>AFAIR it had many wire junctions with hot end in and
>cold end out with large radiator fins.

Electronics Australia (under one of it's earlier names that I now cannot
remember) had a reader submission where he powered one of those 9V pocket
transistor radios with a thermopile on a kerosene lantern. Had a little bit
of info in the article about the best wire types to use. Anyone wanting to
try and look in a library will need to be going back into issues from the
1960's, possibly late 50's.

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