Since I can't own my own I -131 source> it has an 8 day half-life, a reasonable substitute is Ba-133. They have very similar energy levels. Now any equipment...
Anyone have, or know of an available crystal for a PRI 117B scintillator that I can purchase or trade? It should be 1" x 1/2". I have two crystals at the...
Most probes that are made to detect Gamma have some sort of specification as to their performance in response to C0-60 or Cs-137, the two most widely used...
Geo...this is probably the most stupid question you will probably ever be asked, but I will anyway... Is there any other way to build or test or calibrate this...
Dave, actually quite a lot IS done without radiation. The Ludlum Model 500-2 that I use to calibrate the meter units is sort of a signal generator. It...
There are other aspects to "calibration" that George hasn't touched upon which sometimes confuse the beginner: One is the statistical imprecision due to the...
Here's one that's a little odd. A CDV 700 came in for minor modifications. The owner wants a BNC connector on it, and had recently had it calibrated at KI4U (...
Geo...is anyone still manufacturing the 6993 tube as replacements for collectors such as myself? Or and exact facimile? You bring up a good point here, this...
Yes Dave, many more meters have survived than probes, that's for sure. The new version, direct replacement tube is the LND 720. I've had a few of them on the...
www.etsu.edu/ospa/rso/sessions/Three.ppt The above link explains how the distance Betas travel in air is about 12 feet per MeV of energy. There are some good...
2.54 cm = 1 inch. 30.4 cm = 1 foot. 2.83E4 cc = 1cubic foot. The atom is the smallest part of an element that can be separated by chemical reaction. Atomic...
Saved this one for sure to the hard drive along with the other posts....great ref info.....! ... element. ... exposure. ... (ev), ... diameter ... size. ... ...
... such as ... Has anyone tried using 1% or better resistors, and if precision caps aren't available, a large number of caps summing to the desired values?...
... Not to stomp on Geo's spinthariscope biz, or the other competitor who showed up on eBay, but I've seen the phenomenon using a barely-visible Ra clock hand...
... <jmarkitell@i...> wrote: . A drop from 6 ft is no problem...no cheap ... Do you realize how ironic this is? Geo has posted about how you need super-thin...
A spintharicope is very convenient. United Nuclear, who sells a version without a source, and one with a source, has some nice spinthariscopes. I would rather...
... The interesting thing (to me) was its different from "quantum mottle", ie speckle noise, or point noise, sometimes seen in night vision scopes (eg on CNN...
I read a book on the research done with chemoluminescence. The biologists and chemists studing it offered a bounty of 5 cents per firefly. The results, they...
The ENi uses a thick-film preceision set of resistors in a special network that eliminates this problem, also good caps in that portion of the circuit. That's...
... know ... Never meant this to become a biz, that's for sure. Things sort of got out of hand this summer, but looks like we can see the light at the end of...
Hi, I've just aquired one of the UK versions of the AN/PDR-75 Dosimeter reader complete with calibration kit and some DT-236 Dosimeters. Does anyone on the...
I finished my voltage divider tonight. I took resistors totaling 90 meg and put them in a nice little box. I put binding posts on one end and a type "C"...
The details of using your voltage divider are slightly unclear. How do you obtain the maximum voltages from the working counter? Does it have an adjustable...
... How do ... have ... the ... steeper ... Sorry for the unclear post. The only thing unusual about my voltage divider was the two pairs of input connectors....
Does anyone have a manual for the E 520 that they could e-mail or fax? I can't find one even through Eberline since it was discontinued in 97'. Your help is...
Most ion-chamber instruments are open to the air, and are high range. Another class of instrument uses pressurized chambers and is much more sensitive. All...
Geo, by "most" I'm assuming the 715, 717, 720's, etc fall into this category.... When one of the chambers "rattle", is there any recourse to repair them, and...
Yes, that's correct. Also Eberline, Victoreen etc. hand held ray-gun units called CUTIE_PIE's. Only pressurized ones I've seen so far are the Victoreen 440 and...
Having problems with message search?
Fill out this form to ensure your group is one of the first to be migrated to the new message search system.
