Does anyone use notch

[DirtAngler]

Most, if not all, posts I see on setting up adjustments do not use the notch feature. Does anyone use it and if so, how and when? I'm familiar with notching on my Xterra 705 but there you can notch just a single setting on the scale.

 

[pescadore]

I have a US Coin program set up and I use the notch feature to eliminate trash but I only use it in extreme cases when the trash is driving me crazy from all the noise. I almost always hunt in 12 Khz with very little discrimination. My coin program setup is as follows.
Discrimination 50
Sensitivity usually around 94-95
Iron Volume 2
Reactivity 3
Audio Resp 4
N1 97-99
N2 56-76
4 Tones
tone 1 200 (0-50) discrimination level
tone 2 791 (this is the window left for nickels 50-55)
tone 3 644 (56 - 84) tone for zinc pennys up to copper pennys
tone 4 791 (85-99 coins above zinc penny)

Like I said, I only use it in really trashy parks, etc. and I slow my swing down a little (but not a lot) to avoid as much masking as possible. The Deus is so fast that the program seems to work pretty well. I am sure that I am giving up a little depth but maybe picking up a little sanity by avoiding all the noise for a while. It may not be for everyone but it works for me. I hunt primarily for coins which are my preferred finds and don't usually dig tab signals anyway so I realize that I am giving up a lot of gold rings and I am okay with that. In a lot of the places I hunt the whole place is covered with pulltabs and canslaw and if I dug every signal the place would look like a cultivated field after I left.

 

[mrwilburino]

I prefer not to use it. Every signal is another clue.......

 

[WoofWoof]

I really wanted to notch out the rifle shell casings I was digging everywhere today but didn't want to miss anything. Maybe my puny brain will let the brass go by next time but I kept hoping for something good in the range.

 

[Deusdigger]

I have a US Coin program set up and I use the notch feature to eliminate trash but I only use it in extreme cases when the trash is driving me crazy from all the noise. I almost always hunt in 12 Khz with very little discrimination. My coin program setup is as follows.
Discrimination 50
Sensitivity usually around 94-95
Iron Volume 2
Reactivity 3
Audio Resp 4
N1 97-99
N2 56-76
4 Tones
tone 1 200 (0-50) discrimination level
tone 2 791 (this is the window left for nickels 50-55)
tone 3 644 (56 - 84) tone for zinc pennys up to copper pennys
tone 4 791 (85-99 coins above zinc penny)

Like I said, I only use it in really trashy parks, etc. and I slow my swing down a little (but not a lot) to avoid as much masking as possible. The Deus is so fast that the program seems to work pretty well. I am sure that I am giving up a little depth but maybe picking up a little sanity by avoiding all the noise for a while. It may not be for everyone but it works for me. I hunt primarily for coins which are my preferred finds and don't usually dig tab signals anyway so I realize that I am giving up a lot of gold rings and I am okay with that. In a lot of the places I hunt the whole place is covered with pulltabs and canslaw and if I dug every signal the place would look like a cultivated field after I left.

Pescadore, try this where you have already hunted with your coin program in trashy areas and see if you missed anything, IF YOU CAN STAND THE NOISE. LOL
Set tones to your liking.
Use Deus fast on 12k discrimination at 6.8, sensitivity 98.
I have learned to NOT rely on the numbers on the screen as much as a good sounding tone, the reason is if you get a good tone or repeatable chirp mixed with iron and the target id number isn

 

[Ism]

Or use the notch feature in real trashy areas when hunting deep coin only, I run 7khz set (notch-1) from 2-72, (notch-2) from 98-99.
I try to run in 7khz but many times end up in 12khz. Then I might bring (notch-1) up to 78.
Don't disc high else it will reduce depth (My disc is set at 2).

 

[pescadore]

That is very close to what I generally run in most of the time. Usually sensitivity is at 94 though. I really should dig more iffy signals but I dig nickel range. clad and silver coin range VDI' s. I have found some interesting stuff with iffy zinc coin range targets and the zincolns seem to show up just about anywhere. I haven't tried the nail test and I will try to do that soon. Thanks for the info and the help. I only use the coin program on occasion and usually it is due to frustration at all the noise when I am hunting with my regular program. I will try to grid off an area in a real trashy area of my park and use both programs, compare and post results. I probably won't be hunting again until the weekend because I just found out that my Mom was put in the hospital last night for blood clots in her leg. She lives in a Memory Care Facility about 2 hours from me so I will be on the road some. Thanks again for the help and HH.

