Icom IC-781 Amateur HF Transceiver

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The Icom 781 has a built-in multifunction five inch CRT display, spectrum scope, dual watch receive, standard wide and narrow filters for both SSB and CW, iambic keyer, 99 tunable memories, 105 dB dynamic range, 150 watts of RF output power, fully adjustable noise blanker and AGC circuits, all mode operation plus many more features combine to make the Icom IC-781 an amateur's dream rig. The IC-781 operates from 110 VAC. 

Icom IC-781<

Type:Amateur HF transceiver
Frequency range:TX: 10-160 m + WARC
RX: 0.1-30 MHz
Tuning steps:10 Hz / 1 KHz
Mode:AM/FM/SSB/CW/RTTY
Channels/memory management:99 regular with notes
2 scan edge
Lithium battery backup (and one separate lithium battery for the clocks)
Repeater shift/offset:±? KHz
Power supply:Mains: 100-120 VAC (USA) or 220-240 VAC (Europe, Australia)
Current drain/power consumption:RX: 140-150 VA
TX: 325-760 VA
Antenna impedance/connector:50 ohms (ATU off) / SO-239
Dimensions (W*H*D):425*149*411 mm (16.8*5.9*16.2")
Weight:23 Kg (50.7 lbs)
Other features:Monochrome CRT, Spectrum scope. Clock/timer, Notch, CTCSS/PL on
transmit. Twin PBT, NB, Dual watch on the same band, VOX, Built-in
keyer and auto-AT (16.7-150 ohms)




RECEIVER SECTION
Receiver system:Triple conversion superheterodyne (FM)
1st IF: 46.51 MHz
2nd IF: 9.01 MHz
3rd IF: 455 KHz
Quadruple conversion superheterodyne (AM/SSB/CW/RTTY)
1st IF: 46.51 MHz
2nd IF: 9.01 MHz
3rd IF: 455 KHz
4th IF: 10.695 MHz
Sensitivity:AM (10 dB S/N)
0.1-0.5 MHz: 3.2 uV
0.5-1.8 MHz: 6.3 uV
1.8-30 MHz: 1 uV
FM (12 dB SINAD)
28-30 MHz: 0.23 uV
SSB/CW/RTTY (10 dB S/N)
0.1-0.5 MHz: 0.5 uV
0.5-1.8 MHz: 1 uV
1.8-30 MHz: 0.16 uV
Selectivity:AM-W
>6 KHz (-6 dB), <15 KHz (-60 dB)
FM
>15 KHz (-6 dB), <30 KHz (-60 dB)
SSB/CW-W/RTTY-W/AM-N
>2.4 KHz (-6 dB), <3.8 KHz (-60 dB)
CW-N/RTTY-N (CM250Hz Off)
>500 Hz (-6 dB), <1 KHz (-60 dB)
CW-N/RTTY-N (CM250Hz On)
>250 Hz (-6 dB), <800 Hz (-60 dB)
Image rejection:-80 dB
AF output power/speaker:2.6 W at 10% distortion / 8 ohms
External speaker connector:




TRANSMITTER SECTION
RF output power:AM: 8-75 W
SSB: 15-150 W PEP
CW/RTTY/FM: 15-150 W
Modulation system:AM: Low level modulation
FM/RTTY: Reactance modulation
SSB: Balanced modulation
Max FM deviation:±5 KHz
Spurious emissions:Less than -60 dB
Microphone connector/impedance:8-pin / 600 ohms




MISCELLANEOUS
Manufactured:Japan, 1987-1993 (Discontinued)
Additional info:New price 1988 in Sweden: 46500:- SEK
Related documents:User manual (6.7 MB)
Modifications:
Options/Accessories:
CT-16
CT-17
HM-36
HP-2
IC-AT500
IC-2KL
SM-6
SM-8
SM-10
UT-36
WR-200
WR-2000
Satellite interface unit
CI-V level converter
Hand microphone with up/down switch
Communication headphones
Automatic antenna tuner, 500 W
Linear amplifier, 500 W
Desk microphone, electret condenser type
Desk microphone with dual line outputs
Desk microphone with compressor & graphic EQ
Voice synthesizer unit
SWR/Power meter, 1.8-150 MHz, 200 W
SWR/Power meter, 1.8-54 MHz, 2000 W

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