Return-Path: Received: from mtain-mj01.r1000.mx.aol.com (mtain-mj01.r1000.mail.aol.com [172.21.164.85]) by air-dc01.mail.aol.com (v129.4) with ESMTP id MAILINDC013-864d4d27784c1cc; Fri, 07 Jan 2011 15:32:12 -0500 Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-mj01.r1000.mx.aol.com (Internet Inbound) with ESMTP id 4B6AD38000083; Fri, 7 Jan 2011 15:32:09 -0500 (EST) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1PbIyB-0004lq-4Y for rs_out_1@blacksheep.org; Fri, 07 Jan 2011 20:31:31 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1PbIyA-0004lf-If for rsgb_lf_group@blacksheep.org; Fri, 07 Jan 2011 20:31:30 +0000 Received: from mail-iy0-f171.google.com ([209.85.210.171]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1PbIy8-000083-0D for rsgb_lf_group@blacksheep.org; Fri, 07 Jan 2011 20:31:30 +0000 Received: by iyj21 with SMTP id 21so16622814iyj.16 for ; Fri, 07 Jan 2011 12:31:21 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:received:received:in-reply-to :references:date:message-id:subject:from:to:content-type; bh=j97IH5B2VIEEsw9bTL1Mkmkr1Q2d64h+cY1W1FynarU=; b=tgubZl8M1QnBpu/gg6yNuerH7ThCsIWI1r1tupU6JnGzC8Z4jQJk42IeQ/6HsS/nxW f5OT1EflZRoqBxesHedNrhR+WkajNTHIa9Hx3OgMtrr5PrnoxX3oB5VHaRQsPVUVgTQ4 3X42nPXJt1F3qEkUivAhGOe9wCURABd7Wgfqg= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :content-type; b=bf1wEtsVlYYCg/mh8jiYzqxR2nwJQLFsZWiztiQuGOb9NXjPkOeYcfxPsurM2IqXpB DoPnYl5LaVqoIQv4aaa27hrLRXiIywPjetIx3by6A5a1xXUshnpza40nF0C1gMDmcTti 23LmJn1++Cxxdgk3leJ+yTUawsRpm1zri0glQ= MIME-Version: 1.0 Received: by 10.42.170.199 with SMTP id g7mr1336224icz.149.1294432281436; Fri, 07 Jan 2011 12:31:21 -0800 (PST) Received: by 10.42.239.5 with HTTP; Fri, 7 Jan 2011 12:31:21 -0800 (PST) In-Reply-To: <85CEACD8BCC84EF68F30F843720D1B93@JimPC> References: <002801cbadf3$1e15bb70$0301a8c0@your91hoehfy9g> <1294359648.6336.6.camel@vaio3rd> <001501cbae53$54fee2a0$0401a8c0@xphd97xgq27nyf> <4D26EE51.8010706@o2.ie> <001f01cbae5c$01cc94c0$0401a8c0@xphd97xgq27nyf> <556535.74415.qm@web28101.mail.ukl.yahoo.com> <1294405086.5826.11.camel@pat-compaq-evo> <822454.92408.qm@web28108.mail.ukl.yahoo.com> <85CEACD8BCC84EF68F30F843720D1B93@JimPC> Date: Fri, 7 Jan 2011 20:31:21 +0000 Message-ID: From: Roger Lapthorn To: rsgb_lf_group@blacksheep.org DomainKey-Status: good (testing) X-Spam-Score: 0.3 (/) X-Spam-Report: autolearn=disabled,HTML_IMAGE_RATIO_02=0.192,HTML_MESSAGE=0.001,HTML_TAG_EXIST_TBODY=0.126 Subject: Re: LF: Re: JA GRRABBERS (sic) at a same time Content-Type: multipart/alternative; boundary=90e6ba6e83f65222a70499478093 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, HTML_TAG_EXISTS_TBODY 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 x-aol-global-disposition: G X-AOL-SCOLL-AUTHENTICATION: mail_rly_antispam_dkim-d249.2 ; domain : gmail.com DKIM : pass x-aol-sid: 3039400c89a24d2778494b1c X-AOL-IP: 195.171.43.25 X-Mailer: Unknown (No Version) --90e6ba6e83f65222a70499478093 Content-Type: text/plain; charset=ISO-8859-1 Can we all club together and buy a cymometer from an antiques shop for Mal? 73s Roger On 7 January 2011 14:13, James Moritz wrote: > Dear LF Group, > > A quote from JA Fleming, Marconi's technical advisor: > > "The wavelength of the electric waves sent out from Poldhu Marconi station > in 1901 was not measured because I did not invent my cymometer or wavemeter > until October 1904. The height of the original aerial (1901) was 200 feet, > but then there was a coil of a transformer or "jiggeroo" as we called it in > series with it. My estimate was that the original wavelength must have been > not less than about 3,000 feet, but it was considerably lengthened later on. > I knew at that time that the diffraction or bending of the rays around the > earth would be increased by increasing the wavelength and after the first > success I was continually urging Marconi to lengthen the wavelength, and > that was done when commercial transmission began. I remember I designed > special cymometers to measure up to 20,000 feet or so". > > A "cymometer" was an early absorbtion wavemeter - I remember there used to > be one in the Science Museum in London - I think the scale was calibrated in > feet... > > Cheers, Jim Moritz > 73 de M0BMU > > -- g3xbm-qrp.blogspot.com/ www.g3xbm.co.uk www.youtube.com/user/g3xbm G3XBM GQRP 1678 ISWL G11088 <#> <#> <#> <#> --90e6ba6e83f65222a70499478093 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Can we all club together and buy a cymometer from an antiques shop for Mal= ?

73s
Roger

On 7 January 2011 14:13, James Moritz <james.moritz@btopenworld.com= > wrote:
Dear LF Group,<= br>
A quote from JA Fleming, Marconi's technical advisor:

"The wavelength of the electric waves sent out from Poldhu Marconi st= ation in 1901 was not measured because I did not invent my cymometer or wa= vemeter until October 1904. The height of the original aerial (1901) was= 200 feet, but then there was a coil of a transformer or "jiggeroo&qu= ot; as we called it in series with it. My estimate was that the original= wavelength must have been not less than about 3,000 feet, but it was cons= iderably lengthened later on. I knew at that time that the diffraction or= bending of the rays around the earth would be increased by increasing the= wavelength and after the first success I was continually urging Marconi= to lengthen the wavelength, and that was done when commercial transmissio= n began. I remember I designed special cymometers to measure up to 20,000= feet or so".

A "cymometer" was an early absorbtion wavemeter - I remember the= re used to be one in the Science Museum in London - I think the scale was= calibrated in feet...

Cheers, Jim Moritz
73 de M0BMU




--
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