Kenwood Tkm-707 Mods New!

Last updated: 2025 (based on reverse engineering by VK3HZ, N6WS, and JA1HBS).

: While the TKM-707 is already broad, some regional versions have restrictions that can be bypassed via specific diode or resistor removals on the control board, similar to the logic used for the TM-G707 amateur model (though the specific component numbers differ).

to transmit outside marine channels and within the amateur radio (Ham) bands (e.g., 80m, 40m, 20m). Kenwood Tkm-707 Mods

Replace the stock 2.4 kHz ceramic filters (CF1, CF2) with wider Murata filters (2.7 or 3.0 kHz). If you don't want to solder, simply adding a 0.01µF capacitor across the audio amp IC (IC5, pins 2 & 4) boosts the high frequencies.

One of the most common complaints regarding the TKM-707 is its aggressive squelch behavior. Commercial radios are designed to be silent until a very strong signal arrives. For amateur use, where we often listen to weaker signals or marginal propagation, the stock squelch can be too tight, causing the beginning of transmissions to be cut off. Last updated: 2025 (based on reverse engineering by

After performing your , you may encounter issues. Here’s a quick fix guide:

Addressing aging components to ensure the longevity of the radio 1.2.2 . Kenwood TKM-707 Mods and Technical Adjustments Modifying the Replace the stock 2

One major complaint about the stock TKM-707 is the "channelized" feel. You spin the dial, but it snaps to specific 100 Hz or 1 kHz steps depending on the channel set.

can suffer from intermittent operation due to "cold" solder joints on the digital and PLL boards. Resoldering key points on the digital PCB often resolves display or frequency-lock issues.

: Hosts clear PDF copies of the instruction and service manuals for reference during hardware adjustments. Repeater Builder® Common Modification Categories