I do not remember who gave this to me but where the input jack would go on the pictures at the Civil Defense Museum is a plate holding the handle.
I suspect that this was some simplified supported version, or KI4U.com would not have calibrated it. Curious.
UPDATE: This is a 710 and there are others like this without an external probe.
the 710 is not a geiger counter. It uses an ionization chamber as a detector and is not terribly sensitive in the low ranges. It is, IIRC, Gamma only as well.
ReplyDeleteGreat for detecting fallout, not so much for low level stuff. IT gets saturated by REALLY high level stuff though, but it won't read the K in a banana.