Pelo que vejo na foto, deve ter umas 12 para 14 espiras.<div>é suficiente para suprimir qualquer frequência acima de 14Mhz, mas abaixo, ponho dúvidas.</div><div>Não perde nada em fazer um teste com o dobro da indutância.</div>
<div>Se lhe for possível, faça o teste.</div><div>Bom fim-de-semana.</div><div><br></div><div>Matias</div><div>CT1FFU</div><div> </div><div><br><div class="gmail_quote">2010/11/5 ct1ewa <span dir="ltr"><<a href="mailto:ct1ewa@gmail.com">ct1ewa@gmail.com</a>></span><br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
<div lang="PT" link="blue" vlink="purple">
<div>
<p class="MsoNormal"><span style="color:#1F497D">Boa noite Matias</span></p>
<p class="MsoNormal"><span style="color:#1F497D">Pelo que li em alguns artigos eles aconselhavam que a medida do
cabo usado nas espiras fosse de 6,40m e foi isso que fiz.</span></p>
<p class="MsoNormal"><span style="color:#1F497D">Acha que devo ultrapassar este medida e juntar mais umas quantas
espiras?</span></p><div class="im">
<p class="MsoNormal"><span style="color:#1F497D">73’s</span></p>
<p class="MsoNormal"><span style="color:#1F497D"> </span></p>
<p class="MsoNormal"><b><span style="color:#1F497D">CT1EWA - Paulo Santos</span></b><span style="color:#1F497D"></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Apartado 415</span></p>
<p class="MsoNormal"><span style="color:#1F497D">2430-905 Marinha Grande, Portugal</span></p>
<p class="MsoNormal"><b><span style="font-size:10.0pt;color:#3208A8">QTH Locator : IM59NS </span></b></p>
<p class="MsoNormal"><b><span style="font-size:10.0pt;color:#3208A8">CQ Zone: 14 / ITU Zone: 37</span></b></p>
<p class="MsoNormal"><b><u><span style="font-size:10.0pt;color:#3208A8">ARAL#37, ODXG-Founder member, EPC#5619 / PT10, 30MDG#1693,
REP#995</span></u></b></p>
<p class="MsoNormal"><span style="color:#1F497D"> </span></p>
</div><div style="border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm">
<p class="MsoNormal"><b><span style="font-size:10.0pt">De:</span></b><span style="font-size:10.0pt">
<a href="mailto:cluster-bounces@radio-amador.net" target="_blank">cluster-bounces@radio-amador.net</a> [mailto:<a href="mailto:cluster-bounces@radio-amador.net" target="_blank">cluster-bounces@radio-amador.net</a>] <b>Em
nome de </b>Antonio Matias<br>
<b>Enviada:</b> sexta-feira, 5 de Novembro de 2010 20:32</span></p><div class="im"><br>
<b>Para:</b> Resumo Noticioso Electrónico ARLA<br>
<b>Assunto:</b> Re: ARLA/CLUSTER: "Balun Feio"</div><p></p>
</div>
<p class="MsoNormal"> </p>
<p class="MsoNormal">Boas.</p><div><div></div><div class="h5">
<div>
<p class="MsoNormal">Tem de ver se ainda persiste RF no cabo coaxial.</p>
</div>
<div>
<p class="MsoNormal">Muito TVi é provocado pela radiação do cabo dentro de casa.</p>
</div>
<div>
<p class="MsoNormal">Pelas fotos que vi, o choke para ter mais eficiência
nas low-band deveria ser bem maior.</p>
</div>
<div>
<p class="MsoNormal">Digamos que umas 30 espiras, nunca serão demais.</p>
</div>
<div>
<p class="MsoNormal">Pode começar por aqui, aumente-o ou adicione uma Ferrites de
RFI ao cabo, e veja se melhora.</p>
</div>
<div>
<p class="MsoNormal"> </p>
</div>
<div>
<p class="MsoNormal">Tudo mais, configuração, SWR e montagem parecem boas.</p>
</div>
<div>
<p class="MsoNormal"> </p>
</div>
<div>
<p class="MsoNormal">73</p>
</div>
<div>
<p class="MsoNormal">Matias</p>
</div>
<div>
<p class="MsoNormal" style="margin-bottom:12.0pt">CT1FFU </p>
<div>
<p class="MsoNormal">2010/11/5 ct1ewa <<a href="mailto:ct1ewa@gmail.com" target="_blank">ct1ewa@gmail.com</a>></p>
<div>
<div>
<p class="MsoNormal">Boa
noite colegas</p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">Venho
por este meio apresentar os resultados que obtive com a minha long-wire,
construída com um balun 1/9 e um “balun feio”.</p>
<p class="MsoNormal">Alterei
