See below. Seems to me like a few layers of aluminum foil would have done the job? Also, I wonder what was in the seeds? I-125 has a 60 day half life and...
I have aquired a number of radium coated dials from WW2 military aircraft gauges. Because ebay is banning their sale I am going to offer them off line. If you...
I have recently learned that in the past some of these detectors were made with 130 µCi activities instead of the now usual 1µCi. Has anyone come across...
Hi Everyone and especially the folks across the pond as I need your help. I recently bought a 107c which I believe I can convert the unit from operating on old...
Heres a nice collection of pictures and schematics for old geiger counters: http://www.dvq.com/misc/html/misc.htm ... Hi Everyone and especially the folks...
... I keep seeing references to posts in FILES on page 3 but when I look for them I find page 2 (no referenced files), a link to page 1, and no access to page...
http://groups.yahoo.com/group/GCEpage3/ Page 3 is where we are all headed some day soon, as we are running out of memory space here. Geo ... From: Robert W...
... Someone at work once recommended http://www.houseofbatteries.com/ for custom batteries. I haven't dealt with them and most readers might prefer to make...
Does anyone know when you CPM calibrate a Bicron Surveyor M what or how does the LCD scaler get calibrated my Bicron has the Factory scaler option instaled on...
No calibration for the scaler, it is intrisically accurate by design. Do you have the basic instrument calibrated OK? Manual button gives 1 pulse per push, for...
No I havent tried to calibrate it yet may tonight ill try it out, I might hook it up to my RM-19 first to see if the cpm from the pulser is close it still has...
Just a reminder to all that in the USA it is highly illegal to remove a pellet from a smoke detector, and the NRC takes it very seriously. Been there, done...
Yeah, industrial ones I have come across, the Am241 is formed into long strips with gold plating on one side. Activity was something around 75-90 uCi per ...
Wow that's a nice resource!! ... Best Regards, Chuck Abraham (Majnun Karraz) Third Stone 4321 Modoc Rd. Santa Barbara, CA 93110 805 259 5414 God Opens Doors...
I am fairly new to geiger counters, so I thought I would get an opinion on a decay graph I made over the past 18 hours. I did a wipe of my TV screen, and put...
Very nice job Ian. Yes you are only seeing the daughters of radon. Keep the sample, test it again in 6 months. By then new daughters will have grown in and you...
... Just a reminder that your typical GM tube is more sensitive to soft gammas than to its typically calibrated Cs-137 emissions. A good thing for folks...
What type of instrument are you using and what part of the country are you in? 40 CPM seams a little high, unless you are using a pancake probe or a large...
... are you in? 40 CPM seams a little high, unless you are using a pancake probe or a large traditional GM tube. It's a pancake probe from an SE Inspector....
... You'll always get some counts due to cosmic rays. While the ideal shield would be layers of metals (lead on the outside, working down to aluminum on the...
Use books with big words.Geo ... From: Chris Smolinski To: GeigerCounterEnthusiasts@yahoogroups.com Sent: Tuesday, December 06, 2005 10:46 AM Subject:...
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