Victoreen Model 631 "Vic-Tic" (1955-1960)
manufactured by the Victoreen Instrument Co., was primarily intended for
use where a heavy rugged instrument was not needed. Victoreen described
its application as follows: "For vacation and part time prospecting,
school science class." The
detector was an aluminum walled GM tube (1B85) housed inside the gold
colored case. It had two distinguishing features. First, it was
small (6.5" x 4.5" x
3.5") and light (3 pounds).
Second, it employed a transistor-amplified speaker (rather than
Three accessories were
available for the Vic-Tic: an external hand-held GM probe that was plugged
into a jack on the front of the case, a "deep hole probe" with
100 feet of cable, and what Victoreen referred to as
the “Bismuth Six Pack,” an assembly of six bismuth screened GM tubes
that could be fastened to the bottom of the meter case.
Detector: thin walled 1B85 tube on inside bottom of case with thin window in case. Optional external hand held GM probe.
Ranges: 0 – 1,000, 0 – 10,000 and 0 –100,000
"plus an extra sensitive background range": 0-2000 cpm
"plus an extra sensitive background range": 0-2000 cpm .
Batteries: one 1 1/2 volt, one 67 1/2 volt cell.
Size: 6 1/2" x 3 1/2" x 4 1/2"
Weight: 3 lbs.
Price: $125 in 1955.
Donated by the Victoreen Instrument Company
Advertisement, Nucleonics January 1955, p. 57
Victoreen Instrument Company Brochure. Portable Radiation Survey meters. No date.
Copyright 1999, Oak Ridge Associated Universities