[Elecraft] Diversity at 50 MHz

[Alan Bloom]

As I recall, signals at VHF/UHF tend to become horizontally polarized
after propagating long distances, no matter what the polarization of the
transmit antenna.  That's why horizontal polarization is traditionally
used for SSB/CW (DX-oriented communications) and vertical for FM (mostly
local communications).

Al N1AL

On Sun, 2007-12-30 at 15:33, Mike Scott wrote:
> I am building a 3-element 6-meter quad while waiting for my 2nd batch K3.
> Before final build a new thought...
> 
> Instead of building a quad I could alternatively make the spreader arms a
> little longer and configure two cross-polarized 3-element yagis. The thought
> would be to drive two receivers in polarization diversity.
> 
> Does anyone have any experince with the value of polarization diversity at
> 50 MHz? I am inexperienced on this band. I know everyone goes horizontal
> polarization for VHF weak signal work but once the signal gets refracted
> back to ground level the actual polarization may be rotated.
> 
> BTW, Lyle have you thought about ways to optimumly combine diversity
> receiver outputs other than just piping them into seperate ears? I could
> imagine actually calculating a time averaged received polarization angle and
> differential delay between channels and then combining...
> 
> 
> Mike Scott-AE6WA
> Tarzana, CA (DM04/near LA)
> QRP-ARCI #12326/ KX1 #1311/ Swan 350C
> 
> 
> 
> 
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