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What coil would be best to use for ancient copper?
- Thread starter cypearl
- Start date
Ancient bronze at depth would probably mostly be down low on the VDI scale depending on size. (AE 3/4s' from the later Roman period.) Larger module ass/duponis/sesterci would ring up into higher more solid number scatters. Coil size needed would vary depending on what the history of the soil build is and would start out with a large coil (concentric) and get a "hovering and bobbing" skillset dialed in for pinpointing and separation. Hillsides where "soil sluff" can expose earlier strata and furrowed feilds would probably demand a smaller concentric coil to "ride close" to the bumbs.
Where are you at? If it's mostly fields, your expected VDI's can get really really low due to deterioration from fertilizers with AE 3/4 scroat.
Get back to us with some history of the soil....big variables in detecting really old sites and there are tricks!
Where are you at? If it's mostly fields, your expected VDI's can get really really low due to deterioration from fertilizers with AE 3/4 scroat.
Get back to us with some history of the soil....big variables in detecting really old sites and there are tricks!
It is true that I hunt mostly in the fields in which I find most of the times the copper coins to be perished from fertilizers or may be and salt. The ground here it's high mineralized and I am finding a lot of small copper nuggets. Because of their shape roundish and thick they can be easily detected but I can not understand why I am missing the coins.
Thing with ancient coins is they are on their way to becoming soil! Your challenge is to look for "enomolies" (iffy targets) and keep an eye out for "uphill" raises/hills hard to plant w/more of a chance of metal to be in a nicer condition. Another thing is to get into any areas where dirt is disturbed, topsoil rings around construction sites,and old paths. Don't think that these are evident with casual observation....."look high" and study topography to indicate where a natural path "was".....things are in the way now but there are the areas in between.
Your saying "small/thicker bronze"? This indicates that you are in the Eastern Medditeranian (not in the western part). Coins of Greek fabric are thicker and much more easy to find because of that. These coins have a much larger variance in size than coins of Roman fabric (less standardization because of more complex trade differences between the different "city states") and you will find some cool stuff!
I'll do my best to help you figure out how to dial a system in.
Your saying "small/thicker bronze"? This indicates that you are in the Eastern Medditeranian (not in the western part). Coins of Greek fabric are thicker and much more easy to find because of that. These coins have a much larger variance in size than coins of Roman fabric (less standardization because of more complex trade differences between the different "city states") and you will find some cool stuff!
I'll do my best to help you figure out how to dial a system in.
A bigger coil is most definitely a main coil for you but by the time you figure in all the fertilizer/mineralization and natural......other approaches are what will bring in an increased find count besides ones concerning depth. By all means maxing out learning a big coil is a huge deal in ancient ground, but it's kinda hard to give you input with that one until you have one in your hands.
Here's the reasoning for my approach. I live in an area where maybe not "time" has led to much changing ground conditions and ground build, but with rain,moderate climate without sustained periods of freezing......these cause nature to easily be able to "reclaim" evidence of our populations past "footprint". This forces me to focus on conditions that expose it, or with noticing the little details, point me to where that land use was.
The Romans especially did not tread on ground lightly. They were brutal masters of there environment with logging wholesale, stripping land of it's topsoil,changing streamflow,flattening hills,extending land out into harbors...and dredging it back out to just name a few. Evidence of this level of land treatment (many times) never fully repairs by the normal ebs and flows of natures ability, or.....if the impact is big enough,anything future generations do on top of it is like wallpapering a cow....you can still tell it's a cow. Going through Europe (if you know what to look for) places they "thrashed on" are everywhere! One main reason it made sense to move the capitol around Italy and eventually....over into your direction,Constantinople. (By that time the Tiber was a silted up mess,lack of crop rotation had farmland "bled dry" and silting up local streams and harbors, localized organic pollution that "wouldn't go away" fast enough to leave something that would support a growing more diverse population and on and on.
Respectfully, there will always be three "frontiers" in metal detecting:
1. Depth
2. Target proximity to "junk metal".
3. Places where no one has been due to lack of evidence....study skills concerning land use history, knowing natural patterns of nature in reclaiming itself, and what we have done to change "it all" recently get you there!
