Because these units are decades old, certain "maintenance mods" are required to keep them operational.
Electrolytic capacitors in the power supply and audio stages are prone to leaking. A proactive recap kit installation can prevent board damage.
Unlock the transmitter to cover the full 0.5 MHz to 30 MHz range of its receiver. kenwood tkm707 mods
The most sought-after mod for the TKM-707 is the MARS/CAP (Military Auxiliary Radio System) expansion. By default, the TKM-707 is locked to marine frequencies and will not transmit on amateur bands.
Many users report that adapting an Alinco microphone significantly improves modulation depth and clarity. Because these units are decades old, certain "maintenance
The TKM-707 uses a coin-cell battery to retain memory channels. If your radio resets every time it's powered off, you'll need to replace this battery , which may require soldering.
You can fine-tune the beep and alarm tone levels using internal potentiometers (VR7 for beep, VR6 for alarm) if they are too intrusive during operation. 3. Essential Maintenance "Mods" for Reliability Unlock the transmitter to cover the full 0
Below is a guide to the most common modifications, maintenance hacks, and performance upgrades for the TKM-707. 1. MARS/CAP Modification (Wideband Transmit)
2. Page 3. MAINTENANCE AND ADJUSTMENT. TKM-707. Adjustment 1-1. Cover removal Before removing the cover, turn the DC power supply' Repeater Builder®
While the TKM-707 has a "large efficient cooling system," it can still get very warm during long high-power transmissions.