Mods [hot]: Kenwood Tkm-707

Modifying your TKM-707 may void any remaining warranty (unlikely), violate FCC/IC regulations if used on unauthorized frequencies, or damage your radio if performed incorrectly. Proceed at your own risk. This article is for informational purposes only.

Locating the configuration pins on the main logic IC allows you to change the default tuning step. Grounding a specific logic line (refer to your specific board revision schematic) forces the synthesizer into 10 Hz resolution.

: Adjust VR7 on the internal board to change the volume of the operation beep.

adjustments, which are essential for amateur radio communication but may be restricted or less intuitive on marine-specific hardware. MARS/CAP Modifications Kenwood Tkm-707 Mods

: While common for Kenwood amateur rigs like the TM-G707 (which uses zero-ohm resistors), the

: While the TKM-707 is a single-piece unit, some users adapt its mounting brackets or utilize third-party external speakers (via the 4Ω external jack) to improve ergonomics in tight shack spaces or vehicle cabins. Technical Specifications for Modding Current Requirement 30A at 13.6V DC for full 150W output Standard RX Range 500 kHz to 30 MHz (General Coverage) Standard TX Range 2 MHz to 30 MHz (Marine Bands) Output Power High (150W), Medium (50W), Low (25W)

Removing specific diodes opens up the transmit coverage. In most production runs, removing Diode D5 (or cutting its trace) enables wideband transmit from 1.6 to 30 MHz. Modifying your TKM-707 may void any remaining warranty

: This is the most sought-after modification, intended to allow the radio to transmit across its full 2–30 MHz range, including MARS, CAP, and HAM bands.

The information provided in this article is for educational purposes only. The author and publisher disclaim any liability for damages or injuries resulting from the use or misuse of the information contained herein. Always follow proper procedures and consult with experts when modifying your radio.

This public link is valid for 7 days and shares a thread, including any personal information you added. This link or copies made by others cannot be deleted. If you share with third parties, their policies apply. Can’t copy the link right now. Try again later. Locating the configuration pins on the main logic

The radio's internal DIP switches are the key to unlocking advanced service features. The most crucial one is , which switches the radio from "User Mode" to "Dealer Mode". In Dealer Mode, the radio allows for full-frequency memory programming and advanced alignment adjustments, making it indispensable for any serious modification.

[Antenna] ---> [IF Stage (Upgrade Mechanical Filter)] ---> [Audio Amp (Change Caps)] ---> [Speaker] SSB Filter Upgrades

Don't let the "Marine" label scare you. With a screwdriver and 30 minutes of patience, the TKM-707 transforms into a beast of an HF rig. It’s loud, it’s durable, and it loves a long wire antenna on a stormy night.