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[195.171.43.25]) by mx.google.com with ESMTP id o8si3125254wib.46.1969.12.31.16.00.00; Thu, 12 Sep 2013 10:33:09 -0700 (PDT) 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 1VKA6T-0007lS-TU for rs_out_1@blacksheep.org; Thu, 12 Sep 2013 17:50:49 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1VKA6T-0007lJ-9W for rsgb_lf_group@blacksheep.org; Thu, 12 Sep 2013 17:50:49 +0100 Received: from omr-d04.mx.aol.com ([205.188.109.201]) by relay1.thorcom.net with esmtps (TLSv1:AES256-SHA:256) (Exim 4.77) (envelope-from ) id 1VKA6Q-0006Xz-Lu for rsgb_lf_group@blacksheep.org; Thu, 12 Sep 2013 17:50:48 +0100 Received: from mtaout-ma02.r1000.mx.aol.com (mtaout-ma02.r1000.mx.aol.com [172.29.41.2]) by omr-d04.mx.aol.com (Outbound Mail Relay) with ESMTP id 775EA70047BC8; Thu, 12 Sep 2013 12:50:43 -0400 (EDT) Received: from [192.168.1.65] (host-92-7-226-93.as43234.net [92.7.226.93]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by mtaout-ma02.r1000.mx.aol.com (MUA/Third Party Client Interface) with ESMTPSA id 825FFE0000B2; Thu, 12 Sep 2013 12:50:42 -0400 (EDT) Message-ID: <5231F0E0.9070306@aol.com> Date: Thu, 12 Sep 2013 17:50:40 +0100 From: pat Organization: G4GVW User-Agent: Mozilla/5.0 (X11; Linux i686; rv:17.0) Gecko/20130803 Thunderbird/17.0.8 MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org CC: M0FMT References: <5230EE74.7070204@virginbroadband.com.au> <82A6D1DDC884424284D5B0BD2329A8CC@gnat> <1379002564.27322.YahooMailNeo@web133206.mail.ir2.yahoo.com> <1379003836.10140.YahooMailNeo@web133204.mail.ir2.yahoo.com> In-Reply-To: <1379003836.10140.YahooMailNeo@web133204.mail.ir2.yahoo.com> x-aol-global-disposition: G DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=mx.aol.com; s=20121107; t=1379004643; bh=vQPGOx7j5OwHyhYMQG/oSyM8uzVsbrUOOgn17dXFX4Y=; h=From:To:Subject:Message-ID:Date:MIME-Version:Content-Type; b=CSkgWssXEJIkQ1BeD7Qnb236jqG2xgQPevj2GIiJos9pSZnQx45PWt+89T4LqwKw9 +DenjVyo7KxYwh1PxEN//wq4+c98pY7x0X9AcgscGHoh1Qj+JZT6M1JqZMvazN4YVB z6sD+/OKsXmJqL0PIO0/z07pIPqIczG4+w2spkFc= x-aol-sid: 3039ac1d29025231f0e25ea1 X-AOL-IP: 92.7.226.93 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: Big, Big Thanks for that one Pete. Have not downloaded anything yet but there are some awesome tomes there! Even when you scroll through to read his method, he has put in a lot of work. 73 On 12/09/13 17:37, M0FMT wrote: > Hi again all > If I am going to give out URL's I may as well try two get it right! > Try..... http://www.tubebooks.org/technical_books_online.htm > 73 es GL Pete M0FMT IO91UX > > *From:* M0FMT > *To:* "rsgb_lf_group@blacksheep.org" > *Sent:* Thursday, 12 September 2013, 17:16 > *Subject:* Re: LF: Re: Broadcast Ground Systems > > Hi All > Please send all radio and electronic books that are out of copy-right > to this web site http://www.tubebooks.org/technical_books_online.htmm > where in due course they will be scanned and published for anyone to > down load for free. This ensures that such works of art are not on one > bookshelf but on many. > 73 es GL Pete M0FMT IO91UX > > *From:* Alan Melia > *To:* rsgb_lf_group@blacksheep.org > *Sent:* Thursday, 12 September 2013, 1:16 > *Subject:* LF: Re: Broadcast Ground Systems > > Hi this is interesting reading, but beware of applyiing it directly to > amateur LF!. BC antennas are usually monoples and the ground > requirement for > those is somewhat different to an amateur antenna where height is often > limited and "T" or inverted "L" antennas are used. Always size your > ground > extent by measuring the system, so that you know when to stop wasting > copper > and effort! Radials are only really effective if they are at least 1/8th > wavelength....that requires a lot of real estate at LF. Also BC engineers > can often choose their site, amateurs rarely can. > > Alan > G3NYK > > ----- Original Message ----- > From: "David Weinreich" > To: >; <600m@yahoogroups.com > > > Sent: Thursday, September 12, 2013 12:34 AM > Subject: LF: Broadcast Ground Systems > > > Dear LF/MFers, > > I have a copy of "Radio Broadcast Ground Systems" that was prepared by > Smith > Electronics of Cleveland, Ohio in [...] 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 [205.188.109.201 listed in list.dnswl.org] 0.0 FREEMAIL_FROM Sender email is commonly abused enduser mail provider (g4gvw[at]aol.com) -0.0 SPF_PASS SPF: sender matches SPF record -0.9 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 X-Scan-Signature: bb953ecadee360a40f72202c1637b86b Subject: Re: LF: Re: Broadcast Ground Systems Content-Type: multipart/alternative; boundary="------------020701060506010501010007" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.8 required=5.0 tests=HTML_30_40,HTML_MESSAGE 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 Status: O X-Status: X-Keywords: X-UID: 2738 This is a multi-part message in MIME format. --------------020701060506010501010007 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Big, Big Thanks for that one Pete. Have not downloaded anything yet but there are some awesome tomes there! Even when you scroll through to read his method, he has put in a lot of work. 73 On 12/09/13 17:37, M0FMT wrote: > Hi again all > If I am going to give out URL's I may as well try two get it right! > Try..... http://www.tubebooks.org/technical_books_online.htm > 73 es GL Pete M0FMT IO91UX > > *From:* M0FMT > *To:* "rsgb_lf_group@blacksheep.org" > *Sent:* Thursday, 12 September 2013, 17:16 > *Subject:* Re: LF: Re: Broadcast Ground Systems > > Hi All > Please send all radio and electronic books that are out of copy-right > to this web site http://www.tubebooks.org/technical_books_online.htmm > where in due course they will be scanned and published for anyone to > down load for free. This ensures that such works of art are not on one > bookshelf but on many. > 73 es GL Pete M0FMT IO91UX > > *From:* Alan Melia > *To:* rsgb_lf_group@blacksheep.org > *Sent:* Thursday, 12 September 2013, 1:16 > *Subject:* LF: Re: Broadcast Ground Systems > > Hi this is interesting reading, but beware of applyiing it directly to > amateur LF!. BC antennas are usually monoples and the ground > requirement for > those is somewhat different to an amateur antenna where height is often > limited and "T" or inverted "L" antennas are used. Always size your > ground > extent by measuring the system, so that you know when to stop wasting > copper > and effort! Radials are only really effective if they are at least 1/8th > wavelength....that requires a lot of real estate at LF. Also BC engineers > can often choose their site, amateurs rarely can. > > Alan > G3NYK > > ----- Original Message ----- > From: "David Weinreich" > > To: >; <600m@yahoogroups.com > > > Sent: Thursday, September 12, 2013 12:34 AM > Subject: LF: Broadcast Ground Systems > > > Dear LF/MFers, > > I have a copy of "Radio Broadcast Ground Systems" that was prepared by > Smith > Electronics of Cleveland, Ohio in 1972. The report provides a digest of > material from Laport's book, the Antenna Engineering Handbook and the > famous > article by Brown, Lewis and Epstein from the IRE Proceedings. I will > gladly > send it to whoever wants it and is willing to pay the postage from > Cleveland, Ohio. First come first served, referenced to e-mail arrival > time. > > Best regards, > > David Weinreich > WA2VUJ/8 > > > > > > > -- 73 de pat g4gvw es gd dx qth nr Felixstowe East Coast UK --------------020701060506010501010007 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit
Big, Big Thanks for that one Pete. Have not downloaded anything yet but there are some awesome tomes there! Even when you scroll through to read his method, he has put in a lot of work.

