The Search Coil! What it does? How to change it? When to change it? Why to change it?

[Lexicon7]

Hi Guys, first of all I am the quintessential rookie still shopping for my first detector but I do have an engineering background and lots of wisdom!
I have read lots on this great forum and it seems that the search coil is pretty much the heart of the matter! That being said, is not a deeper ground signal better although possibly not in all cases? I like to think outside the box as the saying goes and wondering about types of mods I could do to an entry level detector?? I would like to know all about search coil technology..

 

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[Terry Soloman]

In GENERAL:

Concentric coils are deeper than DD coils.
DD coils are better for small targets in heavy mineral soils and clays.
Lager coils give better depth
Smaller coils give better separation of good targets from junk in trashy areas

Coils also work differently at different frequencies when it comes to depth, sensitivity and separation.

 

[Carl-NC]

Lex, I wrote a book "Inside the Metal Detector" that explains how they work and includes DIY projects. The short answer is, eking out more performance than a metal detector engineer was able to eke out in the first place is a very tall task. But for some detectors in some locations, it is possible. I see you're in Bend, I'm in Corvallis if you happen this way. I'm a metal detector engineer, btw.

 

[Jason in Enid]

everything is a trade-off, coils included.

 

[Lexicon7]

Carl, that's great information and I am actually at the moment a snowbird in Yuma but my family is in Bend and I will be there most of the summer 2018.
I will look you up... Thanks again, Morgan

 

[Lexicon7]

Carl, that's great information and I am actually at the moment a snowbird in Yuma but my family is in Bend and I will be there most of the summer 2018.
I will look you up... Thanks again, Morgan