" A scintillator? Wow! That's serious stuff! :)" Haha, you just don't have the addiction going strong (yet). I'm pretty sure I am up over 20 scint probes or parts to make them now, and let's just say quite a few G-M detectors. And the different types of scint detectors. You have plastic, NaI, CsI, CZT, BGO, etc.
On Tue, Oct 27, 2020 at 10:05 AM GastonP <[email protected]> wrote: > The source I use to test my Geiger counters (actually just one, and I > switch the GM tubes) is a plastic bag with 3 NOS gas lamp mantles. They are > quite hot. > I haven't had any luck (or perhaps that was actual luck) trying to detect > natural radioactivity at the places I have access to, so every time I take > my Geiger counter somewhere, I have to take the mantles too just to show > that the counter works. > > > What kind of GM tube is in it? My entry-level scintillator gives me a > background of ~1150CPM at 900V. > A scintillator? Wow! That's serious stuff! :) > > On Tuesday, October 27, 2020 at 11:24:11 AM UTC-3 Robert G. Schaffrath > wrote: > >> Back in the late 1970's, I purchased an old ARC-44 radio that came with a >> warning about Cobalt-60. Seems the 5829/WA and 5787/WA tubes contained >> Cobalt-60. However, with a half life of 5.3 years, the tubes showed no >> activity on a Geiger counter. By the time I got the radio as surplus, three >> half-lives had already passed. >> >> On Monday, October 26, 2020 at 6:53:14 PM UTC-4 Pramanicin wrote: >> >>> I received a box of dekatrons a couple years ago where some of them had >>> radioactive labels on the boxes. Just standard GC10B's, so not sure what >>> the label was warning me of, alas I don't have a geiger counter, but maybe >>> I should get hold of one! >>> >>> On Mon, Oct 26, 2020 at 3:35 PM Paul Andrews <[email protected]> wrote: >>> >>>> Mine is a GK Mini with a SBM20 tube. Background with it is about 20 CPM. >>>> >>>> On Oct 26, 2020, at 6:12 PM, Mac Doktor <[email protected]> wrote: >>>> >>>> >>>> >>>> On Oct 26, 2020, at 5:35 PM, Nick Andrews <[email protected]> wrote: >>>> >>>> Haha, the radium is the one that makes me nervous. Tritium, Kr, etc >>>> not so much! Just watched Radioactive on Amazon (I think) about Marie >>>> Curie. A little slow but not bad. >>>> >>>> >>>> I read somewhere that the Curies would go out to their workshop after >>>> dark and just stand there watching the entire room glow. There were glowing >>>> rings on the shelves where bottles had been sitting at some time in the >>>> past, who knows how long ago. >>>> >>>> >>>> On Oct 26, 2020, at 6:00 PM, Paul Andrews <[email protected]> wrote: >>>> >>>> I have a couple of old alarm clocks with radium dials. My Geiger >>>> counter goes crazy when it’s next to them. >>>> >>>> I also have some Uranium glass glasses and was surprised to get about >>>> 20-30 times background off of them. >>>> >>>> >>>> What kind of GM tube is in it? My entry-level scintillator gives me a >>>> background of ~1150CPM at 900V. >>>> >>>> >>>> My dad had prostate cancer a while back. They implanted something with >>>> a half-life of two or three weeks. I checked him every half-life to confirm >>>> that the count had in fact decreased exactly 50%. 8D >>>> >>>> >>>> Terry Bowman, KA4HJH >>>> "The Mac Doctor" >>>> >>>> Q: Should car stereo speakers be pointed to the rear for more thrust or >>>> up for more traction? >>>> >>>> A. On long trips, the 20- to 30% improvement in gas mileage you might >>>> get with speakers pointing to the rear is certainly worthwhile. On the >>>> other hand, if you drive on snow or ice, the extra traction of >>>> speakers pointing upward gives you added control. >>>> >>>> Don Lancaster >>>> >>>> -- >>>> You received this message because you are subscribed to a topic in the >>>> Google Groups "neonixie-l" group. >>>> To unsubscribe from this topic, visit >>>> https://groups.google.com/d/topic/neonixie-l/BL83MEnFSbA/unsubscribe. >>>> To unsubscribe from this group and all its topics, send an email to >>>> [email protected]. >>>> To view this discussion on the web, visit >>>> https://groups.google.com/d/msgid/neonixie-l/A1A1E624-DE2B-4946-942D-58D48D37EA53%40gmail.com >>>> <https://groups.google.com/d/msgid/neonixie-l/A1A1E624-DE2B-4946-942D-58D48D37EA53%40gmail.com?utm_medium=email&utm_source=footer> >>>> . >>>> >>>> -- >>>> >>> You received this message because you are subscribed to the Google >>>> Groups "neonixie-l" group. >>>> >>> To unsubscribe from this group and stop receiving emails from it, send >>>> an email to [email protected]. >>>> To view this discussion on the web, visit >>>> https://groups.google.com/d/msgid/neonixie-l/9269EE17-C181-47C9-BAED-EFEAE9ACAA5F%40gmail.com >>>> <https://groups.google.com/d/msgid/neonixie-l/9269EE17-C181-47C9-BAED-EFEAE9ACAA5F%40gmail.com?utm_medium=email&utm_source=footer> >>>> . >>>> >>> -- > You received this message because you are subscribed to the Google Groups > "neonixie-l" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To view this discussion on the web, visit > https://groups.google.com/d/msgid/neonixie-l/42cfeedf-c14a-404c-8280-d137259b0072n%40googlegroups.com > <https://groups.google.com/d/msgid/neonixie-l/42cfeedf-c14a-404c-8280-d137259b0072n%40googlegroups.com?utm_medium=email&utm_source=footer> > . > -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. 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