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How To Pinpoint On A Garrett Metal Detector Using An Elliptical Coil

A

Anonymous

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I have put together a pictoral set of instructions on "how to pinpoint on a Garrett metal detector" with ease. I don't know about you, but I am a visual learner, and pictures make a big difference. I hope this helps. I have been playing around with the GTP 1350 all week, and this method works well for me. It should also work on the yeller Feller. Try it, and let me know how it works out. <img src="/metal/html/smile.gif" border=0 width=15 height=15 alt=":)">
 
Great information John. Thanks for the photo. I see why I'm just off the target now
 
I might add - after you drag the coil back till the signal stops watch the signal strength as you jockey the coil backwards and forwards slightly. When all the cursors line up, the target will be right where John indicated. Great diagram John.
Bill
 
Thank you! I have a 1350 and I only get it right about half the time!!
 
pull the coil back until you just lose the signal, the target with these will be under the very tip down to about 6" with the older GTA, Master Hunter CX series, then the target starts to wander. Haven't had any experience with the newer GTI or Ace series. Wanted to throw that in as the enclosed DD coils are slightly different.
HH to everybody.
 
Due to the winding configuration most all DD's pinpoint off the tip of the coil because a DD detects as deep at each end of the coil as it does anywhere else.
Bill
 
I don't know if it's the machine or the ability of the coil that causes the loss of pinpoint at greater depths. I would think that it might be the machine that's picking up the signal at slightly greater depth in the center and losing the signal before reaching the tip as the machine signal generation pattern isn't exactly the same strength and reception tip to tip. The windings of a DD coil aren't a perfect sharp cornered "D" but round cornered. It would seem that shallower targets would still have enough of a signal to be detected at the tip but small deep targets shouldn't present anywhere near as large of a signal at the limit of the detection depth at the tip. You've had more experience than I have had with all kind's of coils so this is more like a question than a an arguemment. I haven't had the pleasure of using one of the new open eliptical coils and I appreciate the tip from John and only wanted to adde that there is a slight difference in pinpointing of the two coils.
HH
 
Yeah Garrett should copy Johns diagram and print it in their manuals or insert it as an addendum. Would sure help all those visually oriented.
Bill
 
The way the DD's are wound are two letter D's back to back with the spines slightly overlapping. This overlap creates an area about two inches wide the full length of the coil and this is the size and shape of the signal transmitted into the ground. This is why it's virtually impossible to detect with a DD moving the coil forwards and backwards except when pinpointing. Since DD's have no receiver coil for pinpointing the easist way to do it is off the front or back tip of the coil. But the deeper the target the more the signal weakens and shrinks in size and length, creating the discrepancy in target location as you pinpoint.
I hope I explained this clear enough without sounding like I'm rambling. <img src="/metal/html/smile.gif" border=0 width=15 height=15 alt=":)">
Bill
 
Is that in heavy trash, you sometimes have better results X-ing the coil over the target. I've hunted spots where you are dragging the coil back over junk, non-targets and the pinpoint signal just goes on forever!
If the pinpoint signal seems bigger than a coin, I'll turn 90 degrees and try it again to avoid trash-masking. If the target STILL seems too big, then I'll just "X" over the target in non-pinpoint mode to get a fix on the good target, assuming that there is junk on all sides. <img src="/metal/html/smile.gif" border=0 width=15 height=15 alt=":)">
HH All!
Skillet
 
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