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[195.171.43.25]) by mx.google.com with ESMTP id lr5si6154849wjb.138.2014.01.11.10.39.27 for ; Sat, 11 Jan 2014 10:39:27 -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; dkim=pass header.i=@mx.aol.com Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1W22KY-0003ba-Kn for rs_out_1@blacksheep.org; Sat, 11 Jan 2014 17:26:42 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1W22KY-0003bR-2E for rsgb_lf_group@blacksheep.org; Sat, 11 Jan 2014 17:26:42 +0000 Received: from omr-d02.mx.aol.com ([205.188.109.194]) by relay1.thorcom.net with esmtps (TLSv1:AES256-SHA:256) (Exim 4.77) (envelope-from ) id 1W22KV-0004bw-Bk for rsgb_lf_group@blacksheep.org; Sat, 11 Jan 2014 17:26:40 +0000 Received: from mtaout-mcd01.mx.aol.com (mtaout-mcd01.mx.aol.com [172.26.223.205]) by omr-d02.mx.aol.com (Outbound Mail Relay) with ESMTP id 0C15570000091 for ; Sat, 11 Jan 2014 12:26:37 -0500 (EST) Received: from White (95-91-238-155-dynip.superkabel.de [95.91.238.155]) by mtaout-mcd01.mx.aol.com (MUA/Third Party Client Interface) with ESMTPA id 4FA6438000087 for ; Sat, 11 Jan 2014 12:26:33 -0500 (EST) Message-ID: From: "Markus Vester" To: References: ,<45C914842E044970AE255AC43CA09FB3@White>, Date: Sat, 11 Jan 2014 18:26:30 +0100 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal Importance: Normal X-Mailer: Microsoft Windows Live Mail 12.0.1606 X-MimeOLE: Produced By Microsoft MimeOLE V12.0.1606 x-aol-global-disposition: G DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=mx.aol.com; s=20121107; t=1389461197; bh=opAev2q0wtCDOicUHHvJqdpxEdHLphSDjSVknNJagzk=; h=From:To:Subject:Message-ID:Date:MIME-Version:Content-Type; b=KckeI3Z1qWZqRStsHnZXrIRc6DdAnUmSq7WD/OYloVfQRmWCz0A255JZrAi52N2xX MQEo5uhFz5NLFcR65tkfeazevL1RQb7TAY08eCTF4sGWIJoCdAtjosvun4sQ3bkySP HZjapNgNOli40UiqwPX2e1uD816YT6+BCVvJk8Do= x-aol-sid: 3039ac1adfcd52d17ec937b4 X-AOL-IP: 95.91.238.155 X-Spam-Score: 0.9 (/) 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: Bob, it's the same antenna that I use for LF. The mast is a fishing rod on an aluminium telescopic pole, pushed out of an unused chimney. It carries three topload legs (N, W and S), about 42 m wire in total (230 pF). The apex is 20 m AGL or 11 m above the roof, but the effective height is only 9 m (calibrated at 138 kHz). On VLF frequencies this is probably even a bit lower due to increased shunting effect from trees. Assuming heff = 0.8 m, radiation resistance on 8.3 kHz would be 0.08 milliohm. With 60 Watts input, I got 0.3 A and 25 kV rms, and radiated power (EMRP) would be around 7 microwatts. [...] Content analysis details: (0.9 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at http://www.dnswl.org/, no trust [205.188.109.194 listed in list.dnswl.org] 0.0 FREEMAIL_FROM Sender email is commonly abused enduser mail provider (markusvester[at]aol.com) -0.0 SPF_PASS SPF: sender matches SPF record -0.1 RP_MATCHES_RCVD Envelope sender domain matches handover relay domain 0.0 HTML_MESSAGE BODY: HTML included in message 0.0 T_DKIM_INVALID DKIM-Signature header exists but is not valid 1.0 FREEMAIL_REPLY From and body contain different freemails X-Scan-Signature: 63130203bdd9ddf2cbf93b2de3d1651e Subject: Re: VLF: 8270 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0008_01CF0EFA.A613C4C0" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.3 required=5.0 tests=HTML_50_60,HTML_MESSAGE, MISSING_OUTLOOK_NAME 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 Dies ist eine mehrteilige Nachricht im MIME-Format. ------=_NextPart_000_0008_01CF0EFA.A613C4C0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Bob, it's the same antenna that I use for LF. The mast is a fishing rod on an = aluminium telescopic pole, pushed out of an unused chimney. It carries = three topload legs (N, W and S), about 42 m wire in total (230 pF). The = apex is 20 m AGL or 11 m above the roof, but the effective height is = only 9 m (calibrated at 138 kHz). On VLF frequencies this is probably = even a bit lower due to increased shunting effect from trees. Assuming = heff =3D 0.8 m, radiation resistance on 8.3 kHz would be 0.08 milliohm. = With 60 Watts input, I got 0.3 A and 25 kV rms, and radiated power = (EMRP) would be around 7 microwatts. Here's a sketch of the wire layout and the auxiliary H- and E-field = receive antennas: http://dl.dropboxusercontent.com/u/26404526/Hans-Fallada-59_antennas.jpg = One could actually see the antenna in Google Map's slant view, but the = imagery may have changed since: http://dl.dropboxusercontent.com/u/26404526/googlemaps_df6nm_antenna.jpg http://maps.google.de/maps?ll=3D49.4158,11.1350&z=3D21 Best 73, Markus From: Bob Raide=20 Sent: Saturday, January 11, 2014 5:37 PM To: rsgb_lf_group@blacksheep.org=20 Subject: RE: VLF: 8270 Markus; What are you using for antenna on 8270? =20 -------------------------------------------------------------------------= ------- From: bvgbob@hotmail.com To: rsgb_lf_group@blacksheep.org Date: Sat, 11 Jan 2014 14:28:32 +0100 Subject: RE: VLF: 8270 Hello Markus! Nice signal here, congratulations! Lubos, OK2BVG -------------------------------------------------------------------------= ------- From: markusvester@aol.com To: rsgb_lf_group@blacksheep.org CC: paul@abelian.netcom.co.uk Date: Sat, 11 Jan 2014 13:59:58 +0100 Subject: Re: VLF: 8270 Took the carrier off air at 12:48. Looks like a good trace at OK2BVG, = and a dash with marginal SNR in Todmorden UK.=20 73, Markus From: Markus Vester=20 Sent: Saturday, January 11, 2014 11:33 AM To: rsgb_lf_group@blacksheep.org=20 Subject: VLF: 8270 At 10:23 I have started to transmit a straight carrier on 8270.000 Hz, = estimated ERP around 14 uW. If all stays well, I'll leave it on for a = couple of hours, trying to leave a dash on Lubos' and perhaps Paul's = spectrograms. 73, Markus (DF6NM) ------=_NextPart_000_0008_01CF0EFA.A613C4C0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Bob,
 
