[Elecraft] Where to guy?

[Joe Subich, W4TV]

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?