Minelab metal/Gold detector modifications SD2000 SD2100 SD2100E SD2200 SD2200V2 GP Extreme GP3000 GP3500 GPX4000 GPX4500
This is how I make my own Large Coils, the Frame is made from 6mm X 10mm Kiln dried Pine, I stick it together with Liquid Nails.I make my coils in a Hexagon shape as it is very easy to do. This massive coil can be lifted on my little Finger it is so light. The coil is cable tied to the outside of the frame. It just needs some center mounts made from strips of wood and away we go. For extra strength the structure can be fiber glassed if you want. This is the way to make huge Deep seeking coils without the $1000 price tag.
These coils can be mounted to your own frame, either Plywood or a light braced Pine frame. They can be shaped as a Round or whatever takes your fancy.
Modded SD2200D Strikes Gold
Today 21st January 2010
The prospector and the Club members have gone over this patch for some years, using every detector from the SD2000 up to the GPX-4500. As not to rain on his parade, I am not going to give away any details until it is released in the Club's Newsletter.
Well, I feel for Warren, he was pipped at the post by someone who found an old coin. The Crystal 8 gram Nugget was a excellent specimen, when I catch up with him I will post up the picture of the Gold.
January 2010 New Battery Amplifier combo for all SD GP and GPX detectors..
I now have a amplifier speaker Combo that will be made available shortly, this one uses a small speaker so it does not alert every Tom Dick and Harry in the area of your finds. It uses 2 small self contained AAA batteries that last an extremely long time. More info will be available after the field testers report back.
The battery can be mounted with Velcro to the side of the detector and the small amplifier and Speaker can be mounted to the battery or the detector with velcro as well.These are going to be cheap, the cheapest on the market.
Update N.O 2 December. I have just received a completely new batch of Ultrafast Soft Recovery rectifiers that have 30% more current carrying ability than the MUR320S types that Minelab use. The new types have less forward voltage drop and that means more current to your coil for greater depth. Last but not least is the intrinsic capacitance is less than half of the MUR320S and this reduces capacitive loading of the coil and receiver stage to allow faster sampling and greater signal levels. Being a Soft recovery rectifier means less switching noise and greater signal to noise ratio. These new components have been tested on SD GP and GPX detectors and have been found to offer a performance advantage.
Update December- "The best GPX-4500 Settings"
Click Here for the Best GPX4500 Adjustments. Test these against the settings suggested in the Outback Prospector Video's, it will make you think twice!
Update 13th November 09
Component upgrades for the GPX-4500.
New Receiver section components are just in, this gives even lower on resistance, less capacitance to the input stage and will result in more signal and deeper Gold. By lowering the Capacitance, larger coils should be much quieter on both Enhance and Normal mode.
We are the only ones to have these components as they are special order to our specifications.
We also have some Orange Display modules that allow much improved visibility in bright sunlight.
So if you want an Orange Daylight display fitted or a DIY module send me an email.
New upgrades for the SD and GP range of Minelab Gold detectors. 9th/Oct/2009.
We can now match or even better the receiver sensitivity of the newest Minelab detectors. We have upgrade components that greatly improve the detection depth on the SD and GP detectors. The best way to get extra depth and sensitivity is so improve the receiver signal to noise ratio. We can acheive a 3db improvement in the current noise figure of the receiver front end that give a huge improvement in sensitivity and depth. No one else offers these upgrades as they have been engineered and tested by myself to be the best that there is currently available.
We are currently having some GPX4500 detectors field tested with upgraded components and expect field test reports back in a couple of weeks.
New Minelab type Coils to be Released.
A New Range of Coils are to be released shortly, The first coils will be Mono in a range of 6" up to 48" The coils will need to be mounted on some Plywood if you want a Tow Coil or on a bit of plastic if you want to make your own normal type Coil. These coils can be supplied as Round, Square, Oval or Rectangular.
I would envisage "Huge Cost Savings" for those that can mount their own coil. We will then be moving into the supplying of Coil Shells as we have them manufactured. Eventually we will supply complete coils including some new patented designs.
This is the new Mono Coil Cable that is now available, specs are on Ebay . If you want a few meters do not buy it from Ebay as I can do it cheaper if you just use Paypal, money order,Gold or Cash.Oz. Cable direct is $10 per meter and postage is $5.00 Flat rate.
World-Wide is $9.20 USD per meter and $8 USD post flat rate.
Use Paypal via my email vk3kcg@amsat.org
UPDATE ! New Mods Are Available for GP and GPX Series!
These picture have been sent to me by prospectors that are using a Minelab detector that has been upgraded by myself. The one on the left is from New Zealand where the Gold won by a single SD2200D was far more than the total of 5 experienced prospectors each using a GPX4500 . Thanks Bevan.
This is the email I received from Andrew who was on a prospecting trip to Tibboburra NSW. This came with the Photo on the Right.
Now that I have put these pictures up it will cause great uproar in attempt to save face and protect commercial interests, this a cold hard fact but the pictures and correspondence is 100% true and correct. It is word for word from the owners of these detectors.
I have changed one word in (brackets).
