Quote:
Originally Posted by Geo
I tried it many times but i found better to pound the rods at bigger distance (40-50 cm).
The disadvadage was that was need more power from generator.
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Yes, I have seen some that separate the ground probes by several meters. Dell Winders said you can point the probes up it the air just 2-3 cm apart. This would be similar to using two L-rods. Imagine the probes/L-rods form an RC circuit. The gap between the probes/L-rods acts as a capacitor. Of you can use a coil. Either way you are sending out a signal that hits the target.
Some ground is too conductive and the signal cannot maintain pressure wave--it leaks out into the soil. So I suspect the wider spacing might work better here. Real dry soil needs closer spacing.
So yeah, there is a lot of discrepency. Rayfinder measures the resistance between the probes and adjusts to that. And as Dell Winders said, the air probes give greater range, and then as you get close to the target you can switch over to ground probes. His locators all used minimal power.