Mono Coil Versus DD Depth Difference
Another coil question. Given that a mono coils sends a signal that is cone shaped into the ground what would the field of detection be on say a 12 in mono at say 10 inches vs a DD coil that has a blade shaped signal. Say this is in mild ground. Just how much depth is actually lost using a DD coil in the same soil conditions. Would a broader signal at that same 10 inches of depth have an advantage with coverage at that depth?
I was hoping you would chime in JP - great explanation, thanks!
I have yet to observe the famous DD blade as sold by marketers actually exhibit itself on a coil. Just take a DD coil and a coin and run some brief air tests (see article below under heading "Target Size"), and except for tiny objects the blade thing is largely myth. All the DD thing does is cause the electromagnetic field to elongate and become a little shallower compared to a mono coil (or concentrics on VLF detectors). The f