73




On 12/09/13 17:37, M0FMT wrote:
Hi again all
 
If I am going to give out URL's I may as well try two get it right!
 
73 es GL Pete M0FMT IO91UX

From: M0FMT <m0fmt@yahoo.co.uk>
To: "rsgb_lf_group@blacksheep.org" <rsgb_lf_group@blacksheep.org>
Sent: Thursday, 12 September 2013, 17:16
Subject: Re: LF: Re: Broadcast Ground Systems

Hi All
 
Please send all radio and electronic books that are out of copy-right to this web site http://www.tubebooks.org/technical_books_online.htmm where in due course they will be scanned and published for anyone to down load for free. This ensures that such works of art are not on one bookshelf but on many.
73 es GL Pete M0FMT IO91UX

From: Alan Melia <alan.melia@btinternet.com>
To: rsgb_lf_group@blacksheep.org
Sent: Thursday, 12 September 2013, 1:16
Subject: LF: Re: Broadcast Ground Systems

Hi this is interesting reading, but beware of applyiing it directly to
amateur LF!. BC antennas are usually monoples and the ground requirement for
those is somewhat different to an amateur antenna where height is often
limited and "T" or inverted "L" antennas are used. Always size your ground
extent by measuring the system, so that you know when to stop wasting copper
and effort! Radials are only really effective if they are at least 1/8th
wavelength....that requires a lot of real estate at LF. Also BC engineers
can often choose their site, amateurs rarely can.

Alan
G3NYK

----- Original Message -----
From: "David Weinreich" <David.Weinreich@globalstar.com>
To: <rsgb_lf_group@blacksheep.org>; <600m@yahoogroups.com>
Sent: Thursday, September 12, 2013 12:34 AM
Subject: LF: Broadcast Ground Systems


Dear LF/MFers,

I have a copy of "Radio Broadcast Ground Systems" that was prepared by Smith
Electronics of Cleveland, Ohio in 1972. The report provides a digest of
material from Laport's book, the Antenna Engineering Handbook and the famous
article by Brown, Lewis and Epstein from the IRE Proceedings. I will gladly
send it to whoever wants it and is willing to pay the postage from
Cleveland, Ohio. First come first served, referenced to e-mail arrival time.

Best regards,

David Weinreich
WA2VUJ/8









-- 
73 de pat g4gvw
es gd dx
qth nr Felixstowe
East Coast UK
--------------020701060506010501010007--