[BC] Re: The Future / Signal

Robert Meuser Robertm
Sun Dec 3 16:40:16 CST 2006


k7cr wrote:

> The discussion about which Pol is best for FM reminded me of the 
> following -
>
>> I recall after the Commish require all the Class C's
>
> to increase ERP's to 100Kw...Many station did not wish to purchase the 
> hardware to give them 100Kw in each Pol and elected to run 100 in 
> H-Pol and something less in V-Pol...I don't recall those stations 
> suffering all
> that much  compared to those with  H &V's the same.
>
>> As for long distances.   I recall,  years ago, playing with 
>
> 2 meter SSB.  I could talk from Tacoma, Wa  to Portland,
> Oregon (just over 100 miles) using H-Pol, we tried V-Pol
> with horrible results.  H-Pol was clearly superior. I have
> to think that the same applies to FM.


Very true, ground attenuation is higher for V Pole than H Pol. So 
anything that is not perfect line of sight will be impacted by the 
difference

>
>> Reflections and refractions really mess up polarity...This
>
> explains why rotating antennas can produce different results.


A car bodies are vast reflectors




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