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Date: Tue, 16 Oct 2012 15:20:29 +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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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 is 
still to optimistic i think. We really have to start in something like 
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 program is 
much more complex but it offers some essential features! The band 
limiting and noise blanking will reduce the QRN very significantly! The 
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 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 to 
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


Am 16.10.2012 15:03, schrieb George Szymanski:
> Hi Stefan,
>
> As you say we need DCF39 back again!
> I have only seen a couple of short transmissions from JA7NI.
> No other ham signals seen from JA or UA0 so far.
> I think the LF season here is still early anyway.
>
> What's the best Argo setting to detect your WSPR signal?
> I just have it set on QRSS3 for the time being, maybe slower would be
> better.
>
> I sometimes listen to 198kHz to see if I can see the BBC. There is
> something there but I cannot ID it positively.
>
> 73 de George
>
> On Tue, 16 Oct 2012 14:49:58 +0200, you wrote:
>
>    
>> Hello George,
>>
>> Thank you.
>>
>> Please tell me, did you get more experience about the best transmit
>> times from EU to your location? Is JA7NI still transmitting for you or
>> was it just a short test?
>>
>> I tried some time to appear on your grabber but there was no success so
>> far. Maybe there was QRN or the times were not optimal.
>>
>> Do you have any suggestions?
>>
>> It's hard to evaluate this path without having a DCF-39 plot (knowing
>> the NBW) or some first traces from here. BTW, it seems the EU-autumn
>> season to VK is over now. But you are "just" in 2/3 of the distance and
>> even in the northern hemisphere, so things may become a bit better..
>>
>> 73, Stefan
>>
>>      
>