it's the same antenna that I use = for LF. The=20 mast is a fishing rod on an aluminium telescopic pole, pushed out of an = unused=20 chimney. It carries three topload legs (N, W and S), about 42 m = wire in=20 total (230 pF). The apex is 20 m AGL or 11 m above the roof, = but the=20 effective height is only 9 m (calibrated at 138 kHz). On VLF = frequencies=20 this is probably even a bit lower due to increased shunting effect from = trees.=20 Assuming heff =3D 0.8 m, radiation resistance on 8.3 kHz would = be 0.08=20 milliohm. With 60 Watts input, I got 0.3 A and 25 kV rms,=20 and radiated power (EMRP) would be around 7 = microwatts.
 
Here's a sketch of the wire layout and = the=20 auxiliary H- and E-field receive antennas:
http://dl.dropboxusercontent.com/u/26404526/Hans-Fallada-59_ante= nnas.jpg 
 
One could actually see the = antenna in Google=20 Map's slant view, but the imagery may have changed = since:
http://dl.dropboxusercontent.com/u/26404526/googlemaps_df6nm_ant= enna.jpg
http://maps.google.de/maps?ll=3D49.4158,11.1350&z=3D21
 
Best 73,
Markus

From:=20 Bob = Raide
Sent: Saturday, January = 11, 2014 5:37=20 PM
To: rsgb_lf_group@blacksheep.org
Subject: RE: VLF:=20 8270

Markus;
What are you using = for antenna=20 on 8270?
 
From: bvgbob@hotmail.com
To:=20 rsgb_lf_group@blacksheep.org
Date: Sat, 11 Jan 2014 14:28:32 +0100
Subject: RE: VLF:=20 8270

Hello Markus!
Nice signal here,=20 congratulations!

Lubos, = OK2BVG

From: markusvester@aol.com
To:=20 rsgb_lf_group@blacksheep.org
CC: paul@abelian.netcom.co.uk
Date:=20 Sat, 11 Jan 2014 13:59:58 +0100
Subject: Re: VLF: = 8270

Took the carrier off air at = 12:48. Looks=20 like a good trace at OK2BVG, and a dash with marginal SNR in Todmorden = UK.=20
 
73, Markus
 

From: Markus = Vester=20
Sent: Saturday, = January 11,=20 2014 11:33 AM
To: = rsgb_lf_group@blacksheep.org
Subject: VLF:=20 8270

At 10:23 I have started to = transmit a=20 straight carrier on 8270.000 Hz, estimated ERP around 14 uW. If all = stays well,=20 I'll leave it on for a couple of hours, trying to leave a dash = on Lubos'=20 and perhaps Paul's spectrograms.
 
73, Markus=20 (DF6NM)
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