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<DIV><SPAN class=257001213-05072008><FONT face=Arial color=#0000ff>Obrigado
Matias</FONT></SPAN></DIV>
<DIV><SPAN class=257001213-05072008><FONT face=Arial color=#0000ff>Para ser mais
objectivo, no esquema do diplexer que se encontra em <A
href="http://www.observations.biz/OBS_Elsewhere/HB9ABX_diplexer%202m%20-%2070cm.htm">http://www.observations.biz/OBS_Elsewhere/HB9ABX_diplexer%202m%20-%2070cm.htm</A> o
autor diz as capacidades dos condensadores, qual a tensão?</FONT></SPAN></DIV>
<DIV><SPAN class=257001213-05072008><FONT face=Arial color=#0000ff>No mercado
para a mesma capacidade á varios valores...</FONT></SPAN></DIV>
<DIV><SPAN class=257001213-05072008><FONT face=Arial
color=#0000ff></FONT></SPAN> </DIV><SPAN class=257001213-05072008>
<DIV align=left><FONT face=Arial size=2>73 CT1HIX Gomes</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=Arial color=#0000ff></FONT></SPAN> </DIV>
<DIV><SPAN class=257001213-05072008></SPAN><FONT face=Tahoma>-----Mensagem
original-----<BR><B>De:</B> cluster-bounces@radio-amador.net
[mailto:cluster-bounces@radio-amador.net] <B>Em nome de </B>antonio
matias<BR><B>Enviada:</B> sábado, 5 de Julho de 2008 13:48<BR><B>Para:</B>
Resumo Noticioso Electrónico ARLA<BR><B>Assunto:</B> [PHISHING]: RE:
ARLA/CLUSTER: Escolher Condensadores???<BR><BR></DIV></FONT>
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Colega Gomes<BR> <BR>Está a perguntar sobre os condençadores de RF, mas
isso é um pouco vago.<BR>Presumo que sejam condençadores de
acoplamento.<BR>Factores importantes são: a corrente, a temperatura e o
isolamento.<BR>Para alta tensão, tipo placas das Valvulas, normamente usam-se
condençadores de disco, ceramicos.<BR> <BR><A
href="http://images.google.com/imgres?imgurl=http://www.foxtango.org/amplifiers/graphics/Cracked%2520Ceramic%2520Caps.jpg&imgrefurl=http://www.foxtango.org/amplifiers/FL%2520Amplifier%2520Evolution.htm&h=480&w=640&sz=34&hl=pt-BR&start=29&um=1&tbnid=mDOia4QLGhalRM:&tbnh=103&tbnw=137&prev=/images%3Fq%3Dcapacitors%2BHV%26start%3D20%26ndsp%3D20%26um%3D1%26hl%3Dpt-BR%26client%3Dfirefox-a%26rls%3Dorg.mozilla:pt-BR:official%26sa%3DN"><IMG
style="BORDER-RIGHT: 1px solid; BORDER-TOP: 1px solid; BORDER-LEFT: 1px solid; BORDER-BOTTOM: 1px solid"
height=103
src="http://tbn0.google.com/images?q=tbn:mDOia4QLGhalRM:http://www.foxtango.org/amplifiers/graphics/Cracked%2520Ceramic%2520Caps.jpg"
width=137 NOSEND="1"></A> ou <A
