Hi,
Merry christmas to all!
> Agreed that the towers are not
> narrow, but neither are the patterns of the 3-el Yagis on top, and they
> are carefully plumbed to vertical. :)
Yes Jim, and your rotor's brake will move with wind, your tower/mast will flex,
your antenna boom too...
I think for HF seeking better than 5 degrees true north accuracy is pointless.
When using a dish antenna on 10 GHz that might be another story however.
When I was working in telecommunications, the procedure were telling to align
the antennas for the best signal strength.
If your pointing to some low earth orbit satellite, that might be hard to keep
up with the bird moving in the sky.
Happy new year!
73,
Yan.
---
Yannick DEVOS - XV4Y
http://xv4y.radioclub.asia/
http://varc.radioclub.asia/
> Le 25 déc. 2014 à 23:41, towertalk-request@contesting.com a écrit :
>
> Message: 6
> Date: Thu, 25 Dec 2014 08:41:45 -0800
> From: Jim Brown <jim@audiosystemsgroup.com>
> To: towertalk@contesting.com
> Subject: Re: [TowerTalk] north
> Message-ID: <549C3E49.6040703@audiosystemsgroup.com>
> Content-Type: text/plain; charset=windows-1252; format=flowed
>
> On Thu,12/25/2014 5:31 AM, Jim Lux wrote:
>> getting true "north" to even one degree accuracy is harder than it
>> seems at first glance.
>
> My QTH is south of San Francisco. I've aligned both of my rotators to
> true north using the shadow cast by the towers. On a bright day, summer
> or winter, shadows are clearly defined. Agreed that the towers are not
> narrow, but neither are the patterns of the 3-el Yagis on top, and they
> are carefully plumbed to vertical. :)
>
> 73, Jim K9YC
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
|