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Message-ID: <646839.20132.qm@web111910.mail.gq1.yahoo.com>
References: <4CA9BDE0.4000601@iup.uni-heidelberg.de>
Date: Mon, 4 Oct 2010 05:57:13 -0700 (PDT)
From: Daniele Tincani <danieletincani@yahoo.com>
To: rsgb_lf_group@blacksheep.org, Daniele Tincani <daniele.tincani@alice.it>
Cc: Renato Romero <contact@vlf.it>, Paul <paul@abelian.netcom.co.uk>,
  rsgb_lf_group@blacksheep.org
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Subject: Re: VLF: VLF at different locations and QRN as a function of daytime
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Content-Transfer-Encoding: quoted-printable

Hello Stefan, VLF,

frankly speaking, it is still unbelievable to me that I was able to=A0catc=
h a=20
faint trace of your signal and see it appearing on my PC. This is because=
 of the=20
intense hum at my location and the unsophisticated reception system that=
 I use.=20
Anyway, I'm=A0glad to=A0read your opinion that the screenshot I captured=
 was really=20
showing your tx :-)
I'm also interested in supporting your idea of collecting information abou=
t=20
local QRN at different locations. I'm aways looking for simple-to-build=20
solutions for improving my setup. May be some helpful information could em=
erge=20
from this data analysis you are proposing.
For the time being, these are the information you have requested: the loca=
tor is=20
JN53EM. As for the callsign, I'm sorry, I haven't one. I'm only "registere=
d" as=20
a SWL and my identifier is I0169LI (http://www.qrz.com/db/I0169LI/).

Cheers
Daniele



________________________________
From: Stefan Sch=E4fer <schaefer@iup.uni-heidelberg.de>
To: Daniele Tincani <daniele.tincani@alice.it>
Cc: Renato Romero <contact@vlf.it>; Paul <paul@abelian.netcom.co.uk>;=20
rsgb_lf_group@blacksheep.org
Sent: Mon, October 4, 2010 1:43:28 PM
Subject: VLF: VLF at different locations and QRN as a function of daytime

Hi Daniele, VLF,

Congrats to your successful VLF reception! :-) If you compare your receive=
d=20
signal to that of Renato Romero, it is not much weaker. Since Renatos Ante=
nna is=20
excellent, i assume the low S/N is caused either by local QRN in Italy or=
 simply=20
by the propagation. If i remember correctly, in my 3rd experiment, Renatos=
=20
reception was one of the best of all! So maybe we should/could learn somet=
hing=20
about the VLF propagation between Germany and Italy, above the alps. I thi=
nk the=20
lower S/N is not (only) due to the presence of the alps! All this is very=
=20
interesting :-)

There is still no reception in Italy on 6470 Hz (46 km band), sadly. It is=
 just=20
because of my mistake with the generator :-( At least 2 hours of TX time=
 was=20
lost :-( Ok, never mind...
Maybe 6470 Hz is much more suitable to cross the alps. We will check this=
 in the=20
next experiment i would say? :-)

6470 Hz has many advantages i think, at least if the mains hum at a given=
 RX=20
location is about at equal or less strength than on 8970 Hz. I have observ=
ed=20
that the (day)time of low QRN is much longer there. Another question is ho=
w the=20
S/N as a function of time behaves. Attached you see a capture of my 'wideb=
and'=20
grabber window of the last sunday (including those nerving horizontal loca=
l QRM=20
lines). You can see the frequency region of the maximum sferics level is=
=20
changing with daytime. On 8970 Hz it is 'dark' from 7...12 UTC but on 6470=
 Hz it=20
is 'dark' from 7...17 UTC.

Maybe some VLF receiving OMs can record their 'wideband' window on their=
 own=20
location and we can share the results. This makes it easyer the compare th=
e=20
situation of various locations :-) And we could discuss about the best tim=
e for=20
a transmission either on 33 km or on 46 km to reach a given location.

