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Test Report - Tesoro Tejon

Tesoro Tejon UK - by Matt Renshaw
  (abridged version reproduced by kind permission of Treasure Hunting magazine)
This article is all about “shaking down” the latest Tesoro TEJON, which I have on loan to test, together with four accessory search heads. Three of these are of the Double D variety and one Concentric. I’ve never owned any of the previous models of this brand of detectors, but years ago I detected in the
company of a friend who was a great fan of the Tesoro and Laser series machines.
I recall several occasions when we would tip our finds bags out to compare what each had managed to find. What never failed to intrigue and impress me was the high target count that Tesoros produced, especially cut hammered, compared to the other detectors sharing its company. Some of these had assumed “superior” assets, such as a larger search head size, VDI target identification, dual frequencies, digital-selectable-discrimination etc.
I was always envious of the Tesoro’s light weight. Two decades later I was about to personally discover what it is that continues to make this series of apparently uncomplicated detectors so enduringly popular.
I decided to nip down to a shore location to give the Tejon a taste of our local stony beach, and to see how effectively its “three turns” GB control coped with the forbidding and ever changing “kaleidoscope” of rocks.
Late on, in the pleasant cool of the evening, I arrived there and set up the GB as best I could to cancel the conglomeration of stones (rather than the dry sand and clay on which they rested).
My planned settings for the detector were:
Primary Mode. Switch off DISC-1 and engage All Metal.
Secondary Mode. Set DISC-2 just below the 5 cent mark, for analytical purposes.
So, with magnetic rocks ground balanced for minimum effect, I would be primarily monitoring for any metallic targets – initially analysing them by varying sweep speed and lifting the search head while judging the width and relative softness of the audio. Any target which passed that test was then further checked by using the trigger forward DISC-2. That then should silence any small hot rocks and low conductive trash masquerading as a good target. Finally, what was left would then be recovered for a final visual assessment. It’s a very demanding discipline, and not always rewarding in terms of pro-rata effort expended; but it hones your skills and teaches you patience.
Often, I have come home with nothing but copper rivets and brass screws etc. One this occasion I managed to pull up a gold ring. Although it was small and of low carat the Tejon’s tenacious abilities clawed this low conductivity target from a challenging situation. I attribute that to the “expanded ground balance” function and “triple mode” choice of settings available on the Tejon. At that time I was using the 5.75 inch widescan search head, and sweeping at about 6inches above beach level to avoid colliding with stones.
It proved to be a rewarding setup, which helped me to find several coins as well as the gold ring in what is normally a tough situation for those other detectors which I’ve experimentally tried there. I must emphasise the fact that the Tejon’s sensitivity was only running at 20% of its full gain! The machine is incredibly sensitive, and yet so stable.
The Tejon’s fine performance carried over well to the field searching episodes. On those occasions I generally used the larger 12 inch x 10 inch DD coil or the 9 inch concentric, occasionally switching over to the white 8.5 inch DD coil. All four coils were field tested and – strange as it might seem – the smallest 5.75 inch widescan has become my favourite. As a result of its convenient weight and target appetite, it packs the most punch for its size. It pinpoints on the fly, and sorts its way through the clutter like a laser (no pun intended).
A trip down south into Wales gave me the fortunate opportunity to detect a productive site. The friends who invited me each owned a Deus, and they have been doing very well regarding Roman artefacts. I wondered if I was on a wild goose chase in view of that French competitor!
It was therefore with trepidation that I followed them on quite a long trek to a set of fields that were different from those searched on my first visit. My search started encouragingly, with bits of lead and a few buttons, although coke was a nuisance.  After about 90 minutes of doggedly sticking to the task, my Tejon made a fine recovery. It was a hammered groat recovered at about 7 inches in what I thought was difficult ground mainly due to natural ore and stones.
Spurred on by that and a coffee from the small flask I had brought along due to the long walk from base, I began detecting again daydreaming of finding a hoard. Thirty minutes later the Tejon’s audio snapped me out of my trance, and literally pounced on a target, which turned out to be a small hammered penny. It was only 4 inches deep and hiding close to an old dry stone wall. Once more the 5.75 inch widescan was proving its worth.
I eventually made my way back to my hosts to show them my finds and report their locations. They, too, had been successful, having recovered a couple of Roman coins and a fine fibula. They showed me the area where they had previously recovered most of their Roman finds. As is their generous nature, they invited me to try out the Tejon along with them. I managed one tiny bronze coin, no bigger than a finger nail, and I donated it to their growing collection. My hosts were impressed by the Tejon’s success.
On the drive home I contemplated the day’s searching using the Tesoro, to a previous visit there with a different brand of detector (which is undisputedly more theoretically advanced, and heavier). On that occasion I was not as fortunate as I was today.
Normally, the”iffy” audio that most detectors produce for targets at the extremes of their capture range, are often ignored as unreliable or unconvincing. The Tejon’s dual ED180 circuitry transforms that “uncertainty” into a positive response, dynamically adding extended range in any situation that supports its capabilities. I have spent some time to both air test and in-ground test all four searchcoils using a range of six modern coins as my standards. The Tejon’s super sensitivity seemed to mock my normal assessment methods.
This assignment has been a long but enjoyable one. The resulting conclusion is that the Tesoro Tejon has proven itself to be one very hot detector in terms of its ability to tell you where the metal is. It does that more positively than many of its lauded competitors, often when using a smaller sized searchhead!
As the Australians would say “It’s a ripper”. As for this unit’s “speed”? None of the fast machines I’ve used would outperform the Tejon in the context of target separation.
Normal usage in the field initially requires you to spend a few minutes Ground Balancing over a “clear” spot, in All Metal, as accurately as possible. Thereafter whilst hunting (assuming you are now in discriminating mode), occasionally pull the trigger and pump the coil to re-check your GB setting’s effectiveness. If there are any audible indications of ground changes the GB knob can easily be tweaked “on-the-fly”, using your thumb, to restore the optimum balance.
Folks, it’s time to close this report. All that’s left for me to say is that the Tejon has the sparkiness of a Mustang and the kick of a mule; but if handled well, it will give other thoroughbreds and their owners, a run for their money.
Pentechnic     Metal Detector Sales – Service – Repairs
Tel: 01785 714373   email:
The Tejon is a fantastic detector and Pentechnic can offer a Professional upgrade which gives you the choice of either FIXED (turn-on-and-go) or ADJUSTABLE (for maximum performance) ground cancel.