href="http://images.google.com/imgres?imgurl=http://www.genvolt.co.uk/pictures/ceramic.jpg&imgrefurl=http://www.genvolt.co.uk/index.php%3Fpage%3Dallproducts%26sec%3D15&h=500&w=500&sz=24&hl=pt-BR&start=35&um=1&tbnid=al4-j3dVhESmwM:&tbnh=130&tbnw=130&prev=/images%3Fq%3Dcapacitors%2BHV%26start%3D20%26ndsp%3D20%26um%3D1%26hl%3Dpt-BR%26client%3Dfirefox-a%26rls%3Dorg.mozilla:pt-BR:official%26sa%3DN"><IMG
style="BORDER-RIGHT: 1px solid; BORDER-TOP: 1px solid; BORDER-LEFT: 1px solid; BORDER-BOTTOM: 1px solid"
height=130
src="http://tbn0.google.com/images?q=tbn:al4-j3dVhESmwM:http://www.genvolt.co.uk/pictures/ceramic.jpg"
width=130 NOSEND="1"></A> <A
href="http://images.google.com/imgres?imgurl=http://www.chinavendors.com/upload/cvo/product/super-high-voltage-ceramic-capacitors-0000035725-S.jpg&imgrefurl=http://www.b2bchinasources.com/China-Manufacturers-13829/Ceramic-Capacitors.html&h=80&w=80&sz=3&hl=pt-BR&start=100&um=1&tbnid=f1hUJ0uqP7ReYM:&tbnh=74&tbnw=74&prev=/images%3Fq%3Dhi%2Bq%2Bcapacitors%2BHV%2B%26start%3D80%26ndsp%3D20%26um%3D1%26hl%3Dpt-BR%26client%3Dfirefox-a%26rls%3Dorg.mozilla:pt-BR:official%26sa%3DN"><IMG
style="BORDER-RIGHT: 1px solid; BORDER-TOP: 1px solid; BORDER-LEFT: 1px solid; WIDTH: 106px; BORDER-BOTTOM: 1px solid; HEIGHT: 108px"
height=74
src="http://tbn0.google.com/images?q=tbn:f1hUJ0uqP7ReYM:http://www.chinavendors.com/upload/cvo/product/super-high-voltage-ceramic-capacitors-0000035725-S.jpg"
width=74 NOSEND="1"></A><A
href="http://images.google.com/imgres?imgurl=http://www.foxtango.org/amplifiers/graphics/Cracked%2520Ceramic%2520Caps.jpg&imgrefurl=http://www.foxtango.org/amplifiers/FL%2520Amplifier%2520Evolution.htm&h=480&w=640&sz=34&hl=pt-BR&start=29&um=1&tbnid=mDOia4QLGhalRM:&tbnh=103&tbnw=137&prev=/images%3Fq%3Dcapacitors%2BHV%26start%3D20%26ndsp%3D20%26um%3D1%26hl%3Dpt-BR%26client%3Dfirefox-a%26rls%3Dorg.mozilla:pt-BR:official%26sa%3DN"></A><A
href="http://images.google.com/imgres?imgurl=http://www.foxtango.org/amplifiers/graphics/Cracked%2520Ceramic%2520Caps.jpg&imgrefurl=http://www.foxtango.org/amplifiers/FL%2520Amplifier%2520Evolution.htm&h=480&w=640&sz=34&hl=pt-BR&start=29&um=1&tbnid=mDOia4QLGhalRM:&tbnh=103&tbnw=137&prev=/images%3Fq%3Dcapacitors%2BHV%26start%3D20%26ndsp%3D20%26um%3D1%26hl%3Dpt-BR%26client%3Dfirefox-a%26rls%3Dorg.mozilla:pt-BR:official%26sa%3DN"></A><BR> <BR>de
tensão de isolamento 20KV e 1000pf de capacidade.<BR>Para circuitos
de baixa impedancia, amplificadores transitorisados , filtros de antena,
ou sintonizadores, usam-se condensadores de Mica, pois
suportam melhor o RF sob altas correntes.<BR> <BR><A
href="http://images.google.com/imgres?imgurl=http://www.iclcapacitores.com.br/images/prata.jpg&imgrefurl=http://www.iclcapacitores.com.br/produtos.html&h=190&w=230&sz=9&hl=pt-BR&start=28&um=1&tbnid=6sRa0Jj1w8rqKM:&tbnh=89&tbnw=108&prev=/images%3Fq%3Dcapacitors%2Bmica%26start%3D20%26ndsp%3D20%26um%3D1%26hl%3Dpt-BR%26client%3Dfirefox-a%26rls%3Dorg.mozilla:pt-BR:official%26sa%3DN"><IMG
