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Messages 128 - 168 of 206   Oldest  |  < Older  |  Newer >  |  Newest
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128
Added to the file, a rather nice radioactive (shows Ra-226 daughters) Trilobite fossil that I collected in Morocco on 1994/1995 field trip. ...
Geo>K0FF
k0ff
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Oct 14, 2007
3:22 pm
130
Subject: For Sale CDV-715 Geiger Counter. WORKS- Passes CIRCUIT CHECK!! THIS IS A CDV-715 Geiger Counter ...
Geo>K0FF
k0ff
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Oct 17, 2007
5:47 pm
132
A brief list can be found here: http://tubecollector.org/documents/radioactive.htm Not all tubes are still radioactive now, if they have short lived isotopes. ...
Steve Schoner
steve_schoner
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Oct 26, 2007
6:48 pm
134
Hi, Dug out my 20 year old self luminous exit sign and found it still luminescent and fully quiet - no counts of any kind. It's a totally sealed unit, appears...
Bill Coon
kc8lrm
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Nov 12, 2007
10:38 pm
135
For the Home Lab: http://www.telatomic.com/telxo1.html Some of the experiments possible with this are: X-Ray diffraction Bragg reflection Spark Gap Rectilinear...
Geo>K0FF
k0ff
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Nov 27, 2007
10:11 pm
136
Testing for lead in paint and other products using radiation. There is a lot of squawking going on concerning China imports containing lead in paint,...
Geo>K0FF
k0ff
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Nov 28, 2007
1:42 am
137
Geo: Yes, it is not a good idea to take apart smoke Detectors, a recent site suggested using the source for a homemade Spinthariscope - since it is an Alpha...
John Richards
cyclojohn
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Dec 21, 2007
2:18 am
138
Natural Thorium 232 is abundant in the environment. As an industrial material thorium has been used to enhance a great number of products. Because all thorium...
Geo>K0FF
k0ff
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Dec 24, 2007
6:07 pm
139
Scintillator PREAMP- Make ANY Geiger a SCINTILLOMETER 350010924496 Pictures on there now. Schematics in FILES for home construction project. Also more info at:...
Geo>K0FF
k0ff
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Dec 29, 2007
10:55 pm
140
Please refer to the decay chain for U-238 on page 2 of this chart, if you do not have one printed already: ...
Geo>K0FF
k0ff
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Jan 5, 2008
3:39 pm
141
If the check spot contains only "Radium D+E" i.e. Pb-210 or radiolead, it has a half life of 22 years so the readings will be less over time. It is predictable...
Geo>K0FF
k0ff
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Jan 5, 2008
3:57 pm
142
Hello, I have some Dosimeters that can be seen in the group's photos section at; http://tech.ph.groups.yahoo.com/group/HomeRadLab/photos/view/6a9c?b=1 I have...
Keith Watt RN
keith_wattuk
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Jan 5, 2008
4:31 pm
143
Detecting DU at a distance via beta particle emission. DU (Depleted Uranium) is uranium with the majority of the U-235 removed, leaving behind U-238 and U-234....
Geo>K0FF
k0ff
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Jan 7, 2008
5:12 pm
144
When rock collecting in Missouri turns from rock picks to ice picks, we search for easier prospecting grounds. This January it was Puerto Vallarta, Jalisco,...
Geo>K0FF
k0ff
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Jan 20, 2008
7:33 pm
145
Hello, Geo pointed me to this Yahoo group and mentioned there was some previous work done on granite by this group. I looked in the Files section but did not...
carpentershop
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Feb 18, 2008
12:28 am
146
... From: GEOelectronics@... To: GeigerCounterEnthusiasts@yahoogroups.com Sent: 18 February, 2008 12:06 PM Subject: Re: [GeigerCounterEnthusiasts]...
Don Jordan
dkjordan2001
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Feb 22, 2008
1:54 am
147
Greetings group, my name is Kevin, I have had an interest in mineralogy for some time, and have found an old friend I used to toke around with me years ago. ...
Kevin
vk3ukf
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Mar 14, 2008
12:59 pm
149
Nuclear Fission in the Home Radiation Lab SF, Spontaneous Fission is a form of radioactive decay that is possible in very heavy atoms. Theoretically it can...
Geo>K0FF
k0ff
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Mar 26, 2008
11:33 pm
150
http://rustam.uwp.edu/306/306book.pdf...
Geo>K0FF
k0ff
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Apr 8, 2008
3:30 pm
157
... From: Geo>K0FF To: RADONPROFESSIONALS@... Sent: Friday, April 18, 2008 12:18 PM Subject: Midwest Earthquake-NORM radiation changes? It would be...
Geo>K0FF
k0ff
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Apr 18, 2008
5:58 pm
158
NORM maps of interest http://energy.cr.usgs.gov/radon/DDS-9.html http://energy.cr.usgs.gov/radon/radonhome.html http://energy.cr.usgs.gov/radon/rnus.html ...
Geo>K0FF
k0ff
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Apr 25, 2008
4:08 pm
159
http://www.qsl.net/k0ff/ScintiLENi/ Finally, after all these years, one box has all the hacks in one place for the first time. Everything in this LENi was laid...
Geo>K0FF
k0ff
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Apr 27, 2008
6:58 pm
160
Shine a small LED flashlight into the charger port of your CDV pen dosimeter and point the other end towards a wall or piece of white paper. The dosimeter...
Geo>K0FF
k0ff
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May 1, 2008
2:45 pm
161
Spectrum Techniques ST-350 is a self contained Geiger Muller Scaler-Counter Lab. A built in digital counter, Ratemeter, Variable High Voltage Power Supply,...
Geo>K0FF
k0ff
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May 9, 2008
8:06 pm
162
Q: Take 3 imaginary isotopes. #1 has a peak at 100 keV only, # 2 has a peak at 662 keV only and #3 has a single peak at 3 MeV. Each sample has the same number...
Geo>K0FF
k0ff
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May 22, 2008
12:51 am
163
Hello Folks! This is an explanation of how nuclear decay happens, and where the alpha, beta and gammas we all love to measure come from. For all intents and...
jasonburry
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May 30, 2008
7:08 pm
165
Q+A goes here: http://tech.groups.yahoo.com/group/GeigerCounterEnthusiasts...
Geo>K0FF
k0ff
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Jul 4, 2008
5:32 pm
166
CDV 700 specific Q+A goes here: http://tech.groups.yahoo.com/group/CDV700CLUB/...
Geo>K0FF
k0ff
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Jul 4, 2008
5:35 pm
167
Radiation Detection Probes and Their Dial Scales> A Tutorial by Geo Pay attention to the Gamma Sensitivity numbers in the specification sheets and charts. This...
Geo>K0FF
k0ff
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Jul 5, 2008
1:52 am
168
Calibrating a Survey Meter> A Tutorial by Geo STEP 1: Check the instrument and probe for contamination. a frisker (pancake probe) should be used so that all...
Geo>K0FF
k0ff
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Jul 5, 2008
6:04 pm
Messages 128 - 168 of 206   Oldest  |  < Older  |  Newer >  |  Newest
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