[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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