Note: Frequencies will now unlock, allowing MARS, CAP, and amateur HF transmission. Audio and Modulation Enhancements
details several user-adjustable internal settings that are often treated as functional mods: Beep Tone Level : Adjusted via Alarm Tone Level : Adjusted via after selecting Alarm Test mode. Squelch Sensitivity
Inside the bottom cover, locate the PA (Power Amplifier) board. You will see a row of small potentiometers (usually blue or white squares with a cross slot). The key ones are: kenwood tkm707 mods
Some hobbyists replace the internal electrolytic capacitors in the audio power amplifier circuit . Using modern, high-quality capacitors can sharpen the audio output and reduce background hiss that may have developed as the original components aged. 3. Improving Cooling for High-Duty Cycles
However, because it was originally engineered strictly for marine communications, unlocking its full potential on amateur radio bands requires targeted . Whether you are a radio hobbyist looking to convert this commercial rig into a dedicated shack base station or an ocean cruiser seeking expanded transmission frequencies, modifying the Kenwood TKM-707 Go to product viewer dialog for this item. Note: Frequencies will now unlock, allowing MARS, CAP,
Because this unit is often used in marine environments, "modifications" frequently involve upgrading vulnerable components: Grounding Improvements
Now that we've covered the basics, let's take a look at some common mods and upgrades for the Kenwood TK-M707: You will see a row of small potentiometers
: Marine radios are strictly certified for specific bands. Confirm your modified TKM707 does not emit excessive harmonics or spurious emissions on amateur frequencies by testing it with a spectrum analyzer or dummy load.
Gently desolder and remove the target diode. Save the diode in case you need to restore factory marine-only restrictions later.
Modifications involving the removal of internal components should only be performed with a Service Manual and proper ESD protection to avoid bricking the radio. ssb radiotelephone - tkm-707 - Manuals (Repeater Builder)