IC-781 - HF Base Transceiver |
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Quick Specs:
HF base transceiver
RX: 0.1-30.0 MHz
TX: all amateur HF bands
Output power: 150 W (75 W AM)
Modes: CW, SSB, AM, FM, RTTY
Receiver sensitivity: see the table in the detailed specifications |
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| Detailed Specifications
General
- Frequency Coverage:
- Receive:
- 0.1 ~ 30.0 MHz
- guaranteed range 500 kHz ~ 30 MHz
- Transmit:
- 160-m band 1.8 ~ 2.0 MHz
- 80-m band 3.5 ~ 4.0 MHz
- 40-m band 7.0 ~ 7.3 MHz
- 30-m band 10.1 ~ 10.15 MHz
- 20-m band 14.0 ~ 14.35 MHz
- 17-m band 18.068 ~ 18.168 MHz
- 15-m band 21.0 ~ 21.45 MHz
- 12-m band 24.89 ~ 24.99 MHz
- 10-m band 28.0 ~ 29.7 MHz
- Modes: A3J (SSB),A1 (CW),F3 (FM), F1 (RTTY), A3 (AM)
- Frequency step: 10 Hz (with [TS] OFF); 1 Hz (with [TS] ON)
- Antenna impedance (with [TUNER] OFF): 50 ohms (unbalanced)
- Power Supply Requirement: 100 ~ 120 V AC (U.S.A. version); 220 ~ 240 V AC (Australia, Europe, France versions)
- Power consumption:
- Receiving maximum. audio: 150 VA; standby: 140 VA
- Transmitting maximum.: 760 VA; minimum: 325 VA
- Usable Temperature Range: -10°C to +60°C; +14°F to +140°F
- Frequency stability: ±15 Hz (-10°C to +60°C; +14°F to +140°F)
- Dimensions: 425(W) x 149(H) x 411(D) mm, 16.7(W) x 5.9(H) x 16.2(D) in
- Weight: 23 kg; 50.7 lb.
Receiver
- Receive system:
- SSB, CW, AM, RTTY: Quadruple-conversion superheterodyne
- FM: Triple-conversion superheterodyne
- Intermediate frequencies:
| Mode |
1st |
2nd |
3rd |
4th |
| SSB |
46.5115 MHz |
9.0115 MHz |
455 kHz |
10.6950 KHz |
| CW, RTTY |
46.5106 MHz |
9.0106 MHz |
455 kHz |
10.6950 KHz |
| AM |
46.5100 MHz |
9.0100 MHz |
455 kHz |
10.6950 MHz |
| FM |
46.5100 MHz |
9.0100 MHz |
455 kHz |
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- Sensitivity (preamp ON):
- SSB, CW, RTTY (for 10 dB S/N):
- 0.1 ~ 0.5 MHz Less than 0.5 µV
- 0.5 ~ 1.8 MHz Less than 1.0 µV
- 1.8 ~ 30 MHz Less than 0.16 µV
- AM (for 10 dB S/N):
- 0.1 ~ 0.5 MHz Less than 3.2 µV
- 0.5 ~ 1.8 MHz Less than 6.3 µV
- 1.8 ~ 30.0 MHz Less than 1.0 µV
- FM (for 12 dB SINAD):
- 28 ~ 30.0 MHz Less than 0.23 µV
- FM squelch sensitivity: 28 ~ 30 MHz Less than 0.23 µV
- Selectivity:
- SSB, CW-W, RTTY-W, AM-N: More than 2.4 kHz/-6 dB ; Less than 3.8 kHz/-60 dB
- CW-N, RTTY-N (with [CW250Hz] OFF): More than 500 kHz/-6 dB; Less than 1 kHz/-60 dB
- CW-N, RTTY-N (with [CW250Hz] ON): More than 250 kHz/-6 dB; Less than 800 kHz/-60 dB
- AM-W: More than 6.0 kHz/-6 dB ; Less than 15.0 kHz/-60 dB
- FM: More than 15.0 kHz/-6 dB ; Less than 30.0 kHz/-50 dB
- Spurious and image rejection ratio:
- Image: Less than -80 dB
- IF: Less than -70 dB
- Audio output: More than 2.6 W with an 8 ohm load at 10% distortion
- Notch filter attenuation: More than 45 dB
- RIT variable range: ±9.99 kHz
Transmitter
- Maximum output power:
- SSB: 150 W PEP
- CW, RTTY, FM: 150 W
- AM: 75 W
- Modulation system:
- SSB: balanced modulation
- FM, RTTY: reactance frequency modulation
- AM: low level modulation
- Maximum frequency deviation: ±5 kHz
- RTTY shift width: 170 Hz, 425 Hz, 850 Hz selectable
- Spurious emissions: Less than -60 dB
- Carrier suppression: Less than -40 dB
- Unwanted sideband: Less than -55 dB (with 1 kHz modulation)
- Microphone impedance: 600 ohms
Antenna Tuner
- Output matching range: 16.7 ~150 ohms unbalanced
- Minimum input power: 15 W
- Auto tuning accuracy: VSWR less than 1.2:1
- Insertion loss: Less than 0.5 dB (after tuning)
CRT Display
- Output level:
- Composite video signal: 1 Vp-p
- Video components: 0.7 Vp-p positive
- Synchronous components: 0.3 Vp-p negative
- Output impedance: 75 ohms
- Horizontal frequency: 15.75 kHz
- Vertical frequency: 60 Hz
IC-781 Options
- IC-4KL 1 kW HF LINEAR AMPLIFIER
- IC-2KL 500 W HF LINEAR AMPLIFIER
- IC-AT500 500 W AUTOMATIC ANTENNA TUNER
- SP-20 EXTERNAL SPEAKER WITH AUDIO FILTERS (8 ohms/5 W)
- SM-6 DESKTOP MICROPHONE
- SM-8 DESKTOP MICROPHONE
- SM-20 DESKTOP MICROPHONE
- HM-12 HAND MICROPHONE (includes UP/DOWN switches)
- UT-36 VOICE SYNTHESIZER UNIT
- CT-16 SATELLITE INTERFACE UNIT
- CT-17 CI-V LEVEL CONVERTER
- EX-627 HF AUTOMATIC ANTENNA SELECTOR
- FL-103 SSB WIDE FILTER (9.0115 MHz, 2.8 kHz/-6 dB)
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