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</o:shapelayout></xml><![endif]--></head><body lang=PT link=blue vlink=purple><div class=WordSection1><div><div><div><div><div><div><div><p class=MsoNormal><b><span style='color:#1F497D'>Olá Luis,<o:p></o:p></span></b></p><p class=MsoNormal><b><span style='font-family:"Calibri","sans-serif";color:#1F497D'>este produto usa estes<o:p></o:p></span></b></p><p class=MsoNormal><span style='font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><b><span style='font-size:18.0pt;font-family:"Helvetica","sans-serif";color:black;border:none windowtext 1.0pt;padding:0cm;background:gainsboro'>Polyvaricon, 266pF X 2 and 20pF X 2, Dual Gang AM/FM Variable Capacitor<br><br></span></b><span style='font-size:13.5pt;font-family:"Arial","sans-serif";color:black;border:none windowtext 1.0pt;padding:0cm;background:gainsboro'>This is one item<span class=apple-converted-space> </span>of new variable capacitor<span class=apple-converted-space> </span>comprising two 266pF AM sections and two 20pF FM sections. All the sections can be connected together if required to create 572pF in total for receiving loop antennas or for a crystal set tuning capacitor which calls up 500pF. The matching 266pF sections allow use in low power Z-match type antenna matching circuits.<span class=apple-converted-space> </span></span><span style='font-size:13.5pt;font-family:"Helvetica","sans-serif";color:black;border:none windowtext 1.0pt;padding:0cm;background:gainsboro'><br><br></span><span style='font-size:13.5pt;font-family:"Arial","sans-serif";color:black;border:none windowtext 1.0pt;padding:0cm;background:gainsboro'>Two M2.5 screws are included for panel mounting along with two loose nuts which allow for spacing behind thin panels. The mounting screws must not go into the body too far or the FM capacitor sections will be damaged. There is also a shaft extension included which is secured onto the shaft with another M2.5 bolt. This is a simple 6mm diameter polystyrene spacer which works really well as a shaft extension and allows the use of standard grub screw knobs<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:13.5pt;font-family:"Helvetica","sans-serif";color:black;border:none windowtext 1.0pt;padding:0cm;background:gainsboro'><br></span><span style='font-size:13.5pt;font-family:"Arial","sans-serif";color:black;border:none windowtext 1.0pt;padding:0cm;background:gainsboro'>The trimmer capacitors C1 to C4 on the rear measure about 15pF maximum. These C1 and C2 are internally connected across the two FM sections but C3 and C4 have separate external connections rather than internal connections to the AM sections. All the connections have long, easy to solder tabs or they can even be connected without soldering using 2A terminal block connectors. Connection diagrams are shown below.</span><span style='font-size:13.5pt;font-family:"Helvetica","sans-serif";color:black;border:none windowtext 1.0pt;padding:0cm;background:gainsboro'><br><br></span><a href="http://www.usefulcomponents.com/ebay/pictures/capacitors/vc_plastic/pvcon_266pf/pvcon_conn_fm_txt_s.jpg"><span style='font-size:13.5pt;font-family:"Helvetica","sans-serif";color:#0654BA;border:none windowtext 1.0pt;padding:0cm;background:gainsboro;text-decoration:none'><img border=0 width=314 height=255 id="Imagem_x0020_2" src="cid:image007.jpg@01D18135.60FC91F0" alt="266pF X 2 connection diagram"></span></a><a href="http://www.usefulcomponents.com/ebay/pictures/capacitors/vc_plastic/pvcon_266pf/pvcon_conn_am_txt_s.jpg"><span style='font-size:13.5pt;font-family:"Helvetica","sans-serif";color:#0654BA;border:none windowtext 1.0pt;padding:0cm;background:gainsboro;text-decoration:none'><img border=0 width=299 height=255 id="Imagem_x0020_1" src="cid:image008.jpg@01D18135.60FC91F0" alt="Dual gang equal value section polyvaricon"></span></a><span style='font-size:13.5pt;font-family:"Helvetica","sans-serif";color:black;border:none windowtext 1.0pt;padding:0cm;background:gainsboro'><br><br></span><u><span style='font-size:10.0pt;font-family:"Helvetica","sans-serif";color:black;border:none windowtext 1.0pt;padding:0cm;background:gainsboro'>Connection Diagram Key</span></u><span style='font-size:10.0pt;font-family:"Helvetica","sans-serif";color:black;border:none windowtext 1.0pt;padding:0cm;background:gainsboro'><br><br>A Common (GND)<br>B VC1, 20pF + C1 15pF trimmer, FM<br>C Common (GND)<br>D <span class=apple-converted-space> </span>VC2, 20pF + C2 15pF trimmer, FM</span><span style='font-size:10.0pt;font-family:"Helvetica","sans-serif";color:black'><br></span><span style='font-size:10.0pt;font-family:"Helvetica","sans-serif";color:black;border:none windowtext 1.0pt;padding:0cm;background:gainsboro'>E VC4, 266pF, AM<br>F VC3, 266pF, AM<br>G C4, 15pF trimmer<br>H Common (GND)<br>I C3, 15pF trimmer<br><br><u>Headline Specs</u><br><br>Maximum voltage: 100V d.c.