Halo or not

I have always wondered why it is with some detectors that after getting a good coin signal/beep and digging down the sound goes away, then the coin will be in the hole a scoop or two deeper. I don't think it is a halo that gets broke and the signal gets lost because some detectors won't loose the signal/beep all the way down to the coin. Any reason why this happens.

I think it's the detector itself when you remove some of the soil your detector is seeing a different ground balance a void in the ground would be interesting to see what a detector ground balances at on solid ground compared to one with a void would it ground balance the same ?.Does the detector ground balance fast enough from the void to solid ground ?

As for halo not on my silver or copper in my ground take a zincet they corrode and do leave a halo .Does that halo enhance the signal no zincets come in at 12.37 on a CTX when corroded they come in at 12.33 to 12.35 so the halo made it worse now iron you can't loose the signal low tone for iron still there no matter the amount of dirt removed .sube



Edited 1 time(s). Last edit at 06/30/2019 02:00AM by sube.

sube Wrote:
-------------------------------------------------------
> I think it's the detector itself when you remove s
> ome of the soil your detector is seeing a differen
> t ground balance a void in the ground would be int
> eresting to see what a detector ground balances at
> on solid ground compared to one with a void would
> it ground balance the same ?.Does the detector gro
> und balance fast enough from the void to solid gro
> und ?
>
> As for halo not on my silver or copper in my groun
> d take a zincet they corrode and do leave a halo .
> Does that halo enhance the signal no zincets come
> in at 12.37 on a CTX when corroded they come in at
> 12.33 to 12.35 so the halo made it worse now iron
> you can't loose the signal low tone for iron still
> there no matter the amount of dirt removed .sube

Thanks sube, I was thinking that ground balance had alot to do with it. On my next hunt I will do some experimenting changing the ground balance to see what if any difference it makes.

.



Edited 2 time(s). Last edit at 06/30/2019 04:50AM by Badger in NH.

Dave Johnson on the Halo effect [www.fisherlab.com]

DeepTech Vista X with 3 search coils.
Works for me

Sven1 Wrote:
-------------------------------------------------------
> Dave Johnson on the Halo effect [www.fisher]
> lab.com/hobby/davejohnson/HaloEffect.pdf

Thanks Sven

I’d say it’s GB as well. A friend had a Garrett GTP1350 and it would false over voids or if he lifted the coil at the end of swings. Wanna hear an ODD one? I SWEAR that if I recover a coin, fill in and stomp down the plug and swing over it again?....my CTX will more times than not BEEP ONCE as if it’s recalling the ground matrix, and then it realizes the target is missing. It only ever beeps once over the exact spot the coin came from. Sound crazy? It is. I’ve seen it happen MANY MANY times and will try to get it on video. It shouldn’t be that tough.
Anyhoo....remember, the TX and RX signal no longer have a medium through which to travel, so the “open hole syndrome” may be essentially a GB issue OR signal degradation due to the lack of dirt.

SkiWhiz Wrote:
-------------------------------------------------------
> I have always wondered why it is with some detecto
> rs that after getting a good coin signal/beep and
> digging down the sound goes away, then the coin wi
> ll be in the hole a scoop or two deeper. I don't t
> hink it is a halo that gets broke and the signal g
> ets lost because some detectors won't loose the si
> gnal/beep all the way down to the coin. Any reason
> why this happens.


Good question here.
Beginner detectorist especially should read here.
Will indeed save them some time in the field recovering targets.

I find not all detectors act the same on all similar scenarios.
Do I know the reason? Not exactly. But even not knowing the reason for a VLF detectors behavior as long as I am aware of what’s happening I can take measures in the field and hopefully make recoveries and make them faster.

I’ll talk about Minelab Equinox here. I am very familiar with its different possible behaviors. And even though I am talking about EQX detector here, some of what I am going to say can apply to other VLF detectors.

First you locate a target using EQx, defintley wihout question tonal wise a nonferous target.
You start digging.
You decide to check and see if your find is out in the plug (on top of the ground) or is it still buried.
If using disc like you used when you located.
You indeed may not hear the target in the plug ( on top of the ground) or even in the hole still buried. This may confuse a user.
So what to do?
Go all metal and sweep plug. If no audio good chance it is still buried or in the hole still.
You may or may not get tone even using all metal using EQX when sweeping area of hole with target still in the hole.

Now, and I have gotten tied up in knots at times. Might be a good idea to flip plug and again sweep using EQX with AM engaged. Just to double check before digging deeper in hole. (Especially on lower single digits ID reading targets when they are located).

Remember using disc and sweeping plug. You indeed may have rearranged to the detector possible masker(s) like iron so detector can’t give signal using disc.

Disturbed dirt too can alter how the detector responds.

Where you put the plug, remember this area could be contaminated with either ferrous or even nonferous (could be small too), and this could confuse detector and not let you hear your supposed target located yet it is indeed in the plug.

Use of pinpoint can be used to try and see if target is still buried with dirt already removed from hole. Again you may get different results tone wise even if find is indeed still there and buried.

Here is some thing interesting to note.
And EQX is sorta of unusual here with this. A user can sweep, they can use pinpoint and try maybe to figure out which side of hole the target is locate by tilting coil or just moving coil over some trying to isolate where the target is suspecting younthe detectorist may have missed the target digging. Well when you do this don’t be surprised to indeed be fooled. For whatever reason the target may be on the actual reverse side of where you think it is based on tone gotten where coil was indeed located. Sometimes a thinner find can cause this. Sometimes a nail vertical can cause this (granted this is not declared a good target) but user may get tone leaning more towards good target.

So, basically with experience using any mode VLF detector, one will have to develop their own regiment for using whatever they can to recover targets. Speed does matter in the long haul too. Got to get the target out so you can go find another.

