Icom M700 Mods |top| Link

Newer modifications include adapting the 8-pin connector to accept high-quality dynamic microphones or XLR inputs, which can significantly improve audio punch in difficult conditions. 4. Mode and Power Adjustments

Marine microphones are often low-gain to prevent wind noise from overmodulating the transmitter.

Quick checklist for a safe mod/install

Using modified marine radios on amateur bands raises important legal considerations. In the United States, a modified ham radio is generally illegal to use on marine bands except in emergencies, and marine radios used on amateur bands must be operated by licensed amateur operators with their station license prominently displayed. Conversely, a marine SSB radio can legally be used on amateur bands as long as it is not operated on marine frequencies. The rules require that amateur and marine operations remain separate, though they can share a common antenna.

The M700 has a spot on the main board for an optional mechanical or crystal filter (often a Murata CFJ455K or equivalent). Many surplus units have an empty slot. icom m700 mods

Modifying radio equipment requires solid soldering skills and test equipment. Working inside electronic hardware can damage sensitive components through electrostatic discharge (ESD). Additionally, transmitting on unauthorized frequencies or exceeding legal power limits may violate national telecommunications regulations (such as FCC rules). Proceed at your own risk. 1. General Coverage Transmit Mod (Frequency Expansion)

To repurpose the IC-M700 for amateur (ham) radio bands, enthusiasts typically focus on frequency expansion and usability. Frequency Expansion (MARS/CAP): Newer modifications include adapting the 8-pin connector to

Solder the jumper (or a wire bridge) back together to unlock general frequency transmission.

. If this jumper is cut, soldering it back together typically opens the transmitter for full frequency coverage. Memory Expansion: The stock M700 is limited to 48 channels. Specialized SRAM expansion mods Quick checklist for a safe mod/install Using modified