In some versions, a trimmer potentiometer can be used to increase the power.
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The most fundamental modification is enabling the radio to transmit outside of its factory-set marine bands (MARS/CAP and Amateur Radio expansion). Transmit Enable Jumper
Because the IC-M700 relies on channelized memory selection rather than a tuning knob, operating it like a standard HAM radio can be cumbersome. Operators use two primary workarounds to achieve pseudo-VFO tuning. Direct Keyboard Entry Mod icom m700 mods
Some IC-M700 units have a feature where the front panel 10-key numeric keypad is disabled, requiring a special tool or complex procedure to change channels.
: The IC-M700 is rated for high-power voice transmission. It is not designed for 100% continuous duty-cycle digital modes (like FT8 or RTTY) at full 150W output. When running digital modes, drop the power output down to 30–50W or install auxiliary cooling fans over the rear heatsink to prevent burning out the final power transistors.
Press the or Receive Frequency store keys. In some versions, a trimmer potentiometer can be
: Access the top section of the radio chassis and remove the shielding cover over the digital control circuitry.
Turn the radio OFF. Hold down the MODE and SQL (Squelch) buttons simultaneously, then turn the radio ON. This typically enables the 10-key keypad for direct frequency entry.
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Note: This mod also increases power slightly on some bands – ensure you have a good dummy load and SWR meter.
: The original Icom hand mic is rugged but acoustically restricted. Adapting a dynamic studio desk microphone or an amplified desk mic (like the Icom SM-8 or SM-20) vastly improves audio reports. You will need to build a custom 8-pin to 4-pin or manual terminal block adapter, ensuring that the phantom power line on the IC-M700 mic jack is isolated via a blocking capacitor so it does not damage non-Icom microphone elements. 4. Upgrading Filters for CW and Digital Modes
After removing the diode, perform a factory reset by holding down the clear/reset button combination while powering on the unit to initialize the new frequency boundaries. 🎙️ 2. Audio and Microphone Enhancements
For the , the modification often requires removing a zero-ohm jumper resistor or cutting a specific wire loop labeled "TX Frequency Lock."
