Ground probes = more effective
JP,
In the reports I've read from the Amatuer Op's in Europe operating at 73K.C.'s, a ground rod as short as 18" seems to work out well and you can resonate and impedance match a ground antenna by the way. A Google search using 73khz amatuer band will get you lot's of hits.
For a permanent home setup I much prefer the 8' copper rods used for grounding home electrical systems to give me more cross sectional area which decreases the resistance obviously and less susceptible to variations in soil conductivity via drying out in the summer heat.
Works for me.
Randy
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