Question about threshold on E-trac

[denny2w]

Often I get nulls right next to a good target sound, numbers jumping.

What is most likely?

1) Two targets one iron the other good.

or

2) An iron target acting as a good target.

Is this a "got to dig"

[Full Metal Digger]

Nulls are definitely iron. Squeaky nulls are usually iron falsing. The dilemma is what if its a coin next to a nail???? When you get a squeaky null, pinpoint the target and then turn the coil 90 degrees and see if the squeaky spot moves an inch or so. Also the numbers will jump from say 12-45 to 16-45 (or so). Next consider the depth. A coin at 6 or 7 inches will usually SCREAM "Here I am!" A lot of those squeaky nulls will be 4 to 6 inches deep. I usually skip those signals. After I dug about 100 nails I caught on that there is no coin even though it sounds like one (sorta).

[denny2w]

Thanks Dave that makes sense. The ones I'm hearing are shallow.

[coinnut]

When you get that null, switch screens to a completely open one. The null should turn to a grunt (iron). Like Dave said, the hardest ones are the nails that false a high tone. Makes you really want to dig them. :lol: But I suggest trying to guess what the target is going to be and then digging them to see if your correct. Do this until you get the difference between iron falsing and a real non ferrous target. One of the things I liked about the E Trac was that it could detect a non ferrous target while the iron next to it was nulling.

[Big Boys Hobbies]

When you get that null, switch screens to a completely open one. The null should turn to a grunt (iron). Like Dave said, the hardest ones are the nails that false a high tone. Makes you really want to dig them. :lol: But I suggest trying to guess what the target is going to be and then digging them to see if your correct. Do this until you get the difference between iron falsing and a real non ferrous target. One of the things I liked about the E Trac was that it could detect a non ferrous target while the iron next to it was nulling.
Good post!