[Elecraft] KPA500 troubles

[Eric Swartz - WA6HHQ, Elecraft]

Probably best to change the topic of this, as it has drifted into a different area.

Eric
/elecraft.com/

On 11/13/2015 9:01 PM, Jim Brown wrote:
> On Fri,11/13/2015 1:30 PM, Wes (N7WS) wrote:
>> Note, there is no mention of any directivity, or lack thereof, so I would 
>> take it that this is a theoretical free-space value.
>
> One could do that, of course, but your original post brought ground 
> conductivity into the computation, which is, IMO, entirely appropriate.
>
> FWIW, I've done some extensive modeling studies of horizontal and vertical 
> antennas at various mounting heights; horizontal antennas don't care much 
> about soil but care a lot about height; vertical antennas care a bit about 
> height and a lot about soil. That work is on my website.
>
> I think I would use average gain of the antenna as installed as the basis for 
> compliance with the Rules, but the question remains, what height for the 
> dipole? :)
>
> This is, for me, purely academic. My soil being terrible, a vertical is a poor 
> choice for 60M, and I have a bunch of high horizontal dipoles, so I'd use one 
> of them. :)
>
> BTW -- there's a 2-part piece on this topic by Rudy Severns in QEX this past 
> summer, specifically addressing very short verticals for the 630m band.
>
> 73, Jim K9YC
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