Replace the stock dynamic element with a high-quality electret condenser element .
The Kenwood TKM-707 is a legendary marine SSB (Single Sideband) transceiver. Radio amateurs and mariners prize it for its rugged construction. However, factory limitations restrict its full potential. Modifying this radio unlocks new frequencies and improves usability.
Note: While this opens the hardware capability, you must legally possess a license to transmit on these out-of-band frequencies. kenwood tkm707 mods
is a 150W SSB Marine Radiotelephone designed for the 2 MHz to 30 MHz range. While internal modifications for this specific marine model are less commonly documented than its ham radio counterparts, users often seek to expand its capabilities for amateur radio or MARS (Military Auxiliary Radio System) use. Frequency Expansion (MARS/CAP Mod)
He adjusted the IF shift. The modded filters narrowed, slicing through QRM like a scalpel. There. A ghostly carrier. Replace the stock dynamic element with a high-quality
: Look for the matrix trace pattern near the central microprocessor. On similar Kenwood logic boards of this generation, clipping a specific diode or removing a designated 0-ohm surface-mount resistor tells the CPU to skip the maritime look-up table and enable continuous transmit (TX) and receive (RX) capabilities.
The AT-300 tuner is effective, but it must be properly calibrated to the specific antenna system in use. However, factory limitations restrict its full potential
For many Kenwood transceivers of this era, frequency expansion is achieved by modifying a small group of surface-mount (SMD) resistors or diodes on the control board.