At 03:07 PM 2/4/2018, Donald Chester wrote:
>> 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
Don -
Commercial tower owners need to detune their towers to insure they don't mess
up an AM broadcast antenna pattern.
In searching for how to detune my tower with a 160 4-square around it, I ran
into a lot of commercial options available for commercial towers.
Just Google "tower detuning".
-- Tom
--------------------------------------------------------------------------------------------------------------------
e-mail: frenaye@pcnet.com YCCC --> http://www.yccc.org/
Tom Frenaye, K1KI, P O Box J, West Suffield CT 06093 Phone: 860-668-5444
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
|