Return-Path: Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by klubnl.pl (8.14.4/8.14.4/Debian-8+deb8u2) with ESMTP id v9KGtW6Z004796 for ; Fri, 20 Oct 2017 18:55:33 +0200 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1e5aUS-0005zx-6C for rs_out_1@blacksheep.org; Fri, 20 Oct 2017 17:49:44 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1e5aUR-0005zo-9m for rsgb_lf_group@blacksheep.org; Fri, 20 Oct 2017 17:49:43 +0100 Received: from mail-oi0-x22b.google.com ([2607:f8b0:4003:c06::22b]) by relay1.thorcom.net with esmtps (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.89) (envelope-from ) id 1e5aUO-0007il-2T for rsgb_lf_group@blacksheep.org; Fri, 20 Oct 2017 17:49:42 +0100 Received: by mail-oi0-x22b.google.com with SMTP id a132so20950761oih.11 for ; Fri, 20 Oct 2017 09:49:38 -0700 (PDT) X-DKIM-Result: Domain=gmail.com Result=Good and Known Domain DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:in-reply-to:references:from:date:message-id:subject:to; bh=hEoai9kOBVj4j7veH7SPpPZdOPt5cpZ+1TtrI3FmiLs=; b=Pi0iNWnY4PGQd5NMrOAnulmwT49GZ4cj4V5BIjHgyUjoNN5YwYHmPMqMp8dbDz0Ftl XKjodaK/lt7nRLXtl1Y1+NXFvS5PCsWRF4QJFZ7S8/4Ub6VFeB0Tekr5Wjs0WjJOW2ri W3Nq8HeP0Cwrgfx0b3WNT6VbLx3/sAAgUSkJiciVnR5tS5OAWH3GBaWn9f8s8RONw2Tu EV26OTRiwfo85bkJpairfWyfLhz33PMxfDPOssjH/bW2nIfVwejviywF878yXa4UMIKO VownfPVwCKzqe8Ys618swRBiPiZ9vo+RAqhSkarzmq6y3uJyIMEmDky4MiQCKM6T+Dan hCtw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:in-reply-to:references:from:date :message-id:subject:to; bh=hEoai9kOBVj4j7veH7SPpPZdOPt5cpZ+1TtrI3FmiLs=; b=dbzSF+3w13Idfvvz4cMwqenp7h7Ao5VCgX02uib8RSoePA1ojjOiyCHZCJK5qRxuAR DU50WGpkwb6r8U3i9Gu4rFfT5B6xLlAPLgDiS/zHB4qJ3v7xVT3e38oJz4FlC8ao+Qv4 KorV7dE15n0Elff/9dFXKnM1dzSaUx3gBnl4SExIozmxSMZdJ/JW+es55lMASTLnpwNY i939GI6pZsylmJ0KXe6qyoH7+3c3JmfiEz3zRUKIaRNmTxHk7gYNFAcrtWF1tx8n1Gkm cNcWnsz935CyA4CIUusv5xUaLOPQr690YaFD3H7twxQpxs9F4ZHVMPuwWTYj0TtbQM6K vQTQ== X-Gm-Message-State: AMCzsaWUjk69RpazzTznivdLScZw/kqUQdsETjVmNKtYQ/0zcsWOhrb8 +oHWTuvwVsFLAjUi1+pGLXD+C1Uri/91jgiqATXyiA== X-Google-Smtp-Source: ABhQp+Tb7pTcxPc+JlMY31tebgx3eWFpaOMEVnRUqhogdmMUDYwS+E7uG9TSkP2czS6lrf+wOEkZ6Iet+KjSeVOKcPQ= X-Received: by 10.157.33.79 with SMTP id l15mr4086487otd.124.1508518177025; Fri, 20 Oct 2017 09:49:37 -0700 (PDT) MIME-Version: 1.0 Received: by 10.157.1.210 with HTTP; Fri, 20 Oct 2017 09:49:36 -0700 (PDT) In-Reply-To: <59EA1F0F.8000804@posteo.de> References: <50fb2ef9-1067-a98e-ad97-502072300286@gmail.com> <59EA1F0F.8000804@posteo.de> From: Roger Lapthorn Date: Fri, 20 Oct 2017 17:49:36 +0100 Message-ID: To: "rsgb_lf_group@blacksheep.org" X-Spam-Score: 0.0 (/) X-Spam-Report: Spam detection software, running on the system "relay1.thorcom.net", has NOT identified this incoming email as spam. The original message has been attached to this so you can view it or label similar future email. If you have any questions, see the administrator of that system for details. Content preview: And this https://www.youtube.com/watch?v=tFUSMbei7uc Both these videos (this one and Stefan's) are seriously scary! Even a few metres up and I am scared. 73s Roger G3XBM [...] Content analysis details: (0.0 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- 0.0 FREEMAIL_FROM Sender email is commonly abused enduser mail provider (rogerlapthorn[at]gmail.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: 07fee8d4a4e8ea80934a0e0aaa44e788 Subject: Re: LF: Fwd: efficiency of long wave transmitters Content-Type: multipart/alternative; boundary="001a11428ea4143397055bfd4237" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.6 required=5.0 tests=HTML_40_50,HTML_MESSAGE, HTML_TAG_EXISTS_TBODY,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 --001a11428ea4143397055bfd4237 Content-Type: text/plain; charset="UTF-8" And this https://www.youtube.com/watch?v=tFUSMbei7uc Both these videos (this one and Stefan's) are seriously scary! Even a few metres up and I am scared. 73s Roger G3XBM On 20 October 2017 at 17:06, DK7FC wrote: > Watch this: https://www.youtube.com/watch?v=LSKm2uQGfIA/ > > 73, Stefan > > > Am 20.10.2017 17:00, schrieb Roger Lapthorn: > > Nearly as tall as mine then ;-) > > On 20 October 2017 at 15:03, Ian Marsh wrote: > >> I'm told that the Anthorn Tx runs 50 KW RF output to a 'T' antenna with a >> radiated power of 17 KW. Unfortunately, I'm not sure of the height of the >> supporting antenna masts but Wikipedia says that they are 227 metres (745 >> ft) tall. >> >> Hope that helps. >> >> Ian G4EXD >> >> On 18/10/2017 16:10, John Rabson wrote: >> >> Can anyone help David Gibson? >> >> John F5VLF >> -------- Forwarded Message -------- >> Subject: efficiency of long wave transmitters >> Date: Wed, 18 Oct 2017 13:54:36 +0100 >> From: David Gibson >> To: Mike Bedford , Rob Gill >> , >> creg-enquiries@bcra.org.uk, C.Trayner@leeds.ac.uk >> >> Mike, Rob, John, Chris... >> >> This is me just being lazy and trying to avoid doing a web search, or >> ploughing through Watt's book on VLF Engineering. Do any of you have a >> reference to a *definitive* statement of the transmitter efficiency of >> the 60kHz Anthorn transmitter and the 198kHz BBC R4 Droitwich transmitter? >> >> -- >> David Gibson >> >> >> >> >> > --001a11428ea4143397055bfd4237 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Both these videos (this one and Stefan's) are seriou= sly scary! Even a few metres up and I am scared.

