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Kenwood Tkm707 Mods Direct

The Kenwood TKM-707 is a rugged, 150-watt PEP marine SSB transceiver, widely used on commercial and recreational vessels. Its popularity among amateur radio operators (hams) stems from its robust build, high output power, and relative affordability on the used market. However, the unit is factory-locked to marine frequencies (1.6–30 MHz, primarily in 2 kHz steps for ITU channels). This report details the most requested modifications to expand frequency coverage, improve performance, and adapt the unit for general coverage and amateur bands.

If you find a TKM-707 for under $300, do the MARS mod + power adjustment + backup battery. Skip the 200W temptation and the advanced IF tap unless you love tinkering. For under $400 total invested, you’ll have a rugged, high-power HF rig that will survive a lightning strike better than any modern SDR. kenwood tkm707 mods

Default = 100 channels. To get 200:

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