Message-ID: <016c01ca9882$110b8ae0$0201a8c0@Clemens04>
From: "Clemens Paul" <cpaul@gmx.net>
To: <rsgb_lf_group@blacksheep.org>
References: <002601ca9605$11be0870$0401a8c0@xphd97xgq27nyf> <9afca2641001150919g4adfc9e3g7eb7672cffaf6081@mail.gmail.com> <005401ca960a$76d684d0$0401a8c0@xphd97xgq27nyf> <DCE4CFF1590A4499A52A730D31E4213B@JimPC> <002801ca9786$7c58b2c0$0401a8c0@xphd97xgq27nyf> <17BA74D16712478BA7BE98EEE32AB402@AGB> <000901ca978d$2edb0910$0401a8c0@xphd97xgq27nyf> <008501ca9795$472db6e0$0201a8c0@Clemens04> <BA47CF3D4C6444A2B7B30F0D2325A2F6@AGB> <009c01ca97a5$7ad44490$0201a8c0@Clemens04> <8F68856579324DFBBDEE947B86E8036D@AGB>
Date: Mon, 18 Jan 2010 22:05:39 +0100
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Subject: Re: LF: Dirty carrier
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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 le=
ss
than +/-50Hz on the screenshot.
I've also looked with wider spreads,but no 50Hz or 100Hz harmonics wer=
e visible.


73
Clemens
DL4RAJ

----- Original Message -----=20
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 ca=
used
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 -----=20
> 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 on=
ly
> 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 -----=20
>> 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  , 503.90=
0
>>>> 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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>
>




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