As an astronomy geek and astroimager I use a number of different ways to align
an assortment of VHF/UHF etc antennas. You can look up the exact azimuth
bearing of the sun, or moon, or Venus etc, etc, etc and simply stand back from
the tower and line up the boom to that object. I have also done so dozens of
times using the north star and have no trouble shinning a flash light up an 85'
tower to see the booms and Polaris at the same time. Even bright stars etc can
be used. So pretty much, day or night, even with light cloud cover you have
many ways to get aligned in a matter of a few minutes.
Gedas, W8BYA
----- Original Message -----
From: "Hans Hammarquist via TowerTalk" <towertalk@contesting.com>
To: towertalk@contesting.com
Sent: Friday, January 27, 2017 10:14:11 AM
Subject: [TowerTalk] Fwd: Strange etc
I like that method. Will try it.
I have one problem though, you will have the time for the solar noon at that
day but you will only know it after the day is over. As the solar noon changes
a little every day you don't know what it is the next day. You might be off by
several part of one degree. :-) Just kidding!
I think your method is way good enough for most if not all our purposes. If you
need it better you have to get a gyro compass. That will show the true north,
but how picky do you want to be?
73 de,
Hans - N2JFS
-----Original Message-----
From: Ed Karl <edk0kl@centurytel.net>
To: towertalk <towertalk@contesting.com>
Sent: Thu, Jan 26, 2017 9:40 pm
Subject: [TowerTalk] Strange etc
A. The time between local sunrise and sunset is solar noon, in North
America is in the middle.
Therefore any shadow point to True North.
B. With most HF antenna having 3db points for the forward lobe having
the smallest angle of 30 degrees
why are we picking nits over finding magnetic north away from buildings
and the deviation that day to
compute True North to get 1 degree accuracy?
To me on a circuit to ZS or G, it's "good enough" with the old sundial
method from here in Missouri.
Or what am I missing?.
73!
ed K0KL
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
|