Treasure Talk

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Des Dunne

Des coin hunting
Des has been with Minelab for thirteen years and is based in Cork, Ireland, where he is Minelab's Field Application Specialist. Des has produced many online videos (available at and written a stack of articles for metal detecting magazines. He's a passionate detectorist, world traveler and avid outdoor fanatic with a bent for taking photos! Des's favorite detectors are the Sovereign GT, X-TERRAs and the E-TRAC.


CTX 3030 – Snapshot feature

July 03, 2012 09:16am

The new CTX 3030 has a fantastic feature inbuilt that’s not described in the Instruction Manual. It’s the ‘Snapshot’ feature.

No, the CTX 3030 doesn’t have a camera... well it has... sort of? It’s the next best thing to a camera!

So what is ‘snapshot’ and how does it work?

Posted by Des Dunne on July 03, 2012 09:16am | 0 Comments

Garden jewellery search technique

February 06, 2012 01:03pm

As the owner of a metal detector, sooner or later word gets around that you are ‘the go-to person’ in the event of the loss of a person’s wedding ring or other item of sentimental value jewellery.
Such requests should be welcomed not only because you are helping to reinforce the positive aspects of the hobby in general but the opportunity might also offer new search areas previously unavailable.

Posted by Des Dunne on February 06, 2012 01:03pm | 1 Comment

Detection Depth - Part 2

September 26, 2011 03:40pm

In Part 1 of this blog post I explained why ground mineralisation and the conductivity and mass of a target can affect detection depth. Here’s a couple more factors that are less well known.

Posted by Des Dunne on September 26, 2011 03:40pm | 0 Comments

Detection Depth - Part 1

September 05, 2011 04:38pm

How deep does your metal detecor go?” How many times have you been asked this very question? Explaining how deep our metal detectors will go on small coins and rings is more difficult than it appears at first glance. There are several factors that can combine against you and cause a dramatic depth loss on in-ground targets. Air tests can be educational some of the time and may falsely show one detector to be better than another at finding a coin at twelve inches in-air. But, we don’t detect in air do we? We detect through the ground...

Posted by Des Dunne on September 05, 2011 04:38pm | 0 Comments

Pitch Hold in E-TRAC & Explorer SE Pro

March 11, 2011 02:41pm

The Pitch Hold mode in the Response menu can be a very interesting choice of audio sound to use. While not for the faint-hearted due to its undulating audio, if a person is willing to give it time, the effort in learning its audio nuances will be well worthwhile. Essentially, it works because the pitch of the target signal will hold the Threshold hum sound until the next target is detected. i.e. the threshold mimics or adopts the tone relative to the conductivity of the target.

Posted by Des Dunne on March 11, 2011 02:41pm | 0 Comments

X-TERRA - Which frequency coil should you use?

January 07, 2011 01:15pm

Well, it all depends on what you are looking for? There are three frequencies available: (1) Low, (2) Medium & (3) High.

The Low Frequency of 3kHz would be well suited to searching out metals of a high conductivity such as copper and silver coins. It might be considered a good cache hunting coil. Useful also in hunted out parks for deeper silver coins which are masked by trash items.

The Medium Frequency of 7.5kHz is...

Posted by Des Dunne on January 07, 2011 01:15pm | 3 Comments

Why do coins sink?

November 15, 2010 02:08pm

Several months ago while conducting a routine field test of a Minelab detector, I got a signal from just underneath a fallen log – I moved the log and found a coin target which as it turned out was on the surface hidden from view by just a few leaves – the date was 1946. A few feet away another signal produced a 1986 coin from around the six inch level.

At the time I didn’t think much about it as it was a routine test and many targets were located that day and that’s what I wanted, as many targets as possible to assess the detector.

Posted by Des Dunne on November 15, 2010 02:08pm | 2 Comments

X-TERRA Coil Range

September 13, 2010 11:02am

Why are there so many coils available for the X-TERRA series of detectors?
Good question.

Currently, there are eight coils available to suit your X-TERRA detectors.
All of them do mostly the same, detect metal but a few of them are ‘specialist’ coils more suited to a few tasks “the Pros” or seasoned hunters indulge in!

While there is absolutely nothing wrong with the “stock 9 concentric” that comes as standard kit with a lot of X-TERRA’s, the option to customize your detector without shelling out buckets of money is offered through what’s termed as VFLEX technology available only on the X-TERRA range.

Posted by Des Dunne on September 13, 2010 11:02am | 0 Comments

Excalibur II - a waterproof detector

August 09, 2010 11:25am

Would you ever dream of taking your expensive top of the line metal detector into the water with you? Probably not…it would be a crazy thing to do. But, it wouldn’t be at all out of place if you owned an Excalibur II waterproof underwater metal detector.

I do it frequently…take my Excalibur into the water and enjoy a few hours water hunting and reach areas and things I can’t access on land or the beach for that matter! It’s an absolute great feeling to don the headphones and wade into water with an Excalibur ‘buzzing’ at your side, and best of all is drop the entire thing…yes, even the headphones into the water

Posted by Des Dunne on August 09, 2010 11:25am | 0 Comments

GPX-4500 for Coin & Treasure use

July 19, 2010 09:01am

Have you ever given any thought to using your GPX-4500 for the pursuit of valuable gold and silver coins and other treasures?

One doesn’t have to reserve the GPX-4500 just for gold prospecting! It is a fine general purpose coin machine as well!

There are plenty of valuable single and caches of coins out there to find and the GPX-4500 is perfectly suited to the job e.g. ghost town detecting, cache hunting in rocky mountainous regions of the deserts searching for “Wild West” stage coach and bank robbery caches, treasures deposited in Europe during the two world wars and in the former ‘Iron Curtain’ regions of the former USSR. 

Posted by Des Dunne on July 19, 2010 09:01am | 0 Comments
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