DetectingWales.com

Hi all,

Over the Christmas myself and Joross are going to do a little test using a Dobunni gold quarter stater buried in the ground from one inch and so on, we will use different settings/programs.....If anyone wants us to try there settings just post them up, and we will give you the results, it may be information gained for both?
We hear a lot about " I don't dig anything under this under that " so we thought we would do a little test on a coin we would all love to find.
Il also run the Tejon over just to see how it compares.

any other thoughts what we can do on our test would be helpful.

Results will be given  just after Christmas. 

I did this test myself and the 12KHz frequency was deepest.

TX at 3 didn't make any discernible difference. Better just putting up the sensitivity and making sure it's ground balanced efficiently.

Certainly teaches you about your machine.

Cheers for your input rjm it all helps ;) I posted early as I want to get a few ideas first

It sounds as if this could be an interesting and fun thread, one item you might try with the Deus is a small Roman T-brooch, these generally give an awful signal on any machine for there size/mass and I know that Deadlock found one at a rally a few months back and when in the soil Da monkey couldn't get a reading on the Deus, this I believe was at only 5". ;)

Don't forget to try it on edge too - and there's also the difference between 'pasture' and ploughed - a friend of mine dug a hole and then cut a little gallery in the side of this, in which he put the test coin - this meant that at least quite a lot of the soil about the coin was compacted. That certainly made a difference to detection depth.

Of course there's also the issue of the 'halo' effect - when coins have been in ground for some time they appear bigger because some of the metal ions leach into the surrounding soil (the green patch around bronzes for instance). It's harder to test for that in this kind of experiment - but your test is of course harder.

 :o A quarter stater on edge ??? You don't want much do you lol

I don't think you get the halo effect with gold.... Like probono said try it at different angles in the ground.... Think you ll loose it when it's vertical... Let us know

Be interesting experiment

As far as I'm aware there's no evidence to prove that a "halo effect" even exists ???

Just a thought (as I'm thinking on my feet - well actually sitting down at the mo) - you need something to be able to conduct electricity to detect it with a metal detector (that's why semi-conductor materials like Galena are detected too) - so much like a salt solution will conduct electricity, if the corrosion products are at all water soluble and leach into the surrounding soil then the object should appear a bit bigger (especially when the ground is moist).

I've often noticed around a coin a darker area of soil, which (most of the time) must come from some interaction between the coin and the corrosion products.

As to the gold 1/4 stater, unless it is pure gold there will be impurities (like copper and silver) which could cause a 'halo' effect if it exists...

...but I admit that I've got no concrete evidence - just trying to think of reasons why it might happen....

Ok Geoff I will also try a T-brooch in the test.
The test will be done on short pasture so the coil will be flat to the ground, il take the plug out at the right depth so the ground will be pretty much intact.
The coin being used is a Vale of Pewsey quarter so it is base but mainly gold, the weight is light @ 0.9g so putting the coin on its side will be hard to pick up....I will take a photo of the coin sat on the coil to show the size.

If I am out detecting in your back garden Dale and I come across your test bed you know dads claiming them all as his .........UM  how does it go .....oh yes finders keepers

Sorry they are out of your depth :o !! OUCH  :D ;)

 ;) ;) ;)great banter you guys ;) ;) ;)

You tell him Dale ;D

Possession is 9/10 of the law  ............ see you in court   x

Joking aside Dale  I think this is an intreating topic and looking forward to your test results.

Hear is the coin being used in the test, iv placed it next to a 1p to show the size,
il also bury a roman grot the same size as the quarter to see the difference between the two and readouts.
I just ran my Tejon over the coin doing a air test it was picking it up at 5inches with the 10x12 coil on, im thinking that will half in the ground?

I hoping to do the test tomorrow.......... any other thoughts on setting the Deus :)   

Now ive seen the coin I  am deffo detecting your garden tomorrow ............... might even become a nighthawk lol ........ lovely coin you gor there Dale

I look forward to seeing the results

Could you please try Deus fast with reactivity set at 3 also on 2 and 12khz also 18khz
Thanks
 Geoff

Thanks Geoff for your input, I will take note and post your results ;)

I'm certainly interested in what frequency / machine you found was best with the gold. I know that Chef doesn't rate the Minelabs on small gold - and I'm interested to see if I've missed anything :) - smallest gold item so far has been about 1gram...

When I say "not good" I'm talking about micro jewellery, chains, backs of earrings etc, even then it's not so much size as profile.
A quarter stater will always have a better profile than a cut quarter and minelabs find those OK but on edge that's a different story.
Fortunately for our sanity regardless of which machine we use we never know what we miss, a case of ignorance is bliss ;)

I don't think a Deus has much trouble finding those small quarter gold staters  ;D

 Joross has fallen in love, its not with his Deus, but a woman :o lol so he is a busy man at the moment but as soon as he is free the test will be done....... ;)

It shouldn't have much trouble, if its lying right and not to deep, im just wondering what depth it will be lost and the readouts.

relichunting have you any settings you want tested? 

Not really mate there are two versions being used V3.2 and V2

All my settings and programmes are for the earlier V2

As long as a Deus is correctly ground balanced and your using a slower reactivity speed of 1- 2 you should have no problems getting a quarter stater

Off out now to test the Deus, we are equipped with the quarter, roman grot, also the T-brooch  ;) results later if all is well :)

I know everyone is waiting but it did not go to plan, the machine is new to Joe it was just not fair to test it out yet, he is still getting his head around it all ::) its turned a little embarrassing for me at the moment, sorry.

Never mind Dale. Let the thread rest a while whilst you guys get to grips with the machines and then post up the findings in due course. there's no rush.

Lol, come on Dale cough it up, are you saying that out of the box it couldn't find them?

Maybe? but im sure it will... we were a little confused yesterday at some of the read outs the Deus was giving, its only his 2nd time out with the machine so he needs a little experience first... thinking of it I jumped into the thread a little early as I to wanted to see the results. :-\

It sounds sweet with the Tejon tho :) I did make some deep pasture finds yesterday, I think after 15 months with my machine iv only just really learnt the very deep ones ??? I thought I was there with the machine but clearly not, iv started digging sounds if you can even call it a sound its a two way Flick, its hard to believe something is there, im a little amazed at the moment with the depth on pasture, im a ploughed man, but pasture is the new thing at the moment.......... il post the finds later  ;)