ACE 250 signal jumping to iron.

[Fabio]

I couldn't find any related post so:
I have an ACE 250 with an original coil, using rechargeables or normal batteries, and sensitivity two notches off maximum.
Question:
Why do many targets show off at a higher (not iron) range and then on the next sways go down to iron?

Power supply is okay and the wire going to the coil leaves 20 cm straight up from the coil.

Any theories?
Anyone else have the same results?
The objects found are usually junk, but the jumping signals annoy me a bit...

 

[Orion42]

Rusty iron will often ping off as a good target. Just part of the game and no way around it.

John

 

[NM5K]

Yep. Rusty iron is the #1 culprit. The rust is more highly conductive than the fairly low conductivity of
the iron. So it will hit on both like they are two targets. Old bottle caps will do that if they get rusty.
And nails on the sides of houses can be a pain if they rust. Most old ones are.
Coins won't bounce around like that. They stay stable on the ID. So if one is after coins only and no
relics, ignore the bouncers.
But myself, I pretty much dig everything.. I always worry I might be leaving something interesting..
But if I'm on the side of a house with a re-roof nail bonanza, I'll ignore a lot of those if they all hit
the same. I just go by sense of smell..

 

[slingshot]

Turn sensitivity, as Mr. Bill suggested whenever he was here and see what happens.

 

[Fabio]

One thing I noticed, when over a bunch of signals in a trashy area, lifting up the detector about 30 cm (foot) over the ground, the best signals remain strong. (sort of like lowering the sensitivity as some say, I keep my sensitivity at two notches less than maximum, mainly because I haven't noticed much of a difference changing that level, except for on the wet beach).

 

[slingshot]

One thing I noticed, when over a bunch of signals in a trashy area, lifting up the detector about 30 cm (foot) over the ground, the best signals remain strong. (sort of like lowering the sensitivity as some say, I keep my sensitivity at two notches less than maximum, mainly because I haven't noticed much of a difference changing that level, except for on the wet beach).

I left out "to 4 bars" on my post-sorry for that. I found a quarter in my area at 7" with it set exactly where you hunt. After considering Mr. Bill's posts, I lowered it to 4 bars and the same signal was still there, loud and strong, only clearer! I guess the best way to explain it is that the ground minerals block the higher energy signals by overreacting, and the lower energy signals aren't hindered as much. And the 4 bars setting kinda is the best of both worlds. But that's just my area-and beleive me, there is some iron here in East Texas!~

 

[Fabio]

Okay, next time I'll try the 4 bars sensitivity and see how it reacts, especially with foil. We have lots of foil in these woods...
Foil gives a choppy jumping signal between iron foil and 5 cents, while a gold chain also gives a choppy signal but it's a fixed signal, not jumping.