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© 2020
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Johnson Outdoors Marine Electronics, Inc.
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cannondownriggers.com
37
USING THE DOWNRIGGER
CONTROLLING THE MAGNUM
TM
AND MAGNUM
TM
TS
Understanding the features the Magnum and Magnum TS provide to your fishing experience will greatly affect the benefit the downrigger
provides. Become familiar with how to control the downrigger to control the product to enhance your fishing. This section of the manual
will explain the following features:
• Positive Ion Control
• Short Stop
WARNING
Do not touch the Spool while the downrigger is in use.
POSITIVE ION CONTROL
Your boat has a natural electrical charge around the hull when it sits in the water. If a boat is properly grounded and has a
proper zinc anode, that charge should be slightly positive when measured from the motor or lead ground to the downrigger
line. Because of the composite construction of the Magnum and Magnum TS downrigger frame, the downrigger is
insulated from your boat’s hull charge. The downrigger line will only conduct a charge when it is stainless steel and will
not hold a charge when the line is mono-filament or braided. When a stainless steel downrigger line is lowered into the
water, the natural ionization between the line and the boat creates a positive charge of 0.7 to 0.9 volts in saltwater and 0.3 to 0.6 volts
in fresh water. This natural voltage is dependent upon salinity and mineral content of the water and the actual voltage may vary. It will
also only work correctly when the boat is properly grounded.
The practice of setting up and maintaining a slight positive charge
on fishing gear has been used by commercial fishermen for many
years and has enabled some fisherman to increase yield when
used along with other good fishing and boating practices. Positive
Ion Control (PIC) is the use of electricity to control the charge on
the downrigger line and its fluctuation so that it is always maintained at a specified set voltage. Cannon’s electric downriggers offer
fishermen a big advantage in being able to stabilize and control the positive charge around their boat with the PIC system.
The Positive Ion Control system applies a charge between 0.6 and 0.8 volts DC on the downrigger line at all times. The PIC system
applies the voltage to the downrigger line and not the fishing line from the fishing rod. The two lines are tied together while fishing
with a downrigger by a Line Release. Positive Ion Control is very effective when trolling. A zone of attraction will be created by the
downrigger line with PIC applied to attract fish. Placing the lure in the zone of attraction will allow the operator to use PIC to their
advantage when fishing. The distance between the end of the fishing line where the lure is placed and the spot on the fishing line where
the Line Release is secured is called the Drop Back. It is best to use a short Drop Back between the downrigger Line Release and the
lure so that the electrical charge from the PIC circuit is close to the lure. Drop Backs of 10 to 20 ft. are typical. A Drop Back of 50 to
100 ft. will entirely negate the effects of the PIC circuit.
NOTICE:
The Positive Ion Control system will only work
with stainless steel Line and will not work when the Line
is mono-filament or braided.