Topband: circular polarization on 160m

[Tom W8JI]

Here are some pictures and a sound file or two...

http://www.w8ji.com/HF%20circular%20polarization.htm

----- Original Message ----- 
From: <dado at prijedor.com>
To: <topband at contesting.com>
Sent: Wednesday, February 12, 2014 6:41 AM
Subject: Re: Topband: circular polarization on 160m


>
>
> hi Guys,
>
> interesting discussion
>
> If want, hear this file,
> https://drive.google.com/file/d/0B8I6Nck0GwTdYTI0MzVkY2QtYjUyYS00YmE3LTk4NTktNWVlNzE2ZGFiYmE1/edit?usp=sharing
>
>
> 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
>
> Дана
> 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
> "warps,
>> 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 [mailto:n4is at comcast.net]
>> Sent:
> Wednesday, February 05, 2014 10:45 PM
>> To: jbwolf at comcast.net; 'Tom
> W8JI'; herbs at vitelcom.net;
>> topband at contesting.com
>> 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
> not
>> 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
>>
>>
> http://k9la.us/html/160m.html [1]
>>
>> Regards
>>
>> JC
>>
>> N4IS
>>
>>
> _________________
>> Topband Reflector Archives -
> http://www.contesting.com/_topband [2]
>
>
> Links:
> ------
> [1]
> http://k9la.us/html/160m.html
> [2] http://www.contesting.com/_topband
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