Sensitivity and big iron.

[NH Bob]

I have noticed this with most machines but more so with the XT70 and the 10.5" DD coil.
While hunting with Ron yesterday I had hit one of my so called Blips and upon going back over it I found the perfect example of a deep coin signal to share with Ron. As we were at the hole Ron was standing about 2-3 feet from me but with his iron shovel on the ground in front of him. When I went to swing over the target it was gone. By this I mean the target was totally masked by his shovel and as soon as I asked him to move it the tone of the target came back. I thought nothing of it at the time as I've dealt with this before. But thought it would be helpful to someone else.
Even in All Metal and more so with a high sen. setting and the larger DD coil you can walk right over a good target if it's near iron without even knowing its there. So when you get that nice signal and it comes in at one angle only and you lose it by turning 90* think about what I have just shared with you and relocate that good signal and dig it. Above all if you have your own shovel too close the same thing can happen.
Be aware of whats around you because your machine and the coil you use will also pick up metal at a fair distance to the sides.

 

[crow-duck]

Bob,I found that out a while back.It was wet out side so I got a old pair of boots out and didnt think they had steel toes,what a nightmare.I was reading about ground balance on the net and I read that if you ground balance with the tone higher on the down stroke you get better depth.Have you ever heard of this.
crowduck

 

[NH Bob]

Sort of like with the Shadow X5. When manually GBing set, once you've got it perfect then set it a 1/4 turn pos.

 

[RonNH]

That was a good example of how the field of the coil radiates out to the sides as well as above and below the coil. When I get a good hit one way on my swing, but not on the other way, I will circle the target and swing from all directions and try to get a better angle on things. It would be nice if all coins settled perfectly flat with no iron next to them and until that x-ray sonar machine comes out, this is what we have to contend with...coins on edge next to iron or other junk with that very occasional flat coin all by itself.

That's why I think Tone ID is so valuable, you can hear the different tones all in one sweep and I found out yesterday how quick the 70 recovers itself and changes tones when one target is right next to another. The struggle I had with the Explorer XS was the slow recovery speed, especially around iron infested cellar holes, even with the 8" coil. I'm not knocking the Explorer series, they have fantastic depth in the open but I thought it would take more patience than I had to hunt trashy spots.

I think the 70 is going to be much better around these spots and if the snow ever stops falling, I'll get a chance to check that out. Ron