Antenna Connection - Alinco DR-MD500 Instruction Manual

Vhf/uhf dual band digital transceiver
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The current capacity of your power supply must be 12A or more.
1.
Connect the DC power cable to the regulated DC power supply and
ensure that the polarities are correct. (Red: positive, Black: negative).
Never directly connect the transceiver to an AC outlet.

Use the supplied DC power cable to connect the transceiver to a

regulated power supply.
Do not substitute a cable with smaller gauge wires.

Regulated
power supply
Red
Black
DC power cable with fuse holder
2.
Connect the transceiver's DC power connector to the connector on
the DC power cable.
Press the connectors firmly together until the locking tab clicks.

Before connecting the DC power to the transceiver, be sure to switch

the transceiver and the DC power supply OFF.
Do not plug the DC power supply into an AC outlet until you make all

connections.
REPLACING FUSES
If the fuse blows, determine the cause, then correct the problem. After
the problem is resolved, replace the fuse. If newly installed fuses
continue to blow, disconnect the power cable and contact your dealer for
assistance.
Fuse Location
Transceiver
Supplied Accessory DC
power cable
Only use fuses of the specified type and rating, otherwise the transceiver
could be damaged.
If you use the transceiver for a long period when the vehicle battery is
not fully charged, or when the engine is OFF, the battery may become
discharged, and will not have sufficient reserves to start the vehicle. Avoid
using the transceiver in these conditions.

Antenna Connection

Before operating, install an efficient, well-tuned antenna. The success
of your installation will depend on the type of antenna and its correct
installation.
Use a 50Ω impedance antenna and low-loss coaxial feed-line that
has a characteristic impedance of 50Ω, to match the transceiver input
impedance. Coupling the antenna to the transceiver via feed-lines having
an impedance other than 50Ω reduces the efficiency of the antenna
system and can cause interference to nearby electronic equipment.
Initial Installation
Fuse Current Rating
15A
15A
2
4

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