Kenwood TM-451A - Manual (Page 13)

If the fuse blows, determine the cause then correct
the problem. After the problem is resolved, then
replace the fuse. If newly installed fuses continue to
blow, disconnect the power cable and contact your
dealer or nearest Service Center for assistance.
Replacing Fuses
Fuse Location Fuse Current Rating
TM-251A/E 15 A
TM-451A/E 10 A
Supplied Accessory
DC Power Cable
20 A
CAUTION: Only use fuses of the specified type and rating.
Note: If you use the transceiver for a long period when the
vehicle battery has not been fully charged, or when the engine
has been stopped, the battery may become discharged, and will
not have sufficient reserves to start the vehicle. Avoid using the
transceiver under these conditions.
Before operating mobile, you must first install an
efficient, well-tuned antenna. The success of your
mobile installation will depend largely on the type of
antenna and its correct installation. The transceiver can
give excellent results if the antenna system and its
installation is given careful attention.
Your choice of antenna should have a 50 ohm
impedance to match the transceiver input impedance.
Use low-loss coaxial feed line that also has a
characteristic impedance of 50 ohms. Coupling the
antenna to the transceiver via feed lines having an
impedance other than 50 ohms reduces the efficiency of
the antenna system, and can cause interference to
nearby broadcast television receivers, radio receivers,
and other electronic equipment.
ANTENNA CONNECTION
ANT connector Feed line connector
CAUTION: Transmitting without first connecting an antenna or other
matched load may damage the transceiver. Always connect the
antenna to the transceiver before transmitting.