Mods | Icom M700

Carefully clip one leg of the designated diode using fine electronics flush cutters. Bend the leg away so it does not touch the board. (Keeping it attached allows you to easily reverse the mod later).

| Question | Answer | | :--- | :--- | | Can I use the IC-M700 on the 10m ham band? | Some versions, like the base M700, only tune up to about 22–23 MHz and are not capable of reaching the 28 MHz 10m band due to PLL limitations. | | Do I need to modify the IC-M700PRO for ham bands? | Likely not. Many IC-M700PRO units, particularly version 02, will transmit and receive on ham bands without any modifications. | | Can I add a continuous VFO tuning knob to the M700? | No. The M700 series is primarily a channelized marine radio, designed for fixed-frequency channels rather than continuous VFO-style operation. | | What is the maximum safe power output for data modes? | For continuous high-duty-cycle modes like FT8, it's wise to keep the output power moderate. The M700 is only capable of about 50 watts continuous output, so reducing power from the maximum is highly recommended. | | Which sideband (LSB or USB) should I use? | It depends on the amateur band. On 160m, 80m, and 40m, LSB is the standard convention. On 20m, 17m, 15m, 12m, and 10m, USB is standard. |

If the front-panel 10-key buttons are unresponsive, toggle the small switch S1228 located on the Matrix board. Advanced Amateur Radio Mods

This helps the radio recover faster after receiving strong signals. Microphone Audio EQ icom m700 mods

: To allow programming of memory banks A and B, ensure that jumper W33 (W1033) is not installed. If the 10-keypad is unresponsive, toggle switch S1228 on the Matrix board.

If the frequency expansion mod doesn't automatically enable LSB or CW, you may need to perform a using the radio's front panel.

To use the M700 for FT8, JT65, or SSTV, you need to interface the radio with a computer via a sound card interface. Carefully clip one leg of the designated diode

Locate the specific jumper or diode responsible for regional frequency restrictions (often labeled as D18 or a specific jumper pad near the microprocessor).

The IC-M700 can memorize 48 channels, storing both transmit and receive frequencies independently. Memories are fully programmable from the front panel keyboard and are field-programmable, requiring no specialized equipment for channel management. The memory is retained by a lithium battery, which may need periodic replacement as the radio ages.

Out of the box, the IC-M700 restricts transmission to specific marine bands. Opening up the transceiver for continuous transmit across its entire frequency range (typically 1.6 MHz to 24 MHz or 30 MHz depending on the exact sub-model) is the most sought-after modification. This enables use on MARS (Military Auxiliary Radio System), CAP (Civil Air Patrol), and all HF amateur radio bands. Step-by-Step Matrix Diode Modification | Question | Answer | | :--- |

For the , after performing the hardware mod, you can follow these steps:

: A central archive for power modifications, lockout disables, and various service bulletins.

The Icom IC-M700 is widely regarded as a workhorse of the marine HF/SSB world. Known for its rugged construction and reliable performance in demanding ocean environments, this transceiver has outlasted many newer, more complex units. However, because it was designed strictly as a marine radio, its factory settings limit it to designated marine bands and frequencies.