After clipping the correct diode, ensure the clipped leads cannot touch any other components, reassemble the case, and perform a master CPU reset if required. The radio will now transmit anywhere it can receive. 2. Clarifier / RIT Modification
Always verify your specific board revision layout against the official service manual before cutting.
The Icom M700 is not a SDR (Software Defined Radio). It won't give you a waterfall display or a narrow roofing filter. But for the price (often $150–250 at swap meets), you get a 150W transceiver with a receiver front end that rivals radios costing ten times as much. icom m700 mods
: The standard IC-M700 has 48 memory channels. Advanced users can expand this to 480 channels using a custom SRAM expansion board that replaces the original memory.
Look for a row of small switching diodes (often labeled D1, D2, D3, etc.) arranged in a matrix pattern near the main microprocessor. The Modification: After clipping the correct diode, ensure the clipped
: Locate the audio bandpass filtering capacitors in the mic amp circuit. Replacing small ceramic capacitors (e.g., 0.01µF) with slightly larger tantalum or film capacitors (e.g., 0.1µF) lowers the low-frequency cutoff point. This introduces more bass and warmth to your transmitted signal.
For the M700PRO, output power can be adjusted either by entering the hidden service mode via the front panel or by connecting a small external circuit to the ACC socket on the rear panel. Clarifier / RIT Modification Always verify your specific
On standard M700 models, removing specific diodes lifts the factory frequency restrictions. For many versions, snipping or unsoldering Diode D15 (or a specific combination detailed in the service manual for your exact sub-model) resets the radio to general coverage transmit.
If you enjoy the smell of rosin flux and the satisfaction of pulling a weak signal out of the noise using a rig you hot-rodded yourself, buy an M700. Open it up. Perform these mods. And join the nets with a piece of radio history that now performs like a modern classic.