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Date: Sun, 26 Nov 2017 13:42:16 +0100
From: DK7FC <selberdenken@posteo.de>
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References: <15ff36930cb-1d4f-d42c@webjas-vad143.srv.aolmail.net> <Pine.LNX.4.64.1711251323100.11301@plato.ucs.mun.ca> <5A19B748.6050109@posteo.de> <Pine.LNX.4.64.1711251559080.11649@plato.ucs.mun.ca>
In-Reply-To: <Pine.LNX.4.64.1711251559080.11649@plato.ucs.mun.ca>
Subject: Re: VLF: Unfamiliar carrier on 8270.007
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Hello Joe,

your signal has been clearly stronger last night on Pauls grabber. On my 
47 uHz spectrogram there is a short trace on the right frequency. Could 
this be yours?
Unfortunately the tree will shut down soon, so i can't monitor you the 
next night.
But that peak makes hope!
73, Stefan

Am 25.11.2017 20:30, schrieb jcraig@mun.ca:
> That's better!  Thanks Stefan!
>
> On Sat, 25 Nov 2017, DK7FC wrote:
>
>> Hello Joe,
>>
>> It looks like the NMEA level is to low. Did you select PPS+NMEA at 
>> all? Or is it still set to PPS without NMEA? You know what i mean?
>>
>> 73, Stefan
>>
>> Am 25.11.2017 18:56, schrieb jcraig@mun.ca:
>>> Hi Markus,
>>>
>>> I've scrolled through Paul's spectrograms many times.  Quite amazing
>>> reception isn't it?
>>>
>>> Sorry I don't have much more info on the TX.  It has been on with 
>>> little
>>> down time for the past month except yesterday when the elect. co. 
>>> cut the
>>> mains in the morning.  SL was restarted last night.
>>>
>>> Today I used Paul's UBX library to reduce the neo7 pps from 100 to 
>>> 10 ms
>>> so SL can use the NMEA but sadly this no longer works and so the 
>>> notepad
>>> can't be synchronised; it will not connect to the inet.
>>>
>>> It seems EbNaut must be continue to be keyed by the Raspi and SL 
>>> phase stabilisated EbNaut will have to wait till the NMEA can be 
>>> invoked.
>>>
>>> I'll put the feedback  E antenna back on now and keep the carrier going
>>> for a few days.
>>>
>>> Here's an SL pic if you and Stefan would like to diagnose the
>>> NMEA ailment: http://www.ucs.mun.ca/~jcraig/vlfsl251117.jpg
>>>
>>> 73
>>> Joe
>>>
>>>
>>> On Sat, 25 Nov 2017, Markus Vester wrote:
>>>
>>>> Hi Joe,
>>>>
>>>>
>>>> browsing back through Paul's spectrograms, traces on 8270.0075 Hz 
>>>> have been visible in Todmorden more or less every morning between 
>>>> Nov 13 and 24, with most steady SNR on Nov 19, and none on Nov 21.
>>>>
>>>> Since Nov 11th, 21 uHz data from the DL0AO cardioid have been 
>>>> recorded without interruption. In an attempt to bring out your 
>>>> carrier, I have tried to stack several mornings in different 
>>>> combinations, both coherently and incoherently. But results have 
>>>> been inconclusive and don't seem to match Paul's receptions. So 
>>>> far, only a small peak appeared after adding 11th and 12th with 
>>>> opposite phase, which does not seem right.
>>>>
>>>>
>>>> Now it might help to have a small list of all your recent 
>>>> transmissions, telling us during which nights the carrier has been 
>>>> on air, and whether E-field pickup was used to stabilize the phase, 
>>>> or else when the absolute phase might have changed due to 
>>>> modifications of the antenna tuning circuit.
>>>>
>>>>
>>>> Best 73,
>>>> Markus (DF6NM)
>>>>
>>>>
>>>> -----Ursprüngliche Mitteilung-----
>>>> Von: jcraig <jcraig@mun.ca>
>>>> An: rsgb_lf_group <rsgb_lf_group@blacksheep.org>
>>>> Verschickt: Fr, 24. Nov 2017 15:08
>>>> Betreff: Re: AW: VLF: Unfamiliar carrier on 8270.007
>>>>
>>>>
>>>> This is remarkable. Is this your first TA reception below 9 kHz on a
>>>> spectrogram? The 0600ut enhancments are interesting too.
>>>>
>>>> I've only managed to detect the sigs at 7 km and perhaps at 20 km (on
>>>> Signal Hill) using an E-probe and a notepad. 3500km is astounding
>>>> and a sure sign that work is needed on my RX methods.
>>>>
>>>> The carrier will continue tonight with EbNaut to follow tomorrow 
>>>> evening.
>>>>
>>>> TNX & 73
>>>> Joe VO1NA
>>>>
>>>> On Thu, 23 Nov 2017, Paul Nicholson wrote:
>>>>
>>>> Yes, look at this from a few days ago,
>>>> http://abelian.org/vlf/fbins.shtml#p=1511204400&b=100&s=sp
>>>> http://abelian.org/vlf/fbins.shtml#p=1511118000&b=100&s=sp
>>>>
>>>> and more if you scroll back a day at a time. Note how quite
>>>> frequently the signals comes up very strong at about 06:00
>>>> for half hour or so.
>>>>
>>>> If you scroll back to the 10th there's Stefan on 8270.005
>>>> but no more sign of your signal. For some reason it's
>>>> started showing up in the spectrogram since about the 13th.
>>>>
>>>> ...
>>>> -- 
>>>> Paul Nicholson
>>>> -- 
>>
>>