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The Gold Bug has three operating modes, each with its own
advantages and disadvantages in any given situation. However
with practice and proper use of the SENSITIVITY and GROUND
ADJUST controls, you can use any mode in just about any situation.
1. MOTION MODE: In this mode the search coil must
be moving, at least slightly, to detect a target. This
is the easiest mode to use under moderate soil
conditions. There is no threshold tone to worry about
so you don't have to use the THRESHOLD control or
listen to a constant hum. It's more sensitive than
the Auto-Tune and doesn't require retuning like the
No-Motion mode. On the other hand, the Motion
mode is more sensitive to electrical interference
and it's harder to identify false signals and bad
targets (hot rocks, ground minerals, trash).
2. AUTO-TUNE MODE: Also a motion mode requiring
at least slight coil movement. Target response is
smoother than in the Motion mode and, with
practice, it's easier to tell the difference between
nuggets and hot rocks and there are fewer false
ground signals. Since most nuggets are found among
hot rocks in extremely mineralized soil this will be the
mode of choice for many nugget hunters.
3. NO-MOTION MODE: This is the most difficult mode
to use. It is more prone to false signals, requires more
retuning and must be re-ground adjusted more often
than the other modes. However, the search coil
does not have to be in motion for target response
so it's the preferred mode in tight spots or situations
where you just can't keep the coil moving back and
forth. Furthermore, the problems of tuning, ground
adjust and false signals lessen considerably at lower
sensitivity levels or in non-mineralized ground. The
No-Motion mode is most often used however for
precise pinpointing once a target has been located
in one of the other modes.
OPERATING MODES