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[195.171.43.25]) by mx.google.com with ESMTP id a19si4868797wja.103.2014.03.08.09.38.18 for ; Sat, 08 Mar 2014 09:38:18 -0800 (PST) Received-SPF: neutral (google.com: 195.171.43.25 is neither permitted nor denied by best guess record for domain of owner-rsgb_lf_group@blacksheep.org) client-ip=195.171.43.25; Authentication-Results: mx.google.com; spf=neutral (google.com: 195.171.43.25 is neither permitted nor denied by best guess record for domain of owner-rsgb_lf_group@blacksheep.org) smtp.mail=owner-rsgb_lf_group@blacksheep.org Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1WML7O-0005iW-4c for rs_out_1@blacksheep.org; Sat, 08 Mar 2014 17:33:02 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1WML7N-0005iN-Ko for rsgb_lf_group@blacksheep.org; Sat, 08 Mar 2014 17:33:01 +0000 Received: from blu0-omc1-s5.blu0.hotmail.com ([65.55.116.16]) by relay1.thorcom.net with esmtp (Exim 4.82) (envelope-from ) id 1WML7L-00066H-QW for rsgb_lf_group@blacksheep.org; Sat, 08 Mar 2014 17:33:00 +0000 Received: from BLU180-W33 ([65.55.116.8]) by blu0-omc1-s5.blu0.hotmail.com with Microsoft SMTPSVC(6.0.3790.4675); Sat, 8 Mar 2014 09:32:57 -0800 X-TMN: [Bu05ay7ctSHs4WzPm5wd38Ck6IQDVXVL] X-Originating-Email: [rjraide@hotmail.com] Message-ID: From: Bob Raide To: "rsgb_lf_group@blacksheep.org" Date: Sat, 8 Mar 2014 12:32:56 -0500 Importance: Normal In-Reply-To: <531B4E01.7000304@abelian.org> References: <2662DF5AA7FA416CBB09CDB90BBFF7B1@White> <016101cf39df$4f4c89a0$ede59ce0$@comcast.net>, <01dc01cf3a3f$86997bb0$93cc7310$@comcast.net>, <2FC5CAB271A6437CB35A5B100185CEDA@White> <025101cf3a52$e0925750$a1b705f0$@comcast.net> <7DB9DD5669FC4C648838510DCAC08AFB@White> <531A506E.9040103@abelian.org> <531A5C19.9060209@abelian.org> <02ba01cf3aa3$debaad50$9c3007f0$@comcast.net> <531AF126.2060600@abelian.org> <850A470A5B9F4483BED8B49D4791044A@White>,<531B1D0C.3070208@abelian.org> ,<531B4E01.7000304@abelian.org> MIME-Version: 1.0 X-OriginalArrivalTime: 08 Mar 2014 17:32:57.0119 (UTC) FILETIME=[71B592F0:01CF3AF4] X-Spam-Score: -0.0 (/) X-Spam-Report: Spam detection software, running on the system "relay1.thorcom.net", has identified this incoming email as possible spam. The original message has been attached to this so you can view it (if it isn't spam) or label similar future email. If you have any questions, see the administrator of that system for details. Content preview: Paul; It is not only the ground but the air temp has great influence and maybe much more than the shallow depths of the ground freezing-Bob > Date: Sat, 8 Mar 2014 17:06:09 +0000 > From: vlf0403@abelian.org > To: rsgb_lf_group@blacksheep.org > Subject: Re: LF: Daytime 29.499 kHz > > > Bob wrote: > > > Wonder what effects soil conductivity changes has on the > > propagation at these VLF freqs?? > > I have no information. You would expect ground resistance > to rise, but would that make noticeable difference to > propagation if it is only a freezing of a shallow surface > layer? > > I had to go to a narrower bandwidth to produce phase and > amplitude plots for last night's test > > http://abelian.org/vlf/tmp/29499_140308a.gif > > Signal is down by some 5dB compared with some recent > tests. > > Nothing detected this afternoon. > > Propagation seems normal, noise floor normal. > > Maybe the cold and frozen ground is affecting the tx > efficiency, some lower Q of the loading coil - antenna - > ground loop, or a reduction of effective height. > > Will be interesting to see what happens after the thaw. > > -- > Paul Nicholson > -- > [...] 