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Pinpoint reverse discrimination

A

Anonymous

Guest
In the old days I used one of the old Bounty Hunter detectors ( 840 model ) and found "reverse discrimination" to be a BIG help in pinpointing and verifying target id. I found I can use this technique to pinpoint with the XS as well and use it frequently now. The technique is this:
When getting a good signal in either iron mask or Smart Screen, stop the coil on TOP of the spot you suspect the target to be. Hit the pinpoint button while still over the target. When in pinpoint, move the coil off target. The sound becomes audible when off target and nulls again when back on top of target. Works just the opposite of what you think pinpoint should..when the sound nulls, you are directly over the target with the target under l" in from the front center edge of the coil.
The advantage of this is that it saves you the trouble of moving coil off target and possibly onto another surrounding target, then having to go back and find the original target again. I can do this in about half the time and is accurate every time I have tried it. Seems to work with all coils but best with the new Sunray 8"...Never missed an exact pinpoint yet. Any comments? Bill
 
Great tip, Thanks ! <IMG SRC="/forums/images/smile.gif" BORDER=0 ALT=":)">
 
<FONT COLOR="#ff0000">I AM LOOKING TO ORGANIZE A 5 MILLION MAN MARCH AGAINST DISCRIMINATION OF ANY KIND.
I'D LIKE THIS MARCH TO HAPPEN BETWEEN JULY 3D AND JULY 4TH 2005. WOULD YOU LET ME POST THIS? THE STARTING POINT IS EACH PERSON'S HOME TOWN. ED</FONT>
 
Imagine all of the oldtimers used reverse discrimination and thanks for sharing your experiments as every little bit helps. Personally in the majority of targets dom't even press the pinpoint button and run the coil back until noise stops from several directions and works fine for me. If I suspect a large target will use the pinpoint button to get a better idea of size etc. Perhaps my years of detecting have paid off as double D coils prevent no serious pinpoint problems. Just have to experiment to find a way that works as there are many. If you need an additional pinpointer be my guest as whatever works and again Bill thanks for sharing your experiences as perhaps it will make pinpointing easier for some. Raining like heck right now or would go out in my test garden that has been planted for years and try it out as indeed in cetain circumstances may help me. Never can know too much in this hobby and again knowledge is the key to become proficient.
 
Dan,
I have only been using the Explorer II for 10 months. I am still not very high on the learning curve. I hunt in an area with a lot of rusty iron trash. I run with iron mask set to -12 to -15. This eliminates most of the rusty iron. But, if the outer rim of the search coil passes over rusty iron , then the target will often break through the mask and put the cursor quite a bit away from the upper left corner and looks like a deep coin. These results can occur even when swept from a couple of different directions (The target just falls under a different section of the out rim of the coil.). I would dig down and locate the target off to the side using the X1 probe. The target would be rusty iron. I would scratch my head wondering how I could pinpoint so badly and why the rusty iron sounded so good.
That problem has been solved for me by switching to the pinpoint mode and reexamining the target. By sweeping the coil using the "Xing" technique, I find that the target is located a few inches away from where I originally thought it was. After determining the actual position of the target, turning off the pinpoint mode and turning off the mask, I find that the target is "nailed" in the upper left corner and there really is no target at the originally pinpointed location.
I would also note that one could have probably done the same thing by simply switching off the mask and sweeping slowly over the target from a couple of different directions. But there is still the tendency to think that there are two targets.
I would appreciate comments from other folks on how they approach this problem.
HH, Glenn
 
Captain Kirk, the idea is to get the most flux into the target for good ID. That is a problem as you understand unless you know the location of the target. Pinpointing will narrow the target down to a location that will give you a much better ID. Less trash to dig is just one advantage. You will also notice that coins will stay put while trash of different sizes and shapes seem to crawl around in the dirt. Sometimes they are a good 6 inches from where they first appear to be due to the weak flux at the edges of the electromagnetic footprint. Pinpoint is a very vauable tool and has an auto shrinking circuit that is often not understood. Look in the manual about pinpointing and you will see that the target size is decreased to help locate the exact center.
HH, Cody
 
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