Sunday, January 14, 2018

Mobile Setup on HF and the Jeep JK

A few people have been asking about my mobile setup. The Jeep is a 2013 2 Door JK. I use a Yaesu FT-891 for HF. My requirements were pretty simple, I needed to be on 60 meters at the very least but wanted all the other bands as well down to 80 meters. The Yaesu FT-891 was cumbersome to put on 60 meters but a firmware update made that a little easier. I decided to just program all the frequencies I needed to be able to access them quickly.

HF and VHF/UHF Bodies mounted in the back of the Jeep

The FT-891 with a mount I picked at HRO that bolts to the passenger seat bolt
The mic is for the Kenwood VHF/UHF. The HF mic is out of view

The antenna was the hard part but most of that was just figuring out how to mount it. I have an AEV rear bumper and while this allows for a nice spot for the VHF antenna the HF antenna needed a little imagimnation.

The mount is a Breedlove Ball Mount and the antenna coil is a Wolfriver Coil.  (I have had dealings with Wolfriver Coils with their portable vertical antenna that worked well during a recent DOD HF exercise I was involved it). The ground system is bonded to the frame of the Jeep and was relatively easy to do with a few grounding straps.

On top of the coil is a 102 inch whip and it will tune 15 meters and down. The whip itself (without the coil) works well on 27 and 28 MHz which gave me the best of both worlds.

So far I have been able to check into the nets I usually check into. I am weaker than normal but that is understandable as this is a compromised system at best and I only use 25 watts on HF.

Here are a few more pictures.
Coil and Whip

Ball Mount on bumper

The whip is tied off on the hood mounted jack/VHF/UHF Antenna above tire

The whip tie down
I often operate with the antenna still tied down because I am usually trying for a NVIS situation. It also helped to figure out the coil settings for several of the main frequencies. Using this coil on the ham bands is easy once you figure out how many clicks to move up or down.

72 Frank

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