[Elecraft] Off Topic -- Yagi Antenna SWR measurement ?

[Jack Smith]

You might get a somewhat more representative SWR value if the yagi is 
vertically mounted so that the reflector is closest to ground and the 
director at the top.

The idea is that the reflector will partially decouple the close in 
ground surface from the antenna.  I've done this with VHF and UHF 
antennas and found it works well, but at HF while it's better than 
making a measurement with the antenna parallel to the ground but I would 
expect noticeable changes when it is mounted atop the tower.

Jack K8ZOA

On 7/12/2013 10:50 AM, Phil Hystad wrote:
> I know this is OT but there are so many knowledgable people on this reflector
> that I can't pass it up.
>
> A friend has a Yagi antenna (HF tri-bander) that he wants to measure the SWR
> before he raises the antenna up on the tower.
>
> Question:  is this accurate or does the proximity of ground (maybe two feet high)
> so strongly affect the SWR reading that the measurement is not accurate.
>
> 73, phil, K7PEH
>
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Elecraft at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>