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Date: Tue, 16 Oct 2012 19:46:55 +0200
From: =?ISO-8859-1?Q?Stefan_Sch=E4fer?= <Stefan.Schaefer@iup.uni-heidelberg.de>
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Subject: Re: LF: WSPR on LF
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Oh yes, let us all make a MEGA activity on LF tonite, just like the last=20
weekend on MF. That was really fine and impressing for all involved, i=20
assume.

Markus, Albert, Roland, Roger, Eddie, where are you? :-)


73, Stefan/DK7FC


Am 16.10.2012 19:37, schrieb Stefan Sch=E4fer:
> LF,
>
> Does someone join in on LF WSPR? There are many active RX stations!=20
> Eddie/G3ZJO, what about you? Your results have been good on MF. On LF=20
> the ERP will be 10 dB lower (ish) if the TX pwr is the same but i=20
> expect that you will have quite good chances in the groundwave range.
>
> There is a very high LF/MF and digimode appliance operator density in=20
> the UK ;-) Also in Germany and the Netherlands and France. It looks=20
> like we (these countries) make the highest density of active LF/MF=20
> amateurs in the world, except Tokyo city of course :-)
>
> 73, Stefan/DK7FC
>
>
> Am 16.10.2012 15:48, schrieb George Szymanski:
>> You never know Stefan I might get a weak trace from you overnight!
>>
>> I'm too stupid to use Spec lab!
>> I will try the Twente receiver but my internet is so very slow it
>> might not work well enough.
>>
>> 73 de George, DU1GM
>>
>>
>> On Tue, 16 Oct 2012 15:20:29 +0200, you wrote:
>>
>>> Hi George,
>>>
>>> There is no chance for you to display normal WSPR from me over that
>>> distance in a spectrogram. Maybe you could display WSPR-32 but this i=
s
>>> still to optimistic i think. We really have to start in something lik=
e
>>> QRSS-120 or DFCW-180 and then see what comes out.
>>>
>>> I have no idea how to set Argo for optimal displaying DFCW-180 since =
i
>>> don't use the new version of the program. Furthermore i am very
>>> convinced by using Spectrum Lab for LF/MF detection. Yes, the=20
>>> program is
>>> much more complex but it offers some essential features! The band
>>> limiting and noise blanking will reduce the QRN very significantly! T=
he
>>> improvement can vary from a few to 10 dB, depending on the kind of
>>> noise.  I will try to generate a new spectrogram soon, showing this=20
>>> effect.
>>> I don't know if Argo allows noise cancelling. But if you loose say 6 =
dB
>>> SNR, that makes a difference from invisible to O copy.
>>>
>>> Did you try the Twente WEB SDR link i sent you? This is also useful t=
o
>>> check if the reference signal you're using is available at present. I=
'm
>>> daily listening to AM BCD stns for many hours a day :-)
>>>
>>> As said, if you like i can give you some advice how to run a DCF-plot.
>>>
>>> 73, Stefan/DK7FC
>>>
>>>