GM Tube of Unknown Manufacture (ca. 1940s, early 1950s)

GM Unknown Manufacturer

Unfortunately there is nothing on this tube that would indicate the name of the manufacturer. Some of the companies that made tubes similar to this during the 1940s and early 1950s included, Technical Associates, Radiation Counter Laboratories, Raytheon, Kelley-Koett, and the Nuclear Instrument and Chemical Corporation.

The tube is approximately 7 1/2" long and 5/8" in diameter. The glass body has been painted black which indicates that the unpainted tube would be photosensitive. The cathode appears to consist of a silver coating on the inside of the glass wall.

Donated by Ron Kathren.