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Another Short Hunt Today At New Potential Hot Spot, Or So I Hope. & A Bit About Ultimate Coil.

Critterhunter

New member
I just came back from hunting that cleared out weeds/brush spot they cleared under some power lines to maintain. I haven't seen that spot cleared in my entire life that I can remember. It's next to some old railroad tracks and right behind where an old house used to sit years ago. I was hoping either I'd get coins from the house's backyard that was there before the power lines went in years ago, or perhaps I'd find an old rail road pick up spot for the two small cities (which used to be towns) that border it.

Only lasted about 20 minutes as it turned out in the sun I was boiling hot wearing sweats and a heavy shirt. Like walking into a furnace. The power lines were causing bad EMI, and the 13" Ultimate is more prone to that too than the 12x10, so I ended up having to hunt with sensitivity almost all the way down in manual. Auto didn't help any and neither did noise band 1. I almost always use band 2 to match the ID charts better but sometimes when near EMI band 1 does the trick. Not this time.

Concerning the other issue with the Ultimate I was having, it also snags on the field stubble much easier than the 12x10 does. For sure if hunting woods or fields I'd mock up a solid coil cover to zip tie to the bottom of it using corruplast (durable/tough plastic sign material, which is free if you dumpster dive behind convenient stores). The 12x10 seems to slide over the forest floor fairly decent for a spiderweb coil design. Easier than the 10" Tornado, and I suspect it's due to the webbing having less open air between it than the Tornado does between it's spokes. Still not as easy to use as a solid coil over rough ground though, but it's shape is for sure easier to work between stubble than the Ultimate is.

Been planning on yoking an illegal "lose weight" sign off a telephone pole or from a store dumpster made of curroplast (from the side it looks like corrugated cardboard with an open gap between the sides) to zip tie on it for my woods hunts. Got to do that sooner or later. The stuff is waterproof and durable as heck. I make goose decoy silhouettes out of it for field hunting. If you ever plan to do the city a service and yoke one off a telephone pole or city tree lawn that is against the law to stick there, don't dare touch political signs. That's a felony even if they aren't supposed to stick it there. Bad news...

Checked a few iffy coin hits which turned out to be larger pieces of junk and then figured I'd come back when dressed properly and also with my 12x10 to tame the EMI better. I still have high hopes for the spot, as the road it's up against is old and so are the RR tracks, and being with it in the perfect location for the people from both cities (towns back then) to get on a train, I think it might have potential. We worked a spot like that a few years ago and got some really nice silver and other stuff out of there.

I switched over across the street to some woods I had always thought of hunting due to them being on the way to a close by old rock quarry (which that lake is now privately owned) where I hear there was ice skating in the earlier 1900's, and I suspect many people used a few dirt trails to head there to ice skate back in the day and such. But when I entered the woods I saw about 8 deer standing around wondering what I was up to. Wasn't afraid of the deer but it was mid day with a lot of traffic and I didn't want to risk scaring them into traffic, as that spot is about the only block of little woods they can hide in during the day.

This is a suburban area and those deer come out at night and work people's front yards. They've got a good life, being that deer are grazers like cattle so there is actually more food for them in open yard areas then mature woods could ever provide, but when it comes to bedding down during the day that's pretty much the only place nearby they have to hide. I'll work those woods early on a weekend morning when the traffic is dead so those deer can wander to the next bedding site they have without risk of getting hit or something. I'm a deer hunter but I have no wish to see one of those beautiful animals get hit by a car. Saw a real big buck bedding in there too. I know where I'll be shed hunting come January.
 
Critter,too bad about the EMI problem,maybe just a problem for that area.Thanks for the information.HH Ron
 
Larger coils do tend to have more problems with not only EMI but loosing small targets. The WOT has to be tuned down as well. They do still get better depth.....just a shame you cant put all that power available to the coil.

Dew
 
A new coil for the X-Terra a 15" 3 to choose from plus a 6 inch , that would be nice if designed for the Sov GT lots of coverage and deep to but i don't think it will ever get made now. Jim

http://www.coiltekmanufacturing.com.au/x-terra.html
 
Well, I don't want to make it sound like the Ultimate is really bad with EMI. I have been able to run at full manual sensitivity with it at some sites. If a coil can do that it's a pretty solid coil IMO. Just that at some sights either EMI or the nulling from ground minerals cause me to run the Ultimate lower in sensitivity than the 12x10 for both reasons sometimes. The SEFs seem especially imune to EMI problems much more so than round coils, but I still think the Ultimate is very good at handling EMI for a round coil of it's size. Just not as good as the SEF IMO, but the SEFs are stellar at stability so that's a hard measure to reach for any other coil.

