General Electric KR-7 Valve Tube |
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A General Electric KR-7 valve tube, or at least that is what I believe it
is. Unfortunately, any identifying markings have long since
disappeared. You have
to suspect that the inspiration for the design was the old-time glass
insulator used with power lines. This particular tube belonged to M. J. Gross who worked with Dr. Coolidge at General Electric in Schenectady N.Y. Gross later became Vice President of the GE X-ray Company. During the 1930s and 1940s, Gross and Zed Attlee formed the core of Coolidge's research and design team. Size: approximately 7" long, 3 1/2" maximum diameter Kindly donated by Linda Sinrod in memory of Malvern J Gross |
