Tracerlab TGC-3A End Window GM Tube
Tracerlab's model TGC-3, like the TGC-1 and TGC-2, was a glass-walled end window GM tube designed for beta counting. The earliest reference I have found for it is 1950. The TGC-3 and TGC-3A tubes were exactly the same. The difference was that the TGC-3 came with a set of beryllium and copper absorbers (disks).
Kindly donated by Randy Liebermann.
Size: 3.85” long and 1.5” inner diameter
Window Thickness: 1.9 mg/cm2 mica
Wall: glass, > 300 mg/cm2, stainless steel on inside
Anode: Tungsten central wire.
Operating voltage: 1100 - 1400 V
Plateau length: 300 volts
Fill gas: argon
Fill gas pressure: 720 mm Hg
Dead time: ca. 200 us
Base: four prong ceramic base:
Advertisement. Nucleonics July 1949. inside front cover;
AEC Radiation Instrument Catalog, page date May 1, 1950;
Tracerlog No. 30 price list, November 1950; Tracerlab Inc, Catalog E, March 1958;
Tracerlog No. 30 price list, November 1950;
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