[Hi-zreceivingarraydiscussions] Grounds for 4 square

[pflorig at windstream.net]

Hi agn,
Just for reference I also used the 259 to try and check at 80 and 160.
80mtrs 3.5mhz 45-60 ohms x=414 swr>25
160mtrs 1.8mhz >650ohms x>650 swr>25
Took these readings before the other measurements I posted.
Tomorrow I will try some other measurements and see what shows up on 10mhz.
Little cold, rainy and dark now. Coyotes come out now so little careful.
73 Phil
On Saturday, December 17, 2016 1:17 PM, Lee STRAHAN <k7tjr at msn.com> wrote: 
> Gm Dan, 
>  Well you are correct the conductivity changes. We are at the mercy of trying to 
> find a way to have a go or no go test for the Hi-Z type elements. Most owners 
> only have access to something like an MFJ259 to measure the elements. Those 
> simple impedance bridges do not do well with high impedances like the shortened 
> verticals off resonance. However the resistive component may give a better 
> portion of the conductivity? 
> For those looking for more data on conductivity here is an N6LF page on that. 
> "http://www.antennasbyn6lf.com/files/ground_skin_depth_and_wavelength.pdf" 
>   The conductivity is actually about 2 to 1 difference from 2 to 10 MHz with the 
> higher conductivity at the 10 MHz end 
> So until we find a better way to measure we may have to improvise. 
>   The N2PK VNA has a RFIV bridge that does very well with the higher impedances, 
> It would be very interesting to compare the results from two methods. 
>  Any other suggestions out there? 
> I can't make any test here right now with 15 inches of snow on the flat. 
>  
>   Lee  K7TJR 
>  
> >> 
> while element to element comparisons might be useful, isn't ground conductivity 
> vastly different at 1.8 Mhz than at 10 Mhz ?? 
> or, am I delusional, again?  ha ha ha 
> 73, w5xz 
>  
>  
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