[TowerTalk] North

[Roger (K8RI) on TT]

What is this fixation wit accuracy and pointing antennas?

The road by our house runs N/S and is close enough.

On HF +/- 10 degrees should be "close enough.  Even with large arrays 
"That looks about right" with most of us is more than close enough.

The only time you need accuracy to a "few" degrees or better is with 
VHF, UHF and up,  arrays.  Dish antennas do need precision as does 
Astrophotography.  Now that's into the less than 1 degree. Aeronautical 
charts with the Isogonic lines tell you how far a magnetic compass is 
off in your area.  That gets you into the ballpark.

Using a 10" Schmidt Cassagrain The N star isn't even in the field of 
view at true north with a low power eyepiece.  Here a magnetic compass 
is only a few degrees off.  Within a 150 miles it may be off 30 degrees 
or more.

73

Roger (K8RI)

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