Be careful with your guying. Even if the antenna is dead center, the guy points will not be more than 2.1 m from the base. With guy points that close any tension in the guys will be converted almost entirely into downward pressure on the antenna (buckling forces).
You will need multiple guys - at least the top of BB and top of BD and perhaps the top of BT2 (30 meter trap). Based on the "sleeve" at the bottom of BC and double wall of BB, the BC/BB joint and BB section are the most likely to buckle. You want to keep initial tension in the guys to a minimum to reduce the downward force as much as possible with the short guy radius. 73, ... Joe, W4TV On 2014-09-06 6:18 AM, Vic, K2VCO wrote:
I am putting up a Cushcraft R8 antenna on a flat roof that is about 3m x 3m square. The antenna is sitting on a 1m mast; the antenna itself is about 9m tall. It will have four guy ropes to the corners of the roof. What is a good height at which to attach them to the antenna? Are there rules of thumb for this?
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