Discrimination questions

[canslaw]

Good morning Gents

So as a new deus user I have been paying close attention to the program settings that people are using and I am wondering, If the deus can discriminate to 100, why do I never see anyone go over 10? Why not go up to 30-40 and drop all the iron and most of the foil?

I imagine the reason is lost depth. If so, just how much depth are you losing past discrim 10?

Thanks

 

[CT Todd]

Depth is the issue. I don't remember the chart exactly but detection depth was basically flat up until 10 discrim and then greatly affected after that on a downward curve. One of the beauty's of the Deus is the adjustable notch which can be used in place of discrim. Notch only removes the audio from the speakers and has no effect on the depth of the unit.
So possible setting would be discrimination set to 8 and notch out 9-30 same effect as your question but no loss of detection depth.

 

[squirrel1]

Instead of disc and notch use your tone breaks. For example use 3 tone, a disc of say 6.8. Your first break will be a 6.8. You then have capability for 2 more tones and one break. Say you are only after old wheats and silver Using 3 tone set your first 2 tone areas to the lowest tone. At breakpoint of say 72 put the tone to the highest tone setting. Most tabs and junk will ring as a low tone, the silver will ring in high. You will get more depth. Only drawback besides loosing nickels and gold is the machine will give a tone for all targets. Running a big notch will make the machine quieter yielding less depth. It's your call. Both will work and both have advantages and disadvantages. With faster coil sweeps the notch may be better since with rapid coil sweeps your ole noggin has to sort out the high tones. Good luck.

 

[CZconnoisseur]

In some of the worst trashy areas I've notched 00-65 and 90-99 in 4khz, with 00-78 and 97-99 in 12 khz. I still dig 6-8" coins occasionally with these settings, but this program is generally for coins 6" or less. Disc is always set at 2.0 - This is what I would use if only after Wheats, Indians, and silver (no nickels)

Coop's 4 khz bottlecap program uses a Disc = 20 (twenty) and a Reactivity = 3. This is a stellar program for picnic areas and some inner-city sites where the malt liquor and grape drank like to flow, however, don't expect to get many coins past 6". He sets it up in a particular order and has a great video demonstrating how it works here:

https://www.youtube.com/watch?v=OzjVyki6qus

There are other threads elsewhere that discuss raising Disc vs max depth, notably this one:

http://www.findmall.com/read.php?83,1676004

HenrikR made an outstanding and easy-to-understand video about silencer settings and proper GB techniques here:

https://www.youtube.com/watch?v=kjuANf3J3yg

Hope this helps!!!

 

[CT Todd]

Instead of disc and notch use your tone breaks. For example use 3 tone, a disc of say 6.8. Your first break will be a 6.8. You then have capability for 2 more tones and one break. Say you are only after old wheats and silver Using 3 tone set your first 2 tone areas to the lowest tone. At breakpoint of say 72 put the tone to the highest tone setting. Most tabs and junk will ring as a low tone, the silver will ring in high. You will get more depth. Only drawback besides loosing nickels and gold is the machine will give a tone for all targets. Running a big notch will make the machine quieter yielding less depth. It's your call. Both will work and both have advantages and disadvantages. With faster coil sweeps the notch may be better since with rapid coil sweeps your ole noggin has to sort out the high tones. Good luck.

I'm wondering why you think the use of notch will affect depth in any way? plus or minus. If you have set the notch to any range say 10-30 you simply will not hear the targets that fall in that range which by setting it this way means already that you are not concerned with targets in that range. You have lost nothing but noise. The coil of the Deus still sees every target under it . It simply doesn't make a sound for the ranges that are Notched out. Nothing more.

I personally like to listen to everything and don't set up the way I've mentioned but a lot of detectorists don't like to deal with the chatter. To each their own. HH

 

[XP-Man]

Check out my post i just posted

I run high Disc and im digging coins 8 to 9 inches eno problem
Reactitvity 3
Sielencer -1

 

[squirrel1]

So notch doesn't affect depth?? My machine airtest at greater distances with no notch versus notch. The same can be said of disc as well. Soil quality has effects too. In bad soil I would say my machine will get deeper with less disc and less notch. This doesn't mean one can't find coins with high disc or a lot of notch. In good sweet ground especially. Are any 9-10 inch coins being dug with high disc or high notch using the 11" coil???

 

[CT Todd]

All I can say is that I got this info at the Deus Boot Camp and by reading Andy's book. Notch is audio only and discrim is fine up to 10 but has an ever increasing effect on detection depth from 10 onward. Air tests are not real world. Look at Minelabs they never air test worth beans but they detect undisturbed ground very deep. I'm a long term minelab guy who now has a CTX and a Deus. I read everything about anything I swing. The Deus is a very smart machine.

 

[JFlynn]

Yep notch just removes the audio, disc is more involved. Notch is the way to go.

 

[canslaw]

Thanks for all the advice. I will give notch a try and see how I do.