Hi all, Thanks to"csh" who posted a link to some nice information on GM counters. I looked at his GM pluse generator circuit, and it was fairly similar to one...
Hi Colin, The unwanted positive pulse is caused by the forward voltage of the diodes. In my design I used a shottky diode (BAT85) to reduce this problem. Your...
Hi all in the USA, Just spotted this indicator on eBay.com, 280212231647 It appears to be identical to some that I bought a couple of years ago. They are very...
... LOL, yes, she sure was!! Mrs. Williams, I'll never forget her and her twisted 6" long fingernails. She had us do a number of orative reports (mine were...
Hi, It indicates turn rate and apparent bank (where the vector of gravity and centifugal force is acting relitive to aircraft vertical axis, also known as...
Another one, 330224228497 This is the same part number as the one's I have but I can't tell from the photo if it's Ra226 luminised. Robert G8RPI. ... ago. ... ...
Advanced Photonics Inc produces avalanche photodiodes by the following method: "Instead of doping the silicon to produce an n-type layer in the conventional...
... Hi Kevin, Wacker was advertising that stuff, let's see, more than 30 years ago. Never bought any and don't know what they ever did with the process. Not...
... Probably more expensive, since you need to start with ultra-high purity Silicon, to avoid unwanted activation byproducts, and you need access to an...
Just received a nice self-luminous EXIT sign today. Quite the nice purchase for $15. Has a very nice light green glow that should last until OCT 2014, ...
I don't think I would advertise such an acquisition, but maybe I am just paranoid...cool find! ... -- Nick A "You know what I wish? I wish that all the scum of...
I was doing some research for a customer and came across some information that may be of interest to the group. The application and related information is...
Hey everybody, I'm looking for a photo of one of the "Pigs" that OCD used to store the CO60 that was issued to Civil Defense trainers. When I was growing up,...
After esgerly awaiting for my counter to come back for repairs I had it on today listening to the background clicks. A thunderstorm rolled in here in the Ft...
Lightning can generate some x-rays, according to some sources. http://news.ufl.edu/2003/01/30/lightxray/ There are also some who have hypothesied that...
Lightning also generates a powerful EMP. If the strike is close enough, and your counter case is not sufficiently shielded, the sensitive detection circuitry...
http://www.lightning.ece.ufl.edu/PDF/AGU/2004GL021782.pdf Its xrays. Tracy ... After esgerly awaiting for my counter to come back for repairs I had it on today...
It should be possible to place the detector in a copper screen (Faraday cage) to determine that the readings are indeed from ionizing radiation and not from...
It's called Neutron Transmutation Doping, or NTD. It tends to have a lot of advantages over regular ion implantation and things like that. Adjust the neutron...
X-Rays. Search Bremsstrahlung Radiation. Geiger Counters are also capable of detecting electron streams directly (beta radiation when it comes from a nucleus)....
Probably liquid Nitrogen cooled HPGE but since we don't live in that world, NaI(Tl). Geo ... From: David Speck To: GeigerCounterEnthusiasts@yahoogroups.com ...
The electron is quite energetic and can become part of an electron beam (my thoughts) and ... I just remembered that at the turbine engine overhaul facility in...
The results were pretty interesting as it turned out that the common flour beetle was able to withstand 100,000 rads, which is about 90,000 more rads than I...
Spacecraft orbiting earth have detected gamma-rays associated with lightning. They shoot upwards from the lightning shaft. I think they are called "sprites"...
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