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How much depth is a click of reactivity worth?
Posted by: enderman
Date: September 23, 2017 08:09AM
About an inch in air-test with each click of reactivity.

The machine will almost double it's depth when going from a reactivity of 5 down to 0.

Re: How much depth is a click of reactivity worth?
Posted by: enderman
Date: September 23, 2017 08:10AM
I can see why they added the 2.5 reactivity, otherwise there is a good 2 inch jump between reactivity 2 and 3.

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Re: How much depth is a click of reactivity worth?
Posted by: calabash digger
Date: September 24, 2017 07:07AM
I never hunt below 2 depth is good and separation is good.

Re: How much depth is a click of reactivity worth?
Posted by: enderman
Date: September 24, 2017 01:05PM
I haven't ventured too far into the deep end yet.

What are your experiences with reactivity settings below 2?

I'm out back doing some charts up as we speak. Usually I was bench testing in Basic 1 with regular tones on there because I felt it was easier to identify the break up at the edge of detection. Ultimate depth isn't as important as having a reference bench mark. Also I can't remember if I turned the silencer off or not.

So far the test is a little bit deeper in fulltones as to be expected, but it gets real tricky to find the edge of detection with the lower reactivity settings. The criteria was, would I dig this tone at a relic site while at the same time I might ignore it in a park setting if there is lots of shallow targets around demanding attention.

One interesting behavior I noticed with reactivity at above say 2.5, a coin on edge will hit at the same depth as a flat coin. With reactivity below say 2.5 it will hit on flat coins only. Interesting.

I'm doing up a fourth chart, I'm just trying to decide between a 100% nickle nickle, or some big silver. The term "nickle" is pretty ambiguous, a lot of nickles are copper alloys, steel, etc so I'm leaning towards the silver dollar, it might be more relevant to others and should highlight a pattern when trying to decide what frequency to use for silver.

Re: How much depth is a click of reactivity worth?
Posted by: enderman
Date: September 24, 2017 02:20PM
Here we go.

You can see why I say 12kHz is the best all around Freq IMO for moderately sized targets. (Air test of course, barring moisture, mineralization, EMI etc.)

For silver dimes and quarters, 12kHz is the deepest, however once you get into the really big silver the 4kHz finally shines. Keep this in mind, a big copper/silver coin colonial digger would want to use the 4kHz while a guy in the UK digging hammies (or half-dimes and fish scales locally) might prefer to use the 12kHz or 18kHz

If you want gold alloys, or are looking for aluminum or zinc-ish type targets, then you will want to go with 18kHz for sure.

Higher Freqs also "feel" better, separate better so definitely use them where you can.
8kHz and 18kHz have about the same depth on a silver dime, however the 18kHz sounds better in the field. Air-testing they behave a little more similar. This is just an example as 12kHz is deeper the 8kHz and 18kHz on a silver dime, but say you couldn't hunt 12kHz for some reason, you would have to choose between these two.

I asked Calabash about detecting with sub 2 reactivity, maybe he will chime in in a bit, however I have found as I'm sure others have that I prefer to hunt with higher reactivity, just as I prefer to hunt with higher frequencies, that's when the machine feels the best. This is part of the reason why I like12kHz and a reactivity in the 2 to 2.5 range as a good starting point, the machine still feels pretty good at these settings.

You may also notice from the charts that reactivity has more of an effect on one target vs another, depending on the Freq. Reactivity makes a bigger difference on larger objects. Also the depth seems to advance non-linear as you go lower. Going from 5-4 on a silver dollar might yield a 1/2" while going from 1 to 0 you may gain over an inch.
The reverse is true if you look at the 18kHz silver dime. Going from 2.5 to 0 reactivity doesn't gain you much depth at all, comparatively speaking.

The ruler is 15" for reference. 11" Deus coil.
For 9" coil users, subtract around~1 1/2" average from these depths.




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Re: How much depth is a click of reactivity worth?
Posted by: Architex
Date: September 24, 2017 03:13PM
Nice work.



One Man's Trash...........is what I usually find.

XP Deus / CTX 3030

Where are the diamond rings?.............They said there'd be diamond rings !.

Re: How much depth is a click of reactivity worth?
Posted by: enderman
Date: September 24, 2017 09:27PM
Thanks.

Next I will play with the Sens and TX.

I would also like to do a wet and mineralized soil test if I can figure out a reasonable way to do it.

Re: How much depth is a click of reactivity worth?
Posted by: hairymonsterman
Date: September 25, 2017 01:43AM
In the ground i find the 9"-11" coils arent effective at reactivity 0-1, on small fine targets they can chop a signal or even lose it.
The 13" coil is better, it works well at lower reactivity and high sens, but turn the reactivity up past 2.5 or 3 and it becomes erratic at high sens.

Re: How much depth is a click of reactivity worth?
Posted by: enderman
Date: September 26, 2017 11:49AM
Interesting thanks.

Re: How much depth is a click of reactivity worth?
Posted by: squirrel1
Date: September 26, 2017 08:42PM
Quote
hairymonsterman
In the ground i find the 9"-11" coils arent effective at reactivity 0-1, on small fine targets they can chop a signal or even lose it.
The 13" coil is better, it works well at lower reactivity and high sens, but turn the reactivity up past 2.5 or 3 and it becomes erratic at high sens.

Is attributed in large part to your soil mineralization.

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Re: How much depth is a click of reactivity worth?
Posted by: calabash digger
Date: September 27, 2017 06:13AM
I never hunt with react below 2 because iron is usally always present where I hunt and I get good seperation and depth with 2. As far as 12 kh being deeper on silver ive found 8 to do better than the others in my soil. I will compare it to 12 kh on the 10 inch merc and see if I over looked it on that target.

Re: How much depth is a click of reactivity worth?
Posted by: enderman
Date: September 27, 2017 07:11AM
Yes please do.

I mostly hunt without the remote so I can't tell you the amount of mineralzation here, but it ground balances at around 88.

Your dime would be a good test for ground minerals, because if you look at the first chart with the dime a reactivity of 2 or 2.5 gets about the same depth in air at 8,12 and 18kHz.
If you raise or lower the reactivity from the 2 or 2.5 setting, the 12 becomes the deepest again.

It almost looks like 18kHz is right there with 12kHz and 8kHz at 2.5 reactivity depth due to the non linear response. Those 3 would be good to check and see which one punches deepest in your particular soil.

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