I need some parts for an Anton model 6. Just recently my detent spring broke for the Beta window. Also, when I opened up the probe to attempt repair the...
Hi, I'm continuing to sell off some of my collection and this particular unit was obtained from K0FF origianlly. It comes complete with Geo's English Manual...
A PRI 107B arrived today. Electronically, it's toast, like they all are, the geiger tube is collapsed, etc etc, but it has a strange check-source attached to...
Justin, Yep, I've seen plenty of PRI sources in that condition. The source is made of two celluloid (nitro-cellulose) disks glued together. The thing was...
Justin, These PRI sources generally are around a microcurie of Radium sandwiched between acrylic plastic disks. Yours appears to have been stored in a very...
Marshall, Your identification of the plastic as acrylic made me curious. Long ago I had identified it as celluloid. I did the "burn-test" on a sample of a...
Hi, I can send you a complete probe (without tube) and the rubber packing that goes over the tube's pins. If the rubber packing in the meter's case-top is...
Historic literature has lead me to believe that the PRI discs are: 106B Uranium or ( carnotite) 107B, 109, 110, 111B, 111C, all radium. I have noted some will ...
I know some people here are a bit sick of dirty bomb hysteria, so I thought there might be some interest in watching it torn to shreds in a documentary series...
... I caught a bit of a book-author lecture on CSPAN. (Ok, maybe I need to get a life :-) where in the author, of a book titled _Fear_, described how the first...
This is fairly unusual, a licenced source disappears in a fire. GENERAL LICENSED RADIOACTIVE MATERIAL LOST DURING BUILDING FIRE During a fire in the licensee...
Hi DH, I checked out the site. Yep, he generated x-rays all right. If you can scrounge a commercial x-ray tube, as he did, you're almost there. His high...
Another thought: Be real cautious about using GM detectors for measuring X-rays. An ion-chamber instrument is much preferred because it is not sensitive to...
Good point, John. Also, if you are using DC to drive the x-ray tube, you can saturate a GM counter and get NO reading. Adding shielding to the tube might get ...
Hi John! ... What do you mean by "rep rate of the HV generator" ? Would that be the output voltage ripple ? If yes, what is the exact effect on GM tubes ? Loss...
... A well designed solid state detector could also sense the continuous DC current produced in high flux environments, and switch over to analog detection (vs...
In Other words, is it not possible to get an accurate geading with a GM Detector on X-Rays? Or is the energy level above what most GM detectors can detect? I...
Chris, Marshall GM counters work just fine at 75keV photon energy. BUT, GMs produce one pulse per detected photon. An x-ray machine can produce milliwatts...
Here's a neat material some of you might be interested in for making custom parts or molds FOR parts for repairs. It's a melts-in-hot-water molding plastic...
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