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"Size A" targets on GTI machines (word to the wise)...

lordmarcovan

New member
...or should I say, "a word to the NOT so wise", if you're anything like I was until Sunday's outing.

Yes, I know I am dumb sometimes, but silly me, I took the "Size A at two inches" (or at one inch) seriously for too long. I knew I should've taken that with a grain of salt, but lazy digger that I am, I bypassed those Size A's, not wanting to spend my time chasing BBs and tiny balls of foil through the grassroots, especially since my probe is still in the shop for fixin'.

In order to maximize my returns in the limited time I have on an outing, I often go for the "sure thing" and bypass anything likely to be trash or modern. I go after deeper coins and often leave the modern ones (and no doubt many goodies) in the ground, if the signals seem too loud or too big or too shallow. It loses me some finds, I fully realize, but it does save me some time, and I usually go home with a few older coins and relatively little in the way of trash. In other words, I usually stick to the Size B (coin-sized) targets that have a little depth to them.

I am a selective digger and a meter watcher. My relic hunting buddies would laugh at me, with good reason. But they go out to rural sites where you can dig everything. Not so on some of my urban coinshooting spots.

Anyway, back to the Size A thing. As I mentioned, I have been bypassing these signals for the most part, to save myself aggravation.

However, in Sunday's outing, I dug a few, to satisfy my curiosity.

The first "Size A at two inches" target was a 1948-D Wheat cent at four inches. (That's Size B, four inches).

The next "Size A at two inches" was a Mercury dime at five to six inches. (Again, both bigger and deeper than indicated: Size B, and more than two inches).

Word to the wise, if you are trusting your meter too much. I know you probably ARE wise, so word to the not-so wise, like me. I learned a lesson yesterday. A lesson I really should have already known. Take those meter readings with a healthy grain of salt- they're nice to have, and useful information, to be sure, but really the machine is just making an "educated guess", and depending on your angle of attack and how your coil sits on the ground, etc, the meter readings can vary widely.

I should have known, from my experience more than a decade ago, when I received a shallow "pulltab" reading at surface/one inch on my old GTA-500. I dug and sure enough, I found what at first looked like the tongue of an old pulltab from barely a half an inch deep, in the grassroots.

When I got it out of the plug, though, it was obviously NOT a pulltab.

1075186064034_DDcoin49.jpg


Watch your meters if you like, but don't forget to "read between the lines", and remember that the meter is not infallible, folks! This is why some relic hunters I know use machines without them. They claim a meter is like a crutch, and that it makes you too lazy. There is some truth to what they say, but I like having a meter for coinshooting, nonetheless. I just need to learn to interpret its quirks a little bit better. Obviously, the ear is as important a tool as the eyes. I've had to learn the different sounds in addition to interpreting the meter. I envy some of the oldtimers who can interpret by sound alone- that is a valuable skill I never completely developed, being a meter watcher.
 
The ID is far from accurate and only gives probable readings, not exact readings. Having cut my teeth on BFO's over 40 years ago I am not a meter watcher and seldom rely on it to determine whether I dig or not. If one relies totally on the display one will leave lots of goodies behind for someone like me. Detectorists are going to have to get over the notion that the detector can see the target. It can see it no better than you can. It's like sticking your arm deep into a 50 gallon barrel full of goldfish and trying to pick the one black fish out of the bunch

Bill
 
I have a new GTI 1500 and did not dig some targets which read "C" size. A guy with an MXT came behind me and found a penny, a dime and a nickel. I agree that the coin size and depth are only indicators. Is the graph at the top any more reliable than the depth and size readings (assuming perfect target pinpointing)?
 
Good post....I see sometimes a coin can be from A-C size. A because the coin is not sitting flat and it is detecting the side view of it. And C size because of the halo effect. I love A size targets. Show's the sensitivity of the GTI's. Alan (Ga)
 
From what I understand is the target size is due to the width of the target response tied to the sweep speed. I think you have to have your sweep exact and use a 14 inch sweep centered over the target. Still it's only a clue. I have only been notching out iron and digging repeatable beeps. Yes I look at the TID just to see what's it's saying. But I still dig even if it jumps around. As long as my beep sounds good I dig. I guess it's like this. If my screen had the Playboy channel. I would still dig a repeatable beep! I just like looking at something! :cheers:
 
Thanks for posting what you have found. It's surprising what shows up in the wrong spot of the meter. I don't know how many times I've seen it. I'm just glad that I'm not too selective as to only dig after a couple of notches.
Mick Evans.
 
When I get a signal on my 1500, I don't pay much attention to the size of the target but where on the scale it appears. If its anything from foil on up, I'll dig it! It's worth the extra work in the long run!

Peter

garrettguy
 
I used to be really selective as well, but I learned the hard way. I still look at the meter, but
I dig everything anyway. Many times the machine is right on but at other times I've been
fooled. Better safe than sorry, unless you have time constraints!

Regards
Robert R
 
im another one of those lazy diggers.ive just had my 1500 for about a month.ive checked some of those a targets and so far they have been folded up tin foil,but i can see a small ring or earring coming in.if im looking for the old deep stuff i go to zero disc. work real slow and just listen to the machine.i found a nice merc the other day,it was next to a piece of iron trash at about five inches.i think im going to get the small coil for the super trashy areas.does anyone have any comments on the small coil.
 
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