The TKM-707 is a rugged radio, but it generates significant heat, particularly if you plan on using it for high-duty cycle operations like packet radio (data modes) or long FM transmissions.
The Fan Mod: Older commercial radios were often installed in vehicles with constant airflow or climate control. kenwood tkm707 mods
The Kenwood TKM-707 is a rugged, 150-watt PEP marine SSB transceiver, widely used on commercial and recreational vessels. Its popularity among amateur radio operators (hams) stems from its robust build, high output power, and relative affordability on the used market. However, the unit is factory-locked to marine frequencies (1.6–30 MHz, primarily in 2 kHz steps for ITU channels). This report details the most requested modifications to expand frequency coverage, improve performance, and adapt the unit for general coverage and amateur bands. The TKM-707 is a rugged radio, but it
The stock fan only runs when the PA gets very hot. For digital modes, this is insufficient. The Kenwood TKM-707 is a rugged, 150-watt PEP
The Kenwood TKM-707 is a legendary transceiver in the amateur radio community. Known affectionately as the "Commercial Grade" mobile rig, this 2-meter radio has developed a cult following due to its robust receiver front end, simple interface, and rock-solid transmit audio. Originally designed for the commercial land mobile market, many of these radios have found their way into the hands of amateur radio operators.
However, because the TKM-707 was built for specific commercial bands, "out of the box" performance for the average ham can be limited. Whether you are looking to expand the frequency range, improve the audio quality, or simply modernize the internals, modifying the TKM-707 is a rite of passage for owners.
Here is a comprehensive guide to the most popular and effective modifications for the Kenwood TKM-707.