Re: radium luminescent aircraft light design
They are not specifically sealed and will leak tiny amounts of Radon. You can remove the toggle by dismantalling the switch fron the rear. Then seal it in a small bottle or encapsulate it in epoxy resin or clear cast polyester resin (from craft shops) to improve the seal.
--- In CDV700CLUB@yahoogroups.com, "." <revtkatt@...> wrote:
> --- In CDV700CLUB@yahoogroups.com, "Phil" <n5tsx.6@> wrote:
> > I have about 20 of them.
> psycho :-P
> >It appears to be a Radium Impregnated thick paper like material under a glass dome as you suspected.
> Aha. Actually I had no idea of the structure, phosphor/radium
> coated paper would work. So, thanks for the info.
> I imagined a glass tube with dried liquid; blotter
> is easier to QA.
> Cf also trit lights, either gas
> filled /phosphor lined like fluorescent tubes
> or plated with phosphor + trit chems directly, no gas.
> (Only recently learned about the latter, seems safer?
> Or at least easier to make.)
> My eyes are getting old, so I thought I'd ask this list,
> rather than try to non-destructively reverse
> engineer the dot by looking at it through the dome, which
> didn't reveal much when I tried :-)