Kenwood Tkm-707 Mods Now

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

1. TK-M707 SSB Mod: Enable single-sideband (SSB) mode for improved voice communication.
2. Wideband Reception Mod: Upgrade your radio to receive a wider range of frequencies.
3. Output Power Increase Mod: Increase your radio's output power for improved transmission range.
4. APRS (Automatic Packet Reporting System) Mod: Add APRS capabilities to your radio for real-time packet communication.

Benefit:

Reduces drift from ±50 Hz to ±1 Hz over temperature. Kenwood Tkm-707 Mods

• Frequency counter (to 30 MHz)
• 50Ω dummy load, 150W min
• RF wattmeter (Bird 43 or equivalent)
• Small-tip soldering iron (for SMD diodes)

1. Press FUNC then VFO/M.CH to enter VFO mode.
2. Press FUNC then A/B to select VFO A or B.
3. Press FUNC then STEP. Turn the main dial until "OFF" appears (or the finest step, 10 Hz).
4. Now, to kill the "channel snap," press FUNC + SCAN to enter the menu.
5. Rotate the dial until you see "CH. STEP".
6. Change this from "CH" (Channel step) to "FREQ" (Frequency step).
7. Exit the menu.

| Modification | Improvement | Difficulty | |--------------|-------------|-------------| | Re-capping PSU board | Reduce ripple/noise | Medium | | Adjusting TX bias (VR1, VR2 on RF unit) | Better IMD | High (requires service monitor) | | Adding heatsink fan (12V triggered by TX) | Reduced PA temperature | Low | The Kenwood TKM-707 Go to product viewer dialog