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Icom America - 2 way radios

IC-7851

HF/50MHz Transceiver

Specifications

Specifications

General

Frequency coverage*1
U.S.A. Version
RX
TX
 
 
 
 
0.030– 60.000 MHz*2
1.800– 1.999 MHz
3.500 – 3.999 MHz
5.255 – 5.405 MHz*2
7.000 – 7.300 MHz
10.100–10.150 MHz
14.000– 14.350 MHz
18.068–18.168 MHz
21.000– 21.450 MHz
24.890–24.990 MHz
28.000– 29.700 MHz
50.000–54.000 MHz
 
*1 Frequency ranges vary depending on version.
*2 Some frequency ranges are not guaranteed.
Mode USB, LSB, CW, RTTY, PSK31/63, AM, FM
Number of channels 101 (99 regular, 2 scan edges)
Antenna connector SO-239×4 and BNC×2 (50Ω unbalanced (Tuner off))
Power supply requirement: 85–265V AC
Temperature range 0°C to +50°C; +32°F to +122°F
Frequency stability

Less than ±0.05ppm

(0°C to +50°C @ 54MHz, after warm up)

Frequency resolution 1Hz (minimum)
Power supply requirement 85–265V AC
Power supply requirement Tx Max. power: 800VA
Rx Stand-by: 200VA (typ.)
Max. audio: 210VA (typ.)
Dimensions 425×149×435 mm; 16.73×5.87×17.13 in
Weight 23.5 kg; 51.8 lb

Transmitter

Output power
SSB, CW, RTTY, PSK31, FM
AM
Transverter Connector, CW
(continuously adjustable)
5–200W
5–50W
More than –20dBm
Modulation system
SSB
AM
FM
 
Digital P.S.N. modulation
Digital low power modulation
Digital phase modulation
Spurious emission More than 60dB (HF bands)
More than 70dB (50 MHz band)
Carrier suppression More than 63dB
Unwanted sidebandr suppression More than 70dB
δTX variable range ±9.999 kHz
Microphone impedance 600Ω (8-pin connector)

Receiver

Receive system Double conversion super-heterodyne system
Intermediate frequencies
Main receiver:
 
Sub receiver:
 
64.455MHz/36kHz (1st/2nd)

64.555MHz/36kHz (1st/2nd)
Sensitivity (typical)
SSB, CW, RTTY, PSK31, FM
0.1–1.799 MHz
1.8–29.999 MHz
50.0–54.0 MHz
AM
0.1–1.799 MHz
1.8–29.999 MHz
50.0–54.0 MHz
FM
28–29.999 MHz
50.0–54.0 MHz
 
(BW: 2.4 kHz at 10dB S/N)
0.5μV
0.16μV
0.13μV
(BW: 6 kHz at 10dB S/N)
6.3μV
2μV
1μV
(BW: 15 kHz at 12dB SINAD)
0.5μV
0.32μV
Squelch sensitivity (Pre-amp: OFF)
SSB, CW, RTTY, PSK
FM
 
Less than 5.6μV
Less than 1μV
Selectivity (representative value)
SSB (BW: 2.4 kHz, sharp)
 
CW, RTTY, PSK (BW: 500 Hz, sharp)
 
AM (BW=6KHz)
 
FM (BW: 15 kHz)
 
 
More than 2.4 kHz/–3dB
Less than 3.6 kHz/–60dB
More than 500 Hz/–3dB
Less than 700 Hz/–60dB
More than 6.0 kHz/–3dB
Less than 15.0 kHz/–60dB
More than 12.0 kHz/–6dB
Less than 20.0 kHz/–60dB
Spurious and image rejection ratio More than 70dB
Audio output power More than 2.6W at 10% distortion with an 8Ω load
RIT variable range ±9.999kHz

Antenna Tuner

Matching impedance range HF bands: 16.7Ω to 150Ω unbalanced (VSWR better than 3:1)
50MHz: 20Ω to 125Ω unbalanced (VSWR better than 2.5:1)
Minimum operating power HF bands: 8W
50MHz band: 15W
Tuning accuracy VSWR 1.5:1 or less
Insertion loss Less than 1.0 dB (after tuning)

All stated specifications are subject to change without notice or obligation.

The LCD display may have cosmetic imperfections that appear as small or dark spots. This is not a malfunction or defect, but a normal characteristic of LCD displays.

Supplied Accessories

  • Rack mount handles
  • SD card
  • AC power cable
  • Spare fuses
  • Plugs

 

 

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