Hunting more polluted sites can definitely be more challenging recovering targets after being located. I recommend good quality pinpointer.

Last here.
Based on my experiences, there is a very good chance folks have indeed left good finds in the ground even after being successfully located. These folks were not fooled. But later on these same folks were fooled in one way or another hence they declared later on they were fooled and walk. And later on another person finds the actual target left by previous detectorist.

It pays to have confidence in your detector skills once you develop. Don’t let one nail drive you away from further digging/exploration necessarily. You just might be leaving your find of a lifetime behind.

Cheers.



Edited 5 time(s). Last edit at 07/01/2019 02:05AM by tnsharpshooter.

tnsharpshooter Wrote:
-------------------------------------------------------
> SkiWhiz Wrote:
> --------------------------------------------------
> -----
> > I have always wondered why it is with some detec
> to
> > rs that after getting a good coin signal/beep an
> d
> > digging down the sound goes away, then the coin
> wi
> > ll be in the hole a scoop or two deeper. I don't
> t
> > hink it is a halo that gets broke and the signal
> g
> > ets lost because some detectors won't loose the
> si
> > gnal/beep all the way down to the coin. Any reas
> on
> > why this happens.
>
>
> Good question here.
> Beginner detectorist especially should read here.
> Will indeed save them some time in the field recov
> ering targets.
>
> I find not all detectors act the same on all simil
> ar scenarios.
> Do I know the reason? Not exactly. But even not k
> nowing the reason for a VLF detectors behavior as
> long as I am aware of what’s happening I can take
> measures in the field and hopefully make recoverie
> s and make them faster.
>
> I’ll talk about Minelab Equinox here. I am very f
> amiliar with its different possible behaviors. An
> d even though I am talking about EQX detector here
> , some of what I am going to say can apply to othe
> r VLF detectors.
>
> First you locate a target using EQx, defintley wih
> out question tonal wise a nonferous target.
> You start digging.
> You decide to check and see if your find is out in
> the plug (on top of the ground) or is it still bur
> ied.
> If using disc like you used when you located.
> You indeed may not hear the target in the plug ( o
> n top of the ground) or even in the hole still bur
> ied. This may confuse a user.
> So what to do?
> Go all metal and sweep plug. If no audio good cha
> nce it is still buried or in the hole still.
> You may or may not get tone even using all metal u
> sing EQX when sweeping area of hole with target st
> ill in the hole.
>
> Now, and I have gotten tied up in knots at times.
> Might be a good idea to flip plug and again sweep
> using EQX with AM engaged. Just to double check be
> fore digging deeper in hole. (Especially on low
> er single digits ID reading targets when they are
> located).
>
> Remember using disc and sweeping plug. You indeed
> may have rearranged to the detector possible maske
> r(s) like iron so detector can’t give signal using
> disc.
>
> Disturbed dirt too can alter how the detector resp
> onds.
>
> Where you put the plug, remember this area could b
> e contaminated with either ferrous or even nonfero
> us (could be small too), and this could confuse de
> tector and not let you hear your supposed target l
> ocated yet it is indeed in the plug.
>
> Use of pinpoint can be used to try and see if targ
> et is still buried with dirt already removed from
> hole. Again you may get different results tone wi
> se even if find is indeed still there and buried.
>
> Here is some thing interesting to note.
> And EQX is sorta of unusual here with this. A use
> r can sweep, they can use pinpoint and try maybe t
> o figure out which side of hole the target is loca
> te by tilting coil or just moving coil over some t
> rying to isolate where the target is suspecting yo
> unthe detectorist may have missed the target diggi
> ng. Well when you do this don’t be surprised to i
> ndeed be fooled. For whatever reason the target m
> ay be on the actual reverse side of where you thin
> k it is based on tone gotten where coil was indeed
> located. Sometimes a thinner find can cause this.
> Sometimes a nail vertical can cause this (granted
> this is not declared a good target) but user may g
> et tone leaning more towards good target.
>
> So, basically with experience using any mode VLF d
> etector, one will have to develop their own regime
> nt for using whatever they can to recover targets.
> Speed does matter in the long haul too. Got to ge
> t the target out so you can go find another.
>
> Hunting more polluted sites can definitely be more
> challenging recovering targets after being located
> . I recommend good quality pinpointer.
>
> Last here.
> Based on my experiences, there is a very good chan
> ce folks have indeed left good finds in the ground
> even after being successfully located. These folk
> s were not fooled. But later on these same folks
> were fooled in one way or another hence they decla
> red later on they were fooled and walk. And later
> on another person finds the actual target left by
> previous detectorist.
>
> It pays to have confidence in your detector skills
> once you develop. Don’t let one nail drive you aw
> ay from further digging/exploration necessarily.
> You just might be leaving your find of a lifetime
> behind.
>
> Cheers.


Thanks tnsharpshooter, very informative.

IDX --

You are exactly right. My Equinox will do that, too...

No doubt about it, you are correct.

Steve

I guess I'd like to believe in the halo effect as fresh buried items usually won't ring up as deep as wild coins will. Around here anyways.
Almost all wheaties and most Indians come out with a florescent green goo on and around them. My answer Ski is,,, I dunno?

steveg Wrote:
-------------------------------------------------------
> IDX --
>
> You are exactly right. My Equinox will do that, t
> oo...
>
> No doubt about it, you are correct.
>
> Steve

Steve...I thought I was nuts when it happened way back when, then it kept doing it on a pretty consistent basis. Not ALWAYS, but very frequently. I wonder if this behavior might give us some insight into the way these machines are doing their processing? It just goes to show(whether it means a hill of beans or not) that if you pay close attention to detail, you start to see some weird stuff happening! And this is indeed weird...