when determining if a target is worth recovering. In addition, the relic mode operates with a
mixed-mode audio signal in which a low tone is produced for rejected targets and a high tone
for accepted targets. This means that all targets under the coil produce a signal; however,
unwanted targets can be ignored based on tone and/or meter indication. Both the coin and
jewelry and relic modes have 16 LCD segments that appear beneath the VDI number and
target ID label. These segments allow the user to check the target ID independently by using
the chart below the LCD screen. The size of the block also provides additional information to
help the user. If the block is full height, the MXT is fairly certain of the target ID. A half-
block means that the circuitry is not 100% certain but is indicating what it might be. A quarter
block means the MXT is more than likely guessing what the target is based on very little
information being available to analyze.
The prospecting mode provides two unique pieces of information in addition to the VDI
number. The first is iron target which shows up as a percentage value. It indicates the
likelihood that the target is iron. Whites recommends that any target reading 50% or less
should be recovered when searching for gold with the MXT. The other piece of information
provided is GND which gives users a way to measure ground mineralization underneath the
coil. This data can be used effectively to locate concentrations of black sand (and hence
pockets of flake and flour gold) that would otherwise have been undetectable. The manual
contains an excellent description of how this information can best be used when using the
MXT for electronic prospecting. [Hyper SAT feature?]
The trigger on the handgrip also serves different functions depending on what search mode is
selected. The center position is the normal search mode while pulling & holding the trigger
switches to the depth-reading, non-motion mode. In the coin and jewelry mode, pushing the
trigger forward activates the Pull Tab Notched Out software which automatically rejects
pulltabs while still accepting nickels. In the relic mode, the forward trigger position activates
the Disc Suppress Rejects software. Targets below the Disc setting will not produce any audio
signal. If the Disc control is set to 0, all targets under the coil will produce an audio signal
with ferrous targets producing a lower pitched tone than non-ferrous targets. This is useful
when trying to locate a camp or skirmish site and the presence of ferrous targets may be the
first indication relic hunters will receive when they are getting close. In the prospecting mode,
the Without Iron Grunt software is activated which eliminates the tell-tale grunt audio signal
produced when a target above 80% iron content is detected; however, audio and meter
indication will still respond to a target. There may be a few applications where one might not
want the Iron Grunt feature active; however, it will allow much of the common iron trash to
be effectively eliminated through the audio response it produces.
The MXT uses the standard Whites drop-in battery pack which uses 8 AA batteries. The new
circuitry produces almost 40 hours of use from alkaline batteries. The optional Whites
rechargeable pack can be used with no impact on performance and is the same one used on
most Whites detectors.
Field Test
The typical Whites Feel-of-Quality was immediately evident upon picking up the assembled
MXT. Over the years I have always been impressed at the solid, well-built construction of
Whites detectors.
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