[TowerTalk] [Bulk] 80 mts four square or yagi?

[Bill via TowerTalk]

In modeling at a possible new location I used Google Earth   for one 
direction (north) and then compared it to K6TU's files...pretty  close.  And, the 
graphs produced were also looked pretty  similar.
 
By the way, a tip of the hat to K6TU for making it so easy to  obtain the 
necessary input data to run the HFTA program.  Thank  you! 
 
 
 
K4XS
 
 
In a message dated 3/10/2015 1:45:40 P.M. Coordinated Universal Time,  
cx6vm.jorge at gmail.com writes:

There´s  a great difference from K6TU terrain files and files you can made
from  Google Earth :-)

At least to my  location

73,
Jorge


-----Mensaje original-----
De:  TowerTalk [mailto:towertalk-bounces at contesting.com] En nombre de Pete
Smith  N4ZR
Enviado el: lunes, 09 de marzo de 2015 12:56 p.m.
Para:  towertalk at contesting.com
Asunto: Re: [TowerTalk] [Bulk] 80 mts four square  or yagi?

A lot depends on what angles you need, from where you  are.  HFTA's Figure 
of
Merit can be useful here. K6TU.net now offers  free online terrain profiling
for both US and non-US locations, the latter  using SRTM data.

73, Pete N4ZR
Check out the Reverse Beacon Network  at
http://reversebeacon.net,
blog at reversebeacon.blogspot.com.
For  spots, please go to your favorite
ARC V6 or VE7CC DX cluster  node.

On 3/8/2015 5:39 PM, Grant Saviers wrote:
> Any comparison  has to be gain vs elevation angle.  In my modeling 80m 
> yagis  & dipoles don't have sufficient low angle gain until they are up 
>  about 150'.
>
> A 2L 80m yagi at 150' models its gain peak as  about 12dbi at 25deg and 
> 3dbi at 5deg elevation.
>
> A  4sq over salt water yields about 9dbi from horizon to 25deg 
>  elevation.  Obviously, best case, so modeling is needed for every  
> design of radials and ground properties.
>
> Both are a  significant investment so should be carefully modeled.
>
> Grant  KZ1W
>
>
> On 3/8/2015 10:06 AM, Jorge Diez CX6VM  wrote:
>> Hello
>>
>> Wish someone have some  analysis or field test to compare a 4SQ with 
>> sixty 1/4 WL radials  each vertical and a 3 element wire yagi with 
>> boom at  115ft
>>
>> Which one have more  GAIN?
>>
>> Thanks
>> Jorge
>>  CX6VM/CW5W
>>
>> Enviado desde mi iPhone
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