yeah I was waaaaay off, hihi
Bob
K6UJ
On Mar 1, 2012, at 7:03 PM, n8de@thepoint.net wrote:
> 6000 miles from CA to the Caribbean? Not on this planet! 6000 miles from
> your QTH in CA reaches to the Eastern tip of Brazil and a tad beyond.
>
> Try again with your distance measure.
>
> I agree with Guy's tome.
>
> 73
> Don
> N8DE
>
>
>
> Quoting Guy Molinari <guy_molinari@hotmail.com>:
>
>>
>> It all depends on the terrain surrounding your station Bob. HFTA takes
>> your terrain profile and provides a "figure of merit" given your antenna
>> gain and height. You can move the antenna height until you find the
>> optimum result given these factors as well as the incoming/outgoing angles
>> to the targeted area. In this case it is the Carribean.
>>
>> So, bottom line. Use the MicroDem and other tools to get your terrain
>> profile. That is the hard part. The rest is easy.
>>
>> 73,
>> Guy N7ZG
>>
>>
>>> From: k6uj@pacbell.net
>>> Date: Thu, 1 Mar 2012 16:45:43 -0800
>>> To: towertalk@contesting.com
>>> Subject: [TowerTalk] 15 meter yagi height for 6000 miles
>>>
>>>
>>> Has anyone used the HFTA program and can tell me the best height for a 15
>>> meter yagi for 6000 miles.
>>> Assuming there aren't any hills obscuring the take off angle.
>>>
>>> The carribean is about 6000 miles from my qth and from experimenting I
>>> have noticed that lowering the beam
>>> down from 90 feet down to 50 feet it is markedly better for 15 meters.
>>>
>>> I just bought the new antenna handbook and plan to dive in and learn how
>>> to do the HFTA myself but was
>>> hoping someone else had an idea of the best take off angle angle for 6000
>>> miles on 15.
>>> I believe 50 feet is about 3/4 wavelength high and gives me a 20 degree
>>> takeoff angle on 15.
>>> Hope this all makes sense, hihi.
>>>
>>> Bob
>>> K6UJ
>>> _______________________________________________
>>>
>>>
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>
>
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