This is the most common modification. It allows the radio to transmit outside the standard amateur bands.
: For older units, remove the final amplifier assembly, clean off the dried factory thermal paste, and apply modern non-conductive ceramic thermal compound. Digital Mode Interfacing
This typically involves removing specific surface-mount diodes or 0-ohm resistors on the control board. Professionals often perform this during a full alignment or capacitor replacement service . 2. Audio & Modulation Upgrades kenwood tkm707 mods
Electrolytic capacitors in the power supply and audio stages are prone to leaking. A proactive recap kit installation can prevent board damage.
On the main circuit board (the Control Unit), there is often a specific diode matrix or jumper configuration. This is the most common modification
John discovered that a common mod to reduce TX IMD on the TK-M707 involved adjusting the bias of the final amplifier transistors. He obtained the required documentation and tools, then carefully made the necessary adjustments. After testing, he was pleased to see a noticeable reduction in IMD on his transmitted signals.
's capabilities beyond its factory-set marine channels. Detailed schematics and procedures for these modifications can be found in the archives at mods.dk Frequency Expansion: Audio & Modulation Upgrades Electrolytic capacitors in the
If you are looking to do these mods today, here is the technical reality check that many "mod sheets" leave out: