ICOM 297900 User Manual

17

3

CONNECTION AND MAINTENANCE

■ Antenna

A key element in the performance of any communication sys-
tem is an antenna. Contact your dealer about antennas and
the best places to mount them.

■ Fuse replacement

A fuse is installed in the supplied DC power cable. If a fuse
blows or the transceiver stops functioning, track down the
source of the problem if possible, and replace the damaged
fuse with a new rated one.

❑Fuse rating: 20 A

USE the 20 A fuse only.

■ Cleaning

If the transceiver becomes dusty or dirty, wipe it clean with a
soft, dry cloth.

AVOID the use of solvents such as benzene or

alcohol, as they may damage the transceiver sur-
faces.

■ Options

• RMK-3 

SEPARATION KIT

+ 

SEPARATION CABLE

Allows you to install the transceiver main unit separately
from the front panel for operating convenience.

• SP-5/SP-10/SP-22 

EXTERNAL SPEAKER

Input impedance : 4 

Ω

Max. input power : 5 W
SP-5

: Large speaker for good audio quality.

SP-10 : For all-round mobile operation.
SP-22 : Compact and easy-to-install. The same as supplied

with the transceiver (depending on version.)

• HM-152/HM-152T/HM-148 

HAND MICROPHONE

HM-152 : Hand microphone
HM-152T : DTMF microphone
HM-148 : Heavy duty microphone

• SM-25 

DESKTOP MICROPHONE

SCRAMBLER UNITS

Non-rolling type (UT-109R)/Rolling type (UT-110R) voice
scrambler unit provides higher communication security.

• UT-96R 

5

TONE UNIT

DIGITAL MODULATOR

/

DEMODULATOR UNIT

Provides 6.25/12.5 kHz narrow bandwidth digital mode
operation.