style="BORDER-RIGHT: 1px solid; BORDER-TOP: 1px solid; BORDER-LEFT: 1px solid; BORDER-BOTTOM: 1px solid"
height=89
src="http://tbn0.google.com/images?q=tbn:6sRa0Jj1w8rqKM:http://www.iclcapacitores.com.br/images/prata.jpg"
width=108 NOSEND="1"></A> ou <A
href="http://images.google.com/imgres?imgurl=http://jimmyauw.com/wp-datajim/audio/53_mica.jpg&imgrefurl=http://jimmyauw.com/2006/09/14/my-high-quality-audio-grade-components/&h=264&w=450&sz=27&hl=pt-BR&start=68&um=1&tbnid=pZ-LrdS2sIxLCM:&tbnh=75&tbnw=127&prev=/images%3Fq%3Dcapacitors%2Bmica%26start%3D60%26ndsp%3D20%26um%3D1%26hl%3Dpt-BR%26client%3Dfirefox-a%26rls%3Dorg.mozilla:pt-BR:official%26sa%3DN"><IMG
style="BORDER-RIGHT: 1px solid; BORDER-TOP: 1px solid; BORDER-LEFT: 1px solid; BORDER-BOTTOM: 1px solid"
height=75
src="http://tbn0.google.com/images?q=tbn:pZ-LrdS2sIxLCM:http://jimmyauw.com/wp-datajim/audio/53_mica.jpg"
width=127 NOSEND="1"></A> <A
href="http://images.google.com/imgres?imgurl=http://img.alibaba.com/images/cms/content/135x135_080222_capacitors_3.jpg&imgrefurl=http://www.alibaba.com/activities/features/capacitors.html&h=135&w=135&sz=3&hl=pt-BR&start=49&um=1&tbnid=jgmEtE6NOsR_9M:&tbnh=92&tbnw=92&prev=/images%3Fq%3Dcapacitors%2Bvariable%2B%2Bmica%26start%3D40%26ndsp%3D20%26um%3D1%26hl%3Dpt-BR%26lr%3D%26client%3Dfirefox-a%26rls%3Dorg.mozilla:pt-BR:official%26sa%3DN"><IMG
style="BORDER-RIGHT: 1px solid; BORDER-TOP: 1px solid; BORDER-LEFT: 1px solid; BORDER-BOTTOM: 1px solid"
height=92
src="http://tbn0.google.com/images?q=tbn:jgmEtE6NOsR_9M:http://img.alibaba.com/images/cms/content/135x135_080222_capacitors_3.jpg"
width=92 NOSEND="1"></A><BR><BR>Os condensadores variaveis de Mica tambem são
de grande qualidade.<BR><BR><A
href="http://images.google.com/imgres?imgurl=http://www.tedss.com/electronic-parts/images/capacitors/CeramicVariableCapacitor.gif&imgrefurl=http://www.zimtechdistributors.com/electronicdivision.htm&h=73&w=106&sz=3&hl=pt-BR&start=78&um=1&tbnid=AbswcMUkI7rWVM:&tbnh=58&tbnw=84&prev=/images%3Fq%3Dcapacitors%2Bvariable%2B%2Bmica%26start%3D60%26ndsp%3D20%26um%3D1%26hl%3Dpt-BR%26lr%3D%26client%3Dfirefox-a%26rls%3Dorg.mozilla:pt-BR:official%26sa%3DN"><IMG
style="BORDER-RIGHT: 1px solid; BORDER-TOP: 1px solid; BORDER-LEFT: 1px solid; BORDER-BOTTOM: 1px solid"
height=58
src="http://tbn0.google.com/images?q=tbn:AbswcMUkI7rWVM:http://www.tedss.com/electronic-parts/images/capacitors/CeramicVariableCapacitor.gif"
