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Icom America - 2 way radios


HF/50MHz Transceiver

HF/50MHz Transceiver - The Pinnacle of HF Perfection

Operational Functionality for the Most Advanced Operators


Digital Voice Recorder

The digital voice recorder captures both receive and transmit audio to your SD or USB storage devices. Up to 9 hours of continuous audio recording is possible with 2 GB of storage. Record your QSO with a rare entity or record your operating time in a contest. Operating frequency, mode, S-meter and output power are automatically captured.

Recorded list display

Memory Keyer

Whether operating phone, CW, RTTY or PSK31/63, the IC-7851 has a convenient memory keyer to ease operations. Record your CQ, station information or other items in one of 8 keyer memories for the CW and digital modes; 4 memories for phone operation. For CW, the memory keyer has timesaving functions like auto repeat, contest serial number counter and short Morse number functions. For phone operation, you have a voice-saving auto repeat function.

Improved Automatic Antenna Tuner

The automatic antenna tuner utilizes tune setting memories to record the best tuner configuration for the lowest SWR. This allows a faster response time when jumping bands or moving around in the same band.

Internal Memory Switch

With six antenna ports – two receive-only and four receive/transmit – the IC-7851 enables the operator to have fingertip control over a vast array of antenna configurations. Switch to 80/160m and you want to use your beverage antenna for receive, but transmit on your vertical. Not a problem: the antenna switch memory will automatically switch antennas when you select the band you want to operate. This is very convenient when using the RS-BA1 for remote base operation.

Enhanced PC Connectivity

The IC-7851 has various computer interfaces, giving you maximum connectivity between your computer and radio. Digital modes become a snap when controlling with the USB port. USB audio and some CI-V commands including USB send (DTR/RTS) and USB keying (CW and RTTY) are selectable. You can also interface your computer with the S/P DIF optical digital interface provides audio I/O. The Ethernet jack allows you to connect the IC-7851 directly to your router and control your radio over your wireless Internet, or travel the globe and operate your station remotely over the Internet.

Firmware Update Capability

The IC-7851 can grow as feature and function enhancements become available via the USB or your SD Card.

Simplified Remote Control

Remote base operation is made easy as the IC-7851 operating system incorporates the remote base server software. A computer is not required in the shack for audio or rig control. Up to three, unique user log-in/password configurations are part of the internal server. As the rig control has a priority of service, the controls will feel like you are right in front of your rig.

Optional RS-BA1 main features

  • Most functions of your transceiver, including interference rejection functions and IF filter settings, can be controlled. Also, received signal strength and SWR can be observed on the computer display.
  • Received voice recording function.
  • Optional RC-28 USB remote encoder provides a hardware dial/transmit functions for a realistic dial operation.
  • The IC-7851 can wake-up from the standby mode through the RS-BA1 software.

Other Outstanding Features


  • BNC type RX input/output connectors for receiver antennas or external attenuators


  • General coverage receiver covers from 30Hz to 60MHz* (* Some frequency ranges are not guaranteed.)
  • Two types of preamplifiers:
    Preamp 1: improves intermodulation characteristics
    Preamp 2: High gain preamp for high bands
  • A seven step attenuator (3, 6, 9, 12, 18, 21dB and OFF)
  • A dedicated 50MHz band mixer using a Quad FET
  • Twin peak filters for better RTTY signal reception


  • Speech compressor increases average talk power (SSB mode)
  • TX monitor functions
  • Fifty sub-audible tones (CTCSS) for repeater access
  • VOX (Voice operated transmission) capability
  • All mode power control


  • DSP controlled CW keying waveform shaping
  • Multi-function electronic keyer with adjustable keying speed, dot/dash ratio, keyer type, rise time and paddle polarity
  • Electronic keyer speed popup
  • CW pitch control from 300 to 900Hz (5Hz pitch)
  • CW reverse mode operation for receiving USB side signal
  • Double key jacks for front and rear panels
  • Full break-in and semi break-in functions
  • CW/AM auto tuning function helps to zero in on intended signals within ±500Hz range
  • Soft and sharp audio filter shapes for the Audio Peak Filter (APF)


  • Set mode functions for flexible and speedy settings
  • Memo pads stores up to 10 operating frequencies and modes
  • Quick split function and split lock functions
  • Quick Dualwatch function
  • SSB/CW synchronous tuning
  • RIT and ⊿TX variable up to 9.999kHz
  • UTC/Local clock and timer function
  • 1Hz pitch tuning and display
  • 101 memory channels with 10-character channel name
  • Built-in voice synthesizer announces the operating frequency, mode, and S-meter level
  • Programmed scan, memory scan, select memory scan, VSC scan and ⊿f scan
  • Auto tuning step function
  • Dial lock function
  • Main dial tension control
  • Programmable band edge beeps
  • S/P DIF input/output connectors
  • BNC type transverter connector
  • External speaker connectors for Main/Sub receivers
  • FFT scope waveform averaging function for PSK and RTTY decoder
  • Screen saver function



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