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Last modified 2021-04-03

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Icom IC-731

A picture of Icom IC-731

SPECIFICATIONS

GENERAL
Type:Amateur HF transceiver
Frequency range:TX: 10-160 m + WARC (Japan domestic market)
RX: 0.1-30 MHz
Tuning steps:10 Hz, 1 KHz, 1 MHz
Frequency stability:30 Hz @ 25C (77F), after 1 hr warmup
Mode:AM / FM / SSB / CW / RTTY
Channels/memory management: 12 regular
RAM storage with lithium backup battery
Repeater shift/offset:No dedicated. Use VFO A/B split
Power supply:13.8 VDC 15%
Current drain/power consumption:RX: 1.2 to 1.5 A
TX: Max 20 A
Antenna impedance/connector:50 ohm / SO-239
Dimensions (W*H*D):241*94*272 mm (9.49*3.7*10.71")
Weight:5 Kg (11.02 lb)
Other features:NB. PBT.




RECEIVER SECTION
Receiver system: Triple conversion superheterodyne
1st IF: 70.45 MHz
2nd IF: 9.01 MHz
3rd IF: 455 KHz
Sensitivity: AM (10 dB S/N)
0.1-1.6 MHz: 6 uV
1.6-30 MHz: 1 uV
FM (12 dB SINAD)
1.6-30 MHz: 0.5 uV
SSB/CW (10 dB S/N)
0.1-1.6 MHz: 1 uV
1.6-30 MHz: 0.15 uV
Selectivity: AM: 6 KHz (-6 dB), 18 KHz (-50 dB)
FM: 15 KHz (-6 dB), 30 KHz (-60 dB)
SSB/CW: 2.3 KHz (-6 dB), 4 KHz (-60 dB)
Image rejection:
AF output power/speaker:3 W at 10% distortion / 8 ohm
External speaker connector:3.5 mm, 8 ohm




TRANSMITTER SECTION
RF output power: AM: 10-40 W
FM: 10-100 W (10-50 W @ 10 m)
SSB/CW: 10-100 W (10-50 W @ 10 m)
Modulation system:
FM deviation:5 KHz
Spurious emissions:Less than -50 dB
Microphone impedance/connector:600 ohm / 8-pin (Metal locking ring connector)
Microphone input level:? mV




MISCELLANEOUS
Manufactured:Japan, 1985-198x (Discontinued)
Additional info:New price 1985 in Australia: $1099.00 AUD
Related documents:
Modifications and fixes:
Reviews:
Options/Accessories:
AT-100
AT-150
AT-500
EX-243
FL-30
FL-32
FL-63
HM-12
HP-1
IC-2KL
MB-5
OPC-118
PS-30
PS-55
SM-6
SM-8
SP-3
SP-7
Automatic antenna tuner
Automatic antenna tuner
Automatic antenna tuner
Electronic keyer unit
SSB narrow filter. 2.3 KHz
CW narrow filter. 500 Hz
CW narrow filter. 250 Hz
Standard hand microphone
Headphones
HF linear amplifier. 500 W
Mobile mounting bracket
ACC adapter cable for IC-2KL. 24-pin to 8-pin
AC power supply. 13.8 VDC, 25 A
AC power supply. 13.8 VDC, 20 A
Desk microphone
Desk microphone with dual line output
External speaker
External speaker