The autor say tp = low pass filter to reduce noise. It can be experimentally eliminated. Kh is the headphone output. The interesting thing is I had the SV500...
yes good. Can you show circuit of TP? One friend showed me his setup long ago, it also used a universal counter, so naturally I had to buy one! Never had a...
This is the page from Miguel highlight. http://www.chetan.homepage.t-online.de/sonstig/sv500.htm In another page there is the connection of a gm tube directly...
What about the normal coffee???? If it is only the instant coffee the contamination could be in the process or some add-on Is it? ... From: oe8uww To:...
Betcha somewhere in the ingredients list is something with potassium. In a message dated 11/7/2009 3:06:02 P.M. Central Standard Time, torre.wtc@......
On this day in 1895, while playing with a Crookes tube, Wilhelm Conrad Rontgen accidentally produced and detected radiation in the range of 10 - 0.01...
the tubes above sold as "count tube" they probably are stabilizer tubes ( equivalent to zener solid state). Nothing to do with GM tubes. 475 volt is the...
Potassium/Kalium has a low percentage of a radioactive isotope. You can see that the radiation is twice or three times as high as backgroundnoise but that...
... In the early days there were referred to as Cathode Rays. It is also interesting that Roentgen did not suffer ill effects from X-Ray experiments because he...
I could find twice or more background on clearly natural emitting stones. If this is quite natural it is not in the instant coffee. I don't think this is a...
Excellent Video. I have never thought to test coffee before however I do not drink instant, not enough caffiene! Chris Cavanaugh cav427@... Yukon, OK ... ...
We ran HPGe gamma spectroscopy on a Twinkie once and to our surprise found absolutely nothing in it including potassium-40 I guess this doesn't surprise the...
His first human radiograph was of his wife Bertha's hand and it required 25 minutes of exposure. Douglas K Benn To: GeigerCounterEnthusiasts@yahoogroups.com ...
Hello to everybody. I'm quite new in the world of ionizing radiations, and I recently bought a russian RKSB 104 geiger counter. I found the english manual...
I connected my piezo just in the output of the first cmos after the detection. Unfortunately it is in the lower pcb so you hve to dismount. The sound is not so...
To be clear: The reading is showing 1.4 mR in the fast reading.(1407 uR). If I 'd use the x0.001 position it would go out of scale the display show 1407 I...
Today I had a row test. As I learned tht some girl like it , I decided not to waste time in buing flowers. I connected 4 tubes SBM 20 direct to the SV500...
Potassium is about 1% K40, other interesting foods are not very interesting as they are much lower than this the highest radioactivity can be found in Brazil...
Miguel, Your 4093 Circuit worked very well for me. It is very consistent and reliable when using a LND719 beta/gamma G/M tube at 900V. I used a 50 pF...
Hello Mike! Nice to see the circuit works for you. I think it is a good interface between a geiger tube and the digital world that suits almost any need. Thank...
Greetings All, I am offering two PM1702M scintillators for sale at $390 each to this group. Each is like new, in factory box, three months old, gently used...
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