Date: Sat, 7 Oct 2017 16:26:25 -0230 (NDT)
From: jcraig@mun.ca
To: rsgb_lf_group@blacksheep.org
In-Reply-To: <004001d33f90$033f58c0$09be0a40$@comcast.net>
Message-ID: <Pine.LNX.4.64.1710071619100.1544@plato.ucs.mun.ca>
References: <d4435cf7-7279-4804-4983-7c32916555b4@abelian.org>
 <15ef65e747f-c05-19293@webjas-vac135.srv.aolmail.net>
 <Pine.LNX.4.64.1710071346210.1307@plato.ucs.mun.ca>
 <004001d33f90$033f58c0$09be0a40$@comcast.net>
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Subject: RE: LF: VO1NA in Todmorden on 8270 Hz
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Hi Jim,

This looks like a sin(x)/x curve centred and peaked (y=3D0.1) at t=3D0
and 0 crossings at t=3D +- 60 uS;  sd=3D300 nS.

Thanks & 73
Joe

On Sat, 7 Oct 2017, hvanesce@comcast.net wrote:

> Joe,
>
> Did you try the "[0] Interpolated PPS signal" option?
> ("Sampling Rate Detector" window, "Scope Option" drop-down menu)
>
> 73,
>
> Jim AA5BW
>
>
> -----Original Message-----
> From: owner-rsgb_lf_group@blacksheep.org
> [mailto:owner-rsgb_lf_group@blacksheep.org] On Behalf Of jcraig@mun.ca
> Sent: Saturday, October 7, 2017 12:44 PM
> To: rsgb_lf_group@blacksheep.org
> Subject: Re: LF: VO1NA in Todmorden on 8270 Hz
>
> Paul Markus and Group,
>
> Thanks Paul for the reports.  The radiation gives more gratification than
> the efforts to get a stable carrier.
>
> On Sat, 7 Oct 2017, Markus Vester wrote:
>
>> Great result!
>
> Truly astounding that Paul can receive 10 uW at 3600km with 10+ dB S/N.
>
>> Hmm I thought that VO1NA had been on 477 kHz during those nights. Joe ar=
e
> you transmitting MF and VLF simultaneously, on two antennas?
>
> Yes, the high wire for 630m (~5 W EIRP) and the low for 36000m.
>
>> Do you already have GPS lock available on 8.27 kHz?
>
> Yes, pps and NMEA to SpecLab but evidently no discipline yet. The pps pul=
se
> looks strange on the SL scope and there are 'PPS zero-crossing too flat'
> debug errors on SL SR correction.  This is all the NEO7M seems willing to
> provide at the moment;  connecting the raspi3 to the tiny USB pins on the
> NEO7M was fun, but otherwise unproductive.  I'm hoping it's possible to s=
end
> commands directly to the neo7m via usb without a special chip.
>
> RSNTP is running on the SL pc.
>
> 73
> Joe
>
>>
>> 73, Markus
>>
>>
>>
>> -----Urspr=C3=BCngliche Mitteilung-----
>> Von: Paul Nicholson <vlf0403@abelian.org>
>> An: rsgb_lf_group <rsgb_lf_group@blacksheep.org>
>> Verschickt: Sa, 7. Okt 2017 10:36
>> Betreff: LF: VO1NA in Todmorden on 8270 Hz
>>
>>
>>
>> VO1NA on 8270.00709 is a good nighttime signal at Todmorden recently.
>> Here are the last three night's spectra in 34.72 uHz
>> (8 hours 23:00 to 07:00 UT) using combined E-field and H-field.
>>
>> http://abelian.org/vlf/tmp/171007b.gif S/N 12.6 dB
>> http://abelian.org/vlf/tmp/171007c.gif S/N 14.5 dB
>> http://abelian.org/vlf/tmp/171007d.gif S/N 11.4 dB
>>
>> Not bad for 8uW ERP at range 3575 km and an undisciplined OCXO.
>>
>> --
>> Paul Nicholson
>> --
>
>
>
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