o comprimento do fio para 30M e coloquei a antena em V invertido, ou seja,
tenho o balun a uns 3m do solo, o fio vai à torre a 15m de altura e desce para
ser amarrado igualmente a uns 3m do solo. Na torre o fio fará um ângulo de
30º.</p>
<p class="MsoNormal">Com
esta montagem obtive os seguintes resultados:</p>
<p class="MsoNormal"> </p>
<p><span style="font-family:Symbol">·</span><span style="font-size:7.0pt">
</span><b><u>Com o balun sem ligação terra</u></b></p>
<p> </p>
<p> </p>
<table border="0" cellspacing="0" cellpadding="0" style="margin-left:36.0pt;border-collapse:collapse">
<tbody><tr>
<td width="131" valign="top" style="width:98.55pt;border:solid windowtext 1.0pt;padding:0cm 5.4pt 0cm 5.4pt">
<p>FREQ</p>
</td>
<td width="104" valign="top" style="width:77.95pt;border:solid windowtext 1.0pt;border-left:none;padding:0cm 5.4pt 0cm 5.4pt">
<p>SWR</p>
</td>
<td width="104" valign="top" style="width:77.95pt;border:solid windowtext 1.0pt;border-left:none;padding:0cm 5.4pt 0cm 5.4pt">
<p> TVi</p>
</td>
</tr>
<tr>
<td width="131" valign="top" style="width:98.55pt;border:solid windowtext 1.0pt;border-top:none;padding:0cm 5.4pt 0cm 5.4pt">
<p>28.500</p>
</td>
<td width="104" valign="top" style="width:77.95pt;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0cm 5.4pt 0cm 5.4pt">
<p>1,1</p>
</td>
<td width="104" valign="top" style="width:77.95pt;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0cm 5.4pt 0cm 5.4pt">
<p>não</p>
</td>
</tr>
<tr>
<td width="131" valign="top" style="width:98.55pt;border:solid windowtext 1.0pt;border-top:none;padding:0cm 5.4pt 0cm 5.4pt">
<p>24.980</p>
</td>
<td width="104" valign="top" style="width:77.95pt;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0cm 5.4pt 0cm 5.4pt">
<p>2,5</p>
</td>
<td width="104" valign="top" style="width:77.95pt;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0cm 5.4pt 0cm 5.4pt">
<p>não</p>
</td>
</tr>
<tr>
<td width="131" valign="top" style="width:98.55pt;border:solid windowtext 1.0pt;border-top:none;padding:0cm 5.4pt 0cm 5.4pt">
<p>21.200</p>
</td>
<td width="104" valign="top" style="width:77.95pt;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0cm 5.4pt 0cm 5.4pt">
<p>2,5</p>
</td>
<td width="104" valign="top" style="width:77.95pt;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0cm 5.4pt 0cm 5.4pt">
<p>não</p>
</td>
</tr>
<tr>
<td width="131" valign="top" style="width:98.55pt;border:solid windowtext 1.0pt;border-top:none;padding:0cm 5.4pt 0cm 5.4pt">
<p>18.140</p>
</td>
<td width="104" valign="top" style="width:77.95pt;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0cm 5.4pt 0cm 5.4pt">
<p>1,2</p>
</td>
<td width="104" valign="top" style="width:77.95pt;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0cm 5.4pt 0cm 5.4pt">
<p>não</p>
</td>
</tr>
<tr>
<td width="131" valign="top" style="width:98.55pt;border:solid windowtext 1.0pt;border-top:none;padding:0cm 5.4pt 0cm 5.4pt">
<p>14.260</p>
</td>
<td width="104" valign="top" style="width:77.95pt;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0cm 5.4pt 0cm 5.4pt">
<p>2,3</p>
</td>
<td width="104" valign="top" style="width:77.95pt;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0cm 5.4pt 0cm 5.4pt">
<p>não</p>
</td>
</tr>
<tr>
<td width="131" valign="top" style="width:98.55pt;border:solid windowtext 1.0pt;border-top:none;padding:0cm 5.4pt 0cm 5.4pt">
<p>10.140</p>
</td>
<td width="104" valign="top" style="width:77.95pt;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0cm 5.4pt 0cm 5.4pt">
<p>1,9</p>
</td>
<td width="104" valign="top" style="width:77.95pt;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0cm 5.4pt 0cm 5.4pt">
<p>não</p>
</td>
</tr>
<tr>
<td width="131" valign="top" style="width:98.55pt;border:solid windowtext 1.0pt;border-top:none;padding:0cm 5.4pt 0cm 5.4pt">
<p>7.100</p>
</td>
