Dave; Are you able to choose where on the side of the tank (IE, facing a particular direction) or are you stuck with a specific spot? I don't have any charts to reflect this, but a repeater I helped maintain had a remote receiver on a water tower. Unfortunatly, the only spot the antenna could be placed was on the side facing opposite of the area we were trying to improve RX to. It gave us a considerable null in the desired area, with audio being worse into the RX site than the main repeater site. I would suggest 1/2 wave away from the surrounding metal as a minimum, but try and get as far away as you can.
-----Original Message----- From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] Behalf Of Dave VanHorn Sent: Friday, January 26, 2007 1:17 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Antenna on the side of a water tower Can anyone point me to something that will show me the antenna pattern for a VHF and UHF antenna mounted on the side of a water tank at different distances from the tank? I've been offered a site, but I can't have top mount, I have to go on the side. I have the mfgr's docs showing pattern with different distances between the loops and the mast, but I don't have any info on how the big metal tank reflection will disturb the pattern. I'm sure there's an optimal distance, but I don't know what it would be.
