Enthusiasts prize the 707 for its "neat" and broadband-capable circuitry, making it more flexible than some other rigid marine-only sets. required for frequency expansion? Articles for Kenwood 'TKM-707' - mods.dk
The radio has a sharp Collins mechanical filter (often 2.4 kHz for SSB). For AM broadcast listening or DRM, this is too narrow.
: The unit is designed for continuous transmission, but the rear can get very warm during high-power operation. Users sometimes add external quiet fans to the rear heatsink to extend the life of the final power transistors.
When operating any HF radio equipment, it is essential to adhere to local and international laws. Kenwood Tkm-707 Mods
While it comes from the factory optimized for international marine bands, amateur radio operators, MARS/CAP volunteers, and marine enthusiasts frequently look to modify this radio. unlock the hardware’s true potential, transforming it from a channel-restricted marine set into an all-band HF powerhouse. Hardware Modification Safety Precautions
However, the TKM-707 came out of the box with maritime restrictions. To make it sing on the ham bands, you need to perform a few key modifications.
: Gain access to the digital control board (which houses the primary CPU chip and the EEPROM). Enthusiasts prize the 707 for its "neat" and
Desolder the VCO shield cover, clean it thoroughly with an abrasive brush, treat it with an anti-corrosion barrier, and resolder it firmly to the ground plane.
To perform these modifications, you will need to open the radio's case and locate these diodes on the main circuit board. Clipping one or more of these diodes will expand the radio's capabilities for ham radio use.
This generally involves addressing the hardware-based frequency limiters established during manufacturing to meet specific maritime type-acceptance standards. For AM broadcast listening or DRM, this is too narrow
From the factory, the TKM-707 is a capable 150-watt PEP SSB radiotelephone, though many have found their units outputting less, sometimes due to age or conservative factory alignment.
Comprehensive Guide to Kenwood TKM-707 Modifications (Mods) Kenwood TKM-707
involves both physical alterations and electrical adjustments. Due to its age, many modifications are documented in archive sites, similar to those found on mods.dk 1.2.1. 1. Frequency Coverage and Regulatory Considerations One of the most discussed topics regarding the