Stabiliser/RX Gain GPX5000

goldstrijk Sun Feb 01, 2015 8:26 am

I am a bit confused with the settings I have seen on some posts
I have always had my Gain higher than my Stab
Yet I have seen some settings that the Stab is higher than the Gain scratch

I'm sure it says in the manual that the Stab is 4 below the Gain
Mind you, on my 5K I can't do that, as it starts to become unstable
Sometimes I can't have my Stab higher than 4, no matter what my Gain is set on
Anyone got any ideas?

Pete
.
goldstrijk

Aurumick Sun Feb 01, 2015 2:46 pm

G'day Goldstrijk

If you want stabilizer in higher numbers,

Try changing Audio settings QUIET/NORMAL/DEEP/BOOST.

I run in QUIET run GRAIN as high as you want, in (fine-gold or enhance) /SOIL TIMINGS
Stabilizer 7-12 Depending on COIL
As I've found 7-8 on stabilizer when using 15x12 ML mono.
Yet other coils stabilizer on 10-12 sometime as high as 14.

Just remember with stabilizer the higher the number the less stable detector is.

Cheers Mick

martinjsto Sun Feb 01, 2015 4:48 pm

i think you should get the best depth when in GENERAL and NORMAL but you will also want the gain as high as possible and the stabilizer as high as tolerable. even if its wobbly and erratic. you will still hear the real targets over the noise and if its a small barely noticeable target or at depth just slow the coil right down to a creep as you run it from front to back over the target, if its gold it will repeat and be distinguishable it just takes time to learn the different sounds and you really need to be running the 5k maxed out nowadays. just gotta put up with the noise but its no good running a quiet detector either.

goldstrijk Sun Feb 01, 2015 6:37 pm

Thanks for your comments guys
Gives me a clearer picture of those two settings
I think I may have been trying to run the detector with a dead smooth threshold, which by the sounds of it, I would not picked up targets as I should
Thanks again Smile

Pete

CrazyPete Mon Feb 02, 2015 6:40 am

goldstrijk wrote:
I think I may have been trying to run the detector with a dead smooth threshold, which by the sounds of it, I would not picked up targets as I should
Thanks again
Pete

What the, one season away and you've forgot all i tolds ya Q07

Stand just here Pete ============> X nope, a little closer =====> X
A little closer ===> X now! stand on the dotted line .............................................
.............................. Mad

now, dont

friggin

forget

again

Pete (The old slapper) Razz

goldstrijk Mon Feb 02, 2015 9:20 am

Haaaaaahahaha!
I was wondering when you would pick up on this one bounce

You better come back over here to give a refresher course! Laughing

Pete

goldstrijk Mon Feb 02, 2015 9:23 am

Pete
What I was trying to say, that some settings shown by others on the different forums, had their Stab higher than the Gain scratch

the hill folk Mon Feb 02, 2015 7:46 pm

Well, now I'm confused!!!! I thought, from taking note of what many many others say, that I need to run quiet.

joe82 Mon Feb 02, 2015 8:32 pm

mate? IMO you need a smooth threshold to hear the faint murmors that are small gold or big gold deep with a unstable threshold this cant be herd and you may aswell go home, I have done tests with a flat smooth threshold and just creeped it up a little louder whilst running a sub gram nugget over the coil and the target signal disappeared as I backed the threshold back the target re appered and as for the stab I always keep it 2-4 below the gain,eg, I use 14" NF round gain is 15 stab 12-13 when using 11" mono gain 12 and stab 9 (note by turning the stab down in numbers it is increasing it and going up in numbers you back it off allowing interference in, to get the best from your detector you need to find the sweet spot in there, just my thoughts and they may not be correct if so pls let me no, cheers joe

G.B. Tue Feb 03, 2015 6:22 am

Run whatever settings you want as long as you have a smooth threshold. Basically the smooth threshold should be your only constant because as various conditions change during the day so should your settings

martinjsto Tue Feb 03, 2015 8:18 pm

please correct me if i am wrong here but i would of thought most people over the years the 5k has been out have endeavoured to run it with a stable/smooth threshold as possible. now i understand its about hearing the slightest murmur when set this way but dont you think with all the easy shallow gold gone already its time to crank it up and stop dumbing it down just to be quiet? sure it is stable but at what cost in depth? train your ears to hear the difference and you will find deep gold, its not like you wont hear it due to your machine being unstable you just didn't recognise the signal from the wable enough to go back and check it properly.
whats your thoughts, does having a stable and smooth machine actually means you loose depth?
cheers

Guest Tue Feb 03, 2015 9:34 pm

G'day Martinjsto,

I will say that if I ran my 5000 like was mentioned above, last year over in WA I would have missed quite a few deep ones, which were only a very iffy change in the threshold. So I dug and they didn't really change much until I had dug over 6" off the top then they started to sound like a proper target. So I always try to run mine as smooth and stable as much as possible without dumbing it down too much. These were gold and I had to dig over 2' down for them.

Cheers.

Mike.

Guest Sun Mar 22, 2015 9:19 am

Minelab Knowledge Base wrote:
GPX 5000 & GPX 4800: What is the purpose of the Stabilizer control?

The Stabilizer function controls the point at which faint variations in the Threshold begin to be heard. These faint variations can either be ambient noise or faint target signals. As you increase the Stabilizer control, faint target signals will become louder, but the noise level will also increase, which may potentially hide a desirable target signal. The Stabilizer allows you to mask these faint variations to provide a perfectly stable threshold, improving your ability to identify faint target signals.

The Stabilizer is best left in the FP (factory preset) position until the soil conditions in the location are determined. Once the Rx Gain level has been set for the local conditions and other audio settings have been selected, the Stabilizer can then be used to fine tune the Threshold stability.

To find the optimal position of the Stabilizer, ensure that the coil is being swept across the ground. One number below the point at which the threshold begins to chatter, is generally the best setting.

The effect of the Stabilizer could be seen as having a similar effect to that of the Rx Gain control. However, the Stabilizer affects the audio processing only and does not change the Receive (Rx) signal, so should be used as a final stage fine tune. After making any adjustments to the Stabilizer, if the ground conditions change or you wish to change coils, you may need to reset the Rx Gain, but before doing so, return the Stabilizer to the Factory Preset setting first. This will ensure you select the most appropriate Rx Gain level to suit the conditions, and then you can fine tune using the Stabilizer.

Tip: By turning the Stabilizer control close to minimum (anti-clockwise) the threshold will be very stable, but you will have lost a lot of sensitivity to smaller targets. This can be a desirable feature in certain scenarios such as looking for large nuggets in a high-trash area, or using the GPX 5000 and GPX 4800 to search for coins or treasure.

Tip: We would recommend the best order for setting these controls are:
1. Select an appropriate Search Mode
2. Select the desired Audio Type
3. Adjust Rx Gain until the threshold starts to break up
4. Adjust Stabilizer to smooth out the threshold.

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