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

[K8RI]

On 10/26/2012 1:06 AM, Bob K6UJ wrote:
> Rick,
>
> In the northern hemisphere we can locate the north star for true north.

That's about one degree off if you are looking for precision.
My low power alignment scope has a circle of parallel lines. If the 
scope is aligned correctly Polaris will travel around "in the race track"

73

Roger (K8RI)


  Thats how I located true north at my qth.
> You cant see the north star in the southern hemisphere but I understand you can see the southern cross which is true south.
> You might google how to find south from the southern cross and see if it would work for you.
>
> Bob
> K6UJ
>
>
>
> On Oct 25, 2012, at 9:12 PM, Rick Kiessig wrote:
>
>> Thanks for the replies so far -- as I said in my OP, I know how to find true
>> north. I already went through the compass/declination/rough-alignment when I
>> first put the antenna up. I know about the shadow technique as well [FWIW,
>> in the southern hemisphere the sun is in the north and shadows point due
>> south at solar noon]. What I'd like to do now is calibrate pointing
>> direction with some degree of accuracy, based on something more concrete
>> than just eyeballing it.
>>
>> Also, I realize a 3-el Yagi has a reasonably wide 3 dB forward lobe (appx 66
>> deg). I'm not concerned with the accuracy of where I'm pointing the center
>> of the lobe; I'm ultimately interested in managing placement of its edges,
>> where gain drops off quickly.
>>
>> 73, Rick ZL2HAM
>>
>>
>>
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