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The original message has been attached to this so you can view it or label similar future email. If you have any questions, see @@CONTACT_ADDRESS@@ for details. Content preview: Hi Joe, you probably refer to your carrier on 8270.0075 - yes I think you're right, there are little Doppler wiggles, with higher frequency during the mornings than in the evenings. This does make sense, c [...] Content analysis details: (0.0 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at http://www.dnswl.org/, no trust [74.6.135.123 listed in list.dnswl.org] -0.0 RCVD_IN_MSPIKE_H2 RBL: Average reputation (+2) [74.6.135.123 listed in wl.mailspike.net] -0.0 SPF_PASS SPF: sender matches SPF record 0.0 FREEMAIL_FROM Sender email is commonly abused enduser mail provider (markusvester[at]aol.com) 0.0 HTML_MESSAGE BODY: HTML included in message 0.0 T_DKIM_INVALID DKIM-Signature header exists but is not valid X-Scan-Signature: 78d45eae26b8e09cb3b944588f353c28 Subject: Re: LF: VLF Carrier on 8270.01 Hz from a ground loop antenna - The 6th station on Paul's spectrogram Content-Type: multipart/alternative; boundary="----=_Part_10789890_649083380.1546166793927" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: *** X-Spam-Status: No, hits=3.5 required=5.0 tests=FORGED_MUA_MOZILLA,HTML_30_40, HTML_MESSAGE autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false ------=_Part_10789890_649083380.1546166793927 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable Hi Joe, you probably=C2=A0refer to=C2=A0your carrier on 8270.0075 - yes I think you= 're right, there are little Doppler wiggles, with higher frequency during t= he mornings than=C2=A0in the evenings. This does make sense, considering=C2= =A0day-night phase shifts observed=C2=A0in=C2=A0the=C2=A0long 13.3 hour FFT= integration time. In Paul's 1.5 uHz spectrum covering=C2=A0one week, we now see a central pea= k on the nominal frequency, assosiated by smaller AM and PM sidebands at 11= .6 uHz spacing. Would the connection=C2=A0between your guard rails be approximately oriente= d=C2=A0towards us? 73, Markus -----Urspr=C3=BCngliche Mitteilung----- Von: jcraig An: rsgb_lf_group Verschickt: So, 30. Dez 2018 2:21 Betreff: Re: LF: VLF Carrier on 8270.01 Hz from a ground loop antenna - The= 6th station on Paul's spectrogram Hi Markus, VLF, Thanks for mentioning the 8270.0027 Hz traces at DL0AO. I've been watching closely ever since. There appear to be dirunal frequency shifts on this signal (or perhaps it is my imagination). There are guard rails here that run in a straight line for about a km=20 that would make fine ground loops for VLF but getting across the pond might be challenging. 73 Jor VO1NA On Sat, 29 Dec 2018, Markus Vester wrote: > Hi Stefan, > > a similar "miracle" occured at DL0AO: The trace from your ground loop app= eared=C2=A0very strong on the NS-loop, which should have a null towards you= r transmitter. The peak was - 120 dB on EW and V, and=C2=A0-125 dB on NS, o= nly 5 dB difference. > > I believe our=C2=A0N-S receive loop is seeing only the=C2=A0skywave compo= nent. Due to the angular orientation of your=C2=A0transmit=C2=A0loop, the e= lectric field of the upward radiation will be=C2=A0polarized in the NW-SE d= irection, with the orthogonal magnetic field=C2=A0pointing NE-SW. This pola= rization will be more or less retained during the reflection (possibly=C2= =A0rotated a bit by Faraday effect). So=C2=A0the downgoing wave will also c= ontain=C2=A0a magnetic field component=C2=A0in the E-W direction, which=C2= =A0is then picked up by=C2=A0the NS-loop. > > So yes, earth loops are loops. > > Best 73, > Markus (DF6NM) > > -----Urspr=C3=BCngliche Mitteilung----- > Von: DK7FC > An: rsgb_lf_group > Verschickt: Sa, 29. Dez 2018 19:27 > Betreff: Re: LF: VLF Carrier on 8270.01 Hz from a ground loop antenna - T= he 6th station on Paul's spectrogram > > Hello Jacek, > > Oh, indeed, very clear! I did not expect this at all. The loop, if it > behaves as a loop at all (!), points towards Paul. It should have a null > into your direction. Our distance is 976 km ! > http://k7fry.com/grid/?qth=3DKO02MD&from=3DJN39WI > Why do you see the signal at all? I'm puzzled but it feels good :-) > > Tomorrow, maybe i'll do something on 2970.01 Hz! > > 73, Stefan > > > Am 29.12.2018 18:25, schrieb Jacek Lipkowski: >> Good signal on my grabber: >> >> https://klubnl.pl/wpr/en/index.php/klubnl-pl-grabbers/grabber-4-8270hz/ >> >> What is the antenna orientation? >> >> jacek >> >> On Sat, 29 Dec 2018, DK7FC wrote: >> >>> Date: Sat, 29 Dec 2018 13:43:14 +0100 >>> From: DK7FC >>> Reply-To: rsgb_lf_group@blacksheep.org >>> To: rsgb_lf_group@blacksheep.org >>> Subject: LF: VLF Carrier on 8270.01 Hz from a ground loop antenna - >>> The 6th >>> =C2=A0 =C2=A0 station on Paul's spectrogram >>> >>> Hi VLF friends, >>> >>> Since 11:35 UTC i'm running about 2.5 A antenna current into my 900m >>> long ground loop antenna. Frequency is 8270.01 Hz. The signal is very >>> strong on my own grabber in 57.6 km distance but also at DF6NM, DL0AO >>> and it looks like there is a peak now on Paul's spectrogram building >>> up slowly. >>> I intend to run the carrier for 2 hours or so, until the accu is >>> almost empty :-) >>> The H bridge PA voltage is 175 V and the power consumption is 450 W. >>> Today, the DC measuremant result is 66V for 1 A antenna current. It >>> is cold and wet! >>> More soon. >>> >>> 73 de DK7FC/P in JN39WI >>> >>> PS: The QRN is exceptional low!!!! >>> > > ------=_Part_10789890_649083380.1546166793927 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable
Hi Joe,

