Anyone ever see a small generator that fits on the top of a Dietz lantern that generates enough power for a small radio?
The generator has a series of small fins on the top. Whe the lantern heats up, the fins vibrate and produce electricty.
Enough electricity is generated to power a small radio?
Does this really work? Anyone know where they can be found?
Not sure why you're posting this in the GD forum instead of the Survival forum, but anyway...
I believe you're thinking of a thermoelectric pile that uses difference in junction temperature between two dissimilar metals to generate small amounts of electricity. Essentially, a "pile" consists of dozens (or even hundreds) of these junctions connected in series, with half of the junctions mounted in cool air (on the finned side) and half inside the flame. The greater the difference in temperature between the two sides, the more current is produced.
I'm not aware of anyone who currently makes a commercially-made version for powering radios from a lantern (although there was a version that used to be quite popular in Russia 40 or so years ago). You might try Googling for "Peltier Junctions" or "thermoelectric piles".
Response I got by email from Deitz
"The Liberty Power Generator, (LPG) used a thermal battery (thermocouple
device,) to produce electricity from the heat from a lantern, and had no
moving parts. (the fins were only a heat sink, and didn't move.) It could
power just about any 3 volt am-fm-weather band radio for as long as the
lantern was lit, and worked very well. The LPG was produced by GW
Industries, which ceased production about a year ago when they were looking
for a buyer for the LPG division. Since then the product line has been
scraped, and there is no plan to revive it. You may find an LPG on e-bay
every once in awhile, but as far as ordering new ones the answer is nay."
Build your own with components from www.tetech.com ???