Icom M700 | Mods [2021]
Modifying your ICOM M700 may void any remaining warranty, violate laws if done improperly (e.g., transmitting out of band), and requires technical skill. Always check your local regulations. Proceed at your own risk.
Icom IC-M700 is a classic marine HF transceiver that has become a popular project for radio amateurs due to its rugged build and relatively low cost on the used market. To make this commercial-grade radio suitable for hobbyist use, several internal modifications are commonly performed by the amateur community. Core Amateur Radio Modifications
Remove the top and bottom covers of the transceiver. Locate the logic/control circuit board.
For dedicated hobbyists, there is the possibility of the ultimate M700 project: merging an IC-M700D (or F) with an IC-M700 to create something approaching an IC-700TY. While complex, this approach acknowledges that the baseband stability of the TCXO makes the USB-only M700D a perfect transceiver for digital modes. By combining the stable TCXO from one unit with the full-mode capabilities of another, an exceptional amateur station can emerge. icom m700 mods
For the classic IC-M700, clipping or removing a specific diode (typically or D28 , check your specific schematic variant) disables the factory frequency lock.
The transmit restrictions on the IC-M700 are governed by a diode matrix on the main control board. By altering this matrix, you can enable continuous transmit capabilities.
In this article, we'll delve into the world of Icom M700 mods, exploring the various upgrades and modifications available, their benefits, and how to install them. Whether you're a seasoned boater or a DIY enthusiast, this comprehensive guide will help you unlock the full potential of your Icom M700. Modifying your ICOM M700 may void any remaining
: For those requiring high frequency stability (e.g., for digital modes), boards like the Leo Bodner reference injection board can sometimes be adapted to override the internal oscillator with an external source.
Now fire up the soldering iron, download the IC-M700 service manual (available freely on Mods.dk), and give this marine dinosaur a new life on the air. 73.
Unlocking the radio allows continuous transmission across the entire HF spectrum (typically 1.6 MHz to 23.999 MHz), giving you full access to all amateur radio bands (such as 80m, 40m, 20m, 15m, and 10m). The Diode Matrix Modification Icom IC-M700 is a classic marine HF transceiver
Understanding Icom IC-M700 Modifications: An Overview for Enthusiasts
Warning: This involves soldering on delicate surface-mount pads. If you are uncomfortable, find an experienced tech.
Disclaimer: Modifying radio equipment requires technical knowledge and soldering skills. Unauthorized transmission on certain frequencies may violate local laws and regulations. Frequency Expansion (General Coverage TX)
