Welcome guest, is this your first visit?
Member
Discoveries
 
Results 1 to 14 of 14
Like Tree24Likes
  • 9 Post By Loco-Digger
  • 4 Post By devldog
  • 3 Post By madmantrapper
  • 2 Post By cudamark
  • 1 Post By Loco-Digger
  • 1 Post By Slowtaknow
  • 2 Post By cudamark
  • 1 Post By George (MN)
  • 1 Post By Eleven Cents

Thread: detector coils

« Prev Thread | Next Thread »
  1. #1
    us
    Sep 2018
    Carroll County, Maryland
    89
    68 times
    All Types Of Treasure Hunting

    detector coils

    What effect does the diameter of the coil have?

  2. #2
    Charter Member
    us
    Coin Rescue Tech

    Jun 2014
    Northern O-H-I-O
    F75 LTD, 1280X Aquanaut, & an F2 (loaner)
    11,308
    16369 times
    Metal Detecting
    Banner Finds (1)
    Basically the larger the coil the deeper it detects. You give up target separation though. Just know that a larger coil has more of a chance of having more than one target in its detecting field. I have 4 coils for my machine. I use the large coil in target sparse sites such as fields. Some places I need better target separation so I go with a smaller coil.

    There are 2 basic types of coils. Concentric and DD. The pics below shows how they scan the ground. I prefer DD coils over concentric coils.

    Concentric coil
    Click image for larger version. 

Name:	concentric_searchcoil.jpg 
Views:	43 
Size:	29.6 KB 
ID:	1634071

    DD coil
    Click image for larger version. 

Name:	double_d_searchcoil.jpg 
Views:	46 
Size:	28.7 KB 
ID:	1634072

    Hope this helped.
    Rescuing Coins 1 Beep at a time

  3. #3
    us
    Mar 2012
    Georgia
    Whites MXT ALL PRO,
    1,279
    1623 times
    Relic Hunting
    You pretty much nailed it Loco. Well Done.
    Kace, Loco-Digger, A2coins and 1 others like this.

  4. #4
    us
    Sep 2018
    Carroll County, Maryland
    89
    68 times
    All Types Of Treasure Hunting
    Yes this helps greatly. Thank you
    A2coins, Kace and Loco-Digger like this.

  5. #5
    us
    Mar 2011
    San Diego
    Equinox 800, Treasure Probe IV, E-Trac, 3 Excal 1000's, White's GM3 V-sat. White's TM808, VibraProbe, 15" NEL Attack, 5X10 Joey, Steath 920ix and 720i, TRX, etc....
    8,858
    5823 times
    All Types Of Treasure Hunting
    Honorable Mentions (3)
    Also, as a general rule, the smaller coils will be more sensitive to tiny targets than a large diameter coil.
    Slowtaknow and A2coins like this.
    "jus cuz it's wrote down, don't make it so"

  6. #6
    Charter Member
    us
    Coin Rescue Tech

    Jun 2014
    Northern O-H-I-O
    F75 LTD, 1280X Aquanaut, & an F2 (loaner)
    11,308
    16369 times
    Metal Detecting
    Banner Finds (1)
    Quote Originally Posted by cudamark View Post
    Also, as a general rule, the smaller coils will be more sensitive to tiny targets than a large diameter coil.
    I thought that frequency of the detector has more to do with what you mentioned than coil size. The higher the freq, the smaller the target it can detect is my understanding.

    Click image for larger version. 

Name:	Capture.JPG 
Views:	59 
Size:	80.3 KB 
ID:	1634468
    A2coins likes this.
    Rescuing Coins 1 Beep at a time

  7. #7
    us
    Oct 2015
    Kannapolis nc
    Fisher f2, Tesoro vaquero
    185
    180 times
    Metal Detecting
    It does on gold, plus smaller equals smaller gold
    A2coins likes this.

  8. #8
    us
    Mar 2011
    San Diego
    Equinox 800, Treasure Probe IV, E-Trac, 3 Excal 1000's, White's GM3 V-sat. White's TM808, VibraProbe, 15" NEL Attack, 5X10 Joey, Steath 920ix and 720i, TRX, etc....
    8,858
    5823 times
    All Types Of Treasure Hunting
    Honorable Mentions (3)
    I agree. Both size and frequency play a part in tiny target detection. I didn't mention frequency because the OP was just asking about the effect of size. Concentric and DD design will also slightly effect sensitivity to tiny targets.
    A2coins and Loco-Digger like this.
    "jus cuz it's wrote down, don't make it so"

