Icom M700 Mods [2021] (LATEST ✯)

, has become a popular project for amateur radio enthusiasts due to its robust build and low cost on the second-hand market. While powerful, its original firmware and hardware are strictly tailored for marine use, necessitating several modifications to make it a versatile amateur station. Frequency Expansion and Control

Note: This guide focuses on legitimate, safety-first, and legal modifications for the Icom IC-M700 (marine VHF fixed station) to improve usability, reliability, and integration. Do not perform modifications that violate local radio laws, FCC/ITU regulations, or that alter the unit’s certified transmission characteristics (e.g., increasing transmit power beyond spec, changing frequencies, or bypassing required emission limits). Always consult a certified radio technician or Icom for repairs that impact RF circuits or safety. Use this guide only for permitted hardware, ergonomic, and software/firmware tweaks that do not change certified RF parameters. icom m700 mods

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. , has become a popular project for amateur

| Mod | Difficulty | Tools Needed | Benefit | |------|------------|--------------|---------| | MARS/CAP (full TX) | Medium | Soldering iron, diode cutter | Ham band transmit | | TX audio mod | Easy | Soldering iron, capacitor | Clearer voice | | CW filter add-on | Hard | Oscilloscope, filter, PCB | Weak signal CW | | Fan control | Easy | Resistor/thermal switch | Quiet operation | | PLL recap | Medium | Desoldering pump, caps | Reliable lock | Do not perform modifications that violate local radio