F70 in iron question

[KurtB]

I have had the F70 out hunting an old ghost town. Lots of iron as expected. The problem I'm having is all the false high tones. Rechecking so many wastes a ton of time. I started out with the sens. at 75, thresh. at 0, GB was low 70s. After awhile I lowered the thresh. to -3. Then lowered the sens. to 60 and below. All this time I was hunting with disc. at 1. When I raised it to 6 it helped a little bit with the falsing. With my Xterra 70 I can reject the highest notch and virtually eliminate all high iron falses. Wish that could be done with the F70. I have about 20 hrs. hunting time logged on the F70 and thought I had it figured out. Any advice would be appreciated.

Thanks.

Kurt

 

[tony (Orlando FL)]

Hi Kurt,

I have a few things you can try. For a while, use the default GB setting and see if this helps reduce some of the falsing iron from reading as high coin.

Back when I first got the f70 many months ago, I used to run the sens as high as I could stand it, sizzling hot but after a while I learned that even coins that were VERY DEEP could still be detected with the sens turned way low, even down into the 20s range. Next time out, when you locate a target which seems to be at a decent depth, say 8+ inches, reduce your sens to see how low you can actually go and still hear and ID the target. You may be very surprised.

When the sens is lower the ID capabilities are much more accurate in my experience.

You may also consider trying to use one or two tones to see how that works for you. I remember waiting for the smallest of hi tones to be heard within all the iron sounds but now, I use 1 tone which seems to tell me a whole lot more about the target than the multi tones did. I like 3h and 4h in areas that arent totally trashed and single tone for the worst spots on the planet. After I decide the target sounds good, I then check the meter and look at the DIRT graph and reliability scale and then decide to dig or not.

Only other thing I can suggest is that when you DO get a target hit, sample the target from all sides and listen close. If it has any hint of iron, it may just be iron

OH! One more tip and I use this very often....... when I get a hit that can be iron or high coin, I take my shovel or digger or probe and pierce the ground several time in the area of the target. IF the target remains, its more likely to be good. If it disappears, it was iron. Seems the high freq units really pic up on the iron halo and by breaking it up, you get a more accurate reading and sound.

If you try any of these, let us know if they worked for you.

Tony

 

[KurtB]

Thanks Tony, for your tips. I will try them. I too, noticed that when I would disturb some of the soil above the iron the detector would then discriminate it out. I am more careful when I get to target depth as to not turn a good target on it's side and loose it. Most of the false hits that I was talking about have a slightly different sound than a good target but there a quite a few times when they sound to darned good to pass up. I hate the thought of leaving an old coin lay next to a nail. One wonders how many times it actually happens.

Take care,

Kurt