<div dir="ltr"><br><div class="gmail_quote">---------- Mensagem encaminhada ----------<br>De: <b class="gmail_sendername">Carlos Gorjao</b> <span dir="ltr"><<a href="mailto:gorjowski@gmail.com">gorjowski@gmail.com</a>></span><br>Data: 6 de dezembro de 2017 às 10:00<br>Assunto: [CT-Com. & Tec.] QSO CT / OZ1 via lua ontem à noite !!! Factores determinantes ... o radiometro do Luis, CT1DMK e o meu amigo Peter, OZ1LPR<br>Para: CT-Comunicações e Tecnologias <<a href="mailto:ct-comunicacoes-e-tecnologias@googlegroups.com">ct-comunicacoes-e-tecnologias@googlegroups.com</a>><br><br><br><div dir="ltr"><div class="m_-5335569245053488991gE m_-5335569245053488991iv m_-5335569245053488991gt" style="padding-top:12px;padding-bottom:3px;font-size:12.8px;font-family:arial,sans-serif"><table cellpadding="0" class="m_-5335569245053488991cf m_-5335569245053488991gJ" style="border-collapse:collapse;width:auto"><tbody><tr class="m_-5335569245053488991acZ" style="height:16px"><td class="m_-5335569245053488991gF m_-5335569245053488991gK" style="white-space:nowrap;padding-right:8px;vertical-align:top;width:819px"><table cellpadding="0" class="m_-5335569245053488991cf m_-5335569245053488991ix" style="border-collapse:collapse;table-layout:fixed;width:819px"><tbody><tr><td><h3 class="m_-5335569245053488991iw" style="overflow:hidden;max-width:92%;display:inline-block;font-size:inherit;font-weight:inherit;margin:inherit"><span name="Hansen Peter" class="m_-5335569245053488991gD" style="font-size:12.8px;font-weight:bold;display:inline;vertical-align:top">Hansen Peter</span> <span class="m_-5335569245053488991go" style="vertical-align:top;color:rgb(85,85,85)"><span><</span><a href="mailto:peter.hansen@dk.saabgroup.com" target="_blank">peter.hansen@dk.<wbr>saabgroup.com</a><span>></span></span></h3></td></tr></tbody></table></td><td class="m_-5335569245053488991gH" style="text-align:right;white-space:nowrap;vertical-align:top"><div class="m_-5335569245053488991gK" style="padding-right:2px"><span id="m_-5335569245053488991:1hh" class="m_-5335569245053488991g3" title="Wed, Dec 6, 2017 at 7:19 AM" alt="Wed, Dec 6, 2017 at 7:19 AM" style="vertical-align:top;margin-right:3px">7:19 AM (1 hour ago)</span><div class="m_-5335569245053488991zd m_-5335569245053488991bi4" 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no-repeat;height:15px;margin-right:8px;margin-left:8px;opacity:0.4;width:14px"></div></div><div id="m_-5335569245053488991:1j6" class="m_-5335569245053488991J-JN-M-I m_-5335569245053488991J-J5-Ji m_-5335569245053488991S7 m_-5335569245053488991L3" style="display:inline-block;font-size:13px;margin-top:1px;min-width:54px;outline:0px;padding-top:1px;padding-right:8px;padding-left:8px;vertical-align:top"><div class="m_-5335569245053488991J-J5-Ji m_-5335569245053488991J-JN-M-I-Jm" id="m_-5335569245053488991:39t" style="display:inline-block">Polish</div><div class="m_-5335569245053488991J-J5-Ji m_-5335569245053488991J-JN-M-I-JG m_-5335569245053488991adr" style="display:inline-block;background:url("") 0px 1px no-repeat;font-size:0px;height:6px;margin-left:3px;padding-bottom:3px;vertical-align:middle;width:7px"></div></div></div> <div id="m_-5335569245053488991:1j4" class="m_-5335569245053488991B9 m_-5335569245053488991J-J5-Ji" style="display:inline-block;color:rgb(17,85,204);font-size:12.8px;margin-top:2px;vertical-align:top;white-space:nowrap">Translate message</div></div><div class="m_-5335569245053488991adK" style="text-align:right;min-height:18px"><div id="m_-5335569245053488991:1f3_0en" class="m_-5335569245053488991B9 m_-5335569245053488991J-J5-Ji" style="color:rgb(17,85,204);font-size:12.8px;display:inline-block;margin-top:2px;vertical-align:top;white-space:nowrap">Turn off for: English</div><div class="m_-5335569245053488991B9 m_-5335569245053488991J-J5-Ji" style="display:inline-block;margin-top:2px;vertical-align:top"><font color="#555555" size="3">Caros </font></div></div></div></div><div id="m_-5335569245053488991:1j3" class="m_-5335569245053488991ii m_-5335569245053488991gt m_-5335569245053488991adP m_-5335569245053488991adO" style="font-size:12.8px;direction:ltr;padding-bottom:5px;font-family:arial,sans-serif"><div id="m_-5335569245053488991:1j2" class="m_-5335569245053488991a3s m_-5335569245053488991aXjCH m_-5335569245053488991m1602ab19ea5b1d26" style="overflow:hidden">Caros colegas das micro ondas</div><div id="m_-5335569245053488991:1j2" class="m_-5335569245053488991a3s m_-5335569245053488991aXjCH m_-5335569245053488991m1602ab19ea5b1d26" style="overflow:hidden"><br></div><div id="m_-5335569245053488991:1j2" class="m_-5335569245053488991a3s m_-5335569245053488991aXjCH m_-5335569245053488991m1602ab19ea5b1d26" style="overflow:hidden">Depois de mais de um ano de tentativas algumas frustradas pelo Dr. Murphy, mas que deram motivação para o prosseguimento e desenvolvimento do projecto, ontem consegui com êxito um QSO nos 10 GHz, em JT, com o colega e amigo, Peter, OZ1LPR.</div><div id="m_-5335569245053488991:1j2" class="m_-5335569245053488991a3s m_-5335569245053488991aXjCH m_-5335569245053488991m1602ab19ea5b1d26" style="overflow:hidden">Digo que o radiometro do Luis, CT1DMK, foi instrumental, pois sem ele não conseguiria apontar a antena, optimizando o ruído lunar que nos serve de "beacon" .... a pontaria automática não é suficiente nestas frequências e com o ganho duma antena de 2.4 m, como podem calcular. A lua representa um ângulo sólido de cerca de 0,5 graus .... não é fácil, para além da histerese mecânica do meu sistema de antena.</div><div id="m_-5335569245053488991:1j2" class="m_-5335569245053488991a3s m_-5335569245053488991aXjCH m_-5335569245053488991m1602ab19ea5b1d26" style="overflow:hidden">No dia anterior tive que suspender o sked dado que o radiometro não funcionava .... por minha culpa !!! bastava desligar e tornar a ligar .... esqueci-me deste procedimento crucial com as altas tecnologias !!! HiHi !!</div><div id="m_-5335569245053488991:1j2" class="m_-5335569245053488991a3s m_-5335569245053488991aXjCH m_-5335569245053488991m1602ab19ea5b1d26" style="overflow:hidden">Digo também que o Peter foi determinante .... sim porque ao longo de mais de um ano me estimulava em todos os bons ciclos lunares perguntando se já estaria QRV .... claro que um CT para ele era muito interessante ....!!!</div><div id="m_-5335569245053488991:1j2" class="m_-5335569245053488991a3s m_-5335569245053488991aXjCH m_-5335569245053488991m1602ab19ea5b1d26" style="overflow:hidden">Um QSO destes não é um acontecimento excepcional, inúmeros colegas o fazem neste planeta, o Luis nos anos 80 já o fazia curiosamente com um TWT igual ao meu .... mas para mim não foi pera doce ....</div><div id="m_-5335569245053488991:1j2" class="m_-5335569245053488991a3s m_-5335569245053488991aXjCH m_-5335569245053488991m1602ab19ea5b1d26" style="overflow:hidden">... optimizar o ruído da antena, ajustar o Doppler que é muito elevado .... isto quase 15 em 15 segundos !!! .... depois ser a primeira vez .... a ansiedade turva o racional !!!</div><div id="m_-5335569245053488991:1j2" class="m_-5335569245053488991a3s m_-5335569245053488991aXjCH m_-5335569245053488991m1602ab19ea5b1d26" style="overflow:hidden">A antena é uma offset com 2,4/2,6 m com um F/D de 0,8. Potência no feed cerca de 15 W, TWT da Siemens RW1125. LNA com 0,9 dB de NF e 20 dB de ganho.Transverter, homebuild, com FI nos 1296 MHz. Referência disciplinada por GPS.