31 Oct 2011

UHF Installation

So I'm catching up on a backlog of installation documentation at the moment, starting with the installation of my UHF radio back on the 16th October, so here we go.


Components:
  • GME TX3340 UHF Radio
  • ZCG Scalar 6.6dBi Heavy Duty Antenna (1.2M)
  • ZCG Scalar 2.1dBi Flexi Antenna (40cm)
  • Custom UHF Rocker Switch
  • 7mm Split Conduit
  • 3M Brand Double Sided Body Molding Tape
  • 2 Amp Blade Fuse/s
  • Cable ties and incidentals
Installation:
  1. First was the threading of the coax cable into the bar followed by the ZCG Scalar mount (the coax cable comes out the bottom of the base). Once bolted down, I threaded the coax into the 7mm split conduit for the length that would be run inside the engine bay.
  2. Leave some slack on the coax cable coming out of the base and into the engine bay; this will allow the antenna to flex. If the cable is tight and the antenna needs to flex, it'll strain and possibly snap the cable, so check it before securing.
  3. Run the conduit around the engine bay and cable tie to pre-existing conduit runs. If its anything like my FJ, there is heaps across the top of the firewall!
  4. Run the power leads from the Aux fuse block to the rubber grommet in the firewall on the drivers side along with the coax cable. Shield this power run with some 7mm conduit as well.
  5. Run the three cables up above the dash and down into the centre console, all three cables can pre-exist in the same length of conduit quite snuggly.
  6. On the mounting bracket for the radio, apply the 3M mounting tape then mount the bracket to the top of the VSC unit.
  7. Cut the power lead down to an appropriate length. I cut the fuse holder out as I already have a fuse installed at the fuse block. Instead I terminated this with blade clips so they could be installed into the Carling Rocker Switch.
  8. Cut the coax cable for the aerial to the required length. Follow the instructions here for terminating:
  9. I also used some heat shrink on the back of the aerial plug to finish it and make sure it can't short on anything.
  10. Connect the power cable and aerial cable, then bolt the unit to the mounting bracket. Once installed connect the extended cable for the mic and run it behind the unit and out into the drivers foot well.
  11. Connect the extended cable into the mic cable with the supplied adapter, add some 3M tape and install this in the gap behind the centre console. Cable tie the excess of the extension cable.
  12. I didn't want to drill into my panel around the radio, so I epoxied the two microphone bracket pieces together so I had a solid backing, then put some more 3M tape and installed just below the rear demister button.
  13. Finally, since I cut out the fuse in the power line, I needed a 2 amp blade fuse (not easily obtainable, I got a few from Jaycar Electronics) to install into my fuse block.
  14. Once everything is checked, hit the power button and you have comms!



ZCG Scalar Base















Aerial mounted on bar



Conduit run inside engine bay
Base unit mounted in centre console


Mic holder mounted using 3M tape
Mic installed in holder
She's a workin! Blue light is the custom rocker switch

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