"Mark" wrote in message
ups.com...
I'm installing a Raymarine SL72 radar and will end up about 2 meters
short on the display to radome cable. Rather than use the expensive
Raymarine extensions, I plan to build my own. I assume that the coax
should be 50 ohm, not 75, but I don't know for sure. Anyone know?
Thanks.

Its a multiconductor cable with power, data and video. I have spliced a lot
of these for sailboaters after the cable was cut for stepping a mast, etc.
Also put in a connector splice for one guy who had his scanner stolen a
couple time off his trailered boat. Frankly, I would go with a 5 meter
longer cable and post the short one you have on eBay. The splices are
difficult to weatherproof, the connectors will have to purchased from a
dealer or Raymarine and you will need some good soldering skills. I use
resistance tweezers soldering tools for these connectors. Some sailboats
that cut the cable below decks have used a standard terminal strip or
Euro-connector (set screw) in a weather proof box without problems. That
method might work OK for you. The best way to avoid losses and future
intermittents is go with a new longer factory made cable.
73
Doug K7ABX