CoinStrike and Threshold

[Tony N (Michigan)]

I understand that some of you detect with threshold at +4 some times. How do your nerves hold up to that constant loud humm?

Also, how does a very deep faint hit rise above that very loud background humm of +4 threshold?

Please note this post by Bill Ladd as he quotes the legendary George Payne concerning threshold on the CoinStrike:

http://www.findmall.com/read.php?35,146476,146476#msg-146476

A threshold adjustment works differently than that of a sensitivity adjustment. The threshold setting reduces detector gain by

 

[Mike Hillis]

He is talking threshold. Not Coinstrike. Talking "at" the C$, not "from" the C$.

+1 is like everyones elses +1.

+2 starts the chopping he talks about except actually it becomes an overload signal and a +2 will overload most ground and micro trash signals, you won't hear those signals because the threshold tone overloads them, they aren't strong enough to overcome it.

+3 overloads foil signals, you won't hear them because they can't break through the threshold. However, most foil range gold rings will still sound as will higher conductors like nickels. Foil range rings have a larger signal and can overcome the tone.

+4 overloads foil and nickel signals, you won't hear them because they can't break through the threshold.

Got Coin$trike?

 

[Tony N (Michigan)]

Mike,
How could anyone psychologically endure the onslaught of the constant humm for hours on end with a threshold of +3 to +4 on the C$?

To me, this would be unbearable.

Maybe if I was getting a faint, deep silver hit I might run a higher threshold to see if I can hear it better?

On my Explorer I can set it to an extremely faint threshold. I wish the C$ could do this too. I wonder if one could go into the internal settings (electronics) and ajust a pot or something so that even though you were at a threshold of +4 it would sound like a +1 or 0 (zero) and it would still be hard for the foil and nickels to come through?

 

[Mike Hillis]

Take a glass. Put in the following items.

A small piece of wood, like a small piece of toothpick.

A small pebble.

A larger pebble twice the size of the small one.

A Larger pebble four times the size of the small one.

The piece of wood represents the tiny weak signals and the ground signals. The smallest pebble represents ground signals and micro trash signals. The medium sized pebble represents the foil range signals. The large pebble represents the nickel range signals.

Now put in just a tiny bit of water. Just enough to half way cover the smallest pebble. Notice that you have raised the piece of toothpick. That is what a +1 setting does. It raises up all the tiny signals, including the ground signal so they can be heard.

Now remove or ignore the floating wood and add enough water to cover the smallest people. This represents the +2 setting. You have now covered up the ground and micro trash signals with the enhanced tone overload of the +2 setting.

Add enough water to cover up the medium size pebble. This represents the +3 setting. You have now covered up the foil signals with the enhanced overload of the +3 setting.

Finally add enough water to cover the largest pebble. This represents the +4 setting. You have now covered up the nickel range setting with the enhanced overload of the +4 setting.

Now with all that said, there are some targets that fall in the ranges that the positive threshold covers up which can still be heard. Foil range rings will still be heard at a +3 setting because they give a stronger signal than foil. Picture those items as the pebble wearing a tall pointed hat. They are still foil range, but have a strong enough signal that they still rise above the covering positive threshold.

That completes the C$ positive threshold setting tutorial.

Got CoinStrike

 

[Mike Hillis]

Most folks never utiltize the postive threshold features. Too much power. There is a lot to this machine that gets missed.

 

[Tony N (Michigan)]

n/t

 

[Tony N (Michigan)]

this works in a real life situation.

I can put some aluminum foil, iron nails, rings in about a 2ft by 2ft area and see if the rings (in the words of the musical group the Doors sang) break on through to the other side.

But gotta wait till the snow melts.

 

[Tony N (Michigan)]

on either my headphones or on the detector itself so I don't hear the +4 threshold, will I still be able to hear a deepy rising above the threshold?

Looks like something for me to test out.

 

[Kevin[NC]]

Nope. It wont work.

 

[Kevin[NC]]

I've never seen any depth advantage of +1 to +4 over a setting of 0.
I hunt 90% of the time with a -25 to -35 threshold and a high sens. setting near 10. Lowering the threshold lets me run high sens. setting and gets me all the depth I need. I also get smoother ID with it setup this way. I have double checked many deep targets with the near 0 threshold and haven't seen anything yet to make me change. Sometimes the higher threshold made the signal worse, especially when iron was near by. You can tell about what the threshold is doing by pinpointing a target with a 0 setting and then changing it to -25 or lower and pinpointing it again.
I can leave the threshold or the sens. high, and lower the other way down and get good depth. lower both and loose depth bad. run both high and go nuts with the crazy id and sounds. I find more in my area with the high sens. and lower threshold settings.
I have 10/-35 saved in memory location 1 and 5/0 saved at location 2.
I check many deep targets with both and always end up on program 1 when I start back hunting.
HH'n

 

[Tony N (Michigan)]

After doing so much research on this relationship between Sensitivity and Threshold setting I feel now that I should not have any trouble when I finally get into the field.

