Icom M700 Mods Jun 2026

The DSC upgrade requires a hardware modification and may require professional assistance. Consult an authorized Icom dealer or a qualified technician for this mod.

The M700 relies on convection cooling. For contesting or FT8 (high duty cycle), it gets scorching hot. icom m700 mods

(and its successor, the M700PRO ) is a legendary marine HF transceiver prized by mariners and amateur radio operators alike for its rugged construction and 150W output. While originally designed for marine SSB channels, a few key modifications can transform this workhorse into a versatile HF rig for the ham bands or specialized data use. 1. Transmit Frequency Expansion (MARS/CAP Mod) The most common modification for the The DSC upgrade requires a hardware modification and

A common complaint among audiophiles and DXers (long-distance listeners) regarding the M-700 is the audio filtering. For contesting or FT8 (high duty cycle), it

These "jumpers" on the internal logic board control the radio's primary operating restrictions.

Improving the M700's transmit audio and connectivity is key for modern ham use.

The stock fan only runs when the PA gets very hot. For long rag-chews, this is insufficient. Fix: Locate the thermistor (temperature sensor) on the PA heat sink. Desolder one leg and insert a 100-ohm resistor in parallel. This will make the fan turn on at a lower temperature and run continuously at low speed (or install a manual toggle switch on the rear panel to run the fan at half speed during transmit).