<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML><HEAD><TITLE></TITLE>
<META http-equiv=Content-Type content="text/html; charset=iso-8859-1">
<STYLE>.hmmessage P {
PADDING-RIGHT: 0px; PADDING-LEFT: 0px; PADDING-BOTTOM: 0px; MARGIN: 0px; PADDING-TOP: 0px
}
BODY.hmmessage {
FONT-SIZE: 10pt; FONT-FAMILY: Verdana
}
</STYLE>
<META content="MSHTML 6.00.2900.5764" name=GENERATOR></HEAD>
<BODY class=hmmessage bgColor=#ffffff>
<DIV><FONT face=Arial>Boas </FONT></DIV>
<DIV><FONT face=Arial>Matias, o grafico de ROE que apresentas é com a
configuração onde está optimizada a largura de banda???</FONT></DIV>
<DIV><FONT face=Arial></FONT> </DIV>
<DIV><FONT face=Arial>73 Gomes CT1HIX</FONT></DIV>
<BLOCKQUOTE
style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B>
<A title=ct1ffu@hotmail.com href="mailto:ct1ffu@hotmail.com">antonio
matias</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A title=cluster@radio-amador.net
href="mailto:cluster@radio-amador.net">cluster@radio-amador.net</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Thursday, May 28, 2009 12:46
AM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> RE: ARLA/CLUSTER: As Yagis
revolucionarias em fotos.</DIV>
<DIV><BR></DIV>Olá Gomes.
<DIV>A LFA : loop feed array não é uma moxon, mas sim um
loop, rectângulo fechado.</DIV>
<DIV>Este sistema é muito interessante, pois apresenta uma isenção
de lóbulos laterais quase nula</DIV>
<DIV>o que permite que a antena tenha uma temperatura de ruído
Kº extremamente baixa.</DIV>
<DIV>Este loop saiu ainda com bonus, pois além das vantagens do
ruido, melhor sustentabilidade mecânica, permite que seja</DIV>
<DIV>alimentada de duas maneiras.</DIV>
<DIV>Uma a antena fica com o ganho máximo, mas com perda
de largura de banda.</DIV>
<DIV>Outra é o oposto, sacrificando um pouco do ganho, a antena permite
cobertura de mais banda.</DIV>
<DIV>Isto sempre garantindo uma impedância de 50 homs
e reactância sempre perto de j 0.</DIV>
<DIV>A diferença consiste simplesmente no ponto de alimentação.</DIV>
<DIV>Alimentado como na foto ( elemento perto do reflector), é onde tem mais
ganho, se alimentar no lado</DIV>
<DIV> da frente do rectângulo ( elemento perto do 1º director)tem
mais largura de banda.</DIV>
<DIV><BR></DIV>
<DIV>em anexo algumas antenas por mim desenhadas no sistema FLA.</DIV>
<DIV>Pode-se ver nas fotos como ligar a alimentação.</DIV>
<DIV>Plot de radiação e diagrama de SWR ao longo da banda.</DIV>
<DIV>Note esta antena é para 144mhz e tem 6 metros de boom.</DIV>
<DIV><BR></DIV>
<DIV>73's</DIV>
<DIV> Matias</DIV>
<DIV><BR>
<HR id=stopSpelling>
From: ct1hix@sapo.pt<BR>To: cluster@radio-amador.net<BR>Subject: Re:
ARLA/CLUSTER: As Yagis revolucionarias em fotos.<BR>Date: Wed, 27 May 2009
18:43:46 +0100<BR><BR>
<STYLE>
</STYLE>
<DIV><FONT face=Arial size=2>Boas</FONT></DIV>
<DIV><FONT face=Arial size=2>Não é uma Moxon com elementos
parazitas!!!!</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>73 Gomes CT1HIX</FONT></DIV>
<BLOCKQUOTE
style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B>
<A title=ct1hix@sapo.pt href="mailto:ct1hix@sapo.pt">Gomes</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A title=cluster@radio-amador.net
href="mailto:cluster@radio-amador.net">Resumo Noticioso Electrónico ARLA</A>
</DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Wednesday, May 27, 2009 6:12
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: ARLA/CLUSTER: As Yagis
revolucionarias em fotos.</DIV>
<DIV><BR></DIV>
<DIV><FONT face=Arial size=2>Boas</FONT></DIV>
<DIV><FONT face=Arial size=2>Uma Moxon com elementos
parazitas!!!????</FONT></DIV>
<DIV><FONT face=Arial size=2>Pelo menos é o que me parece....</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>73 Gomes CT1HIX</FONT></DIV>
<BLOCKQUOTE
style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B>
<A title=joao.a.costa@ctt.pt href="mailto:joao.a.costa@ctt.pt">João
Gonçalves Costa</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A title=cluster@radio-amador.net
href="mailto:cluster@radio-amador.net">'Resumo Noticioso Electrónico
ARLA'</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Cc:</B> <A
title=radioamadores_algarve@yahoogrupos.com.br
href="mailto:'radioamadores_algarve@yahoogrupos.com.br'">'radioamadores_algarve@yahoogrupos.com.br'</A>
</DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Wednesday, May 27, 2009 5:15
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> ARLA/CLUSTER: As Yagis
revolucionarias em fotos.</DIV>
<DIV><BR></DIV>
<TABLE class=EC_contentpaneopen>
<TBODY>
<TR>
<TD vAlign=top><SPAN class=small><FONT color=#999999 size=2>Written
by G0KSC </FONT></SPAN> </TD></TR>
<TR>
<TD vAlign=top>
<P align=center><A href="http://www.vinecom.co.uk/"><IMG height=142
src="http://www.g0ksc.co.uk/images/stories/vine.gif" width=237
border=0></A> </P>
<P align=center>Vine Antennas are the appointed UK manufaturer and
distributor of the LFA Yagi </P>
<DIV style="TEXT-ALIGN: center"><A
title="KMA Antennas - for LFA Yagis in North America"
href="http://www.kmaantennas.com/">
<DIV class="EC_img_caption " style="WIDTH: 575px"><IMG class=caption
title="KMA Have just been appointed as North American Dealer for LFA Yagis. Contact them for more information"
height=99
src="http://www.g0ksc.co.uk/images/stories/kma_logo_top.gif"
width=575 border=0> KMA Have just been appointed as North American
Dealer for LFA Yagis. Contact them for more
information<BR></DIV></A></DIV><FONT face=Verdana>Today I am pleased
to announce the launch of the new Loop Fed Array (LFA) Yagi antenna.
The LFA Yagi is not fed with a dipole as would be traditional Yagi
antennas. Instead it is fed with a full wave loop which is laid flat
on the boom between the Reflector and first director
elements.</FONT><BR><FONT face=Verdana>DUBUS Magazine has the
exclusive release of the details into this antenna with some of the
first models although I will be releasing build-yourself-models and
full information on performance and how it works in the very near
future.</FONT><BR><FONT face=Verdana>In short, the LFA provides
superior performance over the traditional Yagi in many areas and
provides a platform which provides Quad and Yagi features in one
visually pleasing package.</FONT><BR><FONT face=Verdana></FONT><BR>
<DIV class="EC_img_caption " style="WIDTH: 400px"><FONT
face=Verdana><IMG class=caption
title="A 70MHz LFA Yagi with a massive 10.9dBi Gain" alt=lfa
src="http://www.g0ksc.co.uk/images/stories/4mtrlfa.jpg" border=0>
</FONT><FONT face=Verdana>A 70MHz LFA Yagi with a massive 10.9dBi
Gain</FONT><BR></DIV><FONT face=Verdana></FONT><BR><FONT
face=Verdana>Please bookmark this site and check back over the
comming weeks for details of how you can build and own one of these
exciting antennas!</FONT><BR><FONT face=Verdana></FONT><BR>
<DIV class="EC_img_caption " style="WIDTH: 400px"><FONT
face=Verdana><IMG class=caption
title="Driving was difficult with this one. 2 X 9el LFA for 144MHz portable use"
src="http://www.g0ksc.co.uk/images/stories/2x9el.jpg" border=0>
</FONT><FONT face=Verdana>Driving was difficult with this one. 2 X
9el LFA for 144MHz portable use</FONT><BR></DIV><FONT
face=Verdana></FONT><BR><FONT face=Verdana><EM><STRONG>NO matching
device needed, 50 Ohm Direct feed, NO POWER RESTRICTIONS! That's the
beauty of the LFA!'</STRONG></EM> </FONT><BR><FONT
face=Verdana></FONT><BR>
<DIV class="EC_img_caption " style="WIDTH: 500px"><FONT
face=Verdana><IMG class=caption
title="3 element 28Mhz LFA with an incredible 9dBi Gain!"
src="http://www.g0ksc.co.uk/images/stories/3el28mhzlfa.jpg"
border=0> </FONT><FONT face=Verdana>3 element 28Mhz LFA with an
incredible 9dBi Gain!</FONT><BR></DIV><FONT
face=Verdana></FONT><BR><FONT face=Verdana> The above 3 element
28MHz LFA is now installed at M5ADX. First 'on air' tests against a
CB 18 foot vertical showed a signal increase from S1 to S9!when
switching to the G0KSC LFA.</FONT><BR><FONT face=Verdana></FONT><BR>
<DIV class="EC_img_caption " style="WIDTH: 500px"><FONT
face=Verdana><IMG class=caption
src="http://www.g0ksc.co.uk/images/stories/5ellfa.jpg"
border=0></FONT></DIV><FONT face=Verdana></FONT><BR><FONT
face=Verdana>Above is the 5 element 50MHz LFA in use now at G0KSC.
