The TKM-707 has a 6-pin mini-DIN jack on the back labeled "REMOTE." It is standard Kenwood CAT (Computer Aided Transceiver). However, with a simple transistor inverter circuit (2N2222 and a few resistors), you can build an adapter that allows Ham Radio Deluxe , Flrig , or PC-ALE to control the radio. Imagine clicking a frequency on a digital waterfall and your rugged marine radio instantly QSYs there. This mod brings the TKM-707 screaming into the 21st century.
Before we dive into the world of mods and upgrades, it's essential to understand why you might want to modify your Kenwood TK-M707 in the first place. Here are a few reasons: Kenwood Tkm-707 Mods