Trashy park Nulling

[underwatermetalman]

Took it out this morning to a known trashy park which I have had problems with my Etrac. Had the same problem with the CTX there was so much nulling it made hunting difficult. I was able to pull some shallow targets through the null but nothing more than three inches. I used the standard coin program with trashy setting, deep off, fast recovery on, auto plus 2, target trace on. Anyone else having this problem? I thought about running the screen wide open but wanted to stay with the stock coin program.

 

[Digga03]

yes

 

[Gemini13]

I don't understand why people think this is a problem. Its a function of the machine. Minelab detectors null when you pass them over trash that is discriminated out. Best bet would be to reduce the threshold to low volume almost like a silent search. You will still here targets not discriminated out when the coil passes over them.

 

[earthmansurfer]

Exactly what Gemini said. If you don't want it to null then don't discriminate anything out. The less you disc the less it will null though. Run the combined mode and set the iron tone to a tone that is least intrusive. Hopefully they release an iron volume control in the future, then it will be much more comfy hunting in iron.

Albert

 

[mtwolf2270]

Where you running ferrous coin or high trash? Did you still see the iron targets on the screen? The ferrous coin and as you know a slower swing will see coins if they are there. My SE nulls as it is suppose to put it does not have the recovery or the seperation ability the CTX has. Today, I hunted a small area of a park here in town. That everyone who has a detector has hunted for the last 40 yrs. The park dates to about 1910. It is very trashy and full of iron as it is next to and old mill property. My SE could not hunt it; I pulled 6 coins all clad form this "avoided" area today stock coin sen auto+2 ferrous coin thershold just where I can hear it gain about 21.

 

[hershey1]

And slow down and let your pro-coil figure it out. You can hit your detect button one time in coin mode and it will go to open screen then when you decide if you are going to dig or not hit the detect button again and you will be back to your original screen. This will work in any mode. I did'nt see you mention this function in your post that is why I mentioned it. The machine has solved the problem for you. HH

 

[underwatermetalman]

I was running high trash, I guess I thought it would be much faster with less nulling than my Etrac. My Etrac could not hunt this site nor could I pull anything out. At least with the CTX I was able to pull some shallow targets. I did see the iron running across the screen. When I say this thing was nulling I mean that is all it did. When I did dig I was pulling old nails and some metal that I could not identify, I was moving so slow I couldn't have gone any slower. I was hoping for some deeper old coins in this site which I believe are still there.
I did not run open screen which I did think of but again I wanted to see what this machine could do in just stock coin compared to the Etrac, I would love to hit it again and try some different settings. This park goes back to the early 1900's


Just Curious as to what others have done and experienced.

Thanks for the replies.

HH

 

[Larry (IL)]

That sounds like a good place for the 6" coil......

 

[underwatermetalman]

I agree, perhaps six inch coil wide open screen

 

[mtwolf2270]

I would also try ferrous coin that was how I pulled that clad I know my park still has old coins I think with the right settings and getting to know her we will pull them out ! Good luck I hope you can tweak it and find the coins

 

[underwatermetalman]

Thank you!!! I failed to mention that it is in ferrous coin, I am committed to this machine and bought it just for these situations. I can see it is a better machine than the Etrac in terms of target separation and processor speed.I noticed even during the Nulls that it would still ring a shallow target as long as it was no deeper than three or so inches. Now I need to move to the next level and get to those old coins!!! I have a few similar trashy parks I want to hunt before the other CTX users get to them!

Any and all suggestions are appreciated, I will continue to post my experiences.

On the good side my machine has not shut off as of yet and I was out for over four hours this morning.

 

[Digger]

I used the standard coin program with trashy setting, deep off, fast recovery on, auto plus 2, target trace on.

I was running high trash, I guess I thought it would be much faster with less nulling than my Etrac.