This antenna is 4.7 metres long, has just over 11dBi forward gain
and 22dB front to back ratio at worst. More importantly, the antenna
shows a 1:1 flat SWR curve from 50 to 50.50MHz and a return loss no
lower that -30dB down, peaking at -60dB down!</FONT><BR><FONT
face=Verdana></FONT> <BR><FONT face=Verdana></FONT><BR>
<DIV class="EC_img_caption " style="WIDTH: 500px"><FONT
face=Verdana><IMG class=caption
title="a wide-spaced 5 el Yagi for 70MHz ready for the G0KSC Tower. This produces 11.3dBi and 25dB F/R"
src="http://www.g0ksc.co.uk/images/stories/5el70.jpg" border=0>
</FONT><FONT face=Verdana>a wide-spaced 5 el Yagi for 70MHz ready
for the G0KSC Tower. This produces 11.3dBi and 25dB
F/R</FONT><BR></DIV><FONT face=Verdana></FONT><BR><FONT
face=Verdana>With all LFA's <STRONG>fine</STRONG> tuning is made
easy by the end pieces of the loop being made out of a smaller gauge
tubing and hence, a trombone effect allows the loop to be increased
or decreased in size. </FONT><BR><FONT
face=Verdana></FONT> <BR><FONT face=Verdana></FONT><BR>
<DIV class="EC_img_caption " style="WIDTH: 500px"><FONT
face=Verdana><IMG class=caption
src="http://www.g0ksc.co.uk/images/stories/5el -50mhz 6.6metres low noise.jpg"
border=0></FONT></DIV><FONT face=Verdana></FONT><BR><STRONG><FONT
face=Verdana>Tired of all that noise you pick up from around your
own home and other building near where you
live?</FONT></STRONG><BR><FONT face=Verdana>This is the first of my
new Low-Noise LFA Yagis. Massive suppression side lobes in both the
H and V plane means minium local noise pick up and minimum
interferance when transmitting. Details on this antenna and others
like it will be in the next issue of DUBUS Magazine. The above
antenna is a 5 element LFA for 50MHz with a 6.6 metre boom made from
1.5 inch box section tube. Elements are 16mm thick while the loop is
22.23mm thick with 19.05mm end sections. <STRONG>11.5dB Gain, 28dB
Front to REAR</STRONG>. The suppresion extends forwards by 15
degress in order to remove straight up and straight down lobes.
</FONT><BR><STRONG><FONT face=Verdana>If you are not into building
Antennas..</FONT></STRONG><BR><FONT
face=Verdana><STRONG>www.vinecom.co.uk </STRONG>- Vine Antennas are
going into production with the LFA so check their site out and give
them a call with what you are looking for!</FONT><BR><FONT
face=Verdana></FONT> <BR><EM><STRONG><FONT face=Verdana>Best
DX,</FONT></STRONG></EM><BR><STRONG><FONT face=Verdana>Justin
G0KSC</FONT> </STRONG><BR></TD></TR></TBODY></TABLE><BR>
<HR>
<BR>_______________________________________________<BR>CLUSTER mailing
list<BR>CLUSTER@radio-amador.net<BR>http://radio-amador.net/cgi-bin/mailman/listinfo/cluster<BR></BLOCKQUOTE><BR>
<HR>
Estou utilizando a versão gratuita de SPAMfighter para usuários
privados.<BR>Foi removido 174 emails de spam até hoje.<BR>Os usuários
pagantes não têm esta mensagem nos seus emails.<BR>Experimente <A
href="http://www.spamfighter.com/lpt">SPAMfighter</A> de graça
agora!<BR><BR>
<HR>
<BR>_______________________________________________<BR>CLUSTER mailing
list<BR>CLUSTER@radio-amador.net<BR>http://radio-amador.net/cgi-bin/mailman/listinfo/cluster<BR></BLOCKQUOTE></DIV><BR>
<HR>
Conheça os novos produtos Windows Live. <A
href="http://www.windowslive.com.br" target=_new>Clique aqui!</A>
<P>
<HR>
<P></P>_______________________________________________<BR>CLUSTER mailing
list<BR>CLUSTER@radio-amador.net<BR>http://radio-amador.net/cgi-bin/mailman/listinfo/cluster<BR></BLOCKQUOTE><!-- SPAMfighter Signature --><br><hr>Estou utilizando a versão gratuita de SPAMfighter para usuários privados.<br />Foi removido 174 emails de spam até hoje.<br />Os usuários pagantes não têm esta mensagem nos seus emails.<br />Experimente <a href="http://www.spamfighter.com/lpt">SPAMfighter</a> de graça agora!<br /></BODY></HTML>