 

[Deusdigger]

I wish you and your mother all the best.

 

[sandnsea49]

I use notch for iron wrap around 97,98,99. The problem I run into is I still get vdi sounds and numbers in that range. I don't understand why, because it should be notched out.

 

[cadman_us]

I use notch for iron wrap around 97,98,99. The problem I run into is I still get vdi sounds and numbers in that range. I don't understand why, because it should be notched out.

I ran into the same problem, seems the Deus uses notch in a minimum of 6 points. I think in order for the Deus to notch the iron wrap you would have to go 99,98,97,96,95 and 94. I finally just left it alone and change programs to see if I can pick up the telltale iron grunt.

 

[Ism]

Cadman, The Deus notch can be as low as one point. Use N2 in expert mode.
I'm not real sure but it may be possible to run N1 down to a couple points in expert mode, but I haven't tried it.

 

[cadman_us]

Cadman, The Deus notch can be as low as one point. Use N2 in expert mode.
I'm not real sure but it may be possible to run N1 down to a couple points in expert mode, but I haven't tried it.

lsm,

Please check this post out,this is where I got the information about 6 point notch spread.

http://www.findmall.com/read.php?83,1684967,1685000#msg-1685000



I will quote Finder82:
"In user manual check pages 15 and 40 for further information. The notched signals may come thought(bleed) partially, if the notching window is too narrow."

Thanks to Finder82 for the information.

From the Deus Manual.
Pg 15
By default, the width of the rejection window is 6 points.

Pg 40
This advanced notch function enables you to widen the rejection
window in the event that the undesirable target(s) have a wider conductivity
range than the standard 6-point window.
For example, if the undesirable target is generating a signature ranging
from 28 to 46, you can use this option to lower the value of Threshold
1 to 28 and increase Threshold 2 to 46.

It seems that yes, you can set your notch as small as 1 or 2 points but unless it is a 6 point spread you will get bleedover. I think what this means is that if you want to notch out 93 to avoid bleedover you would need to notch 90-95. Or does this mean that when you notch a single point 93 it automatically notchs a 6 point default spread? If it does a default spread, where does 93 fall in the default? At the begining, in the middle ?

Or am I misunderstanding the default window of rejection?

Thanks,

Joe

 

[C_D]

Physically it is possible to set notch even for one point wide range. I got a confirmation from manufacturer that the function affect only set range. It doesn't decrease the depth - there is no additional filtration, just silencing audio signal.

 

[targets]

no its too dangerous to apply

 

[C_D]

All depends on searching conditions. I'm searching coins, buttons and other small non-ferrous things. So not interested at all in ferrous targets. To avoid depth loss by using discrimination, I prefer to set it to 0 and notch out iron.

 

[Ism]

Cadman, With my deep coin program I found a coin spill and large aluminum token same day that ID'd at a solid 95 (12KHz) with notch from 98-99.
I do occasionally get a 98 bleeding through but the noise usually associated with the trash in the area I hunted was greatly reduced. My lower notch is from 0-80 and I get some 79-80 bleed through also.
Just my experience.
HH
Ran

 

[lomoch]

For those using high discrim settings and notch...Why would you want to increase discrim values if you decide to use notch? I would think you use notch and keep discrim low to achieve discrimination w/o depth/speed loss.

Randy

 

[pescadore]

For those using high discrim settings and notch...Why would you want to increase discrim values if you decide to use notch? I would think you use notch and keep discrim low to achieve discrimination w/o depth/speed loss.

Randy

This is why I asked the question about notch and depth loss. I am changing my discrimination level and using notch instead. Thanks for the info and help.

 

[Terry(Mi)]

No, I never use notch, I want to hear it all.

 

[robo99]

I can understand notch not affecting depth, but what about seperation? If that notched target is on top of that seated dime, will it still get the dime? If you "null" a speaker from movement it does take time for it to return to a state of movement and you might already be past that dime. Am I right in this?