I notice that typical ham rotator loops involve an unsupported loop that
is perpendicular to the mast, and attached at top and bottom. It seems
to me that this means a lot of flexing through 360 degrees, and in the
wind. I have also noticed that TV station remote trucks seem to use
another solution for their rotating dishes - they wrap a few turns of
coax loosely around the mast, so that a one-turn rotation only slightly
loosens or tightens the wrap. Seems like this would be a better, more
durable practice for ham installations too.
73, Pete N4ZR
The World Contest Station Database, updated daily at www.conteststations.com
The Reverse Beacon Network at http://reversebeacon.net, blog at
reversebeacon.blogspot.com
On 2/26/2010 8:45 PM, Rick Karlquist wrote:
> Even if you obey the minimum bend radius, the coax
> can fail from metal fatigue or dielectric flow.
> What might be best is to use very flexible coax
> but put it inside a fairly inflexible piece of hose
> or tubing. Then you never approach the bend
> radius of the flexible coax.
>
> Rick N6RK
>
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