I have to send back the Ultimate on the 30th of this month to the owner. Hope is cleans up nice because even though I've babied it being white it looks pretty beat with stains and such. The owner said not to worry about that so I'm not too worried if it doesn't come all the way clean.

I plan to buy myself an Ultimate from Kellyco by Christmas if I can swing the money, so that should tell you guys how much I like this coil. Would I trade my 12x10 for one? No, but on certain days I feel the Ultimate is different enough to want to use depending on my mood. Still not sure if it's as deep or deeper as the 12x10, and nor do I suspect it separates left/right wise as well, but darn if I can see any difference between them on depth or separation thus far when checking marked targets head to head in the field. It is a fantastic coil.

The "feel" of it's balance on the shaft and it's awesome coverage alone is worth it to me for gridding out large fields or large beaches. I like it's feel on the shaft much more than I did my 15x12, although I think the 15x12 is a more stable coil a bit. The 12x10 without a coil cover is a dead match in weight to the Ultimate but darn if the Ultimate don't feel lighter for some odd reason. Has to be it's round shape more evenly distributing the wight around the shaft I think?

I hear Detech now makes them in black too, so if Kellyco can't sell me a black Ultimate then I'm painting it top and bottom with spray on bed liner when I get one. Ditching the coil cover will save a few more ounces, and 4 or 5 coats of bed liner protects well, looks fantastic, and only adds grams of weight versus ounces for a coil cover. That much weight savings does matter all the way at the end of a shaft.

Deepdiger, cool looking coil. One of the things I've been waiting for for the Xterra line is a coil 12" or larger in the 3khz frequency to punch deep in my minerals and also to hit hard on silver/copper. I think the biggest coil in 3khz up to now is 8", ain't it? For sure there was no 12" or bigger in that freq. Seemed a big gapping hole in their line up of coils to me. Would be very interesting to see how that thing does on deep silver and copper coins.

Only thing is this- For concentrics they seem to max out in size while still retaining sensitivity to coin/ring sized targets at about a 10.5" to perhaps at the most a 11 or 12" coil. DDs seem to retain gains in depth on coin/ring sized targets to about 14" in size. That's at least the general rule of thumb I always saw for myself and also read from others. I've always figured a DD coil 15" or bigger would not show gains in depth on coin/ring sized targets and would actually lose depth, even if the soil was neutral, as it's now about the sensitivity of the coil and not how much ground it's sucking up.

However, another factor comes into play too- minerals. While DDs handle minerals better, they too have their limits for coil size in some soils or sands. In my soils/sands, it appears either a 12 or 13" round DD coil is about max coil size to still see gains in depth on coin/ring sized targets. Anything bigger and they appear to start washing out the target at depth with too much ground stew being soaked in *in my soil*. That's one of the reasons I'm real interested to see if the Ultimate gets as deep or deeper than the 12x10, because I want to know what that brick wall is in my soil for the Minelabs, and I suspect that limit is even smaller in size for non-Minelabs due to the unique and awesome way Minelabs ignore the ground signal.

The Ultiamte though isn't a typical round DD coil. It looks suspiciously like a Pro Coil, so I suspect it has a more sharp/well defined detection field and soaks in less ground stew, so it might be even a 12" conventional round DD coil won't show gains in depth in my soil while this 13" Ultimate will. I'm still sorting that out. Might even be a 14" coil is the limit for me and not 12 or 13, because the 15x12 was of course a 15" coil in the length axis. Far as I can tell the length effects the depth and the width the separation, yet for sure the 12x10 gets far better separation (easier) than even a 10" round coil IMO. It almost feels like a tiny trash coil in that respect of how well or easily it separates width wise.

I feel one of the reasons why the 12x10 shows gains in my soil depth wise on coins/rings is that perhaps it's such a tight well defined field that it isn't washing out the target via too much ground matrix being taken in. Could be even a 12" round coil won't get as good of depth in my soil, but I don't know yet. I've got somebody who is offering to send me an S-12 to compare to my 12x10 and 10" Tornado when I'm done testing the Ultimate. Stay tuned for more pointless stories that go nowhere...:biggrin:
 
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