It's out there.........pick your "frontier" and move between them as needed. Hope explaining this mindset helps...it has me. (What a beautiful part of the world your in!) The finds are there...it's just getting to them. (If you extrapolate population densities from say the Mid-Greek period on through Byzantine, and put each generation "on top" of that same dirt....even the lowest loss/burial numbers mean you are walking by hundreds of nice finds every day....depth isn't needed for them all!)
Here's the reasoning for my approach. I live in an area where maybe not "time" has led to much changing ground conditions and ground build, but with rain,moderate climate without sustained periods of freezing......these cause nature to easily be able to "reclaim" evidence of our populations past "footprint". This forces me to focus on conditions that expose it, or with noticing the little details, point me to where that land use was.
The Romans especially did not tread on ground lightly. They were brutal masters of there environment with logging wholesale, stripping land of it's topsoil,changing streamflow,flattening hills,extending land out into harbors...and dredging it back out to just name a few. Evidence of this level of land treatment (many times) never fully repairs by the normal ebs and flows of natures ability, or.....if the impact is big enough,anything future generations do on top of it is like wallpapering a cow....you can still tell it's a cow. Going through Europe (if you know what to look for) places they "thrashed on" are everywhere! One main reason it made sense to move the capitol around Italy and eventually....over into your direction,Constantinople. (By that time the Tiber was a silted up mess,lack of crop rotation had farmland "bled dry" and silting up local streams and harbors, localized organic pollution that "wouldn't go away" fast enough to leave something that would support a growing more diverse population and on and on.
Respectfully, there will always be three "frontiers" in metal detecting:
1. Depth
2. Target proximity to "junk metal".
3. Places where no one has been due to lack of evidence....study skills concerning land use history, knowing natural patterns of nature in reclaiming itself, and what we have done to change "it all" recently get you there!
It's out there.........pick your "frontier" and move between them as needed. Hope explaining this mindset helps...it has me. (What a beautiful part of the world your in!) The finds are there...it's just getting to them. (If you extrapolate population densities from say the Mid-Greek period on through Byzantine, and put each generation "on top" of that same dirt....even the lowest loss/burial numbers mean you are walking by hundreds of nice finds every day....depth isn't needed for them all!)
Yes, that sounds good to me, You know I found a program in whites official forum from a moderator there and its amazing on how it works with depth and with the 10dd stock coil. I made just a test and and hit something really deep more of a foot, it was a piece of junk but with my settings and programs was not possible to be heard at all. I am looking forward for my next hunt in June and I will let you know my results.nw1886 said:
I don't see what settings in that program would add anything to the stock program for depth except higher RX and long recovery delay. I have my doubts about using the correlate setting for the deepest targets. Are you running consistency with the program, as he is?
[attachment 267157 ScreenHunter_38May.3012.21.jpg]
[attachment 267157 ScreenHunter_38May.3012.21.jpg]
Rob (IL) said:You know from my posts that I feel it is important to know why you change a setting. My question is what makes this program so different from other programs and are you using consistency as he is?
What setting is different from your other program that gave you more depth?
Is consistency for audio as well? cause the thing that made me stop on the target was the tones.
Consistency is like does it see it see 2 outta 10 times or 8 outta ten times. More than the 2 outta10 constant is how well yr machine see's it.More 8 times is better . So the setting dictates the rate you want your machine to see a target the higher the more junk gets past and indicates a good target .The lower the consistancy the harder it gets to see a target and deeper targets are missed faster because the consistancy rate falls off faster.I may have the numbers back ward but Rob should have it in his hany facts section. This is how I see it. I use intencity myself. Yazoo
What makes me dig is the tones at first and then vdi number and finally pinpointing checking the frequencies. At least to be honest these are the things I am doing by far to determine if it worths to dig. Now I believe what gave more depth, is it first the filter and then excepting more targets than rejecting as many as the 'coin and jewelery' preset is or maybe the recovery delay gives the detector more time to analyze?? When I found that deep target I passed the coil slowly and then I tried to overlap my sweep and heard that signal wich it makes me believe so that delay recovery has to do something here.