Kenwood Tkm707 Mods: |top|

), but unlocking transmit outside of marine bands often requires internal hardware jumper or diode changes located on the control unit PCB. 2. Internal Level Adjustments TKM-707 Service Manual

To extend the frequency coverage into amateur radio bands (e.g., 80m, 40m, 20m) or commercial bands outside the default marine channels.

The TKM-707 is rated for 150W PEP. However, many units drift with age, and the final transistors (2SC2879) can be pushed further – but do so at your own risk. The most useful mod here is and setting a stable 100W carrier . kenwood tkm707 mods

Expanding transmit frequencies is for emergency or authorized use only. Transmitting on non-amateur frequencies without a license is illegal.

: Over decades, electrolytic capacitors can drift in value or leak. A common restoration project involves "re-capping" the power supply and audio stages to maintain the signal clarity that Kenwood marine equipment is known for. ), but unlocking transmit outside of marine bands

features a massive cooling system that allows it to transmit at a full 150W for over an hour continuously. This makes it a favorite for "bulletproof" base station setups where reliability is more important than flashy features. Preservation and Heritage The story of the

provides detailed circuit descriptions, block diagrams, and PCB views necessary for locating zero-ohm resistors or diodes often involved in frequency expansion The TKM-707 is rated for 150W PEP

Now test on a dummy load or ham bands into an antenna. You should be able to key up on 7.200 MHz LSB.