[BVARC] 3 element 10 meter Beam question
Gayle Dotts
gayle.dotts at gmail.com
Tue Mar 23 11:37:22 CDT 2021
Florida...I point it East
Kentucky...I point it North-east
Wisconsin...I point it North
Every now and then, I do get those states but for the most part its South
America all over.
On Tue, Mar 23, 2021, 10:25 AM Roy Storey via BVARC <bvarc at bvarc.org> wrote:
> Gayle, Daytime contacts are common on 10 meters during the daytime because
> of what is called "Trans-equatorial Propagation". That is, signals pass
> across the equator.
> I won't go into specifics on this subject but if you will Google
> "Trans-equatorial Propagation", you will find detailed explanations that
> will answer your question.
>
>
> On Tue, Mar 23, 2021 at 10:08 AM Jonathan Guthrie via BVARC <
> bvarc at bvarc.org> wrote:
>
>> Because with ionospheric propagation, the signals come back to earth in
>> distinct rings at specified distances from you. You can talk to people at
>> that distance, but not to distances closer or farther away.
>>
>> If you want to know the why of that, then my explanation gets all kinds
>> of hand-wavy, and not terribly convincing. There is a frequency-dependent
>> component and an angle-dependent component, but it's why NVIS works better
>> on the "low bands" than on 10m.
>> On 3/23/2021 10:00 AM, Gayle Dotts via BVARC wrote:
>>
>> 16 feet vs 22 feet height, as it pertains to takeoff and distance
>> achieved. I assume the higher the further is the rule. How come, on days
>> when on 10 meters (with propagation) I can contact all over South America
>> but can not for the life of me get North Carolina or Kentucky or Florida
>> during the day?
>>
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