Message-Id: <507E6B0A020000FA000166C1@gw1.sron.nl>
Date: Wed, 17 Oct 2012 08:23:38 +0200
From: "Victor van Kooten" <V.A.G.van.Kooten@sron.nl>
To: <rsgb_lf_group@blacksheep.org>
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Subject: Re: LF: WSPR on LF
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hello Markus,all

same kind of problem here with the wspr software.I switched my rx to cw
with a narrow filter and 750HZ BFO offset.Decodes perfectly but no
uploads to the database,allthough I could see my call on the map as an
active rx station.no error message.
probably a bug in the program?

73

victor
PA3FNY



>>> "Markus Vester" <markusvester@aol.com> 16/10/2012 23:59 >>>
> where are you? :-)
... 20 Hz above you ;-)

Yesterday I finally got WSPR 2.11 working in IQ-mode with the FiFi-SDR
on MF. Today I changed back to LF (which is 0.1355 MHz dial and 2000 Hz
BFO here) and got fine decodes, but no uploads, with a persistant error
message "frequency changed no upload of spots". Tried all sorts of
different settings (which is time consuming) but didn't succeed - anyone
out there who has seen and solved this? Now back to WSPR 2.0 with same
parameters, running just fine.

Yesterday one neighbour had a nearby large pine tree chopped off, and
now I find my antenna current boosted from 3.4 to 4.1 amps!=20

Frequent DF6NM grabber watchers are probably familiar with a QRM line
which appeared on 136.9 kHz same hours each day. A portable RX pointed
towards a source in one other neighbour's house, and last weekend I
finally found the courage to knock on their door. When I mentioned the
regular on and off times, my neighbour identified the flourescent lights
of her fish tank! She allowed me to fix it, and I found a chopper based
on a "smart controller" chip (Infineon ICB1FL02G), running at 45.6 kHz
fundamental. Changing a frequency-setting resistor to push the beast to
41.5 kHz, plus retrofitting a three-wire cable and plug, cleared this
one for good.

Best 73,
Markus (DF6NM)


From: Stefan Sch=C3=A4fer=20
Sent: Tuesday, October 16, 2012 7:46 PM
To: rsgb_lf_group@blacksheep.org=20
Subject: Re: LF: WSPR on LF


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

assume.

Markus, Albert, Roland, Roger, Eddie, where are you? :-)


73, Stefan/DK7FC


Am 16.10.2012 19:37, schrieb Stefan Sch=C3=A4fer:
> 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

> 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

> 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
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=20
>>> 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
>>>
>>>