width=84 NOSEND="1"></A> <BR> <BR>Claro depois temos o Supra-sumo,
os de vacuo.<BR><A
href="http://images.google.com/imgres?imgurl=http://www.nd2x.net/ur4ll/000-vac-caps.jpg&imgrefurl=http://www.nd2x.net/ur4ll.html&h=382&w=579&sz=23&hl=pt-BR&start=20&um=1&tbnid=Xf78t8fU3U-60M:&tbnh=88&tbnw=134&prev=/images%3Fq%3Dvacuum%2Bcapacitors%26um%3D1%26hl%3Dpt-BR%26client%3Dfirefox-a%26rls%3Dorg..mozilla:pt-BR:official%26sa%3DX"><IMG
style="BORDER-RIGHT: 1px solid; BORDER-TOP: 1px solid; BORDER-LEFT: 1px solid; BORDER-BOTTOM: 1px solid"
height=88
src="http://tbn0.google.com/images?q=tbn:Xf78t8fU3U-60M:http://www.nd2x.net/ur4ll/000-vac-caps.jpg"
width=134 NOSEND="1"></A> fixos ou variaveis. <A
href="http://images.google.com/imgres?imgurl=http://www.g3ynh.info/comps/vac_c/vaccap_1.jpg&imgrefurl=http://www.g3ynh.info/comps/vac_caps.html&h=354&w=576&sz=31&hl=pt-BR&start=59&um=1&tbnid=j-x9aH-jzTpBHM:&tbnh=82&tbnw=134&prev=/images%3Fq%3Dvacuum%2Bcapacitors%26start%3D40%26ndsp%3D20%26um%3D1%26hl%3Dpt-BR%26client%3Dfirefox-a%26rls%3Dorg.mozilla:pt-BR:official%26sa%3DN"><IMG
style="BORDER-RIGHT: 1px solid; BORDER-TOP: 1px solid; BORDER-LEFT: 1px solid; BORDER-BOTTOM: 1px solid"
height=82
src="http://tbn0.google.com/images?q=tbn:j-x9aH-jzTpBHM:http://www.g3ynh.info/comps/vac_c/vaccap_1.jpg"
width=134 NOSEND="1"></A><BR> <BR>73's<BR>Matias<BR>
<BLOCKQUOTE>
<HR>
From: ct1hix@sapo.pt<BR>To: cluster@radio-amador.net<BR>Date: Sat, 5 Jul
2008 13:07:41 +0100<BR>Subject: ARLA/CLUSTER: Escolher
Condensadores???<BR><BR>
<META content="Microsoft SafeHTML" name=Generator>
<DIV>
<DIV><FONT face=Arial><SPAN
class=EC_913543811-05072008>Boas</SPAN></FONT></DIV>
<DIV><FONT face=Arial><SPAN class=EC_913543811-05072008>Caros colegas, que
cuidados devemos ter na escolha de condensadores para RF, para alem da
capacidade e tensão de trabalho?</SPAN></FONT></DIV>
<DIV><FONT face=Arial><SPAN class=EC_913543811-05072008>A escolha da tensão
para um condensador a aplicar num circuito, na pràtica como é feita (por
ex: Z alto = U alto)?</SPAN></FONT></DIV>
<DIV><SPAN class=EC_913543811-05072008><FONT face=Arial>Se calhar a pergunta
não tem sentido, mas com<SPAN class=EC_304490312-05072008>o
</SPAN>fico <SPAN class=EC_304490312-05072008>com
a</SPAN> "cabeça andar à roda" quando tenho que escolher um
condensador<SPAN class=EC_304490312-05072008>, resolvi
faze-la.</SPAN></FONT></SPAN></DIV>
<DIV><FONT face=Arial><SPAN
class=EC_913543811-05072008></SPAN></FONT> </DIV>
<DIV><SPAN class=EC_913543811-05072008>
<DIV align=left><FONT face=Arial>73 CT1HIX
Gomes</FONT></DIV></SPAN></DIV></DIV><BR>
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