> Isn't there some restrictions on structures that can effect the
> field-strength
> when the structure is near a BC station? I want to remember that if your
> tower affect the field-strength distribution of a BC station you have to take
> measure not to disturb it.
>
> I am sure, if you have any sizable voltage/current induced by a nearby BC
> station you certainly change the radiation pattern from that station.
>
> Just something to be aware of.
>
> Hans - N2JFS
I recall a rule that commercially licensed stations must take the effects of
their tower on nearby BC stations into consideration, but I have never seen
anything in Part 97 requiring hams to take a similar precaution, nor have I
ever heard of a ham receiving a notification that his antenna was causing a
problem. As I recall, even a 50 ft tower as far as a mile away may affect the
directional pattern of some AM BC arrays.
Don k4kyv
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