Kenwood Tkm-707 Mods May 2026

Disclaimer: This paper is a draft for informational purposes only. Modifications described may violate FCC/ITU regulations, void warranties, or damage equipment. Perform mods at your own risk.

As these units age, modifications often focus on longevity and thermal management. Because the

The Kenwood TKM-707 Go to product viewer dialog for this item. Kenwood Tkm-707 Mods

Steps to enable "Screwdriver" VFO mode:

The 9 MHz Oscillator Mod

The radio generates its carrier frequency based on a 9 MHz IF (Intermediate Frequency). To switch from USB (+1.5 kHz offset) to LSB (-1.5 kHz offset), you need to alter the BFO (Beat Frequency Oscillator) injection. Disclaimer: This paper is a draft for informational

Kenwood TKM-707 is a rugged SSB (Single Sideband) marine radiotelephone originally designed for high-performance communication in harsh maritime environments. While it was factory-set for specific marine bands, its "ham-friendly" architecture makes it a popular candidate for modifications that expand its frequency range for amateur radio use or improve its operational versatility. Common Kenwood TKM-707 Adjustments and Maintenance Most technical interests regarding the

Advanced Noise Reduction: Includes a dual-mode noise blanker (NB-1 for pulse-type noise and NB-2 for long-duty cycle "woodpecker" interference). Mod: Add a 1:1 isolation transformer and 10k

1. TX Power Increase

  • Modification: Increase the transmitter power beyond the factory limit.
  • Purpose: Enhance the signal strength for better communication over long distances.
  • Caution: Be mindful of local regulations regarding transmitter power.

Mod: Add a 1:1 isolation transformer and 10k pot to inject audio into the modulation path (typically after the mic amp, at the junction of C123/R129).