[TowerTalk] ground and conductivity

[Tom Rauch]

> I believe that fresh water has very poor conductivity.
Salt water has very
> good conductivity.
>
> Les W2LK


That's correct, but lakes have contaminants that increase
conductivity significantly over pure fresh water.

For example the Great Lakes' conductivity is in the range of
poor to fair soil, or about 8mS/m.  Sea water is 5000 mS/m.

Just plain old dirt ranges from less than 1mS/m up to 30 or
more.

Not that it matters all that much for skywave.