Minelab GP 3500 gold metal detector

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The Minelab GP 3500

MORE POWER AND VERSATILITY WITH THESE NEW HIGH PERFORMANCE FEATURES:

NEW “Quick-Trak” remote Ground Balance “Tracking “ and “Fixed” mode!

NEW Manual Frequency Band Adjustment!

NEW 3 Speed Tracking- FAST, MEDIUM and SLOW Modes!

NEW Lighter weight, improved performance 11” DD Search Coil!

NEW Optimized PRE-SET level adjust in each tracking speed!

NEW Quick Adjust hand strap! NEW Quick Adjust Bow Knuckle

Simply the WORLD’s MOST ADVANCED and POWERFUL Gold Detector- EVER.

I don't just sell metal detectors- I use them

Call Belda's for sale packages with FREE in field training with lifetime customer support.

866-301-8552 or 541-389-8552

GP 3500 field test

The GP 3500 has been upgraded th the GPX4000

questions? 541-389-8552 866-301-8552	The Minelab GP 3500 MAXIMIZE RESPONSE AND SENSITIVITY - select the tracking speed that’s right for your ground conditions. SLOW/ MEDIUM/ FAST Tracking speeds allow you to customize your GP3500 for optimal performance-EVERY TIME! MORE DEPTH - Spend MORE time detecting in “Fixed” mode, giving you greater depth-- with immediate access to Ground Balance at your fingertip! MORE TARGET SIGNALS THAN EVER! - switch from “Tracking” to “Fixed” INSTANTLY for super accurate signal identification without “balancing out” those faint signals! - PLUS, you’ll have easy and instant access to pinpointing. UNBEATABLE Patented DVT (Dual Voltage Technology) IMPROVED Smoother, More Stable Threshold! IMPROVED 3rd Generation Ground Balance Software! EASIER and MORE VERSATILE OPERATION MORE Depth, Sensitivity and Accuracy, - just a push button away! MORE Depth, Sensitivity and Accuracy, - just a push button away! Multi-function Quick-Trak Remote – The Quick-Trak push button allows the operator to quickly and easily re-ground balance when operating in Fixed mode and vice-versa allowing the operator easy and instant access to Fixed ground balance and pin-point when searching in Tracking. This means convenience, comfort, ease of use AND allows detecting in Fixed mode more often, which means more depth! Manual Tune Control – The manual tuner serves two functions: (1) To gain the most stable, quietest, interference free detecting, the manual tuner can be used to fine tune after using the auto push button. It can also be used to make small changes as you move around. (2) If operating in a quiet environment, the manual tuner can be used to select a specific frequency band to operate in. It is well known that lower frequencies can give a better response to deep targets, while high frequencies can improve sensitivity to small nuggets. (3)-Speed Tracking – In highly variable soils the use of Fixed mode may be impractical, making continuous Tracking mode the preferred method. Now the operator has the choice of THREE tracking speeds to choose from – Slow, Medium and Fast. This allows you to choose the best Tracking Speed for the ground variability, the coil you’re using and your own hunting style. The Tracking sensitivity level, previously controlled by the Level Adjust knob has now been pre-programmed to the optimum level for the Tracking speed selected. This gives you the best operating function to gain improved performance. Re-positioned Controls - the control panel layout has been re-designed to allow for a simpler, logical set-up procedure. Easy Adjust Bow Knuckle – Whenever the operator changes their detecting location or changes their coil, it may be necessary to adjust the position of the Bow Knuckle to a new balance point. The new Bow Knuckle allows for easy re-positioning anytime without extra tools. Improved Smart Point Built in Diagnostic Port – The Smart Point allows Minelab engineers to test and verify your GP3500 is optimized for maximum performance before it leaves the factory. Reduced Weight and Improved Performance 11” Double-D coil - The Minelab 11” Double-D coil is one of the most reliable and versatile coils ever made. Minelab has redesigned the coil so that it is lighter and the internal windings have been modified to improve signal response, depth and sensitivity. Improved Discrimination Software - The discrimination on the GP3500 is now more