I failed to mention that it is in ferrous coin,

If you were in the Standard Coin Search mode, you were running with High Trash Target Separation. In areas with an abundance of "nails", you'd be better served using Ferrous - Coin Target Separation. I would also recommend Fast ON to provide more separation of tones.
[attachment 235101 fastonoffchart.jpg]

As to the nulling.......adjusting the discrimination of the CTX 3030 does not change the fact that it will detect everything metal. What discrimination does is to provide a tone on targets that were set to Accept. And provide a null of the Threshold on targets that were set to Reject. As I said, the CTX 3030 "sees" all the targets. But it only provides tones as you have selected.

I noticed even during the Nulls that it would still ring a shallow target as long as it was no deeper than three or so inches.

There you go! If the coil can "see" a coin, you will hear the audio response of that coin. The most difficult part of metal detecting is putting the coil over a good target. Once you do that, the CTX 3030 will take care of letting you know it is there. HH Randy

 

[earthmansurfer]

Thank you!!! I failed to mention that it is in ferrous coin, I am committed to this machine and bought it just for these situations. I can see it is a better machine than the Etrac in terms of target separation and processor speed.I noticed even during the Nulls that it would still ring a shallow target as long as it was no deeper than three or so inches. Now I need to move to the next level and get to those old coins!!! I have a few similar trashy parks I want to hunt before the other CTX users get to them!

Any and all suggestions are appreciated, I will continue to post my experiences.

On the good side my machine has not shut off as of yet and I was out for over four hours this morning.

You need to be careful in ferrous coin regarding "nulling". Sometimes ferrous coin will give a visual but no sound (this is not to be confused with nulling).

On page 41 of the manual:

[size=large]NOTE
The Ferrous-Coin setting may not always provide audio.[/size]

So, you might want to watch the screen a bit when running ferrous coin. Since the above note is in the manual, I don't think it's exactly a bug ( but be careful considering most of us are tone hunters initially). Would be nice to get a sound with a target of course but perhaps ferrous is working in ways that complicates things. Hmmm...

Albert

 

[Digga03]

yes i read that and it is a worry to non screen watches seems over iron nulls i have seen the little target cross hairs show up with say 12-42 numbers showing up and then i remember the manual as quoted above and wonder what i need to do as it doesn't really explain itself or what should be done is it a coin with no audio associated its almost impossible to find a target that the screen is saying is there. via cross hairs and associated numbers eg 12-42 this always happens over iron nulls.

it is a little confusing do we try to find the noiseless target or is the manual wrong about whats showing on the screen ?

 

[earthmansurfer]

yes i read that and it is a worry to non screen watches seems over iron nulls i have seen the little target cross hairs show up with say 12-42 numbers showing up and then i remember the manual as quoted above and wonder what i need to do as it doesn't really explain itself or what should be done is it a coin with no audio associated its almost impossible to find a target that the screen is saying is there. via cross hairs and associated numbers eg 12-42 this always happens over iron nulls.

it is a little confusing do we try to find the noiseless target or is the manual wrong about whats showing on the screen ?

I agree with you, it is going to be hard to really know (but this is different than real sound nulling via running disc). Wonder how to pinpoint that as well and if target trace pinpoint might help? Lots of playing around is in order to get the most out of this.

My guess is just to dig a few to see how they respond in your ground.

Perhaps Minelab can eventually figure out a way to get audio consistently with the ferrous coin setting, as really, if you are hunting in iron and staring at the screen, your neck is going to cramp (but at least your back is ok from the perfect balane )

Albert

 

[markg]

All very intriguing

 

[underwatermetalman]

I noticed that too, a few times during a null I would see different numbers appearing but no audible sound so I did not dig them- they seemed inconsistent. When I did see the numbers with no sound I would work my coil slowly to see if it was a good target or not but then would lose the signal. I would then rotate around the target again checking for a consistant signal. This machine is going to take some time to learn. I am glad to see the number of responses, which, of course, is to all our benefit.

HH

Joe