My projects

<body topmargin=0 leftmargin=0 marginheight=0 marginwidth=0> <table cellpadding=0 cellspacing=0 border=0 height="100%"><tr> <td valign="top" width=210 BGCOLOR="#000000" TEXT="#F7F7FF"> <div> <B><IMG SRC="061a87e0.jpg" border=0 width="168" height="126" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"></B></div> <div> <B><IMG SRC="062a9270.jpg" border=0 width="169" height="39" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"></B></div> <div> <I><U> <script language="JavaScript" src="http://ccgi.richardbrunton.plus.com/feed/feed2js.php?src=http%3A%2F%2Fwww.southgatearc.org%2Fsarc.rss&num=10&targ=y" type="text/javascript"></script> <noscript> <a href="http://ccgi.richardbrunton.plus.com/feed/feed2js.php?src=http%3A%2F%2Fwww.southgatearc.org%2Fsarc.rss&num=10&targ=y&html=y">View RSS feed</a> </noscript>  </U></I></div> </td> <td valign="top" width="100%" BGCOLOR="#000000" TEXT="#F7F7FF"> <div> <IMG SRC="03fdd520.jpg" border=0 width="477" height="82" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"></div> <bR> <div> <A HREF="index.htm" TARGET="_top" TITLE="Amateurwireless.org.uk"><I><B>Home</B></I></A><FONT SIZE="2" COLOR="#FFFFFF" FACE="Symbol" ><I><B>   ·   </B></I></FONT><A HREF="licence.htm" TARGET="_top" TITLE="transmitting licence"><I><B>Licence</B></I></A><FONT SIZE="2" COLOR="#FFFFFF" FACE="Symbol" ><I><B>   ·   </B></I></FONT><A HREF="contesting.htm" TARGET="_top" TITLE="contesting"><I><B>Contesting</B></I></A><FONT SIZE="2" COLOR="#FFFFFF" FACE="Symbol" ><I><B>   ·   </B></I></FONT><A HREF="dx.htm" TARGET="_top" TITLE="DX"><I><B>DX</B></I></A><FONT SIZE="2" COLOR="#FFFFFF" FACE="Symbol" ><I><B>   ·   </B></I></FONT><A HREF="awards.htm" TARGET="_top" TITLE="awards"><I><B>Awards</B></I></A><FONT SIZE="2" COLOR="#FFFFFF" FACE="Symbol" ><I><B>   ·   </B></I></FONT><I><B>Projects</B></I><FONT SIZE="2" COLOR="#FFFFFF" FACE="Symbol" ><I><B>   ·   </B></I></FONT><A HREF="data_modes.htm" TARGET="_top" TITLE="data modes"><I><B>Data modes</B></I></A><FONT SIZE="2" COLOR="#FFFFFF" FACE="Symbol" ><I><B>   ·   </B></I></FONT><A HREF="satellites.htm" TARGET="_top" TITLE="Satellite"><I><B>Satellites</B></I></A><FONT SIZE="2" COLOR="#FFFFFF" FACE="Symbol" ><I><B>   ·   </B></I></FONT><A HREF="propagation.htm" TARGET="_top" TITLE="propagation"><I><B>Propagation</B></I></A><FONT SIZE="2" COLOR="#FFFFFF" FACE="Symbol" ><I><B>   ·   </B></I></FONT><A HREF="live_dsstv.htm" TARGET="_top" TITLE="Live DSSTV"><I><B>Live DSSTV</B></I></A><FONT SIZE="2" COLOR="#FFFFFF" FACE="Symbol" ><I><B>   ·   </B></I></FONT><A HREF="live_sstv.htm" TARGET="_top" TITLE="Live SSTV"><I><B>Live SSTV</B></I></A><FONT SIZE="2" COLOR="#FFFFFF" FACE="Symbol" ><I><B>   ·   </B></I></FONT><A HREF="log.htm" TARGET="_top" TITLE="LOG"><I><B>Log</B></I></A><FONT SIZE="2" COLOR="#FFFFFF" FACE="Symbol" ><I><B>   ·   </B></I></FONT><A HREF="software.htm" TARGET="_top" TITLE="Software"><I><B>Software</B></I></A><FONT SIZE="2" COLOR="#FFFFFF" FACE="Symbol" ><I><B>   ·   </B></I></FONT><A HREF="astronomy.htm" TARGET="_top" TITLE="Astronomy"><I><B>Astronomy</B></I></A><FONT SIZE="2" COLOR="#FFFFFF" FACE="Symbol" ><I><B>   ·   </B></I></FONT><A HREF="storms.htm" TARGET="_top" TITLE="Storms"><I><B>Storms</B></I></A><FONT SIZE="2" COLOR="#FFFFFF" FACE="Symbol" ><I><B>   ·   </B></I></FONT><A HREF="sstv_chat.htm" TARGET="_top" TITLE="SSTV chat"><I><B>SSTV chat</B></I></A><FONT SIZE="2" COLOR="#FFFFFF" FACE="Symbol" ><I><B>   ·   </B></I></FONT><A HREF="2e0sfc.htm" TARGET="_top" TITLE="2E0SFC"><I><B>2E0SFC</B></I></A><FONT SIZE="2" COLOR="#FFFFFF" FACE="Symbol" ><I><B>   ·   </B></I></FONT><A HREF="wx_images.htm" TARGET="_top" TITLE="WX Images"><I><B>WX Images</B></I></A><FONT SIZE="2" COLOR="#FFFFFF" FACE="Symbol" ><I><B>   ·   </B></I></FONT><A HREF="qsl_cards.htm" TARGET="_top" TITLE="Qsl cards"><I><B>Qsl cards</B></I></A></div> <bR> <bR> <bR> <div> <I><B><U> <I><B><U><SCRIPT Language="JavaScript">  </SCRIPT></U></B></I></div>  </U></B></I></div> <bR> <bR> <div> <I><B><U>QRP taped dummyload</U></B></I></div> <bR> <div> <I>This is a small qrp dummy load for up to no more than 5 watts, It has a tap out for taking RF measurements.</I></div> <bR> <div> <I><IMG SRC="13f56260.png" border=0 width="598" height="294" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"></I></div> <bR> <bR> <bR> <bR> <div> <I><B><U>The IOio satellite antenna.