> > Thermal pile ?
>
> There's an idea! <grin>  Perhaps you can find some "loose"
> radioactive strontium or whatever in one of those toy countries
> on the edge of civilized Europe

Australia maybe, uranium all over the place. And A-bomb sites
too. NZ is staunchly nuclear-free, I'm afraid lumps of isotopes
unlikely to be found in the bush that Paul's unit will be in

I was thinking more along the lines of hot ambient air and
cold streams for a temperature differential, although you'd
have to be a little lucky and a little more hopeful than I am to
actually try it

Any chance at all of using the Americium from smoke
detectors to generate small voltages, or is that an "end of
career" experiment ?

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