<td width="104" valign="top" style="width:77.95pt;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0cm 5.4pt 0cm 5.4pt">
<p>3,2</p>
</td>
<td width="104" valign="top" style="width:77.95pt;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0cm 5.4pt 0cm 5.4pt">
<p>não</p>
</td>
</tr>
<tr>
<td width="131" valign="top" style="width:98.55pt;border:solid windowtext 1.0pt;border-top:none;padding:0cm 5.4pt 0cm 5.4pt">
<p>3.780</p>
</td>
<td width="104" valign="top" style="width:77.95pt;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0cm 5.4pt 0cm 5.4pt">
<p>1,1</p>
</td>
<td width="104" valign="top" style="width:77.95pt;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0cm 5.4pt 0cm 5.4pt">
<p>Bastante interf.</p>
</td>
</tr>
<tr>
<td width="131" valign="top" style="width:98.55pt;border:solid windowtext 1.0pt;border-top:none;padding:0cm 5.4pt 0cm 5.4pt">
<p>1.840</p>
</td>
<td width="104" valign="top" style="width:77.95pt;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0cm 5.4pt 0cm 5.4pt">
<p>1,8</p>
</td>
<td width="104" valign="top" style="width:77.95pt;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0cm 5.4pt 0cm 5.4pt">
<p>Bastante interf</p>
</td>
</tr>
</tbody></table>
<p class="MsoNormal"> </p>
<p><span style="font-family:Symbol">·</span><span style="font-size:7.0pt">
</span>Balun com ligação a terra, com 2 piquetes de 1,5M</p>
<p class="MsoNormal" style="margin-left:18.0pt"> </p>
<table border="0" cellspacing="0" cellpadding="0" style="margin-left:36.0pt;border-collapse:collapse">
<tbody><tr>
<td width="131" valign="top" style="width:98.55pt;border:solid windowtext 1.0pt;padding:0cm 5.4pt 0cm 5.4pt">
<p>FREQ</p>
</td>
<td width="104" valign="top" style="width:77.95pt;border:solid windowtext 1.0pt;border-left:none;padding:0cm 5.4pt 0cm 5.4pt">
<p>SWR</p>
</td>
<td width="104" valign="top" style="width:77.95pt;border:solid windowtext 1.0pt;border-left:none;padding:0cm 5.4pt 0cm 5.4pt">
<p> TVi</p>
</td>
</tr>
<tr>
<td width="131" valign="top" style="width:98.55pt;border:solid windowtext 1.0pt;border-top:none;padding:0cm 5.4pt 0cm 5.4pt">
<p>28.500</p>
</td>
<td width="104" valign="top" style="width:77.95pt;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0cm 5.4pt 0cm 5.4pt">
<p>1,3</p>
</td>
<td width="104" valign="top" style="width:77.95pt;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0cm 5.4pt 0cm 5.4pt">
<p>não</p>
</td>
</tr>
<tr>
<td width="131" valign="top" style="width:98.55pt;border:solid windowtext 1.0pt;border-top:none;padding:0cm 5.4pt 0cm 5.4pt">
<p>24.980</p>
</td>
<td width="104" valign="top" style="width:77.95pt;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0cm 5.4pt 0cm 5.4pt">
<p>1,9</p>
</td>
<td width="104" valign="top" style="width:77.95pt;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0cm 5.4pt 0cm 5.4pt">
<p>não</p>
</td>
</tr>
<tr>
<td width="131" valign="top" style="width:98.55pt;border:solid windowtext 1.0pt;border-top:none;padding:0cm 5.4pt 0cm 5.4pt">
<p>21.200</p>
</td>
<td width="104" valign="top" style="width:77.95pt;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0cm 5.4pt 0cm 5.4pt">
<p>2,1</p>
</td>
<td width="104" valign="top" style="width:77.95pt;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0cm 5.4pt 0cm 5.4pt">
<p>não</p>
</td>
</tr>
<tr>
<td width="131" valign="top" style="width:98.55pt;border:solid windowtext 1.0pt;border-top:none;padding:0cm 5.4pt 0cm 5.4pt">
<p>18.140</p>
</td>
<td width="104" valign="top" style="width:77.95pt;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0cm 5.4pt 0cm 5.4pt">
<p>1,6</p>
</td>
<td width="104" valign="top" style="width:77.95pt;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0cm 5.4pt 0cm 5.4pt">
<p>não</p>
</td>
</tr>
<tr>
<td width="131" valign="top" style="width:98.55pt;border:solid windowtext 1.0pt;border-top:none;padding:0cm 5.4pt 0cm 5.4pt">
