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LF: Re: 26 - Linearly Loaded Tee Antenna

To: <[email protected]>
Subject: LF: Re: 26 - Linearly Loaded Tee Antenna
From: "Alan Melia" <[email protected]>
Date: Tue, 17 Jul 2012 16:05:03 +0100
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ÿþ<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML ChildAreas="4" xmlns:canvas><HEAD> <META content="text/html; charset=unicode" http-equiv=Content-Type> <META name=GENERATOR content="MSHTML 8.00.6001.19258"> <STYLE></STYLE> </HEAD> <BODY style="PADDING-LEFT: 10px; PADDING-RIGHT: 10px; PADDING-TOP: 15px" id=MailContainerBody leftMargin=0 topMargin=0 bgColor=#ffffff CanvasTabStop="false" name="Compose message area"> <DIV><FONT size=2 face=Arial>Hi Graham.....you can get up a quarter wave vertical on 500k ??!! :-))</FONT></DIV> <DIV><FONT size=2 face=Arial></FONT>&nbsp;</DIV> <DIV><FONT size=2 face=Arial>But yes top-load does yield improved signals through lowering the ground loss (also increasing the aerial capacity so reducing the amount of wire needed in the loading coil.) The parallel wires, and they can be in any configuration .....dont need to be meander since you are not interested in resonant lengths.....they can be in a fan form.....but need to be around a meter apart to measure a difference. They do need to couple to "clear ground".....i.e not be run over roofs or lossy foliage. In rought terms if you double the length of the top-wire you half the ground-loss. (capacity increase around 6pF per extra metre) and so increase the antenna current and consequentially the ERP</FONT></DIV> <DIV><FONT size=2 face=Arial></FONT>&nbsp;</DIV> <DIV><FONT size=2 face=Arial>Alan</FONT></DIV> <DIV><FONT size=2 face=Arial>G3NYK</FONT></DIV> <BLOCKQUOTE style="BORDER-LEFT: #000000 2px solid; PADDING-LEFT: 5px; PADDING-RIGHT: 0px; MARGIN-LEFT: 5px; MARGIN-RIGHT: 0px"> <DIV style="FONT: 10pt arial">----- Original Message ----- </DIV> <DIV style="FONT: 10pt arial; BACKGROUND: #e4e4e4; font-color: black"><B>From:</B> <A title=g8fzk@g8fzk.fsnet.co.uk href="mailto:g8fzk@g8fzk.fsnet.co.uk">Graham</A> </DIV> <DIV style="FONT: 10pt arial"><B>To:</B> <A title=rsgb_lf_group@blacksheep.org href="mailto:rsgb_lf_group@blacksheep.org">rsgb_lf_group@blacksheep.org</A> </DIV> <DIV style="FONT: 10pt arial"><B>Sent:</B> Tuesday, July 17, 2012 2:53 PM</DIV> <DIV style="FONT: 10pt arial"><B>Subject:</B> LF: 26 - Linearly Loaded Tee Antenna</DIV> <DIV><BR></DIV> <DIV id=PublishHeaderContainer contentEditable=false> <TABLE style="BACKGROUND-COLOR: #f5f5f5; WIDTH: 100%; FONT-FAMILY: Verdana; WHITE-SPACE: nowrap; COLOR: #aaaaaa; FONT-SIZE: 11px; RIGHT: 0px; LEFT: 10px" cellSpacing=0 cellPadding=8> <TBODY> <TR style="MARGIN: 40px"> <TD> <TABLE cellSpacing=0 cellPadding=0> <TBODY> <TR> <TD style="WIDTH: 20px"><IMG alt="Play slideshow" src="cid:24D998A11EFC4DF08D222263A5CFB8C4@gnat" width=16 height=16></TD> <TD title="View photos as a slideshow"><A style="FONT-FAMILY: Verdana; WHITE-SPACE: nowrap; COLOR: #444444; FONT-SIZE: 11px" href="http://g.msn.com/5meen_us/171?path=/photomail/{933494be-7436-498c-9b92-3371c28b8791}&amp;image=5E8A655F46F4C97A!2018&amp;imagehi=5E8A655F46F4C97A!2016&amp;CID=6812368846238042490">Play slideshow</A></TD> <TD style="WIDTH: 16px"></TD> <TD style="WIDTH: 20px"><IMG style="TEXT-ALIGN: right" alt="Save all photos" src="cid:BD2713D38B214A34837D3AA7FBF7C0D0@gnat" width=16 height=16></TD> <TD style="DISPLAY: none" title="Download