New Zealand Gold Prospecting & Metal Detecting Forums Archive

 

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chrischch  
Posted : Saturday, 13 July 2013 3:22:43 PM(UTC)
chrischch

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I'm off to hagley opposite the high school.....you can get hold of me 027 3700293 or just come along as my cell is almost flat......i just got my licence back so am able to go out again! yah! Be good to meet some more of you.
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oroplata  
Posted : Saturday, 13 July 2013 3:52:32 PM(UTC)
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I have top get a garage floor ready for painting. :(
chrischch  
Posted : Saturday, 13 July 2013 6:14:09 PM(UTC)
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Well that was disappointing.....in 1.5 hours, I only found a penny and a half penny (both the older type). I think my detector is playing up as I never ever find silver coins but find bulk old pennies and new stuff. I have probably close to 500 pennies but only about 6 or 7 silvers! My machine has started acting a little erratic and switches itself off at times too. Could be water on the circuit board (condensation) I guess so will try dry it out by the fire tonight.
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Shilo  
Posted : Saturday, 13 July 2013 7:06:41 PM(UTC)
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What sort of detector is it? This may sound obvious but make sure you haven't got discrimination set for only the penny vdi up. A lot of silvers especially the smaller ones can come in fairly low and if you have everything under lets say a $1 coin discriminated out you will miss them.

Of course the other alternative is that all the other Christchurch detectorists have already covered the areas you go to and creamed off all the silvers whilst discriminating out pennies on their detectors.

Edited by user Saturday, 13 July 2013 7:07:22 PM(UTC)  | Reason: Not specified

chrischch  
Posted : Sunday, 14 July 2013 1:22:39 AM(UTC)
chrischch

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That could be part of the issue as i was obn the understanding that pretty much anything from a 6pence up would be above the 1 dollar coin level so when I'm being lazy, I discriminate everything below the $1 coin mark like you said.
I'm using a F2 and was expecting silvers to be above 60. $1 is 59/61 and $2=62 Pennies seem to be about 68/70 as do 2c pieces.

Anyone with a f2 care to comment on where they find their silvers on the scale?
Fisher Goldbug Pro, Fisher F2, Garrett Propointer.
chrischch  
Posted : Sunday, 14 July 2013 1:57:25 AM(UTC)
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I see some gold bugs were recalled and shipped with a fault that caused them to miss big silvers! I guess Chris (poohbear) didn't get that one! I'm going to see if there was a similar issue with f2's now as it has me wondering. My percentages are just way off everyone elses. Seems odd but it could be user error too of course!
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oroplata  
Posted : Sunday, 14 July 2013 2:24:19 AM(UTC)
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I think silver 3d and 6d's read low because they're so damn thin. Especially the badly worn ex-necklace vickies.

chchnuggetdetect  
Posted : Sunday, 14 July 2013 7:03:31 AM(UTC)
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I went to hagley with a garrett ace (150) and it avoided iron and pulltabs but the coins/rings turned out to be green bottle tops possibly aluminium. A squashed can also. 3 junks in a row and I want your wet F2. How good is the F2 at avoiding junk? How much junk did you dig?








Shilo  
Posted : Sunday, 14 July 2013 10:16:55 AM(UTC)
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Originally Posted by: oroplata Go to Quoted Post

I think silver 3d and 6d's read low because they're so damn thin. Especially the badly worn ex-necklace vickies.


True that. Also the deeper a target the more inaccurate its VDI will be, for a shilling size or smaller the possibility of this inaccuracy starts at only around 4-6" and this will apply to most detector makes. By the time you get down to 8-10" the VDI can be very unreliable especially if the ground contains a lot of minerals or fertilizer or even if it's dry.

Best to not rely on the detector to much. For example pull tabs will ring up clean but are normally shallower then silvers, thus if it is only a couple of cm below the surface - ignore it, but if its deep - dig. Cans have a large detection field so if the object pin points as a large one then chances are it will be a can (also if it still tones off with the coil lifted it will also be a can). The VDI is only a rough guide - your choice to dig or not should take a lot more things into account.

Also remember the majority of our "silvers" only contain 50% silver and thus will ring up lower then the pre-1933 English ones.

Edited by user Sunday, 14 July 2013 11:03:00 AM(UTC)  | Reason: Not specified

chrischch  
Posted : Sunday, 14 July 2013 3:11:04 PM(UTC)
chrischch

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Originally Posted by: chchnuggetdetect Go to Quoted Post
I went to hagley with a garrett ace (150) and it avoided iron and pulltabs but the coins/rings turned out to be green bottle tops possibly aluminium. A squashed can also. 3 junks in a row and I want your wet F2. How good is the F2 at avoiding junk? How much junk did you dig?

I was hoping to get back out today but the weathers not looking good. Looks like i'l have to wait until tomorrow at least.









I dug a bit of junk but avoid cans like has been suggested, by raising the coil up and if it still sounds off then it is usually a can. Also cans are bigger targets and after a while you can tell. I feel the f2 is better than the ace 150 and 250 due to the aces not having the target id display so therefore can did less junk when looking for modern spendables but when looking for old stuff and relics/jewellery, you want to dig everything.

Edited by user Sunday, 14 July 2013 3:12:35 PM(UTC)  | Reason: Not specified

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