Possible Iron check method

[HighVDI]

Had the morning off today and hit a park ballfield. Pretty unproductive day in the field but I was playing around with some settings while getting suspected iron falsing. I have seen many suggesting a 10khz check on a suspected nail ect but today I tried a few different ones and 40khz was spot on iron signal while multi and 10khz were peeping out some fairly repeatable high tones. Just something I wanted to pass along to give a shot. Why not?

 

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[Truth]

Much appreciated tip I didn’t know that. Now do you think it would work with silver mixed in iron?

 

[Echoplex]

Which coil were you using and with update or pre-update?

 

[b3y0nd3r]

This would make perfect sense as higher frequencies hit well on low conductors.

 

[Rick K]

Your must surely be mistaken. Everybody knows that the Box obseldted all single frequency dedicators - including a Nox at 40 kHz single freq.! lol

 

[HighVDI]

Your must surely be mistaken. Everybody knows that the Box obseldted all single frequency dedicators - including a Nox at 40 kHz single freq.! lol

Lol!

 

[HighVDI]

Which coil were you using and with update or pre-update?

Stock coil WITH update.

 

[HighVDI]

Much appreciated tip I didn’t know that. Now do you think it would work with silver mixed in iron?

I honestly don't know but I played around with 5khz and the VDI's were completely different than multi for various items.

 

[nagant]

I did the same today but tried 5 khz and it worked for a couple dime targets i tried it on. I thought lower khz is better on silver.

 

[sgoss66]

FASCINATING finding, HighVDI. I am going to play with this next time I am out, and I hit a few targets that are hovering, in my mind, somewhere between "likely iron false" and "possible coin mixed in with iron."

Steve

 

[sprailroad]

OK just so I understand, while detecting in say Field 2, multi tone, if I suspect more iron than not, meaning a little high pitch along with iron tone, I can change to 40Khz to perhaps check for certain, or pretty certain, but my real question is when I return to multi tone, I do NOT need to re- do noise cancel or another ground balance? which would be swell. If I seem a little dull minded in getting this, well...….but I do get some helpful tips from you fella's on the EQ.

 

[vferrari]

No, you dont have to redo all the noise cancel/GB. The best way to set it up is to put the single frequency program in the User Profile slot (if you have an 800) so you can easily switch to it while interrogating a target.

 

[HighVDI]

I was just wondering if anyone has tried this. Any feedback?

 

[67GTA]

Was able to get mine out today at an iron infested site. I am very impressed with this machine. "Hunted it out" with AT Pro and 5x8 coil. Nox pulled lots of targets out of the iron. Had about 10 holes with square nails that still gave chirps in the 20's with multi and iron bias 3. Switching to 40khz caused the VDI numbers to drop somewhere between 11 and 1. I also noticed that most big iron showed up 15-16 and always pinpointed about 12" from where I was getting the signal. Halo I guess?