Unlock the transmitter to cover the full 0.5 MHz to 30 MHz range of its receiver.
Many users report that adapting an Alinco microphone significantly improves modulation depth and clarity.
Below is a guide to the most common modifications, maintenance hacks, and performance upgrades for the TKM-707. 1. MARS/CAP Modification (Wideband Transmit) kenwood tkm707 mods
While the TKM-707 has a "large efficient cooling system," it can still get very warm during long high-power transmissions.
2. Page 3. MAINTENANCE AND ADJUSTMENT. TKM-707. Adjustment 1-1. Cover removal Before removing the cover, turn the DC power supply' Repeater Builder® Unlock the transmitter to cover the full 0
If you find your transmit audio is thin or "tinny," a common hardware swap involves the microphone.
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. Page 3
For heavy amateur radio use (like FT8 or RTTY), adding a small 12V computer fan to the rear heatsink is a highly recommended non-invasive modification to prevent thermal throttling. 5. Technical Quick Reference Original Spec Modified Potential TX Frequency Marine Bands Only 1.6 MHz – 30.0 MHz Power Output Stable at 150W with cooling Memories 198 Channels Fully programmable via front panel Antenna Tuner Works with AT-300 Compatible with various LDG tuners via interface mods