those old test sources ,especially the black epoxy sealed ones can leaking after this long time, test this by wipe test !
found the other tread:
http://laserpointerforums.com/f57/share-your-radioactive-collection-91197.html
nice item ! was there a beryllium window in it? price is :beer:
i can recommend this geiger kit:
Soldered Mygeiger Dosimeter DIY Geiger Counter Kit w USB and SBM 20 STS 5 Tube | eBay
has dead time compensation and tube settings can changed
i must test this to believe :)
you know a source for this paper?
i only found this:
2? Round ZNS AG Over Thin Film Mylar for Alpha Radiation Detection | eBay
But only very weak because the radioactive particle and the glowing particle must be together as near as possible...thats why the vintage radium paint was milled very very fine ...nowadays in all vintage clocks the paint is burned out from the alpha emission ..even when you hold strong...
Re: Attn: photography buffs; Help requested!
i heard the sony cybershot f828 or f717 are easy to mod the filters inside
even with a magnet only:
https://vimeo.com/107865947