accurate than ever and able to identify smaller target signals than was possible before now. Technology: Patented DVT (Dual Voltage Technology) Features Length.... Maximum 1300mm .................Minimum 1100mm Weight Complete with 11" coil (excluding battery) 2400g Configuration.............. Shaftmount Technology................... Dual Voltage MPS Technology (DVT) Transmission............... Bi-level Pulse Induction Ground Rejection ........Automatic Ground Balance Search Mode ...............Motion Detector Controls On/Off - Threshold....... Pot with switch Signal ..........................1 turn control Tone.............................. 1 turn control Volume .........................1 turn control Boost........................ 3 pos. switch (Shallow, Normal & Deep) Soil .........................3 pos. switch (Sensitive, Normal & Salt) Tune (auto)................. Push switch Tune (manual) .............Digital pot Iron Discriminate (Disc / All metal).............. Pot with switch Coil .....................3 pos. switch (Double D, M (mono), Cancel) Track Speed (Fast, Medium, Slow) ............3 pos. switch Balance..................... 2 pos. switch (Fixed & Tracking) Audio Output Headphones.... Koss 1/4" (6.35mm) Jack Headphones (Stereo/Mono) Warranty Control Box .................2 years Coi...............................l 1 year
	Minelab GP 3500 detector accessories and parts
	15 Amp 'Dome Top' Battery The 15 Amp 'Dome Top' battery is suitable for all SD and GP series detectors, except the GPX-4000. This battery is used with the curly power cables. Remember it is always a good idea to have two batteries with you when detecting, not only does this give you a spare, but if you swap batteries during the day, you'll always be detecting with full power.
	Battery Backpack The Battery backpack and harness is suitable for use with any SD or GP series detector. Designed for comfort with wide shoulder straps and chest belt, sewn together for easy dressing.
	Bungy Cable Suitable for SD and GP series detectors. This heavy-duty bungy cord supports the weight of the detector and improves your comfort level.
	Commander Coils A completely NEW line of PREMIUM high performance coils- exclusively designed for MINELAB GP and SD Series Gold detectors! Find out more information
	Mains Charger (4-pin) This mains charger is designed for use with the SD and GP series detectors. This charger is a "smart" regulated charger that stops charging when the battery is fully charged, extending the life of your battery. The charger has an indicator light fitted which indicates the charge of the battery.
	Padded Comforter Belt This new padded waist belt makes wearing the battery harness all the more comfortable, you won't notice that you have it on.
	Power Lead Suitable for all SD and GP series detectors, this curly power lead is for dome-top batteries. Designed for convenience so that you can place your detector on the ground and the cord will stretch, and using it as normal will see the power lead in the retracted position. This allows hassle free detecting with no power leads to get caught in shrubs or under your feet!
	Carry Bag This newly redesigned carry bag is suitable for all of Minelab's detectors. This tough padded bag is ideal for storing and transporting your Minelab detector. Extra width at the front of the bag will allow it to fit additional coils.
	Koss Headphones (100 Ohm) The Koss headphones have been custom built for Minelab. These excellent headphones give you a crisp clear 100 Ohm signal, lovely padded muffs that eliminate outside noise and are very comfortable to wear all day long. Supplied with a curly cord for safe flexible length.
	RPG Headphones (32 Ohm) Suitable for most detectors, these robust headphones provide a good clear signal, with volume control, straight lead and 1/4" jack.

Field Test - GP 3500

The GP 3500 – THE detector for the serious prospector

Building on the solid platform of the GP3000, the GP3500 is Minelab’s latest Gold Detector to utilize DVT, or Dual Voltage Technology. At first glance the differences between the GP3500 and the GP3000 may seem minor but there are several new benefits, which should result in more gold in your pouch at the end of your trip.

