Frustrating game this detecting

Ok, so I figure I need a sieve of some kind  cause I keep digging hits only to find they have moved or I can no longer find the hit    . I have steered clear of the beach as some of u suggested    and am now working around a old house site up the road from me in the bush. Turned the disc down and keep getting hit after hit but can't find what ever is making the detector go off apart from the old rusty stuff that I am not interested in  : . Did find a brass belt buckle this arvo'    and there are plenty more signs in the area I was in, but it got to dark to see what I was digging so will go back tomorrow hopefully.
The place I am detecting  is sandy loamy soil, a few hundred meters from the beach. Will the detector still be giving false readings because it is so sandy with just a sprinkling of top soil and a lot of organics mixed through it or would I expect that with the disc turned down, I will get real hits and am just not looking hard enough for what ever it is that is causing it  : . Also, should I be turning down the sensitivity or by not running on max, will I miss deeper finds as most of what I am detecting, seems to be deeper down with the exception of just a few? 
Thanks for your help and suggestions, and as soon as I can afford to or find something worth selling that will pay for it      , I'll go get a proper detector instead of the chinese one I am now using.
Thanks, Z.

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Zoro, ghola is right dont be scared to turn the power down, because its abit like head lights in fog
or turning up the radio too loud, by turning the gain up to high you end up bringing up the ground noise
and you will be very surprized how little depth you will lose by turning it down, this will also help you
ID targets and sepperate them also, So give that ago and turn down the power,also if your machine has
manual ground balance then practice with that, if it is an Auto GB then ground Balance it and lock the setting
if you are in a junk filled site, Hope this helps.

AU

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I got a sieve today, a old bread delivery basket, from my local shop. It is a ideal size and weight and the wholes are small enough to catch a $2.00 coin. Might add another finer layer of mesh to it for smaller items like shell casings. am also thinking of adding 2 legs to one side only so I can prop it up on a angle for first throwing the dirt at and then also for making it easier on my back for the sieving movement, let the legs and hinges take all the weight and me just do the push pull for the vibrations for the sieve. I also need to find out more about these pin pointers that I have heard ppl talking about. Are they expensive and exactly how do they work? pity there isn't someone close by that I could go out with, who knows what they are doing so I can learn from experience. Never mind, I'll just keep digging holes till I get it figured out, lol. Happy hunting ppl, Z

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As to the sieve I made one a while back out of a cheap rocking toy I picked up for 6 bucks. I just used the rocker bottom and attached a sieve I made. I figured it would be easier then a single hinged sieve since I would not have to pick it up each time to add dirt. Also I can just shovel some dirt and use my foot to rock it back and forth. Or have my wife sitting by it rocking it while I shovel.

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Thanks for the post and the update Zoro, detecting is an ever improving set of skills and tools.
Detecting without a pinpointer is like driving in the sun without sunglasses, once you have used one,
you will wonder how you ever lived without one.  I use a Vibraprobe (acquired used for $50) and a Sunray
that came with my Minelab, but just about any will do, search the forum, or youtube for info about different ones.
Hope to see pictures of finds soon.   HH Robroy59

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