Icom M700 Mods

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

Note: The up/down buttons on the HM-114 will not function after this mod. IC-M700 Mods - Elliott Liggett - GitLab icom m700 mods

To enable transmission across all frequencies covered by the radio, verify the state of jumper W37 (W1037) on the Logic Board. These "jumpers" on the internal logic board control

: To enable transmit across the entire covered range (roughly 1.6 MHz to 23 MHz), ensure jumper W37 (W1037) on the Logic Board is installed. : To enable transmit across the entire covered

Older M700s drift like a lost buoy on a cold morning. Install a Temperature Compensated Crystal Oscillator (TCXO) module. Remove the stock 30 MHz crystal oscillator and drop in a 1 ppm TCXO unit (available from Icom dealers or eBay). This is critical for 10m and 15m operation.

The Icom IC-M700, originally a 150-watt marine HF SSB radiotelephone from the 1980s

: 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.