The most common modification for the TM-G707 is opening up the transmitter and receiver to cover frequencies beyond the standard amateur bands (144-148 MHz / 440-450 MHz). This is achieved by removing or relocating specific Surface Mount Device (SMD) resistors on the main control unit, as described in technical documentation from RadioMods.co.nz and QSL.net .
: Find the row of configuration diodes (D8–D15) on the board. Perform the Mod Remove Diode D12 to enable out-of-band transmission. Some regional versions may require checking to unlock specific marine vs. amateur channel steps. Reset the Radio
Remove or lift the resistor labeled 0 . This action expands the receiver coverage to roughly 118-999 MHz (with some gaps). kenwood tkm707 mods
The internal chassis contains several variable resistors (VR) for fine-tuning audible alerts: Beep Tone: to adjust the volume of the keypress beeps. Alarm Tone: Switch to Alarm Test mode and use to set the desired level for the 2182 kHz alarm tone. Antenna System Tuning:
relies on external antenna couplers to achieve a clean 50-ohm match across wide frequencies. The most common modification for the TM-G707 is
A known issue in Kenwood digital boards of this era is cold solder connections . Resoldering the main PCB and cleaning the Molex connectors can fix erratic behavior. 4. Cooling System Enhancement
For more information on Kenwood TK-M707 mods and upgrades, be sure to check out the following resources: Perform the Mod Remove Diode D12 to enable
Disclaimer: Modifying radio equipment alters its type-acceptance profile. Always ensure your transmissions comply with local amateur radio licensing regulations and frequency allocations before operating on expanded bands. If you are currently working on a physical unit, tell me:
features 198 memory channels (including 150 factory-programmable and 62 user-programmable), advanced users often mod the unit to allow for more flexible VFO (Variable Frequency Oscillator) tuning similar to a standard ham radio Hardware & Connectivity Mods
Audiophiles and DXers often modify the audio output stage to lower the low-frequency cutoff point.
is a high-performance marine SSB radiotelephone designed for the 2 MHz to 30 MHz range. While technical modifications (mods) for this specific marine unit are less common than for its amateur radio counterparts, they generally focus on expanding frequency coverage or integrating with external equipment. Overview of Known Modifications Modifications for the Kenwood TKM-707