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Messages 6440 - 6496 of 17469   Oldest  |  < Older  |  Newer >  |  Newest
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6440
Quick! Cover that crystal with something opaque. It's not as sensitive as photo film, but if you leave it exposed to light for a while, it will yellow and...
wpmoore3rd
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Jul 1, 2006
4:18 pm
6442
whoa ... i seem to have stumbled into The Right Group! My PRI 107C was the first thing I ever bought from an ad -- probably Popular Mechanics or Science...
jameskpolka
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Jul 2, 2006
5:25 pm
6443
Hi James, The usual solution these days is to build a small switching power supply that runs off of 4.5 to 6V to supply the 45 and 67 volts required by the...
Craig
siliconhillb...
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Jul 2, 2006
7:17 pm
6444
Here is the web address I was thinking of. I didn't get a response to the battery substitution site. Might not be in business any more. ...
Craig
siliconhillb...
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Jul 2, 2006
7:36 pm
6445
It's good you found the link to Al's webpage. He makes the power supply modules that eliminate the need for the special batteries. Getting a proven circuit...
GEOelectronics
K0FF
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Jul 2, 2006
8:41 pm
6446
Now that the hot weather is here, it's time to change the probes in your vehicular radiation detector setups. Remove any thin window ( pancake, end-window)...
GEOelectronics
K0FF
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Jul 2, 2006
9:04 pm
6466
... I have finally gotten around to reading these "American Heritage® Book of English Usage" paragraphs and wish to point out they use poor, i.e. ... Remember...
J. Marshall Reber
groschen1936
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Jul 7, 2006
3:50 pm
6469
For the mere enjoyment of electrocuting insects, I can offer my unsolicited testimonial. Big moths put on the best and noisiest show. Get ready to be truly...
Robert Merkin
jameskpolka
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Jul 9, 2006
2:09 am
6471
It's an ion chamber on a stick. They use them to probe 'phantoms" to see how much radiation is getting to the target area. Geo ... From: Tornadojoe To:...
GEOelectronics
K0FF
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Jul 9, 2006
2:58 pm
6472
Years ago, when I was in graduate school, I transistorized a PRI 107C and a PRI 111B. I made a printed circuit board that was the same size as the original...
Lenox Carruth
ww_ii_collector
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Jul 9, 2006
5:34 pm
6473
Does anyone have schematics on the Minimonitor II or 125 pocket GCs? Anything on the XETEX 415 dosimeter? Thanks in advance.... Bill Beamon KD4FNC bbeamon -at-...
Bill Beamon
kd4fnc
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Jul 9, 2006
6:15 pm
6475
Ken, Sounds like a bargain. Do you have a PayPal account? If so, I'll take it now, if not I'll still take it but will have to clear it with my better half. ...
troglodite@...
injuneer314159
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Jul 10, 2006
6:42 pm
6478
Anybody know which Gamma tracer isotope hospitals use to track white blood cells?...
wharpt@...
wharpt1
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Jul 11, 2006
12:49 am
6479
I don't know if this is what you are talking about but hospitals use I-131 for therapy when they tag white blood cells with I-131. It is called Monoclonal ...
coketaylor@...
sciradioactive
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Jul 11, 2006
1:44 pm
6480
Does the speaker on the Ludlums have any special Circuit driving it? for what it is,It sure is loud....
Tornadojoe
tornadojoe1974
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Jul 11, 2006
10:05 pm
6481
In a message dated 7/11/06 8:44:41 AM Central Daylight Time, coketaylor@... writes: I don't know if this is what you are talking about but hospitals use...
wharpt@...
wharpt1
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Jul 12, 2006
4:15 am
6482
Hi, Nearly all the Ludlum handheld units use a "Unimorph" piezo-ceramic sounder. Generally (e.g. models 12 and 16) driven by a '555 timer wired as a pulse...
Robert Atkinson
robert8rpi
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Jul 12, 2006
12:40 pm
6483
I-131 is a strong Gamma emitter, with over 81% probability of a 364 keV gamma per disintegration. Radiological half life is 8 days. The biological half life...
GEOelectronics
K0FF
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Jul 12, 2006
3:37 pm
6485
Geo, with all due respect, ain't NO way! I'm gonna collect a urine sample! Thanks anyway! Wharpt ... From: GEOelectronics@... To:...
wharpt@...
wharpt1
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Jul 12, 2006
4:13 pm
6486
And you call yourself a scientist!? Geo ... From: wharpt@... To: GeigerCounterEnthusiasts@yahoogroups.com Sent: Wednesday, July 12, 2006 11:03 AM Subject:...
GEOelectronics
K0FF
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Jul 12, 2006
4:56 pm
6487
Then you don't want to know how doctors in the 18th century checked for sugar in urine. ;-) ... -- ... Chris Smolinski Black Cat Systems ...
Chris Smolinski
lastoneouttu...
Offline Send Email
Jul 12, 2006
5:17 pm
6488
That's nothin'. In India there is a whole cult that drinks all their urine, all the time (Urophagia). No kidding Ghandi was one of the practitioners so was...
GEOelectronics
K0FF
Offline Send Email
Jul 12, 2006
5:53 pm
6489
No. In a message dated 7/12/06 11:58:36 AM Central Daylight Time, GEOelectronics@... writes: And you call yourself a scientist!? Geo ... From:...
wharpt@...
wharpt1
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Jul 13, 2006
12:07 am
6490
After today I'll be taking a break from the eBay scene long enough to get the Home Lab reorganized. If anyone has an open order for LENi's, GEO-210 probes or...
GEOelectronics
K0FF
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Jul 13, 2006
12:16 am
6491
me neither, just a wannabee. Geo ... From: wharpt@... To: GeigerCounterEnthusiasts@yahoogroups.com Sent: Wednesday, July 12, 2006 6:52 PM Subject: Re:...
GEOelectronics
K0FF
Offline Send Email
Jul 13, 2006
12:32 am
6492
I am researching Geiger Counters, GM tubes and scintillators for prospecting hot rocks and ran across this posting by Franklin Roberts <...
Duane Goff
opointe
Online Now Send Email
Jul 13, 2006
3:55 pm
6493
Yes, the Ludlum 2241 series, FWT-Cypher5000 and Eberline 600 also have audio divide, but a better way to run mobile is with an alarming meter, run off the...
GEOelectronics
K0FF
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Jul 13, 2006
5:11 pm
6494
The HOME LAB series by George Dowell Chapter 1 Hardware The Home Rad Lab - The Nuclear Physics Wing Intro Radioactivity in the educational lab. What is legal? ...
GEOelectronics
K0FF
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Jul 13, 2006
5:38 pm
6495
Thanks Geo for the info and all you do! ... divide, but a better way to run mobile is with an alarming meter, run off the battery. See the FILES section for...
Duane Goff
opointe
Online Now Send Email
Jul 13, 2006
5:40 pm
6496
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=250005338686&fromMakeTrac k=true Nope, I'm not the buyer or seller. Steve Jones...
Steve Jones
cornbread_fred
Offline Send Email
Jul 13, 2006
9:27 pm
Messages 6440 - 6496 of 17469   Oldest  |  < Older  |  Newer >  |  Newest
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