[TowerTalk] 80 mts four square or yagi?

[Bill via TowerTalk]

HFTA may have issues.  However, 139/69 stack is not close  spaced.  It is 
approximately one wavelength.
 
I am a firm believer in BV's HFTA and have used it to design both  of my 
last two stations.  And, if the sale of my house goes through, I'll  use it on 
my next place.
 
K4XS
 
 
In a message dated 3/10/2015 1:11:49 A.M. Coordinated Universal Time,  
w0mu at w0mu.com writes:

What  values did you get using HFTA.  HFTA has some issues with very 
close  spaced stacks.  The numbers are wrong.

Mike W0MU

On  3/9/2015 7:09 PM, Jorge Diez - CX6VM wrote:
> Thanks Jim
>
>  Sorry for the delay, just returning from along trip after ARRLDX  SSB
>
> Is curious HFTA. It stopped my project for a two stack for  20 mts yagís.
> Since many contesters told me to put it at 69/139 ft,  HFTA told me that 
this
> is not the best distances.
>
> OK  about your document, will read it, but here we don´t have such  
facilities
> than in USA to know ho´w the ground conductivity, the  terrain data, etc, 
etc
>
> 73,
>  Jorge
>
>