[TowerTalk] Re: Variation and Declination

[Joe L Blackwell]

Variations up to 20 degrees is certainly a concern for determining
how best to set antenna directivity.  Just wondering, how wrong could
a person be it the boom of an antenna was pointing right at the
North Star (Polaris), regardless of QTH in Maine or Pacific NW?
de Joe, AA4NN

>Stu Greene <wa2moe@doitnow.com> writes:
> 
> Lines of equal variation are "isogonic lines", and probably can be 
> found on the web. In the United States, the line of zero variation runs
> approximately from  western  Lake Superior southeasterly to just off 
> the Eastern Florida coast.  Places in the US east of that line have
west
> variation and in Northeast Maine as much as  20 degrees.  Places to 
> the west of the zero line have easterly variation and exceed 20 degrees

> in the Pacific Northwest.
>

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