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Date: Sat, 25 Nov 2017 19:32:40 +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>
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Subject: Re: VLF: Unfamiliar carrier on 8270.007
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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
>> --