Longhair
Elite Member
The beauty of the 705 is being able to tailor one machine to perform multiple tasks. Tailored for gold, lead, or other low conductors it would have one of the five available 18.75kHz coils on, while tailored for silver, copper, or any other high conductors it would have one of the three available 3kHz coils on.
The four available 7.5kHz coils are for general purpose use, or when soil conditions aren't condusive to utilizing one of the other frequencies.
At a site like his that's infested with trash objects, one of the eight available DD coils or the 6" 7.5kHz concentric coil would find more than the 9" 7.5kHz concentric that he's hunting with. Likely the three 15" DD coils would not do as well as the smaller ones at picking through the trash. My personal choice for his site would probably be the Minelab 6" HF DD(for gold) and the Coiltek 6" LF DD(for silver/copper).
The four available 7.5kHz coils are for general purpose use, or when soil conditions aren't condusive to utilizing one of the other frequencies.
At a site like his that's infested with trash objects, one of the eight available DD coils or the 6" 7.5kHz concentric coil would find more than the 9" 7.5kHz concentric that he's hunting with. Likely the three 15" DD coils would not do as well as the smaller ones at picking through the trash. My personal choice for his site would probably be the Minelab 6" HF DD(for gold) and the Coiltek 6" LF DD(for silver/copper).