and save high-resolution versions of these photos"><A style="FONT-FAMILY: Verdana; WHITE-SPACE: nowrap; COLOR: #444444; FONT-SIZE: 11px" name=layoutSaveAllImages>Save all photos </A></TD> <TD style="FONT-FAMILY: Verdana; WHITE-SPACE: nowrap; COLOR: #b2b2b2; FONT-SIZE: 11px; colorsend: #444444" title="With Windows Live Mail, you can save all of the photos in this message in a few simple steps">Want to save all these photos at once? <A href="http://help.live.com/help.aspx?mkt=en-us&amp;project=WL_Mailv3&amp;querytype=keyword&amp;query=segami_lla_evas" name=layoutSaveAllImagesPromote>Learn how </A></TD></TR></TBODY></TABLE></TD> <TD style="TEXT-ALIGN: right">Online pictures are available for 30 days </TD></TR></TBODY></TABLE> <DIV>&nbsp;</DIV></DIV> <DIV style="PADDING-BOTTOM: 2px; PADDING-LEFT: 7px; WIDTH: 100%; PADDING-RIGHT: 5px; PADDING-TOP: 2px"> <DIV>Useful&nbsp; link&nbsp;&nbsp; </DIV> <DIV>&nbsp;</DIV> <DIV>Any thoughts on this&nbsp; for&nbsp; a&nbsp; top&nbsp; section&nbsp; to&nbsp; Inv -L&nbsp;&nbsp; </DIV> <DIV>&nbsp;</DIV> <DIV>I ran something&nbsp; similar till&nbsp; it&nbsp; fell&nbsp; down , seemed&nbsp; to&nbsp; give&nbsp; a&nbsp; better&nbsp; signal , with&nbsp; top&nbsp; wires&nbsp; 4&nbsp; ft&nbsp; apart&nbsp; , 500K </DIV> <DIV>&nbsp;</DIV> <DIV>73 -G.. </DIV> <DIV>&nbsp;</DIV> <DIV>&nbsp;</DIV> <DIV>&nbsp;</DIV> <DIV><A title=http://www.qsl.net/va3iul/Antenna/Wire%20Antennas%20for%20Ham%20Radio/Wire_antennas_for_ham_radio.htm href="http://www.qsl.net/va3iul/Antenna/Wire%20Antennas%20for%20Ham%20Radio/Wire_antennas_for_ham_radio.htm">http://www.qsl.net/va3iul/Antenna/Wire%20Antennas%20for%20Ham%20Radio/Wire_antennas_for_ham_radio.htm</A></DIV> <DIV>&nbsp;</DIV> <DIV>&nbsp;</DIV></DIV><SPAN contentEditable=false><SPAN style="DISPLAY: block" layoutEmptyTextWellFont="Tahoma" xmlns:canvas="canvas-namespace-id"><SPAN style="DISPLAY: block; MARGIN-BOTTOM: 15px; HEIGHT: 18px; OVERFLOW: visible"></SPAN><SPAN style="DISPLAY: inline-block; MARGIN-BOTTOM: 25px; HEIGHT: 551px; VERTICAL-ALIGN: top; OVERFLOW: visible; MARGIN-RIGHT: 25px"> <TABLE style="HEIGHT: 551px"> <TBODY> <TR> <TD> <DIV style="WIDTH: 700px; HEIGHT: 525px; OVERFLOW: hidden" title="View or save a high-resolution copy of this photo"><A href="http://public.bay.livefilestore.com/y1paea2wPl2YMjk-ktSkpz8AeKi7XkGHdaaf_vI-jaQgHTdGLVyNHQx0SeJUR1e-UFn9b8Zz7ZqUeV8J-G_r_n9fQ/26-Linearly%20Loaded%20Tee%20Antenna%5B1%5D.jpg?download" name=msnPhotoHref border="0"><IMG style="MARGIN-TOP: 0px; DISPLAY: inline-block; MARGIN-LEFT: auto" border=0 src="cid:BA0C136F440644139133E4314620EF27@gnat" width=563 height=525></A></DIV></TD></TR> <TR> <TD> <DIV style="TEXT-ALIGN: center; WIDTH: 700px; FONT-FAMILY: verdana; FONT-SIZE: 10pt"></DIV></TD></TR></TBODY></TABLE></SPAN></SPAN></SPAN> <DIV style="PADDING-BOTTOM: 2px; PADDING-LEFT: 7px; WIDTH: 100%; PADDING-RIGHT: 5px; HEIGHT: 50px; PADDING-TOP: 2px"></DIV> <DIV style="MARGIN-TOP: 50px" contentEditable=false> <TABLE style="BACKGROUND-COLOR: #f5f5f5; WIDTH: 100%; FONT-FAMILY: Verdana; WHITE-SPACE: nowrap; FONT-SIZE: 11px; RIGHT: 0px; LEFT: 10px" cellSpacing=0 cellPadding=10 align=left> <TBODY> <TR> <TD title="Join Windows Live to share photos using Windows Live Photo E-mail" colSpan=2><A style="COLOR: #444444" href="http://g.msn.com/5meen_us/175">Get Windows Live Mail to create your own photo e-mails </A></TD></TR></TBODY></TABLE></DIV></BLOCKQUOTE></BODY></HTML>

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