Wouldn't it be easier to get something like a 6 volt zener and put a resistor in series with it  so that the voltage drop turns out to be 100 volts overall? ...
Hi all, what do you think about the AUSTRONIC PORTABLE GEIGER COUNTER METER ebay: http://tinyurl.com/4endle I am a mineral collector: will the Austronic work...
Hi, I did a Google search and came up with nothing. The listing on Ebay leaves a lot to be desired. If you want a bit of free advice feel free to email me...
I would advise against it. The Austronic ratemeter is a relic of the Maralinga period of Australian history, and so will lack the sensitivity needed for...
http://www.qsl.net/k0ff/Road%20Rad%20Finds/In%20TN/ Road Rad find yesterday in Tennessee. I was not only able to get readings from the load, but for the first...
hat little truck is from Associated Couriers: http://www.acistl.com/index.htm Geo ... From: Geo>K0FF To: @NONE> Sent: Thursday, October 02, 2008 8:21 AM ...
I'm running into problems polishing a 3x3 plastic scintillator. BC-400 I think. Seeing what looks like tiny cracks forming after polishing. I'm using a very...
do you happen to have a polariscope to analyze the stress immediately after polishing? It might be stress, or it might even be chemically induced. I would...
I don't have a polariscope. Can you recommend something? I have used this same compound before and on this same slug of plastic. Don't remember having this...
maybe try jeweler's rouge in water? A polariscope can be easily made with two photographic polarizes ( linear type, not circular). Let's assume there is no...
Here is some information on novus polish products. It seems to be water washable. It doesn't smell like it uses solvents but... I've had really good results...
just to mention that I have had no problems with Novus either. geo ... From: radios1236 To: GeigerCounterEnthusiasts@yahoogroups.com Sent: Thursday, October...
... From: Geo>K0FF To: GeigerCounterEnthusiasts@yahoogroups.com Sent: Thursday, October 02, 2008 9:12 AM Subject: Re: [GeigerCounterEnthusiasts] Oak Ridge...
Analysis of the gamma scan-in-motion leads me to believe there was a lot of Co-57 in this truck, as well as a lesser amount of an as yet unidentified...
OK the unidentified isotope now appears to be Mo-99, which is used in Tc-99m generators ( cows) in hospitals. Geo ... From: Geo>K0FF Sent: Friday, October 03,...
I am NEVER going to leave the house again without a rad monitor. On the way to kayaking, a truck went by that set off my pm1701 to the 60-70 range. I caught...
I sent off for a StaticMaster Polonium brush, it came today. No noticeable reaction from the pm1701, or my Aware Rm-70. The LENi with the pancake probe...
does it have a cartridge in it? If so what is the date? These should drive the pancake nuts. Don't forget the range is less than a few inches. Geo ... From:...
... It should definately light up an alpha-sensitive GM pancake if it's close enough. I don't think you will see any response from a gamma-ray scintillation ...
... Sounds pretty hot, wow. Co-60 and Ir-192 in radiographic cameras, presumably. I wonder what sort of transportation index they have, even on the shielded ...
I got the 1" brush, and the active (supposedly..) element is just a little strip of gold foil. the "replace by" date is Feb. 2010. So it should be active. I...
... Perhaps your pancake has got a thick window that is not suitable for detecting alpha. Unfortunately, it's not unheard of. The electroscope idea sounds...
Will be adding some basic gear to the full time mobile rad lab, and extending the optional equipment available for extended runs and special field trips. ...
Geo, I liked the post today on the new stuff for the mobile lab! I have found a few "moving targets" vans with placards, dump trucks coming from Oak Ridge, ...
Has anybody ever tried extraction or concentration of Th-232 from Coleman mantles? I was thinking of , perhaps, steeping several unburned mantles in water to ...
... Hi Luke, I read "The Radioactive Boy Scout," about a boy who took a blowtorch to a few hundred mantles, wrapped the ash in aluminum foil and built his own...
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