Lots of Iron signals

[machineman]

I have had the XT 705 for about a month now. I have used it in many situations like parks, nugget shooting, ghost towns, and open woodland. It seems that almost everywhere I go I get a huge number of iron signals. So much so that I have trouble getting any consistant sweeps. I have mostly used the 10.5" and 6" HF DD coils and the 9" MF stock coil. I have speent some time in some old ghost towns that should be really productive but I can hardly find anything amoungst the iron signals. Is there a way to pick out the better signals. One of these towns is so bad that I cant even find a bare patch of ground to GB the detector. In a tipical sweep I will get an iron signal every 2"-3". When I went nuggget shooting I was having the same problem with iron signals and hot rocks. When in normal mode iron signals every foot and in prospecting mode I cant tell whats a hot rock, nail or nugget. Granted I didnt find any gold to really tell the difference but I couldnt work very long with so much falsing. I am getting pretty discoraged with this detector but will give it more time to see it I can learn it. Beach is my next try. Could there be something wrong with my XT?

 

[mapper65]

You may want to try and notch out your two bottom numbers. I pretty much run with an open pattern except I notch out -8, -6 and +48. Having the -8 & -6 notched out will probably help you. I would also be sure that you are properly ground balancing if you haven't yet mastered that.

 

[T.A.L.LasVegas]

A coil cover with dirt trapped between the coil and cover can cause the same issue you are describing.

HH Todd

 

[fsuhunter]

Have you tried lowering your sensitivity?

 

[machineman]

I have lowered the sensitivity and the coils are new still same problem. I may not have lowered the sens enough. What do most of you run for sens? Also when the 705 falses from high sens does it make iron sounds?

 

[fsuhunter]

When I am beach hunting in Florida, I sometimes need to lower sensitivity to 15. When my detector falses, I usually get readings of 2, 4 and sometimes in iron range.

 

[mapper65]

90% of the time my sensitivity is at 30. There are occasions that noise or ground conditions cause me to lower it.

 

[EOS]

My XT 705 falses a lot compared to the Etrac.Had problem with my 10.5 MF it could start chattering and there was no end to it.
That was because lose wiring.But minelab Ireland replaced it with a new coil in less then a week,very good service indeed.

I have a ground I just cant use the 10.5 even the new one.But my 12x13 Ukraine coil works fine on the same spot,so does the WOT.Believe me,I have tried everything from lowering the sens,doing a new noice cancel..etc..but It wont work without massive
falsing. I never use discrimination on my Terra since I know I will miss a lot of good stuff.

I run the sens as high as possible,usually between 27-30 depending on ground of course.In infested areas I lower it with good result.

Good luck with your XT, if you think its a pain try a Etrac,much more stable with very little falsing.

Mike

 

[Digger]

First thought was too high of Sensitivity. Second thought was a proper Noise Cancel. Third thought was improper ground balance setting. So turn it on and use the Auto NC. Lower the Sensitivity to single digits. Do a proper Ground Balance. Raise the Sensitivity up until it starts to chatter with the coil held on the ground.....then lower it two clicks. But then I wondered if you have already done all that??? So then I'd say.....If the signals are false signals and the unit is as you described, something is wrong. Time to take it back to the dealer or send it to Minelab. On the other hand, if the tones are from iron targets every few inches, then the metal detector is doing what it is suppose to do....detecting metal. If that is the case, you can reject those notch segments and get a nulling sound instead of the target tones. But realize that rejecting targets does not keep the detector from detecting them, only providing the audio response. When the X-705 is working as it should, you won't find a better "all around detector" for parks, nugget shooting, ghost towns, and open woodlands. JMHO HH Randy

 

[ronhob]

Maybe try 2 tones once. You can sure pick out a good signal in the iron with this method. Slow way down as well and use your 6" DD. I would also turn down the sens. if your still getting falsing. If you still can't find some good stuff, I'd say something's wrong with it!

 

[machineman]

I think the detector is working correctly. The worst area I described had nails in every hole I dug. I did find a few non iron items but they tended to be surrounded by iron. How can I tell if the detector is falsing? Other than digging every target. The iron signals aren't really the problem its the iron with high tones that make it hard. I commonly dig bottle caps that ring up around 24. I have taken to double checking every high tone that I hear but that makes it hard to cover any ground. Thanks for the advice, I will keep trying.

 

[Digger]

If you hit nails in every hole you dig, the tones are nails, not falsing. To reduce the effects of the "wrap around" iron signals, which can produce an irratic high tone, try rejecting out notch segments -8 and +48. The small 6-inch DD coil is your best bet for those type of sites as it provides the smallest "footprint". Sounds like all the places you are hunting is loaded with highly ferrous targets. To determine if your detector falses all the time, you'll have to find a place where there are no targets around. HH Randy

 

[tonopahkid]

I think i would make sure all negative number were notched out whne using it ,ive never had a problem with my x70 do to falsing .

 

[machineman]

Thanks for the help. I think that its just alot of iron in these areas. If i lower the sens a little it helps. I am getting gb numbers in the 60s which is weird. If I did a gb on a nail would this cause a high or a low gb number? I might try to see.