Hi, I am new to this group. I have just got an Ex British Military GC, model number SCG0034. I have repaired the indicator unit, the fault being a number of...
Hi Keith an welcome to the group, I think the SCG0034 number should be 5CG0034, this is just one part, the complete set is 5CG0012 and is a "contamination...
Thanks Robert, I've dropped them a line to see how much they charge. As for eBay, this is where the counter came from, so I am reluctant to purchase another GC...
I'm thinking of making a simple cloud chamber but I was hoping to use a water fog, such as from one of those ultrasonic humidifiers, as a source for the fog....
Interesting, and well worth the effort. Please report back, great idea! Geo ... From: Jim Markitell To: GeigerCounterEnthusiasts@yahoogroups.com Sent: Sunday,...
The supersaturated area is necessary for the cloud chamber to work. You also need a temperature difference between the top and the bottom of the chamber....
Although good hard data on cloud chamber design is hard to come by on the web, I did find a treasure trove of scientific papers, some by Wilson himself, at...
Dry ice used to be the classic way to cool a "science fair" cloud chamber. I wonder if one of those large TE modules used for the portable "beer coolers" meant...
From what I have read water vapor will not work. Even alchol with a small amount of water will not perform well. There are several sites on the web on "making...
Dry ice sublimes into vapor at -78.5°C (-109.3°F). You'd have to stack three of those modules to match the cool-down. You'll need a large heat sink on the...
... Hi Jim! I think the water vapor droplets from a humidifier are too big for a cloud chamber. AFAIK, only alcohol vapor will work. I attended the cloud...
... create the ... Expanding air cools it so you get condensation. That's how a piston-operated chamber works. Also why very fast jets create clouds over...
Are there stable isotopes which exist but are not naturally occurring on earth? I understand the whole supernova element factory/solar system origins stuff....
... None are known. Supernova created everything up to Cf (and probably past that). What is interesting is that many (if not most or close to all ) "stable"...
... on ... isotopes ... That supposes that the novae that create the heavier elements somehow avoid some creation reaction that people can do. What makes you...
... How so? With the exception of K, U, Th, and some cosmic-ray debris constantly reforming, everything is stable or gone. The 'stable' Bi isotope was found...
... Apparently some of the "stable" nuclides really aren't, and have very long half lives, in the circa 10^18 yr range. I had a nice list of some of them, but...
Hi, I just aquired two ADM-300A Multi-function survey meters with Beta scintillator probes. These have two minature connectors. One is for the probe and the...
Notice that the Eberline E-120 mR/h meter's scale is not for use with the more sensitive HP-190A end window probe but rather the HP-270 energy compensated...
Robert, those should still be a current item. Nice find! Geo ... From: Robert Atkinson To: GeigerCounterEnthusiasts@yahoogroups.com Sent: Friday, May 06, 2005...
... Hi Geo, Yes the ADM-300 is still current. The Beta probe (BSP-100) is not listed. The units were direct UK Navy surplus, made in 2001, current calibration...
Hi, I have finally got my old British Army Contamination Meter No.1 (dated 1955) fully functional again. Needed to replace a few capacitors and put in a new...
Hi Keith, Well done on getting this classic going again. I Guess you are getting 1 or 2 clicks every few secons as background. The CV2446 is a Gamma tube, but...
... You can also stack them - piping the heat from the hot side to a larger peltier to cool it, thus lowering the cold side of the colder peltier even more,...
... Maybe trying the mister in alcohol instead of water then. I suspect it will mist alcohol, but that the misted alcohol won't work as a coud chamber because...
The specs( I looked it up)on one of the TE modules said the NO LOAD temperature differential was close to 80F degrees. If you could keep the thermal load...
Canberra (UK) came up with the goods. For reference the auxillary connector pin out are, Pin 1 +5V out Pin 2 RS232 TX (to pin 2 0f PC 9W D) Pin 3 RS232 RX (to...
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