Please show us some pictures of the tubes! Il giorno sabato 31 ottobre 2020 alle 15:39:36 UTC+1 SWISSNIXIE - Jonathan F. ha scritto:
> I'm also owing a few radioactive tube, specifically purchased because they > are! ;) > Don't worry about Co-60 and Kr-85 most of them had very few amounts of > isotopes in them, and most of them are long gone. For example the 346C > Tube nick mentioned, had 4.5uCi of Kr-85 in them when manufactured, this > would, if new (manufactured today), be inside a shipping restriction > indeed. You can only ship 0.27uCi Kr-85 international. But since Kr-85 has > a half life of around 11years most of it will be gone today if the tubes > are old. There are also some nixies with Kr-85, but these had lower amounts > in them. Sure there are some "Bad-Boys" out there that still contain > significant amounts of isotopes even if they are old. For example usually > spark-gap tubes. For example there are some 0B2WA Regulator tubes that have > 6uCi of Ra-226. Even if they are around 50 years old, the amount has not > dropped significally, since Ra-226 has 1600years of half-life. Technically, > they would also be forbidden to ship without proper declaration. But > usually everything gets trough just fine, i have purchased a few of them > > Also there is nothing to worry about the tubes as long as they are intact > and do not break. Actually a very save way to collect radioactive items. > Rocks for example are more "dangerous" since small bits and powder can come > off. > > If someone interested i can show pictures a few tubes ;) > > > > [email protected] schrieb am Dienstag, 27. Oktober 2020 um 16:43:46 > UTC+1: > >> " 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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