Date: Sat, 25 Nov 2017 16:00:21 -0330 (NST)
From: jcraig@mun.ca
To: rsgb_lf_group@blacksheep.org
In-Reply-To: <5A19B748.6050109@posteo.de>
Message-ID: <Pine.LNX.4.64.1711251559080.11649@plato.ucs.mun.ca>
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 <Pine.LNX.4.64.1711251323100.11301@plato.ucs.mun.ca> <5A19B748.6050109@posteo.de>
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Subject: Re: VLF: Unfamiliar carrier on 8270.007
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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? O=
r is=20
> 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,
>>=20
>> I've scrolled through Paul's spectrograms many times.  Quite amazing
>> reception isn't it?
>>=20
>> 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 th=
e
>> mains in the morning.  SL was restarted last night.
>>=20
>> 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.
>>=20
>> It seems EbNaut must be continue to be keyed by the Raspi and SL phase=
=20
>> stabilisated EbNaut will have to wait till the NMEA can be invoked.
>>=20
>> I'll put the feedback  E antenna back on now and keep the carrier going
>> for a few days.
>>=20
>> Here's an SL pic if you and Stefan would like to diagnose the
>> NMEA ailment: http://www.ucs.mun.ca/~jcraig/vlfsl251117.jpg
>>=20
>> 73
>> Joe
>>=20
>>=20
>> On Sat, 25 Nov 2017, Markus Vester wrote:
>>=20
>>> Hi Joe,
>>>=20
>>>=20
>>> browsing back through Paul's spectrograms, traces on 8270.0075 Hz have=
=20
>>> been visible in Todmorden more or less every morning between Nov 13 and=
=20
>>> 24, with most steady SNR on Nov 19, and none on Nov 21.
>>>=20
>>> Since Nov 11th, 21 uHz data from the DL0AO cardioid have been recorded=
=20
>>> without interruption. In an attempt to bring out your carrier, I have=
=20
>>> tried to stack several mornings in different combinations, both coheren=
tly=20
>>> and incoherently. But results have been inconclusive and don't seem to=
=20
>>> match Paul's receptions. So far, only a small peak appeared after addin=
g=20
>>> 11th and 12th with opposite phase, which does not seem right.
>>>=20
>>>=20
>>> Now it might help to have a small list of all your recent transmissions=
,=20
>>> telling us during which nights the carrier has been on air, and whether=
=20
>>> E-field pickup was used to stabilize the phase, or else when the absolu=
te=20
>>> phase might have changed due to modifications of the antenna tuning=20
>>> circuit.
>>>=20
>>>=20
>>> Best 73,
>>> Markus (DF6NM)
>>>=20
>>>=20
>>> -----Urspr=FCngliche 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
>>>=20
>>>=20
>>> This is remarkable. Is this your first TA reception below 9 kHz on a
>>> spectrogram? The 0600ut enhancments are interesting too.
>>>=20
>>> 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.
>>>=20
>>> The carrier will continue tonight with EbNaut to follow tomorrow evenin=
g.
>>>=20
>>> TNX & 73
>>> Joe VO1NA
>>>=20
>>> On Thu, 23 Nov 2017, Paul Nicholson wrote:
>>>=20
>>> Yes, look at this from a few days ago,
>>> http://abelian.org/vlf/fbins.shtml#p=3D1511204400&b=3D100&s=3Dsp
>>> http://abelian.org/vlf/fbins.shtml#p=3D1511118000&b=3D100&s=3Dsp
>>>=20
>>> 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.
>>>=20
>>> 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.
>>>=20
>>> ...
>>> --=20
>>> Paul Nicholson
>>> --
>
>
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