7= 3s
Roger G3XBM


On 20 October 2017 at 17:06, DK7FC <selberdenken@posteo.de> wrote:
=20 =20
Watch this: https://= www.youtube.com/watch?v=3DLSKm2uQGfIA/

73, Stefan


Am 20.10.2017 17:00, schrieb Roger Lapthorn:
Nearly as tall as mine then ;-)

On 20 October 2017 at 15:03, Ian Marsh <ian= .g4exd@gmail.com> wrote:
I'm told that the Anthor= n Tx runs 50 KW RF output to a 'T' antenna with a radiated power of 17 K= W. Unfortunately, I'm not sure of the height of the supporting antenna masts but Wikipedia says that they are 227 metres (745 ft) tall.

Hope that helps.

Ian G4EXD

On 18/10/2017 16:10, John Rabson wrote:

Can anyone help David Gibson?

John F5VLF

-------- Forwarded Message --------
Subject: efficiency of long wave transmitters
Date: Wed, 18 Oct 2017 13:54:36 +0100
From: David Gibson <david@caves.org.uk>
To: Mike Bedford <bedfordmd@aol.com>, Rob Gill <cre= g-editor@bcra.org.uk>, creg-enquiries@bcra.org.uk, C.T= rayner@leeds.ac.uk 


Mike, Rob, John, Chris...

This is me just being lazy and trying to avoid doing a web search, or
ploughing through Watt's book on VLF Engineering.  Do any of you have a
reference to a *definitive* statement of the transmitter efficiency of
the 60kHz Anthorn transmitter and the 198kHz BBC R4 Droitwich transmitter?

--=20
David Gibson



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