Message-ID: <20081228162647.89ttjdv4sbkgkw0g@webmail4.kuleuven.be>
Date: Sun, 28 Dec 2008 16:26:47 +0100
From: Rik Strobbe <Rik.Strobbe@fys.kuleuven.be>
To: rsgb_lf_group@blacksheep.org
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Subject: Re: LF: 500KHz QSB
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Gary,

if the QSB comes from multiple path propagation (where one of both of  
the paths is changing) QSB can be different on different frequencies.
One could even use the QSB/frequency pattern to determine the path changes.

73, Rik  ON7YD - OR7T

Quoting Gary - G4WGT <g4wgt@tiscali.co.uk>:

> Hi LF,
>
>
>
> Just made an interesting observation regarding QSB at 508KHz.
>
>
>
> For my own benefit I have started running a slow SpecLab showing 500 to
> 510KHz & capturing for evaluation.
>
>
>
> Occasionally the NDB "Z" shows up. The strange thing is that even though the
> carrier on 508KHz & the two ID offsets at 509 & 507KHz are relatively close
> they each display at different depth of fading or an out of phase fade
> pattern.
>
>
>
> I am unsure why this should be, any comments please, see capture at link :-
>
>
>
> http://myweb.tiscali.co.uk/wgtaylor/ZNDB.jpg
>
>
>
> 73,
>
>
>
> Gary - G4WGT - IO83QP.
>
>
>
>



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