Minelab Equinox Tips: Week 12: “Recognizing Iron or Junk by How the Meter Climbs”

The Equinox’s sophisticated electronics will give you a lot of information about what type of signal is under the coil—if you know what to look for. This involves working with the coil, signal tone and meter together.  For example the two major signal types are ferrous and non-ferrous. When you get a signal—try and get a fix on it’s exact location. This might involve going into pinpoint for a second and checking to see if the target has a wide, drawn out sound (iron or large target) or a narrow sharp one (non-ferrous) . While this is a very basic skill with any detector, try this trick. Move the coil off to one side slightly then do a few short, even passes over the target getting narrower with each swing. If the meter stays consistent or climbs to within the “coin” range (under say “34)” it’s worth investigating. However, if the meter “stacks” and builds up into the “wraparound” range with more coil passes, you have iron, steel, corroded metal or something that’s too big for the machine to classify. This is because, just as with our “wide / narrow” test, the machine does not “let go” of the signal as readily as it would with something non-ferrous and coin sized. I use this to determine the signal quality of targets by seeing how they connect to the ground. Anything magnetic or too big (like wire) will climb way up  whereas a small non ferrous target will stay down within a lower range. This connection between the ground and target reveals a lot. While there may be iron up in close to the non-ferrous target, the exact reporting of the Equinox does make this distinction with multiple coil passes.  With faint or deep targets look for which response type dominates–good-range or “wrap.”  If you are looking for brass or copper relics–these are more likely to be corroded targets that are “blended” with the grounds signal– responding up into the “30’s”.  It’s also important to get a “feel” for how far to one side you are moving the coil off to make this “climbs way- up-or-not” call.  I use this same genral principle searching for gold in the water.  I put in a  coin range reject block from 24 to 28 and then use the coil and audio to see if something is hitting up against this range–not gold. For more Minelab Equinox Tips, Settings and Tricks check out by blog and site at: clivesgoldpage.com

“As a gold-hunter I focus on signals that are within a certain range.  Nothing in this picture hit above “23” on the meter. ” cjc