Panel Description; Front And Rear Panels - Icom IC-440 Instruction Manual

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PANEL DESCRIPTION

■ IC-440 front and rear panels
w e
q MICROPHONE CONNECTOR
Connects the supplied microphone or cloning cable
(OPC-1122U).
q DC output (same voltage as connected
w TX line
i q
e GND
r PTT
t GND (microphone ground)
Front panel view
y AF line
u POWER
i RX line
6
Front panel
q
Rear panel
r
battery or DC power supply)
w POWER RECEPTACLE
Accepts 13.8 V or 27.6 V DC with the supplied DC power
cable.
NOTE: DO NOT use a cigarette lighter socket as a power
source when operating in a vehicle. The plug may cause
voltage drops and ignition noise may be superimposed
onto transmit or receive audio.
e EXTERNAL SPEAKER JACK [SP]
Connects a 4 Ω speaker. (p. 4)
• Audio output power is more than 5.0 W.
r ANTENNA CONNECTOR
Connects a 50 Ω antenna with a PL-259 connector and a
50 Ω coaxial cable.
ANTENNA INFORMATION
For radio communications, the antenna is of critical im-
portance, to maximize your output power and receiver
sensitivity. The transceiver accepts a 50 Ω antenna and
less than 1:1.5 of Voltage Standing Wave Ratio (VSWR).
High SWR values not only may damage the transceiver
but also lead to TVI or BCI problems.