you probably&n= bsp;refer to your carrier on 8270.0075 - yes I think you're right, the= re are little Doppler wiggles, with higher frequency during the mornings th= an in the evenings. This does make sense, considering day-night p= hase shifts observed in the long 13.3 hour FFT integration t= ime.

In Paul's 1.5 uHz spectrum covering&nbs= p;one week, we now see a central peak on the nominal frequency, assosiated = by smaller AM and PM sidebands at 11.6 uHz spacing.

Would the connection between your guard rails be approximatel= y oriented towards us?

73, Markus



-----Urspr=C3=BCn= gliche Mitteilung-----
Von: jcraig <jcraig@mun.ca>
An: rsgb_lf_group <rsgb_lf_group@blacksheep.org>
Verschickt: So, 30. Dez 2018 2:21
Betreff: Re: LF: = VLF Carrier on 8270.01 Hz from a ground loop antenna - The 6th station on P= aul's spectrogram

Hi Markus, VLF,

Thanks for mentioning the 8270.0027 Hz traces at DL0AO. I've bee= n watching
closely ever since. There appear t= o be dirunal frequency shifts on
this signal = (or perhaps it is my imagination).

There are guard rails here that run in a straight lin= e for about a km
that would make fine ground= loops for VLF but getting across the pond
mi= ght be challenging.

73
Jor VO1NA


On Sat, 29 Dec 2018, Markus Vester wrote:
> Hi Stefan,
= >
> a similar "miracle" occured at DL0A= O: The trace from your ground loop appeared very strong on the NS-loop= , which should have a null towards your transmitter. The peak was - 120 dB = on EW and V, and -125 dB on NS, only 5 dB difference.
>
> I believe our N-= S receive loop is seeing only the skywave component. Due to the angula= r orientation of your transmit loop, the electric field of the up= ward radiation will be polarized in the NW-SE direction, with the orth= ogonal magnetic field pointing NE-SW. This polarization will be more o= r less retained during the reflection (possibly rotated a bit by Farad= ay effect). So the downgoing wave will also contain a magnetic fi= eld component in the E-W direction, which is then picked up by&nb= sp;the NS-loop.
>
> So yes, earth loops are loops.
>= ;
> Best 73,
> Markus (DF6NM)
>
> -----Urspr=C3=BCngliche Mitteilung-----
> Von: DK7FC <selberdenken@posteo.de>
> An: rsgb_lf_group <rsgb_lf_group@blacksheep.or= g>
> Verschickt: Sa, 29. Dez 2018 1= 9:27
> Betreff: Re: LF: VLF Carrier on 827= 0.01 Hz from a ground loop antenna - The 6th station on Paul's spectrogram<= br clear=3D"none" abp=3D"366">>
> Hello= Jacek,
>
&g= t; Oh, indeed, very clear! I did not expect this at all. The loop, if it> behaves as a loop at all (!), points towar= ds Paul. It should have a null
> into your= direction. Our distance is 976 km !
> http://k7fry.com/grid/?qt= h=3DKO02MD&from=3DJN39WI
> Why do = you see the signal at all? I'm puzzled but it feels good :-)
>
> Tomorrow, maybe i'l= l do something on 2970.01 Hz!
>
> 73, Stefan
>>
> Am 29.1= 2.2018 18:25, schrieb Jacek Lipkowski:
>&g= t; Good signal on my grabber:
>>
>> https://klubnl.pl/wpr/en/index.php/klubnl-pl-g= rabbers/grabber-4-8270hz/
>>
>> What is the antenna orientation?
>>
>> jacek=
>>
>&= gt; On Sat, 29 Dec 2018, DK7FC wrote:
>>= ;
>>> Date: Sat, 29 Dec 2018 13:43:1= 4 +0100
>>> From: DK7FC <selberdenke= n@posteo.de>
>>> Reply-To: rsgb_lf_group@blacksheep.org
>&g= t;> To: rsgb_lf_group@blacksheep.org
>>> Subject: LF: VLF Carrier on 8270.01 Hz from a ground = loop antenna -
>>> The 6th
>>>     station on Paul's spectrog= ram
>>>
>>> Hi VLF friends,
>>>>>> Since 11:35 UTC i'm running about= 2.5 A antenna current into my 900m
>>&= gt; long ground loop antenna. Frequency is 8270.01 Hz. The signal is very>>> strong on my own grabber in 57.6 = km distance but also at DF6NM, DL0AO
>>= > and it looks like there is a peak now on Paul's spectrogram building>>> up slowly.
>>> I intend to run the carrier for 2 hours or so, until = the accu is
>>> almost empty :-)
>>> The H bridge PA voltage is 175 V an= d the power consumption is 450 W.
>>>= ; Today, the DC measuremant result is 66V for 1 A antenna current. It
>>> is cold and wet!
>>> More soon.
>>>= ;
>>> 73 de DK7FC/P in JN39WI
>>>
>>= > PS: The QRN is exceptional low!!!!
>&= gt;>
>
&g= t;
------=_Part_10789890_649083380.1546166793927--