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 [65.55.116.16 listed in list.dnswl.org] 0.0 FREEMAIL_FROM Sender email is commonly abused enduser mail provider (rjraide[at]hotmail.com) -0.0 T_RP_MATCHES_RCVD Envelope sender domain matches handover relay domain -0.0 SPF_PASS SPF: sender matches SPF record 0.0 HTML_MESSAGE BODY: HTML included in message X-Scan-Signature: 39d0aa3a8a50eef73e9de70bcfcadb32 Content-Type: multipart/alternative; boundary="_97fe0c20-7090-4964-8060-34701d8d42e7_" Subject: RE: LF: Daytime 29.499 kHz X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: * X-Spam-Status: No, hits=1.1 required=5.0 tests=FORGED_HOTMAIL_RCVD, HTML_MESSAGE,MAILTO_TO_SPAM_ADDR,TO_ADDRESS_EQ_REAL 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 --_97fe0c20-7090-4964-8060-34701d8d42e7_ Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Paul=3B It is not only the ground but the air temp has great influence and maybe mu= ch more than the shallow depths of the ground freezing-Bob =20 > Date: Sat=2C 8 Mar 2014 17:06:09 +0000 > From: vlf0403@abelian.org > To: rsgb_lf_group@blacksheep.org > Subject: Re: LF: Daytime 29.499 kHz >=20 >=20 > Bob wrote: >=20 > > Wonder what effects soil conductivity changes has on the > > propagation at these VLF freqs?? >=20 > I have no information. You would expect ground resistance > to rise=2C but would that make noticeable difference to > propagation if it is only a freezing of a shallow surface > layer? >=20 > I had to go to a narrower bandwidth to produce phase and > amplitude plots for last night's test >=20 > http://abelian.org/vlf/tmp/29499_140308a.gif >=20 > Signal is down by some 5dB compared with some recent > tests. >=20 > Nothing detected this afternoon. >=20 > Propagation seems normal=2C noise floor normal. >=20 > Maybe the cold and frozen ground is affecting the tx > efficiency=2C some lower Q of the loading coil - antenna - > ground loop=2C or a reduction of effective height. >=20 > Will be interesting to see what happens after the thaw. >=20 > -- > Paul Nicholson > -- >=20 = --_97fe0c20-7090-4964-8060-34701d8d42e7_ Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Paul=3B
It is not only the gr= ound but the air temp has great influence and maybe much more than the shal= low depths of the ground freezing-Bob
 =3B
>=3B Date: Sat= =2C 8 Mar 2014 17:06:09 +0000
>=3B From: vlf0403@abelian.org
>=3B= To: rsgb_lf_group@blacksheep.org
>=3B Subject: Re: LF: Daytime 29.499= kHz
>=3B
>=3B
>=3B Bob wrote:
>=3B
>=3B >= =3B Wonder what effects soil conductivity changes has on the
>=3B >= =3B propagation at these VLF freqs??
>=3B
>=3B I have no informa= tion. You would expect ground resistance
>=3B to rise=2C but would t= hat make noticeable difference to
>=3B propagation if it is only a fre= ezing of a shallow surface
>=3B layer?
>=3B
>=3B I had to g= o to a narrower bandwidth to produce phase and
>=3B amplitude plots fo= r last night's test
>=3B
>=3B http://abelian.org/vlf/tmp/29499= _140308a.gif
>=3B
>=3B Signal is down by some 5dB compared with = some recent
>=3B tests.
>=3B
>=3B Nothing detected this aft= ernoon.
>=3B
>=3B Propagation seems normal=2C noise floor normal= .
>=3B
>=3B Maybe the cold and frozen ground is affecting the tx=
>=3B efficiency=2C some lower Q of the loading coil - antenna -
&g= t=3B ground loop=2C or a reduction of effective height.
>=3B
>= =3B Will be interesting to see what happens after the thaw.
>=3B
&= gt=3B --
>=3B Paul Nicholson
>=3B --
>=3B
=
= --_97fe0c20-7090-4964-8060-34701d8d42e7_--