coils for the hottest ground

[sd2200d digger]

I know this has been talked about before but there are some places that need the best coils around to handle this type of ground, it's a red moist soil in the forest that has always got moister. I have been using a gpx 5000 and a 10"x 5" DD commander coil, this coil still plays up on this ground and the monos are no good at all. Can anyone tell me why even a DD struggles?
Thanks,
sd2200d digger. 
PS I checked for charcoal here and there is none around.

[Doug]

I know this has been talked about before but there are some places that need the best coils around to handle this type of ground, it's a red moist soil in the forest that has always got moister. I have been using a gpx 5000 and a 10"x 5" DD commander coil, this coil still plays up on this ground and the monos are no good at all. Can anyone tell me why even a DD struggles?
Thanks,
sd2200d digger. 
PS I checked for charcoal here and there is none around.

What timings are you running in?
Perhaps try running in salt gold settings because the ground could be slightly conductive particularly when it is wet! Some porous clay are conductive because they retain water (which may contain dissolved salts=conductive).
doug

[sd2200d digger]

Hi Doug,
I think I have tried salt gold before but I will try it again. Will a larger DD do the trick say 11"commander?

[Doug]

Hi Doug,
I think I have tried salt gold before but I will try it again. Will a larger DD do the trick say 11"commander?

Sometimes larger coils are better because they average out the ground signal from a larger volume of ground ie  they tend to average out the smaller changes in the ground.
Remember with a DD to scan slow.
doug

[sd2200d digger]

Thanks Doug,
My biggest problem here is that the ground is a jungle, rainfores and is just so overgrown with pest weeds that it's even hard to just get through the place.

[sd2200d digger]

  Hi Doug,
went out today for 3 hours with the 5000 and used the 11"DD commander, used Salt Gold as you suggested and was a little quieter but when I hit the wet clay soil in the gully didn't have much joy.
Reduced the Gain to 12-13 and  stabilzer to 7 with tracking speeds of very slow. Managed to find a .85 gram nugget but it was very hard to tell the difference between the nugget and all that chatter.
Is there anything that can be done here?

[Mechanic]

Hi Digger,

Have you heard of Bogenes settings?

From what I understand of it you run the gain high, very low numbers on the stabiliser and the threshold set to max silent. Then anything that makes a consistent response dig it up. Do a search on finders there is a thread there that discusses it. You might have to fiddle with the gain to get the detector stable.

Cheers Mick

[sd2200d digger]

Hi Mick,
Yes heard of it but never gave it a try, one thing though do the guys using these settings find any small gold? I thought the worst ground for detecting was in WA, detecting in this forest tells me otherwise.....
Thanks,
sd2200d digger.

[Mechanic]

Yes I do believe that they find small bits with those settings. Give 'em a try, what you got to lose? Perhaps try it out at a spot where you have found a few bits before.

Cheers Mick

[Doug]

Hi Doug,
went out today for 3 hours with the 5000 and used the 11"DD commander, used Salt Gold as you suggested and was a little quieter but when I hit the wet clay soil in the gully didn't have much joy.
Reduced the Gain to 12-13 and  stabilzer to 7 with tracking speeds of very slow. Managed to find a .85 gram nugget but it was very hard to tell the difference between the nugget and all that chatter.
Is there anything that can be done here?

What about  trying quiet audio and drop the gain even more? Try sensitive smooth with a mono?
doug

[authere]

Hi All,

You know what i reckon!!,wack it into CANCEL with a DD coil on and go for it, if you want more depth put on a bigger DD, Dats what i reckon!!!

Ron

[Doug]

Hi Doug,
went out today for 3 hours with the 5000 and used the 11"DD commander, used Salt Gold as you suggested and was a little quieter but when I hit the wet clay soil in the gully didn't have much joy.
Reduced the Gain to 12-13 and  stabilzer to 7 with tracking speeds of very slow. Managed to find a .85 gram nugget but it was very hard to tell the difference between the nugget and all that chatter.
Is there anything that can be done here?

What about  trying quiet audio and drop the gain even more? Try sensitive smooth with a mono?
doug

Another thought. Perhaps try using specific GB rather than general with perhaps slow tracking?
doug

[Doug]

Maybe Woody can solve your problem  with an older ML detector? “------Are your older detectors noisy in high mineral ground? We can cure it”
doug

[sd2200d digger]

Doug, I can only use quiet audio here with the DD and slow.
Mick, I will give it try next time.
Hi Authere, if micks Idea does not work I will try cancel mode but a bigger DD is out of the question because it's a jungle in that gully.
Don't know when I'll be back there but will keep you posted.
Thanks for all the advice,

sd2200d digger.

[sd2200d digger]

Hi Guys,
I went back to the spot a couple of days ago and pulled out 4 bits for 1.2g, but that was on top of the gully away from the really bad soil which is in the gully.I used an 11" DD commander on normal settings on top of the gully and afterwards went down into the gully and could not find any settings that would make it run smoothly, I even tried the no threshold trick and that did not work eigther. Doug, looks like I will give the specific GB a try next time as I have never used this setting before.
sd2200d digger.

[Doug]

Hi Guys,
I went back to the spot a couple of days ago and pulled out 4 bits for 1.2g, but that was on top of the gully away from the really bad soil which is in the gully.I used an 11" DD commander on normal settings on top of the gully and afterwards went down into the gully and could not find any settings that would make it run smoothly, I even tried the no threshold trick and that did not work eigther. Doug, looks like I will give the specific GB a try next time as I have never used this setting before.
sd2200d digger.

Are their any single wire earth return power lines in the vicinity?
doug

[sd2200d digger]

Doug, there are but they are at least 250m away and there are two gullies befor the power line.
sd2200d digger.

[Doug]

Doug, there are but they are at least 250m away and there are two gullies befor the power line.
sd2200d digger.

OK! What could be happening is that the single wire earth return currents which normally flow deep in the earth are close to the surface in the gully. These currents can take the path of least electrical resistance ie sub surface aquifers or fractures in the bedrock that contain water or watercourses or dams,water pipes,underground cables etc.These earth currents can generate low frequency "noise" because a circulating AC earth current will generate a time varying magnetic field and the ground becomes like a large target to the detector!
If this is the case then sadly their is nothing you can about it other than detect the ground when its drier.
http://en.wikipedia.org/wiki/Single-wire_earth_return
doug

[Doug]

Doug, there are but they are at least 250m away and there are two gullies befor the power line.
sd2200d digger.

OK! What could be happening is that the single wire earth return currents which normally flow deep in the earth are close to the surface in the gully. These currents can take the path of least electrical resistance ie sub surface aquifers or fractures in the bedrock that contain water or watercourses or dams,water pipes,underground cables etc.These earth currents can generate low frequency "noise" because a circulating AC earth current will generate a time varying magnetic field and the ground becomes like a large target to the detector!
If this is the case then sadly their is nothing you can about it other than detect the ground when its drier.
http://en.wikipedia.org/wiki/Single-wire_earth_return
doug

These single wire earth return currents can be up to 20amps depending on the line voltage!
doug

[sd2200d digger]

OK Doug,
Now that sounds too technical for me but I do get what you are telling me.
It's a real shame as this only happened because the town that was owned by the one Family was sold off in 40 acre lots and that's why there is electricity there now.
Do you think the Specific GB will work in this situation?
Thanks,
sd2200d digger