__full__ - Kenwood Tkm707 Mods
The Kenwood TKM707 is a legendary dual-band FM mobile transceiver known for its "tank-like" build quality and excellent audio. While it is an older unit, several popular modifications can modernize its functionality or expand its capabilities. 🔓 Frequency Expansion (Mars/Cap Mod)
3.3 RF Power Adjustment
Difficulty: Easy (internal pot)
Procedure: kenwood tkm707 mods
The Kenwood TKM-707 Go to product viewer dialog for this item. The Kenwood TKM707 is a legendary dual-band FM
The Method: Requires removing a specific zero-ohm resistor (jumper) on the control board. Procedure: Disconnect power and remove the top/bottom covers. Locate the control unit (behind the front panel). Find the small surface-mount jumpers labeled W1, W2, etc. Removing W1 typically opens the transmit range. Power down and disconnect all cables, especially the
Common Kenwood TK-M707 Mods and Upgrades
Step-by-Step Procedure:
- Power down and disconnect all cables, especially the antenna and DC power.
- Remove the case cover: There are 6-8 screws on the top and bottom covers. The bottom cover provides access to the main logic board.
- Locate the diode matrix: On the TKM-707, look for the digital control board (mounted perpendicularly or flat depending on revision). You are looking for a small group of diodes labeled D22, D23, D24, D25. Sometimes they are in a row of 4 or 5 near a jumper block.
- Document the current configuration: Before cutting, record which diodes are present.
- Remove D22 and D23: Using fine pliers, carefully rock the diode back and forth until the leads break, or desolder it. Do not damage the pads.
- Leave D24 and D25 intact (or remove all depending on the desired range – see table below).
Safety and Precautions
- Technical Skill Level: Many of these mods require a high level of technical skill, including soldering, understanding RF circuitry, and alignment procedures.
- Warranty and Legality: Modifying your radio can void warranties and, in some cases, may not be legal in your region. Ensure compliance with local regulations.
He hesitated. The TKM-707 had saved him twice—once in a whiteout, once when the main engine died and he needed a tow. Respect. But also, it was just atoms.