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Compared to modern Chinese 100W radios, the Kenwood is quieter, has no birdies, and produces a clean signal. The only missing features are a spectrum scope and built-in sound card.
Improve frequency stability.
With these mods, your "old boat anchor" becomes a contest-worthy, portable, or emergency HF station. For the DIY ham who isn't afraid of a schematic, the Kenwood TKM-707 represents the best value in high-power SSB today.
This paper is a draft for informational purposes only. Modifications described may violate FCC/ITU regulations, void warranties, or damage equipment. Perform mods at your own risk.
Users generally praise the radio's "bulletproof" build, but note several quirks that mods can address: Articles for Kenwood 'TKM-707' - mods.dk
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(Dual-band Amateur Mobile). Many online "MARS/CAP" or resistor-removal mods—such as removing resistor 0 or 3 for extended TX/RX—apply specifically to the and are not compatible with the TKM-707 marine unit. pinout details for the TKM-707's antenna coupler or microphone connectors? ssb radiotelephone - tkm-707 - Manuals (Repeater Builder)
: Intermittent reception and audio distortion are common reported issues, often resolved by ensuring a solid connection to a copper ground plane and engine block rather than a simple internal mod. Common Repairs (Service Notes)
Frequency expansion on the TKM-707 is controlled by a diode matrix located on the control board behind the front panel.
Compatible with the automatic tuner for wide-range matching
To perform these modifications, you will need to open the radio's case and locate these diodes on the main circuit board. Clipping one or more of these diodes will expand the radio's capabilities for ham radio use.
Compared to modern Chinese 100W radios, the Kenwood is quieter, has no birdies, and produces a clean signal. The only missing features are a spectrum scope and built-in sound card.
Improve frequency stability.
With these mods, your "old boat anchor" becomes a contest-worthy, portable, or emergency HF station. For the DIY ham who isn't afraid of a schematic, the Kenwood TKM-707 represents the best value in high-power SSB today.
This paper is a draft for informational purposes only. Modifications described may violate FCC/ITU regulations, void warranties, or damage equipment. Perform mods at your own risk.
Users generally praise the radio's "bulletproof" build, but note several quirks that mods can address: Articles for Kenwood 'TKM-707' - mods.dk
This public link is valid for 7 days and shares a thread, including any personal information you added. This link or copies made by others cannot be deleted. If you share with third parties, their policies apply. Can’t copy the link right now. Try again later.
(Dual-band Amateur Mobile). Many online "MARS/CAP" or resistor-removal mods—such as removing resistor 0 or 3 for extended TX/RX—apply specifically to the and are not compatible with the TKM-707 marine unit. pinout details for the TKM-707's antenna coupler or microphone connectors? ssb radiotelephone - tkm-707 - Manuals (Repeater Builder)
: Intermittent reception and audio distortion are common reported issues, often resolved by ensuring a solid connection to a copper ground plane and engine block rather than a simple internal mod. Common Repairs (Service Notes)
Frequency expansion on the TKM-707 is controlled by a diode matrix located on the control board behind the front panel.
Compatible with the automatic tuner for wide-range matching
To perform these modifications, you will need to open the radio's case and locate these diodes on the main circuit board. Clipping one or more of these diodes will expand the radio's capabilities for ham radio use.
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