Instruction manual

This process is fairly simple… but to implement it, your X-TERRA must
be capable of operating in the Multiple Tone mode (X-TERRA 305,
X-TERRA 505, X-TERRA 70, or X-TERRA 705). And you must be using zero
discrimination (or All Metal mode). Although I’ve found that the 9-inch
Concentric coil at 3kHz provides the most easily distinguishable low
tones on deeply buried iron, all of the coils will do it to a certain degree.
When you rst get the “hit” on what sounds like a good target, slowly
“X” over the target from several directions. Much of the deep iron will
produce broken or choppy signals when working your coil around the
target. If the audio response locks on a high tone, make a mental note
as to where the strongest target signal is coming from so you can center
the target under the coil. Once you get the target centered under the
coil, continue wiggling the coil back and forth over the target while
slowly working the coil closer toward you. As the target leaves the front
edge of the eld of detection, listen even more intently to the tones. If
the audio tone is high and drops o suddenly, get out your digging tool
and retrieve your coin.
If the audio tone starts out high, then transforms into a blended
harmonic of low tones when the target leaves the detection eld, I’d bet
the ranch that it is going to be a piece of iron.
By design, the Double-D coil will not lose the target signal until the
target “slips past” the front tip of the coil. Whereas the concentric coils
may lose the audio signal prior to passing under the front edge of the
coil, depending on the depth of the target.
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