Does higher Freq, mean deeper targets?

[Pulltab Parson]

Hey all,

If your machine is running at a higher freq, does this increase the potential for smaller deeper targets? What is the benefit of having a detector with a higher freq?

Thanks for the input,

HH
PTP

 

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[dimedigger]

maybe this will help

Question and Answer Session with FT-Fisher Engineers David Johnson and John Gardiner

 

[Jeff H]

Hopefully someone who really understands will wiegh in. From my experience and knowledge, all I can say is "it all depends". It depends on many factors including ground mineralization, EMI, your target's VDI etc. On my two-frequency machine, the lower frequency is usually more sensitive to smaller high VDI objects because of my prevaling ground conditions. However in many parts of the country, just the opposite holds true.

 

[Pulltab Parson]

Thanks Dimedigger! That was some great info, I like the fact that, even as Fisher guys, they mention the quality of other products, that says a great deal about their respect of other manufactures! that makes me look at Fisher in a new way!

HH
PTP

 

[Terry Soloman]

The deepest VLF machines use multiple frequencies, because low conductors like lead and gold send better return signals at higher frequencies than high conductors - like copper and silver, which transmit at lower frequencies. Mineralization and soil/sand conductivity also play important roles. Pulse Induction metal detectors are the deepest, but are "All Metal" detectors with no discrimination abilities.