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" <[email protected]>
To: <[email protected]>
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" <[email protected]>
Sent: Sunday, January 17, 2010 6:46 PM
To: <[email protected]>
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" <[email protected]>
To: <[email protected]>
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" <[email protected]>
Sent: Sunday, January 17, 2010 4:51 PM
To: <[email protected]>
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" <[email protected]>
To: <[email protected]>
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" <[email protected]>
To: <[email protected]>
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" <[email protected]>
Sent: Sunday, January 17, 2010 3:05 PM
To: <[email protected]>
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" <[email protected]>
> To: <[email protected]>
> 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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