Its about the threshold again!

[DFX-Gregg]

The park by my house holds a once a year giantic picnic. Last week I took the dfx there and hit over $12 in clad in less than three hours. I decided to cover the next area from the picnic today using the Se. But I also decided to drop the sensitivity quite a bit too. What I was looking for was a much more stable threshold, with less nulling and also the continued loss and recovery of the threshold itself. I dropped my sens. first to 17, than 19. Yes a stable threshold was created....again the learning phase for me continues. I was able to work much faster, my goal being surface clad early this morning before the four ball diamonds were taken up by the little leaguers. The results were very good, found $5.38 in clad in one and a half hours.

I was wondering how many of you are dropping your sensitivity to gain a stable threshold and do you feel you are losing depth. I usually run the sens. around 23.

 

[mattockman]

If you are looking for a stable threshold and still want to use a higher sensitivity there are 2 things you can do...1) turn off deep (2) Turn down gain to 6 or 7....this will let you keep your sens. up and give you stabler threshold. I have to do that at the beach to quiet down the falsing.

You will lose depth by turning sens. down but if you only want shallow clad it works....

 

[DFX-Gregg]

Thanks... For some reason the loss of threshold bothers me.... I am happy with the depth of the Se...but the constant nulling makes me wonder how many targets in between I am missing. I notice sometimes in extreme trash unless swinging very slow... I have to stop swinging and let the responses catch up and stop... Almost like I am a signal or two behind.

 

[RandyNorthridgeca]

In my opinoin you're goal should be to get as close to zero discrimination as you can. I do better when I can hear everything that's under my coil. All those tones will drive you nuts at first but over time you'll be able to kind of tune them out and just listen for the tones you want.

Open up that discrimination a little more so you get less nulling.

HH Randy

 

[DFX-Gregg]

n/t

 

[Larry (IL)]

On my XS, I have the Iron Mask at -15, one step above all metal and ferrous tone Gregg. I very seldom lose the threshold and I can listen to everything in the ground. I can't do that with the DFX without going bonkers, but with the XS all iron is a low tone and not at all objectionable for me. When I move the IM up, then the threshold starts going in and out. Give a very low IM a try with Ferrous tone and see if that helps.

 

[DFX-Gregg]

conduct.... Not sure I am ready for another tone change... Also when adjusting threshold I notice a change in the tones...higher stronger/louder response.... Kind of another change I am not sure I am ready for... almost missed a quarter around seven inches deep the other day...just the tone changes throw me off a little too.... I am trying not to look at display and go by tones like I do with dfx.... I am still adjusting in this area.

 

[Larry (IL)]

That is why I like the tones set where they are on mine Gregg. Threshold tone is maxed, threshold volume is one notch above silent, gain is 6, sensitivity is auto, tone is ferrous and IM -15, normal audio and smart screen. With this setup, iron is low tone, except rusty bottlecaps which is buried in the lower right hand corner on the smart screen. All quarters, silver coins, Indian heads, wheats, dimes and cents will be in the upper right hand corner with that unmistakable high tone of, "dig me". I rescued a 24 Merc this morning with the XS, it was right in the middle of iron but I could hear the iron grunts PLUS the high tone of silver.

 

[mattockman]

Larry is right for saying get in Ferrous sounds and Randy is right about get as close to NO discrim as possible....the nulling will be from discrim working correctly, listen to it all with no discrim. and your nulling will be just heavey trashy areas....got to give the detector time to respond....always adapt coil sizes to junk ratio....it will help in seperation....and add threshold....if a coin is there....especially silver...I truely believe the SE will see it.....stop trying to get them all and enjoy the day and silver...you try way to hard I feel.....I try too hard also but still can relax and find fun in just being out.....but you are getting the best of both worlds now are'nt ya!

 

[DFX-Gregg]

agree trying to match coil size to job... thought I closed the deal on the last coil I need...a smaller one....but dealing with some people on these forums is a joke.... Not always what it appears to be... People not always selling to the first offer...but once they accept the offer...they should go thru with the deal... I will not even bother mentioning names.... I like to try and get a very good price then set sites on the Se and dfx paying for it....but that is ok...another deal will come along... Hopefully much more honest people are involved...

 

[mattockman]

I read that gregg...I lost a deal the same way you did...i have found the smaller coils I like more when it comes to trash....I know for a fact the coil size makes a big diff. if you hear a coin or not....its a trade off, don't expect deep targets with small coils but also don't expect coins in trash with larger coils......I wish I had an extra smaller coil...I would sell it to ya......I want you to see the diff. in coil sizes..and hope you see what I see....the ML 7.5 is small but even that is too big at some palces so the 5 " is better.....just that small amount of diff. can get it to sound off in trash.....another way to get seperation if all you have is larger coils is to turn sens. down and get the shallower stuff....I use to do fine at 10-12 manual sens. and see alot more in trash...granted depth sucked but I had better threshold and seperation...and could see coins in iron trash

 

[DFX-Gregg]

I do have a great idea how the smaller coil works on the dfx.... Hopefully soon I will on the se..... As far as the dishonest members...they can deal with each other! The first guy that pulled a deal from under me would have been surprised how many negative responses back I received about him! The latest two goofs can deal with each other...

 

[Steve(MS)]

You are absolutely right Mattockman, that 5" coil will get stuff in trash that the bigger sized coils won't get but it has to be thick with trash, mainly iron is what I deal with. I will tell you a secret Gregg, with DD coils you must grid an area to get what is there, that is sweep going one direction and then sweep at a 90 degree angle from the first, dig some of those one angle hits, don't depend as much on the screen, listen to the tones and dig those that repeat and tell you they are something other than iron.. That works with the larger coils as well. This mainly applies to iron trashy areas but helps in the non-ferrous trash also.

 

[DFX-Gregg]

will do...I gridded an area, well actually a hill using those little metal utility flags using the dfx last year... I dug every signal. Not anything great but lots of clad, a few wheaties and a Kennedy half. Would like to take the Se on that hill one day after a good rain... Thanks for the info... Gregg.

 

[dewcon4414]

I normally only disc nails and crowncaps. That really opens up the sounds and normally will give me a threshold after i adjust it properly. Ive never really used auto sensitivity too much, but do set it as high as it will go just so it has the felexibility to properly adjust itsself. Steve, didnt you make a post somewhere saying that too many of us worry about getting a threshold? Ive found that i still get some pretty deep targets even without a threshold... but i sometimes have to raise my coil to get a threshold just so my screen will change and read properly on a target i think might be good. Gregg, are you using DEEP recovery. Have you ever set the DFX to 10 recovery? If so, you notice the tone is longer the lower you set the recovery the farther away from the target it sounds off. Like the DFX, it processes more data and uses differant filters.

 

[DFX-Gregg]

n/t