HF Mobile

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I have an HF mobile setup with an ICOM 706MKIIG, AH-4 Tuner, and 102″ Whip in my 2002 Dodge Dakota. With this setup, I have made numerous contacts around the country and a couple to Europe and Australia while mobile.

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This is the Icom AH-4 tuner. It is referred to as a “tuner” but technically it is an antenna “coupler”. The AH-4 gives the transceiver a good antenna match, regardless of the frequency being used and allows HF operation from 6 meters (50MHz) through 80 meters (3.5MHz) without the need to change the antenna. Note that a correct installation has the shortest possible cable run from the coupler to the antenna using stranded wire, not coax.

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This is the cable run along the inside of the truck bed. RG-8/U coax is being used (although RG-58/U will work fine). The smaller cable is the control cable for the AH-4 tuner. This allows tuning from inside the cab with the push of a button. I have also installed a two way switch which allows me to connect the transceiver directly to a permanent antenna (such as a dipole) when parked for better efficiency.

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Installation of the 706MKIIG remote head on the console.

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A VHF/UHF antenna is permanently mounted in the center of the roof. The 102″ HF whip is mounted at the left rear.

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