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Topics - woody

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I have been receiving much feedback on the Nugget Finder Evolution coil using a fully modded GPX-5000 and a standard GPX-5000.

On the standard detector the Evolution coil was chattery, but when the modded one was used it could bring in one of out 10 gram test targets nice and clear at good depth.

A standard GP-3000 and the standard GPX-5000 could not hear the targets.  Testing was carried out in Nth Queensland by BM.

As a side note, the Elite coil i understand is the same design as the Evolution, the same performance is most likely to be similar.

Correct me if anyone knows different.

We all know what happens if you are using a GP Extreme 3000 3500 or GPX 4000 4500 4800 5000 detector near powerlines, the detector will go absolutely crazy and you will be forced to use a DD coil in cancel mode with a huge amount of depth and sensitivity loss. The latest set of upgrades that i have been working on solves most of the issues with power line noise, but in removing power line noise one would think that there is some sacrifice in depth and sensitivity.  This is not the case, the detectors are much more stabile and more sensitive, the detectors also ground balance better and target signals are enhanced at the same time.  We have identified much more of the older components that contribute to noise generation in the detector, we have replaced these noisy and detrimental components for newer ones that make the the performance utterly fantastic.

If you "Really" want the Worlds best detector then the newest upgrades are the way to go.   To give you an idea on how good the latest upgrades perform..  Using a GPX5000 with 10" X 5" Commander DD coil in any timing with factory default settings.  0.06 gram  Standard detector : Rub it on the coil to get some response.  After the Noise reduction and component changes : 5-6 cm    0.1 gram  Standard : 8-9 cm  Upgrades : 12-13 cm and this is not with the variable gain mod or frequency mod being fitted! 

These will be know as the 2016 upgrades.

If you see a cheap GPX-4500 or a cheap GPX-5000 it might be a good idea to hold onto it, I have been very busy working away on some changes to the circuitry that makes a very big difference to depth, by careful component selection and additional active filters we can remove a lot more ground noise while cutting out the radio interference while increasing the input gain to get greater sensitivity and depth. More to come after Beta testing. The current upgrades allow you to get the relative same performance as a SDC2300 without the coil size and type restriction. Depths greater than the GPZ-7000 are obtained and also no coil size restriction.

These were 6 months in the design testing and manufacture,  watch the video , it says it easier than typing it all out.

General Discussion / Can a modded GPX beat the SDC2300 and GPZ7000?
« on: October 15, 2015, 06:53:41 pm »
Our latest testing with the Sunbury metal detecting club shows that a modded GPX4500 has greater detection depth than the GPZ7000,  that is not all, the GPZ7000 had a 14" coil but the modded GPX4500 had an 8"   yes only 8 inch mono coil.  The target tested was a natural 3 ounce gold nugget.  The GPX4500 in high frequency modded mode eats the SDC2300 on small gold at greater depth. The front end dual channel tracking variable gain mod and the variable frequency mods are opening up old detected ground and is producing nuggets missed by other detectors. 

General Discussion / About time , new patents granted
« on: October 15, 2015, 06:47:01 pm »
Been waiting for a long time to get this one done.

Well its been an interesting time, I've purchased a lot of new test equipment including low frequency FFT analysers, super fast 400 Mhz Oscilloscope, Frequency/function generators, Low frequency spectrum analyser, low frequency network analyser, differential noise analyser and 5 Msp digital oscilloscope. The most cutting edge circuitry is being worked on to improve all gp and gpx detector several orders of magnitude.    We have a hell of a lot of improvements coming for the next detecting season.  Input noise is now 6 decibels lower and this is a huge improvement on existing stock standard detectors.

All fixed,,,, Thanks Jason.

Lets look at a GPX5000 and see what some changes to the operating parameters does to the detector.
Same is applicable to SD2100 SD2200 GP Extreme GP 3000 GP 3500 GPX 4000 GPX 4500 GPX 4800 GPX 5000

Technical / New GPX-4500 GPX-5000 Mods...
« on: February 15, 2015, 12:13:01 am »
Looks like we can get  40% plus on big targets with our newest mods... 40% also on small Gold.  Just need some field testing done...

This applicable to all GPX GP and SD2100 SD2200  detectors.

More information to be released via the news subsrciption on the home page.

Soon to be available is an upgrade that will allow GP and GPX series detectors to detect small gold similar to the capabilities of the SDC2300.

The Class D amplifier was a great idea but the problem was increased interference when using a large coil, Class A B amplifiers that use common amplifier topography generate high levels of hiss type background noise and this is particularly bad using metal detectors with low threshold volume.  We came up with a high quality class B design that has next to zero hiss and generates no extra noise. It only draws 5 milli amps with no input and thus has no noticeable effect on battery drain. This is a winner, to be released soon.

General Discussion / We have a Facebook page
« on: August 09, 2014, 03:16:01 pm »
We have a Facebook page/forum if you want to join, it's a closed group so if you want to post and stay hidden from the public gaze then come and join  There are 2666 members..

New Detector accessories / Interference filter
« on: August 09, 2014, 07:55:27 am »
I just finished a video on the interference filter i have been developing over the last few months.

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