be a block of a nickel coated copper-zinc alloy with six holes drilled through it.
Size: ca. 14" long (excluding radiator), 3 3/4" bulb diameter
Donated by the University of Kansas courtesy of Michael Lemon.