Well, I don't claim to know much about this, but I have used the AGR formula and I found some peculiar results. Anybody here recall Sam "Lobo" Wolf how he used the sunshine as a transmitter and the reflected ray comes back off the target down range at the same angle (up range, too). Actually this was first described somewhat in the book "Supersensonics". Anyway, I was getting something similar to this only instead of sunshine it was from the radio station I was getting a hit down range from the target. I also get a hit over the target. At least I think that is what is happening. It could be some fundamental ray I am picking up. I need to try a different element to see if I get the same angle or not.
It has also occurred to me that these pistol type detectors that send out a frequency might be better off to have a stationary transmitter like the MFD uses. This way the signal line has time to develop. And they might consider using the AGR formula. Of course I am using an L-rod and this is much more sensitive than any radio receiver. You look at the info on the AGR and it says large ore bodies from 100 feet. That's crude but I applaud them for their work.
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