RCL Mark 1 Model 105 GM Tube (ca. early 1950s)
|The Radiation Counter Laboratories Mark 1 Model 105 is described as a "miniature end window search counter." Its thin window permits the detection of alpha, beta and gamma radiation, and its small area permits the precise localization of small areas of contamination. The price? $65 in 1952.|
Size: 3 1/4" long, 3/4" diameter
Window: 7 mm diameter and 1 - 2 mg/cm2 thick
Cathode: Inner surface of glass wall coated with aquadag
Operating voltage: 850 volts
Gas: organic quenched
AEC Radiation Instrument
Catalog, page date
AEC Radiation Measurement Instruments, RIB-8 (supplement 2) July 1, 1954.
Nucleonics May 1952, page 89.
Last updated: 07/25/07
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