The only issue I would have with Heliax is the possiblity of cracked and broken solid conductors due to vibration and repeated flexing. If I were the vessel owner, I'd use a good grade (Belden or equivalent) of RG-8 (X if you want). There are not a lot of terrain features out there. I'd think you could talk quite a ways on 25 watts at 70 feet HAAT. 75-100 miles?
GL, Eric Eric Lowell Eastern Maine Electronics Inc. 48 Loon Road Wesley ME 04686 [email protected] www.satnetmaine.com ________________________________ From: Vernon Densler <[email protected]> To: [email protected] Sent: Tue, November 24, 2009 11:17:45 AM Subject: [Repeater-Builder] Best coax for marine use I have been in a big discussion with the guys on my boat list about the right coax for running up the mast for VHF marine radio. Keeping in mind that we are talking about a 70’ or so run going up the center of an aluminum mast, in a salt water environment, and the radio is limited to 25 watts. Also keep in mind that when off shore this is a life line and the best possible send and receive is needed in an emergency situation. So given the criteria what is the best possible coax to use knowing that thickness matters and bend radiuses may be tight? Others on the list are saying “just grab any old 8X type cable and you will be fine”. I say use something with very low loss and suggested small heliax. Any suggestions? Vern s/v Nirvelli KI4ONW
