Jump to content


Photo

gp extreme 18" mono


  • Please log in to reply
7 replies to this topic

#1 buffalochip

buffalochip
  • Members
  • 15 posts
  • Gender:Male
  • Location:Prescott valley, Az
  • Interests:Gold, 4 wheeling, exploring new places

Posted 25 March 2012 - 06:45 PM

Does anyone out there know anything about the gp extreme 18" mono? I picked one up that is brand new and intend on using it on my gpx 5000. How does this compare as far as sensitivity and depth to the 18" commander? Just curious, thanks ahead of time for the help.

#2 Reno Chris

Reno Chris
  • Members
  • 1,065 posts
  • Gender:Male
  • Location:Reno, Nevada
  • Interests:Gold Prospecting

Posted 25 March 2012 - 10:54 PM

The 18 inch coil that came as original equipment with the GP Extreme is a DD coil, not a mono.

#3 buffalochip

buffalochip
  • Members
  • 15 posts
  • Gender:Male
  • Location:Prescott valley, Az
  • Interests:Gold, 4 wheeling, exploring new places

Posted 26 March 2012 - 03:20 AM

Thanks, i was told it was a mono, guess i'll have to try it out.

#4 cp90macs

cp90macs
  • Members
  • 82 posts
  • Gender:Male
  • Location:Mesa, AZ
  • Interests:prospecting, photography, US NAVY 73-77.

Posted 27 March 2012 - 06:32 PM

My friend just bought a 18" Extreme coil too, but I haven't try it yet on my 5000. I would be interested in the results you get. Please keep us posted!
More Au to you, Robert

#5 Rob Allison

Rob Allison

    Forum Owner & Admin

  • Admin
  • 9,002 posts
  • Gender:Male
  • Location:Behind the MINELAB GPX5000!!

Posted 27 March 2012 - 07:43 PM

Hey Guys,

Just like Chris Ralph stated, the Black 18-inch Extreme searchcoil is a DD, not a Mono. That being said, by flipping your coil switch to "Normal" on the GP Extreme's control box, you can toggle from DD to Pseudo Mono (1/2 Mono coil). This method works best when you're using the DD and want to pinpoint or narrow in on a target.

The stock 11-inch round is also the same.

Hope this helps,

Rob Allison
Rob's Detector Sales
Online Gold Prospecting Outfitter
website - www.nuggethunting.com
online store - www.robsdetectors.com
623.362.1459 (office)
602.909.9008 (cell)

#6 buffalochip

buffalochip
  • Members
  • 15 posts
  • Gender:Male
  • Location:Prescott valley, Az
  • Interests:Gold, 4 wheeling, exploring new places

Posted 27 March 2012 - 08:01 PM

how deep will this coil go and how sensitive is it compared to a mono the same size? A friend of mine bought one too and says it is dd, but should be a good patch finder, thanks for the help, Chip

#7 Rob Allison

Rob Allison

    Forum Owner & Admin

  • Admin
  • 9,002 posts
  • Gender:Male
  • Location:Behind the MINELAB GPX5000!!

Posted 29 March 2012 - 06:41 AM

Hey Buffalochip,

There are many factors when you talk about depth. Some of the major ones are detector used and settings, size of coil, size of target, conductivity of target, shape and orientation of the target & mineralization are just a few.

The is no doubt a true Mono 18-inch will achieve more depth than a 18-inch DD.

You will get better sensitivity if you flip the coil swtich to Mono and use 1/2 of the DD coil as a Monoloop.

Also, when it comes to coils, the general rule of thumb is smaller coils are better for tight areas, smaller gold near the surface and lighter to manuever. As you increase the coil size, you drop some sensitivity to small gold, but increase coveage per swing and depth on larger targets.

There is also a general rule of thumb when it comes to elliptical vs. mono's. You can take the lenght + wide (example, 10x5) 10 + 5 = 15 and divide that number by 2 (15/2 = 7.5 inches). This will give you a approx side it would be to a Mono. That being said, a 10x5 elliptical is like having a 7.5-inch round coil.

Hope this helps a bit,

Rob Allison
Rob's Detector Sales
Online Gold Prospecting Outfitter
website - www.nuggethunting.com
online store - www.robsdetectors.com
623.362.1459 (office)
602.909.9008 (cell)

#8 buffalochip

buffalochip
  • Members
  • 15 posts
  • Gender:Male
  • Location:Prescott valley, Az
  • Interests:Gold, 4 wheeling, exploring new places

Posted 29 March 2012 - 07:51 PM

Thanks Rob, I'm just going to have to give it a try i guess. See you at rich hill Saturday, Chip




0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users