Here is a list of new features for the GP3500:

Quick-Trak Ground Balance reset/fix button on handle

3 Tracking Speeds – Fast, Medium, Slow

Optimized pre-set Tracking sensitivity level

Improved Discrimination

Reduced coil weight with improved ground handling ability

Manual & automatic Frequency Band adjust

Quick adjust hand strap

Quick adjust bow knuckle

Improved control panel layout

At first glance, the advantages of these features may not be evident, and most operators will ask, "So how will they help me find more gold?" The benefits of each new feature are explained below.

Quick-Trak button

The first feature is the all-new Quick-Trak button. It is no secret that a Mono-loop coil is the preferred choice in terms of depth and sensitivity, and the DVT technology on the GP series have opened up a lot of areas that were previously strictly Double-D territory! As a result, some operators will stick to their beloved Mono-loop coils in the most variable ground, where even whilst searching in Tracking, they have to occasionally reset the ground balance by flicking to Fixed then back to Tracking to engage the 5sec fast-track. However, if I am having to re-ground balance too often, the first thing I used to do is switch to a Double-D coil. I know of ground where a Mono coil needs to be rebalanced every 2 - 4 meters, but if I put on a Double-D, I can run in fixed for most of the day, simply ignoring the occasional false signal. The only problem is that the spot is a proven nugget producer, and like many others around the country has been well worked by detector operators. The trick to pulling more gold out of these areas is to successfully use a Mono coil to ensure maximum depth and sensitivity.

It is in this kind of ground that with the GP3500, an operator will be able to stick to their preferred Mono coil, as the control is right at your fingertips and re-ground balancing is now so simple. Because of the simplicity of it, even when using a Double-D coil, you will re-ground balance more often ensuring maximum stability/sensitivity at all times. Another great feature is that whilst in Tracking (on the control panel switch) if you push down the button, it pauses the ground balance function (places it into Fixed), which can be used to pinpoint a target, or when investigating faint signals. When releasing the button it will engage a short 2-3 sec fast track. The beauty of this is that you can search in a slower track speed (see below) to ensure a better target response, and use the button as a GB reset if you go through a rapid mineralization change, or if the GB has been upset in the process of recovering a target. This is also handy for when detecting very cluttered areas, where you are constantly required to raise the coil over obstacles such as logs and rocks. Just press the button before raising the coil, and then release it when the coil is on the ground again and your detector will remain perfectly ground balanced.

3-Speed Tracking

Even though the Quick-Trak button makes running in Fixed a lot easier, there will still be situations where running in Tracking will be more efficient. To give the operator more flexibility to suit different coils and soil conditions, the GP3500 has 3 Tracking speeds to choose from.

If you are detecting in fairly consistent mineralization or "homogeneous ground" then you can run in the Slow track speed where the detector is a little more cautious, and will stop a lot more on signals it thinks may be a target. This is important when patch finding, as a rapid change in mineralization can alert you to a productive area. Then after a nugget is located you can flick to Fixed, slow down your sweep speed, and start listening to those faint gold nugget signals.

Medium Tracking will effectively handle most mineralization changes, and will require repeated sweeps over faint signals in order to track them out. In variable ground Medium has a good compromise between effective ground balance, and signal response, and will become the preferred setting for most operators, particularly Mono users, or operators who like swinging the 18" Double -D looking for virgin patches.

Fast is a specialty setting for handling heavy variable mineralization, and should only be used if Medium Tracking is not sufficient. In a lot of variable ground it may be better to search in Medium, and use the Quick-Trak button to re-set the ground balance as required, before deciding to search in Fast track. If operating in Fast track, then it is important to Fix the Tracking by pushing the Quick-Trak button when investigation a faint signal, or when pinpointing.

