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Date: Sun, 3 Oct 2010 06:35:10 -0700 (PDT)
From: Daniele Tincani <danieletincani@yahoo.com>
To: rsgb_lf_group@blacksheep.org
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Subject: Re: LF: Re: looking for a simple-to-build sub-9KHz E-probe
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Hi Alan, thank you for your help. Yes I know a bit=A0about filtering facil=
ities in=20
SpecLab including the auto-notch filter, Paul Nicholson's filter, etc.. Th=
ese=20
help a lot indeed, but I would like to improve the receiver first,=A0may=
 be=A0by=20
adding proper filter circuits in the loop pre-amp I already have?

Best regards
Daniele


________________________________
From: Alan Melia <alan.melia@btinternet.com>
To: rsgb_lf_group@blacksheep.org
Sent: Sun, October 3, 2010 3:12:42 PM
Subject: LF: Re: looking for a simple-to-build sub-9KHz E-probe

Daniele, another thought ...Have you tried the 50Hz comb filter that is
built into the facilities of SpectrumLab ?? This tacts mains hum and
harmonics. It is not as good as getting the antenna away from mains wiring
but is better than nothing if you dont have that option. It has been used=
 a
lot in the VLF group by whister receiver users.

Alan

----- Original Message -----=20
From: "Daniele Tincani" <danieletincani@yahoo.com>
To: <rsgb_lf_group@blacksheep.org>
Sent: Sunday, October 03, 2010 12:31 PM
Subject: VLF: looking for a simple-to-build sub-9KHz E-probe


Hello VLF,

just to try to improve a bit my reception at < 9KHz, I'm looking for a
easy-to-build E-probe design.
Currently I'm using a very simple system
(http://www.vlf.it/easyloop/_easyloop.htm) which works very good but
unfortunately it has to succumb to the intense hum I have all around. In
fact, I
live on the 5th floor of a 6-floors
jointly-owned building in a sub-urban area (in Livorno, Italy). I have a
motorway, a railway, electric powerlines, mobile phone antennas, etc. all
within
a few hundreds meters.
I don't know if an E-probe would survive better than a loop in such an
hostile
enviroment :-) However, a short whip is for sure easier to build and to
handle
than a 70 cm x 70 cm, 40-turns loop like the one I have currently.
I'm also looking for an homebrew design as off-the-shelf receivers look to
me a
bit costly compared to my VLF budget :-)
Any suggestions/references?

Best regards
Daniele


     =20

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<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>Hi Alan, thank you for your help. Yes I know a bit&nbsp;about=
 filtering facilities in SpecLab including the auto-notch filter, Paul Nic=
holson's filter, etc.. These help a lot indeed, but I would like to improv=
e the receiver first,&nbsp;may be&nbsp;by adding proper filter circuits in=
 the loop pre-amp I already have?</DIV>
<DIV>&nbsp;</DIV>
<DIV>Best regards</DIV>
<DIV>Daniele</DIV>
<DIV>&nbsp;</DIV>
<DIV style=3D"FONT-FAMILY: arial, helvetica, sans-serif; FONT-SIZE: 10pt">
<DIV style=3D"FONT-FAMILY: arial, helvetica, sans-serif; FONT-SIZE: 13px">=
<FONT size=3D2 face=3DTahoma>
<HR SIZE=3D1>
<B><SPAN style=3D"FONT-WEIGHT: bold">From:</SPAN></B> Alan Melia &lt;alan.=
melia@btinternet.com&gt;<BR><B><SPAN style=3D"FONT-WEIGHT: bold">To:</SPAN=
></B> rsgb_lf_group@blacksheep.org<BR><B><SPAN style=3D"FONT-WEIGHT: bold"=
>Sent:</SPAN></B> Sun, October 3, 2010 3:12:42 PM<BR><B><SPAN style=3D"FON=
T-WEIGHT: bold">Subject:</SPAN></B> LF: Re: looking for a simple-to-build=
 sub-9KHz E-probe<BR></FONT><BR>Daniele, another thought ...Have you tried=
 the 50Hz comb filter that is<BR>built into the facilities of SpectrumLab=
 ?? This tacts mains hum and<BR>harmonics. It is not as good as getting th=
e antenna away from mains wiring<BR>but is better than nothing if you dont=
 have that option. It has been used a<BR>lot in the VLF group by whister=
 receiver users.<BR><BR>Alan<BR><BR>----- Original Message ----- <BR>From:=
 "Daniele Tincani" &lt;<A href=3D"mailto:danieletincani@yahoo.com" ymailto=
=3D"mailto:danieletincani@yahoo.com">danieletincani@yahoo.com</A>&gt;<BR>T=
o: &lt;<A   href=3D"mailto:rsgb_lf_group@blacksheep.org" ymailto=3D"mailto=
:rsgb_lf_group@blacksheep.org">rsgb_lf_group@blacksheep.org</A>&gt;<BR>Sen=
t: Sunday, October 03, 2010 12:31 PM<BR>Subject: VLF: looking for a simple=
-to-build sub-9KHz E-probe<BR><BR><BR>Hello VLF,<BR><BR>just to try to imp=
rove a bit my reception at &lt; 9KHz, I'm looking for a<BR>easy-to-build=
 E-probe design.<BR>Currently I'm using a very simple system<BR>(http://ww=
w.vlf.it/easyloop/_easyloop.htm) which works very good but<BR>unfortunatel=
y it has to succumb to the intense hum I have all around. In<BR>fact, I<BR=
>live on the 5th floor of a 6-floors<BR>jointly-owned building in a sub-ur=
ban area (in Livorno, Italy). I have a<BR>motorway, a railway, electric po=
werlines, mobile phone antennas, etc. all<BR>within<BR>a few hundreds mete=
rs.<BR>I don't know if an E-probe would survive better than a loop in such=
 an<BR>hostile<BR>enviroment :-) However, a short whip is for sure easier=
 to build and
 to<BR>handle<BR>than a 70 cm x 70 cm, 40-turns loop like the one I have=
 currently.<BR>I'm also looking for an homebrew design as off-the-shelf re=
ceivers look to<BR>me a<BR>bit costly compared to my VLF budget :-)<BR>Any=
 suggestions/references?<BR><BR>Best regards<BR>Daniele<BR><BR><BR><BR><BR=
><BR></DIV></DIV></div><br>







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