: The rear of the unit can get warm during long transmissions. Adding an external fan to the rear heatsink is highly recommended for 150W operation. Source ⚠️ Important Technical Notes
: Excellent for sourcing the official Service Manual , which provides the circuit diagrams and component locations (like the PLL and control boards) necessary for identifying modification points. Essential Service Notes kenwood tkm707 mods
A known issue with older Kenwood units is "cold solder" joints. If your display flickers or the digital controls act erratically, a careful resolder of the components on the X54-1160-00 digital PCB can bring the unit back to life. Beep & Alarm Levels: : The rear of the unit can get