Icom IC-471H Instruction Manual page 4

SECTION 2 FEATURES
430MHz ALL-MODE 75 WATTS TRANSCEIVER INCORPORATING A MICROCOMPUTER
CPU control with ICOM's original programs provides various operating capabilities. A no-backlash dial controls by ICOM's
unique rotary encoder circuit. The Band-edge detector and the Endless System provides out-of-band protection. Variable
capacitors and dial gear are not utilized and therefore provide problem-free use. The IC-471H provides FM, USB, LSB, CW
coverage in the 430 ~ 450MHz (European version: 430 ~ 440MHz) frequency range with 75 watts output power. Thus the
1С-471Н can be used for mobile, DX, local calls, and satellite work.
MULTI-PURPOSE SCANNING
Memory Scan allows you to monitor all different memory channels or only those stored with a particular mode. Program
Scan provides scanning between two programmed frequencies. Auto-stop scanning when a signal is received, in any mode.
DUAL VFO'S AND 32 MEMORY CHANNELS
Two separate VFO's can be used either independently or together for simplex operation, and any desired frequency split in
duplex operation.
The 1С-471Н has 32 memory channels and each channel stores the operating frequency as well as the mode, duplex/simplex
and subaudible tone frequency (U.S.A. version only).
CONTINUOUS TUNING SYSTEM
ICOM's new continuous tuning system features a luminescent display that follows the tuning knob movement and provides
an extremely accurate readout. Frequencies are displayed in 7 digits representing 100MHz to 100Hz digits.
Automatic recycling restarts tuning at the top of the band, i.e., the high edge when the dial goes below the low edge. Recycl-
ing changes the high edge to the low edge as well. Quick tuning in 1KHz steps is available, and fine tuning in 10Hz steps in
the SSB and CW modes, and 5KHz steps and 1KHz steps in the FM mode, is provided for trouble-free QSO.
EASY-TO-READ DISPLAY
The IC-471H employs an easy-to-read large luminescent display. This displays the operating frequency as well as the VFO
in use, operating mode, RIT shift frequency, duplex mode, scan mode, etc.
EASIER OPERATION, LIGHTER WEIGHT AND HIGHER POWER
The 1С-471Н is the most compact 75 watt, lightest weight all-mode 430MHz transceiver. It is the first to use a pulse power
supply (option) in communication equipment, for light weight. A 50mm-diameter large tuning control knob is provided for
smooth and easy tuning. Easy to use control knobs are provided for both receiving and transmitting. An LED indicates the
transmit or receive mode.
MOST SUITABLE FOR BOTH FIXED AND PORTABLE STATIONS
The transceiver can be operated with a self-contained 117/240V AC (option) or 12V DC power supplies. A convenient Dial
Lock switch is included for mobile operation as well as an easy-carry handle. An effective Noise Blanker reduces pulse noise.
The 1C-SMG, high quality stand microphone (option), is suitable for fixed station operation. A powerful audio output, 2.0
watts at 8 ohm, provides easy listening even in noisy surroundings.
OUTSTANDING PERFORMANCE
The RF amplifier and the first mixer circuit incorporate FET's, and other circuits provide excellent Cross Modulation and
Two-Signal Selectivity characteristics. The IC-471H has excellent sensitivity, demanded especially for mobile operation,
high stability, and utilizes Crystal Filters having high shape factors and exceptional selectivity.
The transmitter uses a balanced mixer in a double conversion system, a band-pass filter and a high-performance low-pass filter.
This system provides distortion-free signals with a minimum spurious radiation level.