Hi Group,

Johan wrote:

My signal was "armchair copy" at 100km with only 4 watts of output power.

What effect does the LF RF have on the water ?

Well,  there are some products on the market, which claim to reduce
lime-scale in pipes by applying an RF field (or sometimes just a magnetic
field) to the incoming cold water pipe. (And often cause widespread RFI to
the HF band). I THINK they are supposed to work by changing the way the
crystals of calcium carbonate form ... but I am dubious about their
efficacy.

I know of one HFer near here who uses a deep well as part of his ground
system and that works well for him, so I wish you well with your deep-dipole
antenna experiment.

73
Hugh M0WYE