||9 x 8
Frequency Target ID Tones.
|| Approx. 350
to 800 Hz
Frequency All Metal VCO....
|| Approx. 350
to 950 Hz
speaker and head-phone jack
||¼” stereo plug
(may vary slightly).............
||Eight AA (alkaline)
||10 to 20 hours
|| 30° to 100°
||0 to 75% R.H.
|| No Motion All
The Cortés represents the best combination
of current and new technologies that Tesoro has to offer.
When Jack Gifford and Vince Gifford set out to create
a new target ID machine they each brought with them
different experience. Jack has over twenty-five years
experience designing some of the best analog detectors
that have been on the market. Vince brought with him
a decade of computer systems experience. Together, they
have been creating new technology that gives our detectors
superior performance and keeps them easy to use. Various
parts of this technology have been finding it's way
into Tesoro detectors since the introduction of the
Golden µMax. The new Cortés represents all phases of
our new microprocessor technology combined with our
tried and true analog circuits to create a detector
that has all of the high end features our customers
have asked for with user friendly Tesoro controls.
The first thing that you will notice
is the control box and battery holder configuration.
The µMax housing was just not big enough to hold the
new circuit board so we moved the batteries down under
the arm bracket and increased the size of the box slightly.
This allows us to use a 12 volt system to work with
the demands of the target ID circuitry. It also gave
us the ability to put a 2¼" speaker on the Cortés. This
will give better and louder target signals in the field.
The Cortés' 2x16 character LCD display
will catch your eye as well. This area is the information
center of the detector. The top row is an alpha/numeric
display that gives a broad indication of your possible
target. One of five different categories are displayed.
Also if the target is overdriving the circuits, the
display will tell you to lift the coil for a more accurate
reading. The alpha/numeric and bar graph section of
the display will remain blank until the coil passes
over a target. After the detectorist has decided to
dig or ignore the target the display will clear itself
after six seconds of not receiving a signal. The display
works in all modes, regardless of the discrimination
setting. By clearing the display after six seconds the
user is able to tell if has passed over a new target
that may have been discriminated out. The detector may
not produce an audio signal, but the display will show
a target reading. The detectorist then has the choice
to either go back and check the target or ignore it.
The bottom half of the display contains
the real nuts and bolts information that will help you
to work the Cortés to its fullest extent. The far right
hand part of the display is a battery level indicator.
This gives an accurate measure of your current battery
level. On the far left-hand side is the probable depth
indicator. The Cortés uses the phase shift of the target
to determine the probable target and then looks at the
amplitude of the signal to determine the depth. For
example: a nickel and a quarter are in the ground and
the quarter is deeper than the nickel; if we just went
off of amplitude change, the detector may read the two
targets as being the same depth. However, the Cortés
would show the quarter as being deeper because its phase
shift response is different than that of the nickel.
In the center of the lower display
is a nine segment bar graph display. The different segments
represent the following possible targets: iron; foil:
nickel; round tab; square tab; zinc penny; copper penny
and dime; quarter; half and dollar. The graph shows
what the coil saw during the entire sweep of the coil.
The targets metal composition and orientation in the
ground can cause "smearing" or possible indication in
more than one graph segment. For example: pull tabs
usually will not respond in a single segment but give
signals in two or three segments. To help the detectorist
decide on the target, we have also included an ID Number
display next to the bar graph.
The ID Number takes the largest part
of the signal and converts it to a two digit number.
When Vince put together the scale for the ID Number,
he decided to put the most resolution in the middle
range of targets. This is the area where nickels, pull
tabs and gold rings lie. We know that iron will always
be on the low end of the scale and silver coins and
jewelry will always be on the high end. So iron targets
will always give a reading of 0 and silver will always
give a reading of 95. The Cortés now gives you the ability
to decide what you want to dig. One of the hardest parts
of designing detectors is the fact that pull tabs can
vary from place to place. But a hunter working in the
same area can use the ID Number to learn the characteristics
of the local pull tabs and effectively ignore them.
For those detectorists that prefer
a notch filter discrimination, we have also added a
simple flip switch to activate either a narrow or wide
notch window. When the display is blanked, two "N"s
or three "W"s will appear on the screen. The N will
indicate a narrow notch window and will be in the round
tab and square tab portion of the graph segments. The
wide notch window will cause a W to be in the round
tab, square tab and zinc penny segments. These indications
are an easy way to check what part of the scale is being
notched out. The notch indicators will only show when
there is no target under the coil. When there is a target
signal, no matter if the target has been discriminated
or not, the display will show the information of the
The Sum mode is another feature to
help identify targets. While the detector is in either
the Discriminate or All Metal mode, the display shows
the target information from the entire sweep of the
coil. Each time the coil passes over the target the
microprocessor generates a new target ID reading. While
this is nice for general searching, it can be confusing
while pinpointing. This is where the Sum mode becomes
useful. Pushing the springloaded switch into the Sum
mode causes the detector to start a multi-tone ID and
averages all of the coil passes over the target. The
tone ID has nine different tones and relates directly
to the bar graph segments. The higher up on the graph
the target is, the higher the pitch of the audio signal.
Averaging the coil passes over the target gives the
detectorist the ability to get rid of most of the signal
noise that prevents making an accurate target identification.
Here's how it works: when the detectorist gets a target
signal that he wishes to check out, he pushes and holds
the Mode switch in the Sum position. Shortening his
coil sweep to only a two or four inch sweep he passes
the coil over the target three to seven times. The short
multiple sweeps give the microprocessor the chance to
sum the passes and average them. During the sweeps the
audio ID will start at the lowest signal and will get
progressively higher in pitch until there is no more
change. When this happens the detector is giving the
most accurate ID possible. Then the user can decide
if he wants to dig or ignore the target.
All of these new features are complimented
by Tesoro's easy to use controls. No touch pads or scroll
through menus. Set the detector how you like it by adjusting
the knobs on the front of the machine. The Cortés features
an On/Off Sensitivity knob; a Discriminate Level knob;
a Manual Ground Balance knob; a Mode Switch with All
Metal, Discriminate and Sum mode settings; a Notch Width
switch with Off, Narrow and Wide settings and a Light
switch to control the LCD backlight with a High, Low,
and Off positions.
The Cortés fits into a package that
weighs just less than three pounds (including the batteries!)
and is covered under Tesoro's Lifetime Warranty. The
Tesoro Cortés makes target ID easy and fun. Contact
your local dealer or the factory for more information.