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. 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/d6e680f6-4cd1-42d5-8fa7-2cec7df2e78dn%40googlegroups.com.