Daniele, can you tell me your call and locator? I want to set up a list of=
 the=20
successful VLF receptions :-)

73, Stefan/DK7FC


     =20

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Content-Type: text/html; charset=iso-8859-1
Content-Transfer-Encoding: quoted-printable

<html><head><style type=3D"text/css"><!-- DIV {margin:0px;} --></style></h=
ead><body><div style=3D"font-family:arial, helvetica, sans-serif;font-size=
:10pt"><DIV>Hello Stefan, VLF,</DIV>
<DIV>&nbsp;</DIV>
<DIV>frankly speaking, it is still unbelievable to me that I was able to&n=
bsp;catch a faint trace of your signal and see it appearing on my PC. This=
 is because of the intense hum at my location and the unsophisticated rece=
ption system that I use. Anyway, I'm&nbsp;glad to&nbsp;read your opinion=
 that the screenshot I captured was really showing your tx :-)<BR>I'm also=
 interested in supporting your idea of collecting information about local=
 QRN at different locations. I'm aways looking for simple-to-build solutio=
ns for improving my setup. May be some helpful information could emerge fr=
om this data analysis you are proposing.</DIV>
<DIV>For the time being, these are the information you have requested: the=
 locator is JN53EM. As for the callsign, I'm sorry, I haven't one. I'm onl=
y "registered" as a SWL and my identifier is I0169LI (<A href=3D"http://ww=
w.qrz.com/db/I0169LI/">http://www.qrz.com/db/I0169LI/</A>).</DIV>
<DIV>&nbsp;</DIV>
<DIV>Cheers</DIV>
<DIV>Daniele</DIV>
<DIV style=3D"FONT-SIZE: 10pt; FONT-FAMILY: arial, helvetica, sans-serif">=
<BR>
<DIV style=3D"FONT-SIZE: 13px; FONT-FAMILY: arial, helvetica, sans-serif">=
<FONT face=3DTahoma size=3D2>
<HR SIZE=3D1>
<B><SPAN style=3D"FONT-WEIGHT: bold">From:</SPAN></B> Stefan Sch=E4fer &lt=
;schaefer@iup.uni-heidelberg.de&gt;<BR><B><SPAN style=3D"FONT-WEIGHT: bold=
">To:</SPAN></B> Daniele Tincani &lt;daniele.tincani@alice.it&gt;<BR><B><S=
PAN style=3D"FONT-WEIGHT: bold">Cc:</SPAN></B> Renato Romero &lt;contact@v=
lf.it&gt;; Paul &lt;paul@abelian.netcom.co.uk&gt;; rsgb_lf_group@blackshee=
p.org<BR><B><SPAN style=3D"FONT-WEIGHT: bold">Sent:</SPAN></B> Mon, Octobe=
r 4, 2010 1:43:28 PM<BR><B><SPAN style=3D"FONT-WEIGHT: bold">Subject:</SPA=
N></B> VLF: VLF at different locations and QRN as a function of daytime<BR=
></FONT><BR>Hi Daniele, VLF,<BR><BR>Congrats to your successful VLF recept=
ion! :-) If you compare your received signal to that of Renato Romero, it=
 is not much weaker. Since Renatos Antenna is excellent, i assume the low=
 S/N is caused either by local QRN in Italy or simply by the propagation.=
 If i remember correctly, in my 3rd experiment, Renatos reception was one=
 of the best of all!
 So maybe we should/could learn something about the VLF propagation betwee=
n Germany and Italy, above the alps. I think the lower S/N is not (only)=
 due to the presence of the alps! All this is very interesting :-)<BR><BR>=
There is still no reception in Italy on 6470 Hz (46 km band), sadly. It is=
 just because of my mistake with the generator :-( At least 2 hours of TX=
 time was lost :-( Ok, never mind...<BR>Maybe 6470 Hz is much more suitabl=
e to cross the alps. We will check this in the next experiment i would say=
? :-)<BR><BR>6470 Hz has many advantages i think, at least if the mains hu=
m at a given RX location is about at equal or less strength than on 8970=
 Hz. I have observed that the (day)time of low QRN is much longer there.=
 Another question is how the S/N as a function of time behaves. Attached=
 you see a capture of my 'wideband' grabber window of the last sunday (inc=
luding those nerving horizontal local QRM lines). You can see the frequenc=
y region of the
 maximum sferics level is changing with daytime. On 8970 Hz it is 'dark'=
 from 7...12 UTC but on 6470 Hz it is 'dark' from 7...17 UTC.<BR><BR>Maybe=
 some VLF receiving OMs can record their 'wideband' window on their own lo=
cation and we can share the results. This makes it easyer the compare the=
 situation of various locations :-) And we could discuss about the best ti=
me for a transmission either on 33 km or on 46 km to reach a given locatio=
n.<BR><BR>Daniele, can you tell me your call and locator? I want to set up=
 a list of the successful VLF receptions :-)<BR><BR>73, Stefan/DK7FC<BR><B=
R><BR></DIV></DIV></div><br>

      </body></html>

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