<br>Mounting bolts: M2.5, 6mm length provided<br>Mounting bolt separation: 14mm<br>Shaft securing bolt: M2.5, 15mm length provided<br>Overall box dimensions: 22 x 22 x 17mm<br>Height inc shaft: 21mm<br>Shaft length: 4mm normal, 16.5mm with extension<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Helvetica","sans-serif";color:black;border:none windowtext 1.0pt;padding:0cm;background:gainsboro'><o:p> </o:p></span></p><div style='mso-element:para-border-div;border-top:solid windowtext 1.0pt;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:none;padding:1.0pt 0cm 1.0pt 0cm'><p class=MsoNormal style='border:none;padding:0cm'><b><span style='font-size:10.0pt;font-family:"Helvetica","sans-serif";color:#1F497D;border:none windowtext 1.0pt;padding:0cm;background:gainsboro'> À venda no ebay</span></b><span style='font-size:10.0pt;font-family:"Helvetica","sans-serif";color:#1F497D;border:none windowtext 1.0pt;padding:0cm;background:gainsboro'> </span><span style='font-size:10.0pt;font-family:"Helvetica","sans-serif";color:#1F497D;border:none windowtext 1.0pt;padding:0cm;background:gainsboro'><a href="http://www.ebay.co.uk/itm/Polyvaricon-266pF-X-2-and-20pF-X-2-Dual-Gang-AM-FM-Variable-Capacitor-/111549349627?hash=item19f8dbfefb:g:MAcAAOSwAL9UjvOb">http://www.ebay.co.uk/itm/Polyvaricon-266pF-X-2-and-20pF-X-2-Dual-Gang-AM-FM-Variable-Capacitor-/111549349627?hash=item19f8dbfefb:g:MAcAAOSwAL9UjvOb</a> <o:p></o:p></span></p></div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Helvetica","sans-serif";color:#1F497D;border:none windowtext 1.0pt;padding:0cm;background:gainsboro'><o:p> </o:p></span></p><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Helvetica","sans-serif";color:#1F497D;border:none windowtext 1.0pt;padding:0cm;background:gainsboro'>Esta é a minha construção (à volta de €60)<o:p></o:p></span></b></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Helvetica","sans-serif";color:#1F497D;border:none windowtext 1.0pt;padding:0cm;background:gainsboro'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-family:"Calibri","sans-serif";color:#1F497D'><img border=0 width=514 height=386 id="Imagem_x0020_5" src="cid:image009.jpg@01D18135.60FC91F0"></span><span style='font-family:"Calibri","sans-serif";color:#1F497D'>$<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><b><span style='font-family:"Calibri","sans-serif";color:#1F497D'>deste comercial ($99 nos states)<o:p></o:p></span></b></p><p class=MsoNormal><span style='font-family:"Calibri","sans-serif";color:#1F497D'><img border=0 width=685 height=385 id="Imagem_x0020_6" src="cid:image010.jpg@01D18135.60FC91F0"></span><span style='font-family:"Calibri","sans-serif";color:#1F497D'><o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><b><span style='font-family:"Calibri","sans-serif";color:#1F497D'>Este é o esquema (repara nos condensador Poly 266pF!)<o:p></o:p></span></b></p><p class=MsoNormal><span style='font-family:"Calibri","sans-serif";color:#1F497D'><img border=0 width=1022 height=484 id="Imagem_x0020_3" src="cid:image011.jpg@01D18135.60FC91F0"></span><span style='font-family:"Calibri","sans-serif";color:#1F497D'><o:p></o:p></span></p><div><p class=MsoNormal>2016-03-18 11:50 GMT+00:00 CT2FZI IM58kr <<a href="mailto:ct2fzi@gmail.com" target="_blank">ct2fzi@gmail.com</a>>:<o:p></o:p></p><div><div><div><p class=MsoNormal>Viva,<o:p></o:p></p><div><p class=MsoNormal><br>Algum dos colegas tem um esquema/diagrama/valores dos condensadores para fazer algo do genero deste produto comercial?<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal><img border=0 width=518 height=545 id="_x0000_i1025" src="cid:image012.png@01D18135.60FC91F0" alt="Inline images 1"><o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>Basicamente fuciona - dependendo do comprimento do loop - entre os 40 e 10m, com 75% de 1/4 de onda da frequencia que queremos trabalhar.<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>Tirando algumas consideracoes mecanicas e os valores/tipos dos condensadores nao vejo nada complicado de reproduzir...<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>CT1BAT, havera alguma coisa aí no arquivo?<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>Obrigado!<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal><br clear=all><o:p></o:p></p><div><div><div><div><div><div><div><div><div><div><p class=MsoNormal><br><br>73 de Luis, CT2FZI<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><p class=MsoNormal><a href="http://www.ct2fzi.net" target="_blank">http://www.ct2fzi.net</a><o:p></o:p></p><div><p class=MsoNormal align=center style='text-align:center'><a href="http://goog_717545661" target="_blank"><br></a> <o:p></o:p></p></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div><p class=MsoNormal><o:p> </o:p></p></div></div>
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