Whats wrong with my deep coin program...

[Ism]

So today I was out playing with settings for my deep coin program. I was running at 12KHz but decided to drop it to 8KHz because of the sensitivity to a couple very small (near surface) targets that sounded deep.
I don't know if it will help but I didn't dig any small targets after changing the setting but I may not have passed over any either. I also got a lot of falsing "98" TID so I set my notch to 93-99. That solved the falsing issues but created another. Half dollar/dollar and large silver rings fall in around 95 at 8KHz. While I do get a repeatable short chirp, its not good at depth. Quite frankly I seldom find any half dollars and never found a silver/Eisenhower dollar. However I have found a couple large silver rings. This is the deepest I have been able to achieve in air tests while maintaining a clear response to coins. What do you veterans think? Any suggestions?

Here's the program;

Normal | Expert

Disc-5 4-tone 5/43/78
Sens-95 Tx-2
Freq-8KHz Offset-0
Iron Vol-0 Silence-3
Reactiv-1
AudioR-5 Overload-01
Notch 93-99

 

[MHirschmann]

That looks to be a good program. If you are able to go slower, I would also recommend trying Reactivity=0. I have gotten a bit more depth with a value of "0" but you will have to slow down a bit.

I see your logic with your notch at "93-99," however, I do have to tell you that I found a walking liberty half on my second time out with the Deus and it rang up a clear solid "95" in 12Khz. As you said, it doesn't happen often but I really like when I happen across one and so I don't know if I could risk notching them out them out.

I feel the biggest nuisance in this range are crown caps and I know they are a problem for a lot of Deus users. I can identify them (a lot of the time anyway) because I have noticed that they tend to bounce between 88/89 and 91. When I see the bounce, I know it's a bottle top, every time. I tested this by digging 200 targets that did the "bounce" and not a single one turned out to be a coin. Now I never dig them, unless I am in a spot where I haven't had any hits in a while and want to dig one just to prove to myself that I "know" what it is.

Although the "bounce" seems to work for me, I hope that someone finds/posts a better way to identify these things. I am also hoping for something to help better identify these in one of the future updates as well as the option for a narrower notch field.

Thanks for posting your program and I think you should do very well with it. It surely will quiet down your hunt. Let us know how you get along with it. HH -Marc

 

[mrwilburino]

Looks pretty good to me

 

[Big Boys Hobbies]

I like the iron vol up a bit. I like to hear it myself. I am not a fan of notching. Just my opinion.

 

[Ism]

I agree, deeper quarters rise in number so I will be notching them out using the current program. I guess I can't stand the idea of missing the good targets for the sake of some noise.
I will try a higher iron volume and remove the notch. I hope XP either eliminates the iron wrap or allows for a 2 digit notch in the next version.

MHirschmann, I can usually cypher bottle caps using 4 tone by a drop off sound and short high tone as I sweep the target (coins are generally smooth on the entry and exit of the sweep). I've also noticed the bounce you speak of.
But two targets I thought were bottle caps turned out to be silver dimes that were next to trash fortunately I dug them. Maybe it was the slight difference that told me to dig. I like to call out the targets before I dig them.
I'm getting better as I go, however the change in frequency from 12k to 8k set me back.

Thanks for your kind replies
Ran

 

[lomoch]

Ran,
You'll get noticeable depth increase by bringing the silencer value down. By bringing it down to around -1, 0 or 1 you'll have less filtering/processing goin on. This in conjunction with reactivity has been huge for me. Give it a go during some of your testing to see if you like the results yourself.

Randy

 

[Ism]

Thanks Iomoch, I'll give it a go. I removed the notch also. I was looking over some other programs and saw mine is similar with slight difference.
Today I was out having some fun but the earth is hard so I didn''t do much digging for deep targets...the two I did dig were flattened screw caps 9" deep...ugh!
Its tough enough digging that deep, why couldnt at least one be a coin...lol