Some regional versions of the M700 have locked memory banks (A and B) to prevent users from accidentally overwriting critical marine frequencies.
Modifications often involve tapping into the internal PTT (Push-to-Talk), Line In, and Line Out lines to create a DIN plug interface for a PC or Pactor modem.
(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 icom m700 mods
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
While this mod covers most HF bands, reaching the 10-meter band (28 MHz) typically requires more complex hardware modifications beyond a simple jumper. 2. Memory and Programming Unlocks Some regional versions of the M700 have locked
If the jumper is cut or missing, the radio may be locked to marine channels.
Page 3. SECTION 1 SPECIFICATIONS. GENERAL. Frequency Coverage: Receive. Transmit. 1.6MHz ~23.9999MHz. 2.0MHz - 2.9999MHz. 4.0MHz ~ IC-M700 - Single Sideband Radiotelephone - ICOM Canada While originally designed for marine SSB channels, a
is "opening up" the transmitter. In its stock configuration, the radio often limits transmission to marine bands.
If your 10-key keypad isn't responding, look for switch S1228 on the Matrix board. Toggling this switch can often restore keypad functionality for field programming. 3. Digital Modes and Pactor Integration
To allow full front-panel programming of banks A and B, ensure that jumper W33 (W1033) on the Logic Board is NOT installed.