</div><div id="m_-5335569245053488991:1j2" class="m_-5335569245053488991a3s m_-5335569245053488991aXjCH m_-5335569245053488991m1602ab19ea5b1d26" style="overflow:hidden"><br></div><div id="m_-5335569245053488991:1j2" class="m_-5335569245053488991a3s m_-5335569245053488991aXjCH m_-5335569245053488991m1602ab19ea5b1d26" style="overflow:hidden">Claro que o Carlos Mourato vai dizer que isso foi de caras .... dado que a lua não tem nada em frente !!! ... ele e outros sabem disso pois passou as passas do Algarve para fazer 300 Km terrestres !!! </div><div id="m_-5335569245053488991:1j2" class="m_-5335569245053488991a3s m_-5335569245053488991aXjCH m_-5335569245053488991m1602ab19ea5b1d26" style="overflow:hidden">E o puristas vão falar do algoritmo do John Taylor .... mas curiosamente tanto eu como o Peter ouvíamos claramente o sinal ontem sem grande espalhamento.... logo poderiamos ter feito CW ... o que vai acontecer talvez esta noite. O algoritmo não é mais do que um protocolo de comunicação coerente .... que no inicio do EME era iomplementado pelos operadores ...por exemplo, tx no minuto par rx no impar .... R de Roger e O de over ... e assim se fazia um QSO com sinais fraquissimos !!! </div><div id="m_-5335569245053488991:1j2" class="m_-5335569245053488991a3s m_-5335569245053488991aXjCH m_-5335569245053488991m1602ab19ea5b1d26" style="overflow:hidden"><br></div><div id="m_-5335569245053488991:1j2" class="m_-5335569245053488991a3s m_-5335569245053488991aXjCH m_-5335569245053488991m1602ab19ea5b1d26" style="overflow:hidden">Estes são os comentários desta manhã do Peter, OZ1LPR:</div><div id="m_-5335569245053488991:1j2" class="m_-5335569245053488991a3s m_-5335569245053488991aXjCH m_-5335569245053488991m1602ab19ea5b1d26" style="overflow:hidden"><br></div><div id="m_-5335569245053488991:1j2" class="m_-5335569245053488991a3s m_-5335569245053488991aXjCH m_-5335569245053488991m1602ab19ea5b1d26" style="overflow:hidden">Hi Carlos This is my work mail so I first see it now :O).<br>The 15W was that at the feed or at the TWT output ?.<br>You need to modify your RW1127 tube. This will do 35W JT and 70-80W CW. Then your world opens up.<br>On the other hand it worked great yesterday.<br>You were 500hz to high yesterday. But that could be me as my PLL has issues.<br>You need to build a more finalized setup so it is less likely to be introduced error and that you quick can be qrv.<br>Also your RX need a little more. The 1244 dish you use is very similar to my Andrew. You should see around 1.6-1.8dB nf.<br>A good test is to take the feed point to the cold clear sky. Search for a quiet place. And set Noise meter to zero. Now point directly to ground. If your system is optimized you should get +6dB noise. I would say anything from 5-6 is good.<br>This is fairly simple test and it will see if the lower moonnoise is related to Feed placement, dish accuracy or lossy items infront of preamp.<br><br>Thanks again for qso I hope for many more.<br><br>73 peter OZ1LPR</div><div id="m_-5335569245053488991:1j2" class="m_-5335569245053488991a3s m_-5335569245053488991aXjCH m_-5335569245053488991m1602ab19ea5b1d26" style="overflow:hidden"><br></div><div id="m_-5335569245053488991:1j2" class="m_-5335569245053488991a3s m_-5335569245053488991aXjCH m_-5335569245053488991m1602ab19ea5b1d26" style="overflow:hidden">Divirtam-se !!! E obrigado por tudo e a todos que me aturam e ajudam !!</div><div id="m_-5335569245053488991:1j2" class="m_-5335569245053488991a3s m_-5335569245053488991aXjCH m_-5335569245053488991m1602ab19ea5b1d26" style="overflow:hidden"><br></div><div id="m_-5335569245053488991:1j2" class="m_-5335569245053488991a3s m_-5335569245053488991aXjCH m_-5335569245053488991m1602ab19ea5b1d26" style="overflow:hidden">73 de Carlos Gorjao</div><div id="m_-5335569245053488991:1j2" class="m_-5335569245053488991a3s m_-5335569245053488991aXjCH m_-5335569245053488991m1602ab19ea5b1d26" style="overflow:hidden">CT7AFN</div><span class="HOEnZb"><font color="#888888"><div id="m_-5335569245053488991:1j2" class="m_-5335569245053488991a3s m_-5335569245053488991aXjCH m_-5335569245053488991m1602ab19ea5b1d26" style="overflow:hidden"><br></div></font></span></div></div><span class="HOEnZb"><font color="#888888">
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