  9. #9
    Charter Member
    us
    Tommy

    Dec 2015
    Ann Arbor
    AT MAX
    12,945
    14079 times
    All Types Of Treasure Hunting
    Honorable Mentions (2)
    Talk to Nel tech or Garrett teck I have the nel attack and the garrett 5x8 you will lose depth on dime size targets absolutely. They are great for quarter and larger and relic hunting
    Approved TreasureNet Stickers
    .:: $4.00 for 11" X 3" Bumper Sticker ::.
    .:: $2.50 for 1" x 4" Detector Sticker ::.
    (Free Shipping)


    SEE: TreasureNet Bumper Stickers

  10. #10

    May 2005
    829
    93 times
    Quote Originally Posted by A2coins View Post
    Talk to Nel tech or Garrett teck I have the nel attack and the garrett 5x8 you will lose depth on dime size targets absolutely. They are great for quarter and larger and relic hunting
    My 13" Detech Ultimate coil for AT Pro beeps on a dime with all high tones at 13" in an air test, which is 3" more than stock coil. In ground it can often go deeper than stock coil as well. My 15" Mars Goliath coil air tests with high tones on dime at 12". My NEL Thunder 10.5x14.5 air tests on a dime at 11.5", again better than stock coil. In extremely trashy areas, smaller coils may provide more coins due to separation, despite less depth.
    A2coins likes this.

  11. #11
    Charter Member
    us
    Tommy

    Dec 2015
    Ann Arbor
    AT MAX
    12,945
    14079 times
    All Types Of Treasure Hunting
    Honorable Mentions (2)
    air tests make no sense you have to account for mineralization ect your coil defies logic Awesome
    Approved TreasureNet Stickers
    .:: $4.00 for 11" X 3" Bumper Sticker ::.
    .:: $2.50 for 1" x 4" Detector Sticker ::.
    (Free Shipping)


    SEE: TreasureNet Bumper Stickers

  12. #12
    us
    Nov 2016
    Tucson, AZ
    Tesoro Vaquero
    154
    221 times
    Metal Detecting
    I don't know if a small coil helps with really small targets like tiny gold flakes. But I can tell you that my Tesoro 11x8 DD has no problem hitting pieces of can slaw the size of an office hole punch.
    Kace likes this.

  13. #13
    ink
    ink is offline

    Mar 2018
    158
    47 times
    All Types Of Treasure Hunting
    Why would you take a 12 inch double D coil into a junkard when searching for a lost class ring ??

  14. #14
    us
    Dec 2012
    lower hudson valley, N.Y.
    safari, ATPro, infinium, old Garrett BFO, Excal, Nox 800
    2,394
    2300 times
    All Types Of Treasure Hunting
    In GENERAL, a concentric coil of the same diameter of a DD coil will penetrate deeper although the deepest part will be much smaller than the deepest edge of the DD. In GENERAL, a larger coil will go deeper but will lose sensitivity to smaller targets and a smaller coil will provide better separation and better sensitivity to smaller targets. Been this way from the git-go and will likely never change. A2, my 8" coil on my safari has no problem with dimes or reales at 10+ inches, I seriously doubt the 8x5 Garrett won't see dimes well, dimes are actually fairly large targets. I have banged silver dimes to 8" with my ATP and 8x5 coil. Depth is often overrated anyways, in forty plus years of hunting many of my coins have come at 8" or less and most at 6" or less.
    Ya won't find nuthin' if ya don't hunt

 

 

Remove Ads

Sponsored Links

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  

Similar Threads

  1. [SOLD] FS/FT Whites V3I Detector W/2 Coils ($775)
    By DAVID@RT6DETECTORS in forum Treasure Related Stuff For Sale
    Replies: 0
    Last Post: Aug 14, 2018, 09:41 AM
  2. [FOR SALE] 6 WHITES METAL DETECTOR COILS FOR THE DFX, MXT, M6 2 COILS ARE V-RATED
    By POPPA in forum Treasure Related Stuff For Sale
    Replies: 0
    Last Post: Jan 28, 2016, 10:25 AM
  3. 1 TESORO Detector , 2 coils for sale Price reduction !!!! Coils are sold
    By freddy williams in forum Treasure Related Stuff For Sale
    Replies: 12
    Last Post: Jan 09, 2012, 10:12 PM
  4. Replies: 6
    Last Post: Aug 29, 2008, 11:10 PM
  5. How many coils do you have for your detector?
    By jocap in forum The Voting Booth
    Replies: 13
    Last Post: Jul 17, 2007, 10:29 AM
Powered by vBadvanced CMPS v4.3.0