Kenwood Tkm-707 - Mods =link=

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.

2) RX Sensitivity & Selectivity

• Filter swaps: If available, replace intermediate-frequency (IF) ceramic filters with narrower or higher-quality equivalent to reduce adjacent-channel interference. Match center frequency and impedance.
• Preselector or bandpass: Add an external bandpass filter at the antenna feed to reduce strong out-of-band signals in high-RF environments.
• Alignment: Re-align front-end and IF stages per service manual to restore original sensitivity after aging.

Ethics & Compliance Notes

• Test on dummy load for transmit measurements.
• If operating on-air with modded units, ensure transmissions comply with local amateur radio rules and power/emission limits.

If you want, I can convert this into a step-by-step workshop guide for performing each mod (with example schematics and a suggested parts list). Kenwood Tkm-707 Mods

Title: Unlocking Potential: A Guide to Kenwood TKM-707 Modifications Disclaimer: This paper is a draft for informational

The Kenwood TKM-707 is a legendary radio in the amateur community, not necessarily for its cutting-edge technology, but for its reputation as a "sleeper" rig. Originally a commercial land-mobile radio, it can often be found surplus at a fraction of the price of a dedicated amateur transceiver. However, to make it a usable and enjoyable radio for the 2-meter band, a few modifications are essential. 2) RX Sensitivity & Selectivity

This essay explores the most helpful modifications for the Kenwood TKM-707, categorized by their purpose: expanding frequency coverage, improving audio quality, and optimizing power management.

8) Cooling & Reliability

• Ventilation: Ensure adequate airflow in installation; add foam dust filters to vents.
• Conformal coating: Apply conformal coating to PCBs only if you routinely operate in corrosive or humid environments.
• Replace aged capacitors: Proactively replace bulging/leaky electrolytics in the power/PA sections.

9) Security & Tamper Mods

• Chassis tamper screws: Use security screws for mounting to deter casual theft.
• Hidden antenna feed: Route antenna coax discreetly in vehicle installations.

7. Power Supply and Cooling Upgrades

• Modification: Upgrade the power supply for more reliable power or enhance the cooling system for better heat dissipation.
• Purpose: Improve the radio's reliability and lifespan, especially during heavy use.