[TowerTalk] Calibrating antenna direction and using chokes with a beam

[Jim Brown]

On 10/26/2012 10:53 AM, K8RI wrote:
> The shadow technique when combined with the boom of the antenna or 
> used with a Theodolite or transit  is the most precise method of 
> finding true North available to a ham and is going to get you into 
> seconds of arc precision and transferring that to the antenna/rotator 
> can still be kept in the realm of arc seconds. 

I found a government website that provided the time of noon for a 
lat/lon and date that you enter, and used the shadow of my towers to 
show me true north.  If you can be around at noon on a sunny day, it 
works quite well.

73, Jim K9YC