New to the GMP

Only for the discussion of the XP Gold MAXX Power Metal Detector.
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Steve Dixon1968
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New to the GMP

Post by Steve Dixon1968 » Mon Oct 16, 2017 7:42 pm

Hello to all you GMP folk

Having had a few years out I have returned to detecting by buying a used GMP
As a GMP novice whats the best advice you can give me please?
I have been googling like mad :)
Many thanks in advance

Steve



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Re: New to the GMP

Post by Bargeman » Mon Oct 16, 2017 8:16 pm

Welcome to the world of the GMP ::g

Set r/h switch to middle position
Set both iron knobs to around the 12 0-clock position
set sensitivity to around 10 0-clock

swing slow and low, and if you get a tone with a slight buzz at the end, it is likely to be iron related. But listen to the tone, try and guess what that tone is, and then dig it, and see if you were correct ::g the more you use it and dig signals, the better you will get at identifying what is a good or not so good target.

Watch the Norfolk wolf videos, and then watch them again :D

Lastly, enjoy your new detector, and show us your finds ::g


BM [:)

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Re: New to the GMP

Post by Bargeman » Mon Oct 16, 2017 8:35 pm

And this is worth a note....

viewtopic.php?f=242&t=91738

::g


BM [:)

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Steve Dixon1968
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Re: New to the GMP

Post by Steve Dixon1968 » Mon Oct 16, 2017 9:06 pm

Wing nuts coming thanks
Setting noted thanks
Steve

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Re: New to the GMP

Post by Ten pence! » Mon Oct 16, 2017 9:18 pm

Bargeman wrote:
Mon Oct 16, 2017 8:16 pm
Welcome to the world of the GMP ::g

Set r/h switch to middle position
Set both iron knobs to around the 12 0-clock position
set sensitivity to around 10 0-clock

swing slow and low, and if you get a tone with a slight buzz at the end, it is likely to be iron related. But listen to the tone, try and guess what that tone is, and then dig it, and see if you were correct ::g the more you use it and dig signals, the better you will get at identifying what is a good or not so good target.

Watch the Norfolk wolf videos, and then watch them again :D

Lastly, enjoy your new detector, and show us your finds ::g


BM [:)
You'll be losing a fair bit of depth with the sens at 10. Most of my sites including some rather contaminated ones can be handled with sensitivity virtually on the red zone, I always test any new machine on my test garden to get an idea of how it will perform in the field.

To the OP, check out my long term test of the GMP on XP section,

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Re: New to the GMP

Post by Bargeman » Mon Oct 16, 2017 9:43 pm

Ten pence! wrote:
Mon Oct 16, 2017 9:18 pm

You'll be losing a fair bit of depth with the sens at 10.
I agree you will lose some depth at the beginning, but the GMP is so sensitive to the smaller items, it can be a little frustrating when beginning with the GMP with so many signals coming through, and digging junk after junk after junk, at least by turning the sensitivity back a little to begin with you have a chance to get a handle on the tones, then you will have the confidence to open it it up more as your confidence in what you are hearing grows.

Play with the settings on your field and find what suits. ask lots of questions, there are some very knowledgeable people on this site who will be happy to help. ::g

BM [:)

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Steve Dixon1968
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Re: New to the GMP

Post by Steve Dixon1968 » Wed Oct 18, 2017 5:17 pm

So, had my first few hours out on the field with the GMP. Very happy.
6 coins and loads of small things :)
Some iron and only one piece of coke.
A little disappointing with my digging though, I should have dug more quiet high tones as I think I have left some good targets in the ground :( I have been air testing with my finds and coke etc and should have been hitting the deeper stuff :( also my pin pointing was off.
But still happy and now can't wait for the next trip :)
Thanks for all the help

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Re: New to the GMP

Post by littleboot » Wed Oct 18, 2017 6:15 pm

My settings which I have refined over a period of a few years....

Sensitivity around 12'oclock. Sometimes up to 1 oclock but only when I know the ground is quiet. Never much more than that as it ends up finding every teeny tiny thing you can hardly see. Nver much lower unless I'm in an area with a lot of interference.
Iron Volume at 10-ish. Too much and it masks signals that may be hiding near iron IMO.
Iron reject....set at 11 or 12 at most. I find its a happy medium.
Silencer....up if its busy with a lot of signals (better recovery speed) and down if its a quiet field...(for bit more depth). I tend to nail my colours to the mast and don't mess with Mr Imbetween setting. This is the control I tweak most when in the field.
The ground reject/accept ....well in my opinion THAT is the one that can most help with depth and performance. Usually it sits at 12 oclock, but on suitable ground I have push it back to 11 0'clock...just at the narrow start of the red.
Go as slow as possible and once you get a nip of a high signal go over it the area with quick motion to get a fix and let the GMP make up its mind. These faint ones are the ones to dig, especially on pasture as they mean deep goodies. Take some soil off and try again and see which way it goes.
Aluminium is high pitched but shrill. You really want clear but round tones.

Of course, like a lot of people I started by bunging it in Auto and having everything else at 12. Works well for Coke-y ground but I found later (when I switched to my current settings) how much I had been missing. Its a bit like having water-wings on....you never learn to swim properly. In this case, in Auto you never learn the subtlety of GMP-speak.
Norfolk Wolfs video for XP on Youtube is a first rate primer and I have found in practice that he is spot on.
Last edited by littleboot on Wed Oct 18, 2017 6:35 pm, edited 1 time in total.
GMP, Tesoro Invincible, wellies.

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Re: New to the GMP

Post by Bargeman » Wed Oct 18, 2017 6:30 pm

Steve Dixon1968 wrote:
Wed Oct 18, 2017 5:17 pm
So, had my first few hours out on the field with the GMP. Very happy.

also my pin pointing was off.
We have all been there Steve x; But pinpointing is an easy fix, when you get a good digable target, swing the coil slowly back towards yourself until the signal stops, as soon as it stops stop, then slowly swing the coil forward again until you just hear the signal, the target will be right there at the front edge of the coil ::g

You can try this with a coin laying on the grass, to see how it works.




BM [:)

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