[TowerTalk] Yagi gain vs rotary dipole.

[Steve Hunt]

Peter,

The method is not "wrong" - it's just "difficult"!

The results will *not* always be the same, because the two antennas were 
spatially separated and the incoming sky-wave signal had time-varying 
spatial amplitude and polarisation variations. So it's quite possible 
for the dipole to be "favoured" over the hexbeam at some particular 
point in time.

However, averaged across a large number of measurements you would expect 
these variations to "average out" and the real gain to become apparent. 
That's exactly what you see in the distribution:
http://www.karinya.net/g3txq/temp/hex_gain.png


Steve G3TXQ


On 25/11/2014 01:21, Peter Voelpel wrote:
> Hi Steve,
>
> You probably measured arriving signals with qsb so you just proved your
> method being wrong, otherwise the result would be always the same.
> You need to measure and compare the major lobes just outside the near field
> to compare antennas.
>
> 73
> Peter
>
>
>