Hi
Just an update on the modified extreme...
I also have these packs available for the GPX4000 and GPX4500, I am now supplying the 7.8 Ah battery with these kits. The Battery is labeled 7.2 volts but it charges to 8.4 Volts, exactly the same type of Cells used in a genuine Minelab Battery. I am selling these well below half price than others on the market.
Above is the Light Weight Lithium Battery with Mains and Car Charger to suit the SD2000, SD2100, SD2200, GP Extreme, GP3000 and GP3500 Minelab detectors. The Battery is 7.4 Volt 7.2 Amp Hour and weighs just over 300 grams. Also included is a Universal power adapter so you can charge the detector in any Country. The Mains charger will work off 110 Volts to 240 volts mains! I have used this battery on my detector and it runs all day on one charge.
To make your detector leadless I velcro the battery to the side of the detector and connect by audio booster to the battery and mount my speaker on the arm rest. This allows the whole detector to be used without a back pack or any connecting wires to you. The battery is very light and the weight is only 300 grams.
If you want a pack send an order via paypal using my email vk3kcg@amsat.org
For all sales in Australia the total price is $158 and that includes delivery.
For sales Wotrld-Wide the total price is $158 USD and that includes delivery.
Repair your own detector! Repair kits are now available for SD GP GPX detectors.
Contact me on 03 90175549 if you want to pay via bank deposit.
The new upgrades for the SD GP series and GPX series detectors are pulling more Gold from old worked patches. We keep in contact with prospectors using the upgraded detectors. There is many instances of upgraded detectors getting a lot more missed Gold by going over previously worked ground. I have put up some new vids on Youtube for anyone that is interested in doing some preventative maintenance on their GPX-4000 and GPX-4500. Check Out the photo Page for some pictures of Gold found in Australia and the USA.
August 2009 Updates,
*15th June 2009 Update*
On the 13th June we carried out more testing with a new series of Mods at the Laanacoorie Test site and at the Daisy Hill Gold field near Maryborough.
The information that we gained tells us that the new series of mods are very good indeed. In very well worked ground at Daisy Hill a 0.9 gram Nugget was found at 9 inches in red clay using a Modded GP detector with a 10 X 5 inch Coiltek Mono Coil, the control detector (Standard) could not detect the target at all.
One of the main goals with Minelab detectors has been to stabilize the threshold so that target signals are not hidden in the noise. A lot of the noise generated in the Extreme GP-3000 and GP-3500 has more to do with the interaction between the power output stage and the receiver stage. We can reduce the threshold warble so that the detector is rock solid stable!
I have made quite a few video's on the Minelab Pulse Induction Detectors,
Have a look at my YouTube Video's at, http://www.youtube.com/user/woodypoopoo
Why Woodypoopoo ? When I was trying to register an account everything I tried was taken, out of frustration I typed woodypoo and that was taken..so I typed woodypoopoo and it was available. So now I am stuck with it as YouTube will not allow me to change it. So I have to live with it. I may change it one day but that involves reloading the video's.
This is a new Detector that has been developed in Australia, the performance rivals the GPX4500 in terms of depth and is totally imune to Power Line interference. The price of this detector is expected to be a fraction of the price that Minelab charge. This detector is real and I personally have seen it in action. It is a very impressive detector. It is also designed to use standard Minelab type coils. It may be some time before this detector is made available so in the mean time get yourself a SD or GP Minelab and have it upgraded.
This is a Gold Nugget from the Goldfields of Thailand, a generous prospector sent me this for doing some work on his SD-2100. He was getting a lot of Gold from his patch, 260 grams in one hole at 2' deep. This one is 12 grams. Thanks Paul.Join the prospecting forum to see all the pictures of prospecting in Thailand.
You will have to Join the Forum to View the Links.
Here is a Link to a Report on a Modded SD2100 being used in Thailand, Note the ground was already worked with a GPX4000 !
The amount of Gold coming out of the ground tells the story.
http://www.invisionplus.net/forums/index.php?mforum=goldprospecting&showtopic=2733&st=0&#entry7304
This site is here to show you how to modify and carry out simple repairs on Minelab Metal Detectors. I offer a modification service for all the Minelab P.I detectors. The list of mods is growing all the time as we carry out different circuit changes to field test.
All the mods will definately improve you chances of finding Gold Nuggets of all Sizes. There is NO detector available that can beat the depth on the modded detector!
Check out all my Video on Youtube as there is a lot of helpful info that you can use.
Check out the Detector Video's on Youtube...
http://www.youtube.com/user/woodypoopoo
Contact : vk3kcg (at) amsat.org The (at) = @ Its to stop spammers. You can also contact me via my Ebay username Metaldetector on Ebay.
Woody
Who is Woody? My real name is Peter. I have been running Link Technologies for 25 years. Ive been an electronics Engineer for 28 years. Specializing in Radio Communications and Analogue systems. Design and development of everything from Tube audio amps to space based Satellite power amplifiers and low noise receivers. Now heavily into Pulse Induction metal detectors. Just completed a ground loop system, it can detect a Coke can sized object at 6.5 ft or over 2 Meters.
