On 2011-01-06, Lewis Hartswick wrote:
DoN. Nichols wrote:
On 2011-01-03, Lewis Hartswick wrote:
[ ... ]
RADIAC SET
AN/PDR-27A
[ ... ]
Aha! A Geiger Counter (or similar). I wonder whether that is
the one which I have. Five decade ranges (IIRC), Hand-held probe for
the more sensitive ranges, internal tube for the less sensitive ranges.
Under the handle is a battery compartment for quite a few batteries.
Two size F cells (longer and a bit fatter than the standard D cells), a
15V battery, a 135V battery (which I made an adaptor to take two of the
45V snap contact batteries years ago, back when they were affordable.:-)
Sorry -- that should have been two of the 67-1/2V snap contact
batteries -- what you need to make 135V.
[ ... ]
Don I just looked at the battery list and it has a 135 V
JAN type BA-416U
And to make an adaptor for the to 67-1/2V batteries you need to
rivet two sets of snaps to some G-10 glass epoxy (or one of the later
replacements) to accept both batteries, and then a right angle to a meal
plate with an octal socket with an extra keyway filed into it to match
the weird plug (designed to prevent plugging into some other voltage
battery, I guess).
a 22.5V JAN type BA-413U
I mis-remembered the voltage of this one. It has been a while
since I last used it. (To be honest, I'm not quite sure where itis
at present. :-)
and 2 1.5V JAN type BA-401U
These I used to get by stripping apart either 1-1/2V or 6V
square lantern batteries -- but they may have something totally
different inside these days.
You're right about the two detectors. So you don't
want another copy I guess.
Depends. Having a second one would make me feel better about
making a DC-DC converter and running it off more readily available
rechargeable batteries instead.
The calibration/test rods have been through several half-lives
by now, so there might not be much to see there. :-)
What were you asking for it?
Enjoy,
DoN.
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