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Minelab GP 3000 Gold Nugget Detector

Minelab GP 3000 Gold Nugget Metal Detector

The Minelab GP 3000 detector was released in April 2003 and is no longer in production. I got one the same year and that detector sure did find gold for me! See GP 3000 & MXT Get Fortymile Gold and Minelab GP 3000 at Moore Creek, Alaska plus Moore Creek Permits & Gold at Steve's Mining Journal.

The Minelab series of pulse induction (PI) metal detectors starting with the SD 2000 are widely acknowledged as being the most powerful gold nugget prospecting detectors currently available. The GP 3000 is a variant in the series. See Steve's Guide to Differences of Minelab SD, GP, & GPX for details.

The GP 3000 was an improvement on the earlier SD 2200D and GP Extreme models, both of which I also owned. Minelab set the bar rather low with the introduction of the GP 3000. All that was touted was "NEW Low-Noise circuitry, NEW battery harness, and a NEW "Smart Point" diagnostic port". OK, new harness, nice, but no big deal. A diagnostic port? Nice for the service department but does nothing for my detecting. There is so little difference between the GP Extreme and the GP 3000 that if you download the GP 3000 Instruction Manual below you will see it is just a modified GP Extreme manual. It even refers to the unit as a GP Extreme in a couple places!

One oddity about the Minelab detectors that bears mentioning is that the Minelab coils are only water resistant. They should not be submerged. There are fully waterproof aftermarket coils available along with external speakers for those who do not want to use headphones.

For me the only real improvement was in the stability of the threshold tone, presumably from the low noise circuitry. The earlier Minelabs had a distinct "warble" in the threshold tone. A smooth threshold sound is critical to allow very faint signals from very small of very deep gold nuggets to be easily discerned. The uneven threshold in the earlier models could cause faint signals to be missed. This small but very important improvement was more than enough to make me happy I had upgraded to the GP 3000. The detector paid for itself many times over.

Download the Minelab GP 3000 Instruction Manual Here

Minelab GP 3000 Technical Specifications*
Internet Price No longer available new - was MSRP $3495 later increased to $3650
Technology Ground Balancing Pulse Induction (GBPI)
Frequency 1100-4500 PPS?
Autotune Mode(s) Slow Motion
Ground Rejection Tracking and Fixed
Soil Adjust (Sensitive/Normal/Salt) Three position switch
Discrimination (All Metal/Iron Disc) Two position switch
Volume Control One turn control
Threshold Control One turn control
Tone Adjust One turn control
Audio Boost (Shallow/Normal/Deep) Three position switch
Frequency Offset Automatic Tune push switch
Pinpoint Mode No
Audio Output 1/4" headphone socket (No speaker) Headphones supplied
Hip Mount Shaft Mount Only
Standard Search Coil(s) Extreme 1100 11" round (Double D)
Extreme 1800 18" round (Double D)
Optional Search Coils Over 100 accessory coils available
Battery Rechargeable 6VDC 12A/hr sealed lead acid
Operating Time 14 - 15 hours
Weight 5.3 pounds (w/11" coil, excluding battery)
Additional Technology Multi Period Sensing (MPS)
Dual Voltage Technology (DVT)
Level Adjust - one turn control
Signal Pitch - one turn control
Coil (Double D/Mono/Cancel) - 3 pos. switch
Notes The GP 3000 employs an external battery carried on a backpack harness and connected to the control box via a power cord. The detector is normally suspended from the harness with a bungee cord, allowing for nearly weightless operation in level ground.

*Notes on Technical Specifications - Detailed notes about the specifications listed in this chart.

Minelab GP 3000 Front Panel
Minelab GP 3000 Front Control Panel (from owner's manual)
Minelab GP 3000 Rear Panel
Minelab GP 3000 Rear Control Panel (from owner's manual)