Big Iron -- No Reject?

[Atlas]

Just wondering if anyone else has has a similar experience with the MXT. I've had the unit for a few years now and usually hunt in relic mode, trigger forward and rejection around three to four (still accepts nickles) it will clip or null (reject) on nails. Sensitivity is at preset and the 10" DD elliptical. ground balance and then set to fixed.

In the areas I've been hunting the unit will hit with high tones on larger Iron objects such as cans and can lids tobacco cans etc. I even have good tones on smaller disc shaped iron as in fender washers. These objects register in the 30 to 50 range on the ID.

I've tried coin mode but like the relic mode with trigger forward which is supposed to reject everything below the reject level. Tried switching to coin mode but these large iron targets still sound good there. Also tried all metal and the iron ID was showing low probability for Iron? I thought the iron ID is why everyone uses these in Alaska. I have hunted with the GMT in Alaska and its iron ID on dozer blade is exceptional.

Any suggestions would be appreciated, maybe the unit needs to go into the shop?

Thanks

 

[coloradocav]

I don't think it's possible to completely cancle out all iron. I relic hunt exclusively and dig many cans and washers, sometimes it's really annoying to get a good signal and dig up a %^&*! can, washer,etc. On the other hand some of those "good iron signals" turned out to be guns, cannonballs, stove doors. if your in an old area you get the soldered seam cans and there is no blocking them from reading a good signal. I was annoyed yesterday by your very same ordeal, I have been hunting what appears to be an 1880's military camp/railroad camp, under the ground is just littered with iron, it will make you pull your hair out, I just know somthing good is in the field. last week I dug 18 45/70 cartridges in one hole! in the hole with the 45/70's was 2 railroad spikes some large nails an iron bar The iron completely masked the cartridges! I mean thats alot of brass, I should have at least got a teaser of a good i.d. number in there. I really don't know how I'm supposed to find any deep buttons or any other good small item in that area. it seems to help that the trigger is in the forward position but were still gonna get big iron, like I said before sometimes that big iron pays off. Good luck and HH.

 

[ColoradoGoldMan]

In the first post the reason you get a strong signal on large iron targets is because of both the magnetic nature and it's electrically conductive property's. It causes widely varying VDI numbers which will give high tones. The larger the iron target the worse the variations, which can rap around the VDI wheel to produce good target indications, or not. In the second post Iron masking is major problem with current VLF detector technology. With auto GB detector this can be even worse, Try placing a silver dime on clean ground and cover it with a plastic cup or container so you are about 6" above the the coin. Place a small tack or staple directly over the dime on top of the plastic cover sweep the coil over the staple and you not see the dime. Remove the staple and sweep the container again, the dime will ring out loud and clear. Replace the staple and sweep it again and see the results. Even very small pieces of iron mask large targets relative to their size. The reason is because of the conductive and magnetic property's combined to overwhelm the the detector so it only sees the iron. The receive coil does see the good target but because of the irons robust signal it can't do any thing about it. The eastern relic hunters have been flocking to the TDI because a PI can be tuned to ignore the iron and see the target much better. and give a good signal to dig. There is much more to this than I have written here but this not the place to explain, Faraday's law, Prof Maxwell's equations and Lenz's Law with respect to magnetic and conductive property's of Field theory
Hope this help you out.
C.

 

[Atlas]

Thanks for the feedback. I have a number of different coils including the smaller elliptical which I put on to reduce interference from multiple targets. Perhaps this is all one can do.

 

[Daniel A.]

Have hunted farm fields in England and yes big iron will fool the machine, I also hunt in relic mode with the 6x10 coil. Dan

 

[Atlas]

Thanks for the input Daniel A.

How did the MXT stack up in your hunts in England? What other detectors are popular for these hunts? I would also think a waterproof machine might be a good idea if it rained you could keep hunting. Did you find anything good with the MXT as in silver or gold coins? and if so how deep etc?

Do you live there or did you go on one of the organized trips? I'd like to go sometime but haven't really researched it much.

 

[Daniel A.]

The MXT did real well hunting England iron is the biggest problem to deal with. The F75 is a hot machine over there as well. I have just picked up the F75LTD as I am booked to go back in March for a week and will take both machines.
The bp on the new F75 LTD will be an asset over there hunting potato rows. Most targets are only a couple of inches deep lots of lead and buttons.

The hammered silver is one of five I got a 1217/8 Henry short cross, a 15 century casket key. Next trip will be with ChicagoRon a Senior member who leads the hunt they stay in a rented house referred to as a barn hunt in Colchester. The last trip I booked I stayed full board but after talking to the barn hunt guy's it is more like a vacation than work which I will like better. Most hunters are from the states on these hunts, I'm out of Vancouver Canada, last trip two guy's from Oregon were also in the house so all three of us from the west coast. In Vancouver most of my hunting is park jewelry hunting. For the relic hunter after going there and digging stuff hundreds of years old it can be hard coming back and digging stuff 200 years old.
The area is semi- arid south east England. This past fall hunting produced the most gold I think 22 pieces and both Oregon guy's got some none for me.
There is an amazing amount of land available to hunt on this tour.
Dan

 

[Daniel A.]

Forgot to mention rain or shine you hunt. Am looking for a weather cover for the MXT now last trip just wrapped it in plastic. Dan

 

[wojo113]

n/t

 

[wojo113]

Glad to read that I'm not the only one with a great amount of hair loss when I get great hits and dig up iron. Thought it was me or the machine. Just have to keep chugging and I will eventually find something more than jar lids. Did find a jar lid made in the thirties so can't be all bad. LOL Happy Thanksgiving everyone.

 

[kyphote]

So glad to find this thread! I just purchased an MXT and my first four finds were horseshoes at 6 - 10" depth. This was alarming because the VID was reading "button" and "buckle" -- (basically screaming "dig you idiot, there's something great down there!"). On my fifth horseshoe, I drove home, boxed the machine and planned on shipping it off tomorrow for repair. Reading this thread, I take solace in the fact that my machine is functioning as it should, but is this behavior similar in other machines using the same frequency? Thanks ColoradoGoldMan for your earlier explanation as to what causes this issue.

 

[Gila Marc]

Here in the desert we find many pieces of old iron reading a good targets. It seems the more oxidized the iron the better it reads. A new nail will be discriminated out, but a real old rusted nail will read in the silver range. I find it sometimes helps to use Prospecting Mode and pay close attention to the ferrous percentage.

Marc

 

[HuntinDog]

kyphote:
With that many horse shoes your luck has to change
I feel it's like finding a penny heads side up.

I run in relic mode trigger forward and dig any positive targets.
Yes, you dig a lot of big iron, but it's all good.
I'm not out there to get rich, I'm just having a good time.

HH

 

[kyphote]

kyphote:
With that many horse shoes your luck has to change
I feel it's like finding a penny heads side up.

I run in relic mode trigger forward and dig any positive targets.
Yes, you dig a lot of big iron, but it's all good.
I'm not out there to get rich, I'm just having a good time.

HH

You're right about the luck! Today I found 7 two piece buttons (Georgia local, Virginia local, 3 script I's, and 2 eagles), a partial Confederate spur, 2 minies and some other stuff. All told, a $1,000+ haul! Just paid for my detector and don't plan on replacing it! (Went trigger forward by the way.)

 

[HuntinDog]

Good for you...
Congrats on the Great hunt.
Keep it up.

HH

 

[Old Katz]

Daniel:
Did they let you keep any of the relics you found? Just wondering what the laws are
over there. Some places I'm told are strict.
You made some great finds. I wish our farm land here in Indiana were as saturated as those
in England.
Katz