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When I tried the alpha counter, I used the television screen as a "concentrator", but still no sign of the daughters. We are in a fairly high radon area, because of the nearness of the granite to the surface in our geology... but not as bad as some areas. Smoke detectors are a favorite source...

I am aware that a GM detector doesn't read the alpha decay of Rn222. I have an Eberline alpha counter that can, but I haven't noticed any reading in my environment, so I might not have all that much radon. Because at any given point in time a certain percentage of the Rn222 is alpha decaying...

I presume by "frisker" you are referring to just about any G-M tube counter that has its G-M tube at the end of a cable, and has a mica beta window? The usual radon detector setup is an ionization chamber that lets the room air into the chamber, and looks for an electrostatic charge change due...

Sorry about that! The executive summary is: any survey meter with a Geiger-Mueller tube, and a most sensitive scale reading 0.5mr/hour will do just fine. The Victoreen CD V700 is a good example, as is the PDR27/R/S/T meter. Visually, the type of meter you want will have a hand held probe that...

You're welcome, but I didn't necessarily put the description there for you. It was more to give the idea of gamma energy in as simple a way as I could. Ok, now I understand what you are getting at: The fire analogy is showing the parallel between an atomic bomb blast and a fire. There is a...

If his ashes/fire analogy is correct, it is lost on me. Gamma is just light... photons. Photon energy is proportional to the frequency (color, if you will) of that light (E = hn). In the photon spectrum, radio waves are about the lowest energy, microwaves, next. IR is higher, then comes...

CD meters is where this thread began, so did you really have any doubt that I was talking about CD meters? DH was looking for a device to measure the radiation from gages and other devices that he might encounter on MV's. He had located a bunch of CD meters, and was wondering if they would do...

Hi Carl, Animated is one of my goals ;-) I like to keep things interesting. $60 is a great price for a Victoreen 700 counter. If I could have found one for that price there would be some in my collection. But as it is, I have been concentrating on mostly OD and battleship gray counters...

Hi Carl, In the course of the time I have been here on SS, only two people have really ticked me off. You are definitely not one of them. If my posts are being perceived as angry, I will have to continue to work on my tone, as I am very very rarely angry about anything. I started my...

Sort of, but not really... Gamma radiation is gamma radiation. It's the quantity that kills you, not the source. The difference between a G-M tube survey meter, and a hand held ionization chamber survey meter is one of magnitude. I don't really want to get into the physics of the devices...

Carl, By definition, CD stuff is made for after the big one. As I said in my post, there are some sensitive CD meters available, but they are rare. I have been collecting geiger-counters, dosimeters, and other radiation survey junk since I was a lad, and I have had to wade through dozens...

Well, since we like military stuff, you should be looking for a PDR-27. The suffix letter is important, though. The PDR-27, 27/A, and 27/B use obsolete batteries. The PDR-27/C is a modified PDR-27/A with an upgraded power supply that uses 6 D cells... still pretty old stuff. I use PDR-27/P...