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Re: Topband: circular polarization on 160m

To: <>
Subject: Re: Topband: circular polarization on 160m
Date: Wed, 12 Feb 2014 12:41:24 +0100
List-post: <">>

hi Guys, 

interesting discussion 

If want, hear this file,

this is E74AW and OZ1LXJ recording of ZL3IX, at same time, John was
so kind and sinchronise those two audio recordings together in one file,

will hear how QSB is different on different station, when peak is on
my side, deep gos to John and VV 

thanks, 73 cul dado E74AW 

06.02.2014 06:21, James Wolf је написао: 

> Jose,
> I am only
presenting the possibility that if the ionosphere (where 160
propagation happens) isn't uniformly smooth and instead consists of
> wrinkles and tilts" that in a *dynamic ionosphere*, this could
be at least
> one reason we are experiencing slow fades.
> Elliptical
polarization, assuming that it is ever changing, could provide
> yet
another degree of selective fading. 
> I'm don't think I *totally*
understand why KL7AJ says that "at HF the
> ionosphere forbids the
propagation of linearly polarized signals". If at
> the magnetic
equator, and signals were East to West to equal the earth
> magnetic
tilt of the signals, it seems that at an instance in time that a
linear polarized signal could happen. But that may be nit picking. 
Jim - KR9U
> From: JC N4IS [] 
> Sent:
Wednesday, February 05, 2014 10:45 PM
> To:; 'Tom
> Subject: RE:
Topband: circular polarization on 160m
> James
> You brought a
good article about HF propagation, however the behavor on 160m
> is
different from HF. If you check on the KL7A arcticle figure 1 what is
happening between 1 and 2 MHz you can see that the green and red does
> behaivor the same way as above 2 MHz. 
> This subject is more
complex because there us no shirt answer, actualy
> between 1 and 2 MHz.
the ionosphere does not support linear polariration
> wave. The wave are
actualy eliptical and not circular for most directions.
> You can
check the long answer on the "must read book" from NM7M . R Brown
> 'The
Big Gun's Guied to Low Band Propagation" . Magneto-iomic Theory pag 47
to 56 ; and Power coupling pag 57. 
> Thanks to Karl. K9LA, the book
is available on his also must read site on
> the 160m link
> [1]
> Regards
> JC
> N4IS
> Topband Reflector Archives - [2]

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