On Mon, 10 Dec 2018 18:48:55 -0000, Tim J wrote:



"Tim Streater" wrote in message
.. .
In article , Bruce Farquhar
wrote:

On Mon, 10 Dec 2018 09:22:20 -0000, Tim Streater

wrote:

In article , Bruce Farquhar
wrote:

On Sun, 09 Dec 2018 21:40:03 -0000, Rod Speed
wrote:

Bruce Farquhar wrote

A thermocouple produces enough to power a spacecraft?!?

It isnt a single thermocouple, it's a thermopile.
https://en.wikipedia.org/wiki/Thermopile
https://en.wikipedia.org/wiki/Nuclear_power_in_space

Or just for some small electronics?

Not small at all.

Why are these not used on earth?

Probably not that cheap, once you've made the Pu-238.

Whatever happened to those AA nuclear batteries? I assume
they worked the same.

What on earth are you talking about?

https://en.wikipedia.org/wiki/Atomic_battery

Not wanting to read the entire article, apart from space are we using any now?

And eeek! Pacemakers! Don't think I like that idea.