[Towertalk] Calculating guy distance for rotating towers

[kk9a@arrl.net]

Adding 1' to the boom does not give 1' of guy clearance unless the guy runs
straight up and down.  Guy clearance should be measured perpendicular to the
guy. In this case for 1' of clearance the guy would be at a 29 degree angle
and the anchor would be 136' from the base of the tower.

John


----- Original Message -----
From: "Mike Gilmer, N2MG" <n2mg@eham.net>
To: "towertalk" <towertalk@contesting.com>
Cc: <kr7o@vhfdx.com>

<SNIP>
This makes guy anchor distance x = 125' for zero clearance.  To get 1 foot
of clearance we change the 25' turning radius to 26' and get: 130'  Then
there's ground irregularities and guy wire sag so you may opt for more
minimum clearance.  Lower the antenna 5 feet and the 1-foot clearance anchor
spacing is only 98 feet  Big difference.  Of course, if you have the room
and the EHS...