There are just a couple more things I need to research like having tracking on etc.

Thanks for the good "real life" tips!

Tony

 

[Kevin[NC]]

I normally leave tracking off. Most of the ground I hunt changes very little. I do from time to time switch to all metal mode and bob the coil to make sure the ground balance is still right. Hear nothing while the coil is raising and lowering with no target near means it's right. I have used tracking in black sand at the beach and it did good. The amount of black sand changed too often to keep the same settings. Bad ground is where you'll se the advantage of tracking on..

 

[Kevin[NC]]

The only time I'll run a threshold setting of near o is in a very clean area with widely scattered targets, and I'm using the all metal mode. Like relic hunting a large field or back in the woods.
The reason for this is, the higher threshold settings seem to widen the scan of the coil. This is the reason I lower it in disk mode in most areas with iron and trash all around. I also notch nothing out and run iron disk at 0 so I know how much junk is around. Iron gives low tones and I learned to ignore them. This is the same way I use my CZ5 and Minelab Explorer.

 

[Tony N (Michigan)]

Kevin, thanks! I run my Explorer much like you but around Iron Mask -14 to -15.
I really think that this CoinStrike is going to find some goodies. No one detector does it all.

I noticed in the Fisher Constrike Numeric ID Charts by the venerable metal detector hall of famer, Mike Hillis (P.S. I'm getting his, yes HIS 10.5" C$ coil! Should have had him autograph it!) at http://home.insightbb.com/~johnhetti/coinstrike/charts.htm I noticed he states in the "CoinStrike: Relationship of <u>Sensitivity</u> and <u>Threshold</u> chart that <i>"The key take away from this chart is that the closer you can keep the threshold to 0, the more performance you are going to get out of it. Even if it means dropping the Sensitivity below 5 to keep it stable."</i>

But I see what you are saying, Kevin. In trash, the influence widens from the diameter of the coil as one increases threshold and thus picks up more undesirable influence from trash. The DFX Hotshot coil is notorious for this. I was always going into pinpoint to find the source of the tone and often it was iron bleading its influence into the area of the coil from the outside of its diameter.

Kevin[NC] Wrote:
-------------------------------------------------------
> The only time I'll run a threshold setting of near
> o is in a very clean area with widely scattered
> targets, and I'm using the all metal mode. Like
> relic hunting a large field or back in the woods.
>
> The reason for this is, the higher threshold
> settings seem to widen the scan of the coil. This
> is the reason I lower it in disk mode in most
> areas with iron and trash all around. I also notch
> nothing out and run iron disk at 0 so I know how
> much junk is around. Iron gives low tones and I
> learned to ignore them. This is the same way I use
> my CZ5 and Minelab Explorer.

 

[Mike Hillis]

unitl my mother came home and caught me and said "GET DOWN FROM THERE RIGHT NOW BEFORE I TAN YOU BEHIND!!!!!!"

CoinStrike

 

[Tony N (Michigan)]

Did you get my coil?

Did you notice where the protector near where the chord goes into the coil is cracked like I explained to you on the coil I traded you?

Let me know how you like it. It detects a long swath!

Tony

 

[Mike Hillis]

UPS tried to deliver it Friday, then yesterday, then I made arrangements to pick it up after hours, but the guy was still out so they had me go home and the guy bring it back by about 9 o:clock last night. Long story short, I got the coil

Got to be honest, this is one beat up looking coil. But in air testing, it seems to work great, and thats what is important to me

I see what you mean on the cord. I think a good teflon tape wrap will fix that up good as new. I'm going to need to get a cover for it, though. It doesn't seem that any of your scratches and dings went through, but I don't want to chance it.

I'll take it out Thursday. Hope to show pictures of gold rings when I get back.

 

[Tony N (Michigan)]

The coil does not look beat up. The bottom looks scruffed like I explained to you whereas the top of the coil looks almost brand new.

The coil was treated lovingly by me when I used it. Any coil without a coil guard is going to have lots of scratches on the bottom.


If you don't like it send it back and I'll send your coil back. My coil cost a heck of a lot more than yours did but I was willing to give you a break.

 

[BJ in Okla.]

A friend sent in his CZ 5 znd CS, for a check up, both were about 3 month's old. He was told by a Tech at Fisher that there were over 20 adjustments on the inside of a CZ and on the CS there were NO adjustments and that if anything was wrong with the CS, the board would have to be changed out. HH..BJ

 

[Mike Hillis]

Rather than a continued discussion of appearances, I would rather end with part of my earlier statement:

quote "it seems to work great, and thats what is important to me" unquote

HH