Re: LF: Dirty carrier

["Clemens Paul" <cpaul@gmx.net>]

Graham,

thanks for the link to the capture.
Looks strange indeed,cat whisker-like (again :-) ).
Seems the carrier I've seen is a different one.

> you  where  looking at  1 or  2  Hz spectrum width ?
No,according to the frequency scale (numbers are a bit small) a bit less
than +/-50Hz on the screenshot.
I've also looked with wider spreads,but no 50Hz or 100Hz harmonics were visible.


73
Clemens
DL4RAJ

----- Original Message ----- 
From: "Graham" <g8fzk@g8fzk.fsnet.co.uk>
To: <rsgb_lf_group@blacksheep.org>
Sent: Monday, January 18, 2010 9:50 PM
Subject: Re: LF: Dirty carrier


Ok Clemens,

Mal was looking at  900  Hz spread with  100  Hz separation  .. from you
post, you  where  looking at  1 or  2  Hz spectrum width ?
nothing  like that  shows at  Liverpool  .. only  a  random pattern caused
by the  modulation , Gary  captured this  pattern a  while  ago  >
http://uk500khz.googlegroups.com/web/504%20off%201353z%2020090720.jpg

G ..

--------------------------------------------------
From: "Clemens Paul" <cpaul@gmx.net>
Sent: Sunday, January 17, 2010 6:46 PM
To: <rsgb_lf_group@blacksheep.org>
Subject: Re: LF: Dirty carrier

> Graham,
>
> the rx was tuned to 504*k*Hz as you can see on the screenshot.
> The RBW or better bin resolution was 0,12Hz.
> I'm not sure what you mean by "mHz": MilliHertz or Megahertz?
> Or do I miss your point?
>
> 73
> Clemens
> DL4RAJ
>
>
> ----- Original Message ----- 
> From: "Graham" <g8fzk@g8fzk.fsnet.co.uk>
> To: <rsgb_lf_group@blacksheep.org>
> Sent: Sunday, January 17, 2010 6:12 PM
> Subject: Re: LF: Dirty carrier
>
>
> ?
> Clemens
>
> I think Mal is  referring to   Hz  and  not  mHz ? ..  the  tx is only
> across  the  Irish  sea  from Liverpool and shows +30 db over the  noise
> on
> spec-lab .. sometimes  I can  listen to the audio .. :(   ..
>
> G ..
>
> --------------------------------------------------
> From: "Clemens Paul" <cpaul@gmx.net>
> Sent: Sunday, January 17, 2010 4:51 PM
> To: <rsgb_lf_group@blacksheep.org>
> Subject: Re: LF: Dirty carrier
>
> > That's how the "504kHz-carrier" looks like here on Perseus.
> > Actually two carriers,one a bit lees than 1Hz below and another,
> > a bit more than 3Hz below.
> >
> >
> > 73
> > Clemens
> > DL4RAJ
> >
> > ----- Original Message ----- 
> > From: "mal hamilton" <g3kevmal@talktalk.net>
> > To: <rsgb_lf_group@blacksheep.org>
> > Sent: Sunday, January 17, 2010 4:53 PM
> > Subject: Re: LF: Dirty carrier
> >
> >
> > > The sidebands spread 900 hz spaced each side of the carrier at 100 hz
> > > intervals.The dirt has now gone, fault rectified.
> > > g3kev
> > >
> > > ----- Original Message -----
> > > From: "Graham" <g8fzk@g8fzk.fsnet.co.uk>
> > > To: <rsgb_lf_group@blacksheep.org>
> > > Sent: Sunday, January 17, 2010 3:44 PM
> > > Subject: Re: LF: Dirty carrier
> > >
> > >
> > > > Carrier  is  30  db over the  noise floor at Liverpool , no hum lines
> > > > showing,
> > > > only  modulation  spread , nothing  showing at  Birmingham either
> > > > > http://www.wireless.org.uk/grab/
> > > >
> > > > If it  was  100 Hz hum , then the  side bands  would be  , 503.900
> > > > and
> > > > 504.100 ..  that was the  reason for  picking  502.4 as the  wspr
> > > frequency
> > > > to  make use of the  100  Hz window under 504 ..
> > > >
> > > > G ..
> > > >
> > > > --------------------------------------------------
> > > > From: "mal hamilton" <g3kevmal@talktalk.net>
> > > > Sent: Sunday, January 17, 2010 3:05 PM
> > > > To: <rsgb_lf_group@blacksheep.org>
> > > > Subject: Re: LF: Dirty carrier
> > > >
> > > > >
> > > > > I think it is a problem with RTE 2nd harmonic 100 hz hum on the
> > > > > carrier
> > > > > 503.4 K/cs
> > > > > de mal/g3kev
> > > > >
> > > > > ----- Original Message -----
> > > > > From: "James Moritz" <james.moritz@btopenworld.com>
> > > > > To: <rsgb_lf_group@blacksheep.org>
> > > > > Sent: Friday, January 15, 2010 5:50 PM
> > > > > Subject: Re: LF: Dirty carrier
> > > > >
> > > > >
> > > > >> Dear Mal, LF Group,
> > > > >>
> > > > >> Nothing unusual visible/audible here...
> > > > >>
> > > > >> Cheers, Jim Moritz
> > > > >> 73 de M0BMU
> > > > >>
> > > > >>
> > > > >
> > > > >
> > > > >
> >
> > --------------------------------------------------------------------------------
> >
> >
> >
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>
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