What went we out into this wilderness to find?

[GKMan]

[attachment 327520 20160229_123947_20160229_130239.jpg]
I didn't know, and that's what the thrill of the hunt is all about. It was another great day in the woods. That is if you don't mind wind and rain while you're out there. Today's finds were 1850s large cents, a pewter button, another nice button with a design on it, a musket ball and half of a King George II..
You all might be saying it looks like that one coin may have been lying alongside of another by the way it is colored. Trust me, I scanned and rescanned that hole in the hopes that there was more.

Interestingly, that coin was found deeper than most other large cents I've ever recovered. It was found after I had just enabled what I now call turbo mode on the CTX.

 

[rsarge1]

turbo mode ??? lol

 

[trojdor]

turbo mode ??? lol

Sarge, I'm going to guess he does the same thing I do when I'm trying to reach down as far as possible...

Enable pinpoint lock/sizing, and hunt in all-metal pinpoint mode. The target IDs still shows up, and you can move the coil slower.
And it's much deeper.

But I'm just wildly guessing...GKMan might have a completely different 'secret sauce'.


mike

 

[trojdor]

GKMan,

Looks like a great hunt. Any day in the woods is a good day.

Finding the goodies is icing on the cake.

And, to me, the rain and that environment is what the CTX 'weatherproofing' is really meant for.

In any event, a much better hunt than I had this weekend...nice!
(The ground where I wanted to hunt was still frozen solid...few things as frustrating as getting a promising signal, then the digger hits a solid block of ice.)

mike

 

[Bell-Two]

Turbo mode huh....does the noise of the supercharger kicking in distract you?

 

[rsarge1]

LOL turbo mode I might have to give that a try

 

[Dighistory]

with just a year on my CTX I still use my training wheels...didn't even know about the turbo

 

[GKMan]

Hi Guys,
Thanks for the kudos.
I have mentioned before about the increased "depth" achieved in air tests by adjusting swing speed to what is most likely much faster than your normal swing. I can hear someone out there right now saying "air tests don't mean a thing". But, trust me, they do. In this case, I had detected the area numerous times, tweaking this setting or changing that one trying to get as much as I could out of it including using different size coils. I thought I had pretty much found everything that was there. So, I figured I would use "turbo mode" which simply has to do with how fast you are swinging the detector. The 1854 large cent that I found didn't register at all on the CTX while swinging at a normal speed but, it came through as a solid coin tone although weak due to the depth in turbo mode. The proof is in the pudding with this one. Obviously I don't plan on going out there and swinging like a mad man all the time, but if things get quite.. Too quiet, and the area isn't trashy I will try "turbo mode" again because hey, I might end up with another copper.

Sorry for being cryptic in my original post about "turbo mode", I just wanted to give a decent description of what happened and didn't have the time until now.

 

[rsarge1]

YES I remember you saying that a while back congrats I guess I will give that a try it can't hurt, wait maybe it can on the old arm and shoulder LOL way to go Gary whatever works as they say.

 

[GKMan]

I was using the 17 incher too. It eventually tires you out at high speeds.

 

[glenn3-88]

There have been numerous times especially at the landing across from snows island where gen francis marion
camped, that I thought I heard a good sound and would slow down my swing only for it to disappear. I found that
swinging a little faster than normal helped me find an area where I could then slow the swing down, cue in with some
tweaks, (different things like going to open screen and upping sensitivity etc...) and would find a good target.
works sometimes and sometimes it just turns out to be a very deep washer etc.

 

[amberjack]

one of the reasons I still have a ctx interesting when swung faster than most would think on a FBS based machine how well it does.

well done on the finds.

AJ

 

[Johnnyanglo]

I know what you mean by 'turbo' swinging, as it does seem at times to give a non-ferrous hit on deep coins where a normal swing speed yields nothing. I may initially get a non-ferrous hit, but slowing the search swing yields no more audio hits. Then a few quick turbo sweeps yields a chirp again. Switching to manual and upping the sensitivity usually helps re-locate the target, along with a bunch of mineral chatter from the ground.

The FBS machines are similar in some ways to a PI machine. It measures the signal strength/phase at different times after transmission is stopped (paused). The time constant on iron minerals is very short, much shorter than the dissipation time of eddy currents in a silver coin.

I can theorize that a fast sweep gives very little field energy to the iron elements in the soil but the same time-over-target is enough to drive a weak eddy in the coin that outlasts (in milliseconds) the iron domain reversals of iron minerals. Perhaps just enough to give a weak chirp of non-ferrous. Otherwise, at normal sweep speeds the iron chatter swamps the deep but weak non-ferrous signal and also down-averages the Fe value of the coin, perhaps into a Disc'd region on the detector (like > 30Fe), and no audio is generated. At slow sweep speed the coin signal could be so overwhelmed by the stronger ferrous mineral signal that even with an open screen it won't respond and is treated as noise to be eliminated by the circuit algorithms

john

 

[GKMan]

Thanks John. I may have said it before, your technical explanations always amaze me.

 

[kreagerm]

Very interesting guys, thank you for the extra bit of info.