<p>14.260</p>
</td>
<td width="104" valign="top" style="width:77.95pt;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0cm 5.4pt 0cm 5.4pt">
<p>2,8</p>
</td>
<td width="104" valign="top" style="width:77.95pt;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0cm 5.4pt 0cm 5.4pt">
<p>não</p>
</td>
</tr>
<tr>
<td width="131" valign="top" style="width:98.55pt;border:solid windowtext 1.0pt;border-top:none;padding:0cm 5.4pt 0cm 5.4pt">
<p>10.140</p>
</td>
<td width="104" valign="top" style="width:77.95pt;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0cm 5.4pt 0cm 5.4pt">
<p>1,5</p>
</td>
<td width="104" valign="top" style="width:77.95pt;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0cm 5.4pt 0cm 5.4pt">
<p>não</p>
</td>
</tr>
<tr>
<td width="131" valign="top" style="width:98.55pt;border:solid windowtext 1.0pt;border-top:none;padding:0cm 5.4pt 0cm 5.4pt">
<p>7.100</p>
</td>
<td width="104" valign="top" style="width:77.95pt;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0cm 5.4pt 0cm 5.4pt">
<p>2</p>
</td>
<td width="104" valign="top" style="width:77.95pt;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0cm 5.4pt 0cm 5.4pt">
<p>não</p>
</td>
</tr>
<tr>
<td width="131" valign="top" style="width:98.55pt;border:solid windowtext 1.0pt;border-top:none;padding:0cm 5.4pt 0cm 5.4pt">
<p>3.780</p>
</td>
<td width="104" valign="top" style="width:77.95pt;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0cm 5.4pt 0cm 5.4pt">
<p>6</p>
</td>
<td width="104" valign="top" style="width:77.95pt;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0cm 5.4pt 0cm 5.4pt">
<p>Ligeira interf..</p>
</td>
</tr>
<tr>
<td width="131" valign="top" style="width:98.55pt;border:solid windowtext 1.0pt;border-top:none;padding:0cm 5.4pt 0cm 5.4pt">
<p>1.840</p>
</td>
<td width="104" valign="top" style="width:77.95pt;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0cm 5.4pt 0cm 5.4pt">
<p>5</p>
</td>
<td width="104" valign="top" style="width:77.95pt;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0cm 5.4pt 0cm 5.4pt">
<p>Ligeira interf</p>
</td>
</tr>
</tbody></table>
<p class="MsoNormal"> </p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">Tendo
em conta os resultados, que não são animadores nos 80m e nos 160M qual a
opinião dos colegas para melhorar esta instalação.</p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">73’s</p>
<div>
<div>
<p class="MsoNormal"><b><span style="color:#1F497D">CT1EWA - Paulo Santos</span></b></p>
<p class="MsoNormal"><span style="color:#1F497D">Apartado 415</span></p>
<p class="MsoNormal"><span style="color:#1F497D">2430-905 Marinha Grande, Portugal</span></p>
<p class="MsoNormal"><b><span style="font-size:10.0pt;color:#3208A8">QTH Locator :
IM59NS
</span></b></p>
<p class="MsoNormal"><b><span style="font-size:10.0pt;color:#3208A8">CQ Zone: 14 / ITU Zone: 37</span></b></p>
<p class="MsoNormal"><b><u><span style="font-size:10.0pt;color:#3208A8">ARAL#37, ODXG-Founder member, EPC#5619 /
PT10, 30MDG#1693, REP#995</span></u></b></p>
</div>
</div>
</div>
</div>
<p class="MsoNormal" style="margin-bottom:12.0pt"><br>
_______________________________________________<br>
CLUSTER mailing list<br>
<a href="mailto:CLUSTER@radio-amador.net" target="_blank">CLUSTER@radio-amador.net</a><br>
<a href="http://radio-amador.net/cgi-bin/mailman/listinfo/cluster" target="_blank">http://radio-amador.net/cgi-bin/mailman/listinfo/cluster</a></p>
</div>
<p class="MsoNormal"> </p>
</div>
</div></div></div>
</div>
<br>_______________________________________________<br>
CLUSTER mailing list<br>
<a href="mailto:CLUSTER@radio-amador.net">CLUSTER@radio-amador.net</a><br>
<a href="http://radio-amador.net/cgi-bin/mailman/listinfo/cluster" target="_blank">http://radio-amador.net/cgi-bin/mailman/listinfo/cluster</a><br>
<br></blockquote></div><br></div>