Simplified Level Adjust

On previous models, the Level Adjust controlled the Discrimination level, and also set the Tracking sensitivity. This had its limitations if you wished to use Discrimination and Tracking simultaneously, and there was a chance that the operator had the Tracking incorrectly set. The addition of the three track speeds on the GP3500 gave Minelab the opportunity to simplify this by presetting the Tracking sensitivity to its optimum level, allowing the Level Adjust to control the discrimination level only.

This has take the confusion and guess work away, allowing a quick and accurate set-up of your detector.

Improved Discrimination

The simplification of the Level Adjust as explained above, meant that Minelab’s team of engineers could refine the computer software that governs the discrimination function. You will find that the iron ID on the GP 3500 is more accurate, and able to identify on smaller target signals than was possible on previous models. This means more gold from those very trashy sites!

Improved Coil

The Minelab standard issue 11" DD coil is one of the most reliable and versatile coils ever made and although this new coil may look the same externally, a lot of work went into making it even better. The coil features a new lightweight core, improved shielding and a Minelab specified grade of Litz wire, for a highly efficient coil for its size. The internal windings have also been modified to ensure perfect ground balance to maximize depth, which has also resulted in an increase in signal response to small nuggets closer to the surface.

Manual Frequency Adjust

Due to the power and broad operating frequency range of the SD and GP range of detectors, the influence of external electrical interference is a problem that is a nuisance in many areas. In most situations the Auto Tune function selects a quite band, and the operator doesn’t need to change this unless moving to a new location. However, in some areas, particularly those goldfields close to suburbia, or for operators wishing to use their gold detector for other applications such as Relic Hunting or Beach Hunting, the source of interference can change often requiring periodic changes to the Frequency Band.

The GP3500 can handle these changes with ease due to the addition of a Manual frequency band adjust, in addition to the Auto tune function. After the initial band is selected using the Auto tune, if the threshold becomes unstable during searching, all it normally takes is a slight turn of the Manual Adjust knob, and the threshold returns to a smooth tone, so you can get on with your detecting.

For operators detecting in areas with very little electrical activity, you may find that a particular frequency band works better on a specific target size, or in a specific soil type. There are no hard and fast rules here, so when you receive a faint signal, before recovering it, it may pay to experiment with the Manual adjust control to see if a different frequency provides you with a better signal response.

Quick Adjust Bow Knuckle & Hand Strap

I’ve said it many times before, and I’ll say it again, a comfortable prospector is a successful prospector. And by comfortable I’m talking about a whole range of things like: ensuring you’ve had enough sleep; that you are appropriately dressed; you have enough drinking water; you are wearing inset repellent; you have comfortable footwear; you’re not swinging a coil that is too heavy or unbalanced; and ensuring your harness is properly set up. These are all important aspects to staying focused and concentrating at listening to what the detector is telling you.

The new Quick Adjust features fall into this "comfort" category, and have been incorporated into the new GP3500 to make life that little bit easier. The old metal bolt in the bow knuckle has been replaced by a plastic bolt and wing nut, so that you can change the position of your bow knuckle in seconds. This is usually necessary when swapping coils. The quick adjust hand strap is also handy if you are wearing gloves whilst detecting on a chilly morning, and then need to re-adjust the strain of the strap after you no longer need them.

Re-positioned controls

The changes and new features have allowed us to redesign the control panel to make the set-up procedure more logical and practical for the operator. The power switch has moved to be on the threshold control pot. Just turn the detector on and select the threshold level at the same time. The All Metal / Discrimination switch has now been incorporated in with the discrimination level knob. The Soil & Boost switches are now next to each other, as these two settings tend to be used in various combinations, it is more convenient to have them located together.

The GP3500 Advantage

The increased versatility of the GP3500 allows it to be optimized to suit any detecting conditions you encounter, and to suit your personal detecting style. The new time saving features, and the ability to control what the detector does, when YOU want, will result in more gold at the end of the day.

Nenad Lonic

Minelab Customer & Technical Support

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