Listen LR-600, User Manual

Page: 10 / 32

Antenna Options
8
LR-600 Antenna Options
The LR-600 has two antenna options: internal or external. To use the internal antenna, move the
antenna switch to INT. To use the external antenna, move the switch to EXT.
Internal antenna
As shipped, your LR-600 is set up for use with its internal antenna. The
internal antenna will work well for a large number of uses, but it cannot be
positioned for best coverage. When using the LR-600’s internal antenna,
make sure the antenna switch is in the INT position. If your receive signal
is noisy or weak, you may need to use an external antenna.
External antenna
There are three options for the external antenna:
Quarter wave helical antenna
This antenna mounts directly to the back of the LR-600. Order
these part numbers from Listen:
· LA-123 (72 mHz)
· LA-124 (216 mHz)
Remote antenna
See page 17, RF Reception Maximization Strategies. With a remote
antenna, you’ll be able to get the best reception by strategically placing
the antenna.
Antenna options available from Listen:
· LA-122 Universal Antenna Kit (72 and 216 mHz)
· LA-123/LA-124 (72/216 mHz) to be mounted remotely
· LA-107 Ground plane antenna (216 mHz).
Wire antenna
You can build a wire antenna by soldering a wire to the center conductor on
a BNC connector. Recommended lengths for wire antennas:
· 72 mHz: 39 in (1 m)
· 216MHz: 13 in (0.32 m)