Mobile Power Connections - Yaesu FT-712RH Operating Manual

Mobile Power Connections

Before connecting the power cable the maximum battery charging voltage should be
checked to ensure that it remains below 15V when the engine is run fast. If more
than 15V, the voltage regulator of the car should be adjusted before connecting the
transceiver.
Power connections should be made directly to the automobile battery using the
supplied cable with 15A in-line fuses. Connection to the cigarette lighter or other
accessory circuit may cause the fuse to blow in that circuit. Connecting the supplied
DC power cable to the battery independently of the rest of the automobile electrical
system will minimize possible ignition noise pickup and excessive supply voltage
drop during transmission, while allowing operation with the ignition off.
Do not connect any power to the transceiver except via the supplied fused cable, and
do not attempt to defeat or bypass the fuses - they are their to protect you and the
equipment.
Connect the RED lead of the power cable to the POSITIVE (+) battery
terminal, and the BLACK lead to the NEGATIVE (-) terminal. If it is necessary to
extend the power cable, use #14 AWG or larger insulated, stranded copper wire, and
in all cases use the minimum power cable length practicable to keep voltage drop
minimal.
NEVER APPLY AC POWER TO THE REAR PANEL POWER JACK
OF THE TRANSCEIVER. NEVER CONNECT DC VOLTAGE OF
MORE THAN 15 VOLTS TO THE POWER JACK. ALWAYS RE-
PLACE FUSES WITH 15A RATING. FAILURE TO OBSERVE THESE
PRECAUTIONS WILL VOID THE WARRANTY.
WARNING
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