Compare Garrett 9×12″ Concentric Coil with Stock 8.5×11″ DD

Ok, just viewed an air test of the Garrett 9×12″ concentric coil vs the Garrett Stock 8.5 x 11″ Double D coil. He used the two coils on the AT Max. The test was done  on an individual’s metal detecting channel on Youtube. Full disclosure requires me to let you know that I like most of his videos and being well filmed and an accurate representation of the metal detecting hobby with little or no hype.

Now here is where I fault his air test. The air test shows the concentric coil delivering better results on deep targets. Well that is a given due to the different coil designs. The DD coil will deliver a full 11″ swath at max depth whereas the concentric coil (using a cone pattern) will deliver only an inch or so swath at maximum depth. So now lets figure in the hunting time looking for deep objects. It is 11 to 1 ration in favor of the Double D coil. So a 2 hour hunt of a specific area with the  Double D coil will turn into to a 22 hour hunt using the concentric coil.

On the upper beach or volley ball court or areas where the targets are only 2″ deep, then the coils are basically equal. On a search for deep coins or jewelry, you could not possibly consider using a concentric coil.


Getting Skunked

I have been metal detecting since the mid 1980’s. Started first with the Fisher Gold Bug and the Garrett Coin Hunter.  We always did pretty good with the Fisher gold bug up in the hills and gold bearing streams. Took a few years off  from metal detecting and then got back into the hobby and learned some more about metal detecting.  But it wasn’t until about 10 years ago when I started really learning this great hobby. Spent much more time hunting and researching for sites and learning from others.

So I consider myself an adequate metal detectorists. If the target is there, and even in a junky park I will find it. Why? Because I have put in the hours learning from hunting in very trashy parks. Once you learn in this environment other areas like home sites and beaches are not so hard.

I used to complain about the junky park near home. The areas around the concrete picnic tables were loaded with foil, pop tops, bobby pins and bottle caps at all depth. This was a rather old and very popular park on the weekend. So it is getting loaded down with even more trash every weekend and yes even with some dropped coins. A good friend who is more experienced than I am, told me to look at it another way. He said, “You have the best training area for metal detecting within 1/2 mile of your house. You are pulling targets out among all that junk. You should be able to hunt anywhere and be successful.

So that brings me up to the times when you get skunked and don’t find silver. If you can reliably pull clad out at 4-6 inches hidden under, near or even above junk targets, you can pull silver coins out from the same areas. But with one qualifier. The silver has to be there. Yes I do get skunked and find no silver. Some days I even get doubled skunked and don’t even find clad. Not getting double skunked is somewhat rare for me, but it happens when you are hunting an area that has no clad or silver. This is the time to move on to another hunt site. Even when you get skunked, you have spent the day outdoor away from your work, so what is so wrong with that?

Why serious beach hunters use the best detectors

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You can usually tell the serious beach hunters from the vacation guys by the hardware they are swinging. Look at this video and pay attention to the last part.

A machine like the Minelab Explorer has the best of both worlds. A double D coil and lots of frequencies being used at one time. So if you are within 2 hours from an ocean beach with lots of hotels and condo’s then seriously consider buy a better beach detector. You can find the Minelab Explorer SE used for about $500 on ebay.