Icom M700 Mods [verified] Guide
Altering radio equipment can void warranties and may impact the device's compliance with FCC or other national regulatory standards. Always operate within the parameters of your license and local regulations.
Transmission and reception from 1.600 MHz to 29.999 MHz continuously.
For operators who have access to a computer running the , the M700 series can easily be modified for full frequency operation and supports Icom's series of automatic external antenna tuners.
For Amateur Radio operators ("hams"), marine mobile users, and DIY enthusiasts, unlocking the full potential of the M700 requires modifications. This article explores the most common designed to expand frequency coverage, improve functionality, and adapt this marine workhorse for amateur band use. Why Modify the Icom IC-M700?
Most marine HF communication is USB only. For lower ham bands (like 40m or 80m), LSB is the standard. Mods often involve adding a toggle switch or internal circuitry to flip the sideband. Technical and Connectivity Mods icom m700 mods
The Icom M700 is a popular marine VHF radio known for its reliability, durability, and feature-rich design. First introduced in the late 1990s, it has become a staple on many boats and ships worldwide. While the M700 remains a capable and effective communication device, some users may want to explore modifications (mods) to enhance its performance, add new features, or improve its user interface. In this blog post, we'll explore some common Icom M700 mods, their benefits, and what you need to consider before making any changes.
Carefully clip one leg of the designated diode using fine electronics flush cutters. Bend the leg away so it does not touch the board. (Keeping it attached allows you to easily reverse the mod later).
Not every you find online is safe. Here are common mistakes:
: To unlock transmission across all covered frequencies, locate the Logic Board and ensure jumper W37 (W1037) is installed. If it has been cut to restrict the radio to marine bands, simply solder it back together. Memory & Programming Lockout : Altering radio equipment can void warranties and may
Marine microphones are often low-gain to prevent wind noise from overmodulating the transmitter.
Modernizing the interface of the M700 makes it much easier to integrate into a modern radio shack. Adding an External VFO or VFO Tuning
Disclaimer: Modifying radio equipment requires technical knowledge and soldering skills. Unauthorized transmission on certain frequencies may violate local laws and regulations. Frequency Expansion (General Coverage TX)
Modifying electronic equipment requires soldering skills, knowledge of high-voltage circuits (the M700 has lethal voltages inside), and proper test equipment. The author assumes no liability for damage to your radio, your vessel, or your person. Proceed at your own risk. For operators who have access to a computer
Conversely, some regional versions may require cutting this jumper to open the frequency range.
Modifications often involve tapping into the internal PTT (Push-to-Talk), Line In, and Line Out lines to create a DIN plug interface for a PC or Pactor modem.
The most comprehensive archive for specific hardware jumper settings and legacy repair articles.
To give your voice a warmer, more natural broadcast quality, you can modify the microphone pre-amplifier stage on the .