</U></B></I></div> <bR> <bR> <bR> <div> <I>This is my current project, I have become very interested in trying to work amateur radio satellites so I have set about building an IOio antenna to help archive this,</I></div> <div> <I>The IOio satellite antenna is shown here </I><A HREF="http://personales.ya.com/ea4cax/paginaea4cyq/Antenaioio/ioioingles.pdf" TARGET="_top" TITLE="http://personales.ya.com/ea4cax/paginaea"><I>ioioingles.pdf</I></A><I>  . So far I have only used this antenna for receiving, but it has been very successful. I hope to start working satellites very soon with this antenna, I will of course post my results in due course.</I></div> <bR> <bR> <bR> <div> <I>This is my experimental IOio antenna. I used 32mm waste pipe and tig welding wire with mini8 coaxial cable for this one, so far I'm very impressed with this design and will be making a good version soon.</I></div> <bR> <bR> <bR> <div> <I><IMG SRC="0ae23db0.jpg" border=0 width="291" height="219" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"></I></div> <bR> <bR> <bR> <bR> <div> <I><B><U>The QFH WXsat Antenna.</U></B></I></div> <bR> <bR> <bR> <bR> <div> <I><IMG SRC="0af5e8c0.png" border=0 width="94" height="140" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"></I></div> <bR> <bR> <bR> <bR> <div> <I>Ok so I wanted to decode APT images from the NOAA satellites, So I set about building a Quadrifilar helix (QFH) antenna for the 137MHz band.</I></div> <div> <I>The signals from the NOAA weather satellites are transmitted with right-hand circular polarization.</I></div> <div> <I>The antenna should be positioned with a clear aspect to all horizons. If roof-mounted, make certain that no metal objects are likely to come between it and the satellites. Ideally, it should be the topmost structure on any antenna mast. If you cannot roof-mount your antenna, good results are still possible so long as there are no obstructions nearby.</I></div> <bR> <bR> <bR> <div> <I><IMG SRC="0b00e7e0.jpg" border=0 width="526" height="382" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"></I></div> <bR> <bR> <bR> <bR> <div> <I>To build the frame of this antenna I used 32mm plumbers waste pipe from any good DIY shop, For the elements I have used RG58 coaxial cable, This antenna gives a much improved signal over the turnstile antenna. It is fed using RG213 coaxial cable and so far I am getting some nice images, however I do have a QRM problem with the 137 MHz band so when I manage to solve this I will be posting regular images to the site.</I></div> <bR> <bR> <bR> <bR> <div> <I><B><U>LOFT ANTENNA FOR TOPBAND.</U></B></I></div> <bR> <bR> <bR> <bR> <div> <I>This idea may sound a little strange due to the space required for an efficient 160m antenna, however I have limited space and I really wanted to try topband for some local nets, so I managed to find an article on the net about small antennas, I then stumbled across this antenna. I am not 100% sure so my deepest apologies if this is incorrect but I think the original idea came from John Heys (G3BDQ).</I></div> <div> <I>Ok so this antenna is a short loaded vertical, The loading coil is wound using 57m (190feet) of PVC-insulated 'bell wire' along a 21mm diameter plastic tube.</I></div> <div> <I>The winding will take up about 1.2m (4feet) of the tube and should be 800 turns.</I></div> <div> <I>Then three 6m(20feet) wires connect to the top of the coil and run out to tie points in the loft. These wires are not critical in length they may be longer or shorter depending on space, but they are needed as top-capacitance loading of the system. They do not radiate.</I></div> <div> <I>The coil is tied to the highest point just below the roof ridge and a wire soldered to it's lower end passes down into the shack and connected to an ATU.</I></div> <bR> <bR> <div> <I><IMG SRC="0b14b6f0.png" border=0 width="587" height="367" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"></I></div> <bR> <bR> <div> <I>I have found this antenna to work very very well on groundwave for "inter G" work, however I have also worked east coast USA once and Italy and Spain using this antenna, The ATU will tune this antenna to 1:1.1 vswr and I find it also has a very nice signal to noise ratio across the band, It is of course not a DX antenna but it is a good fun antenna for groundwave work.</I></div> <bR> <bR> <bR> <bR> <bR> <bR> <bR> <div>  <a href="http://s05.flagcounter.com/more/1U"><img src="http://s05.flagcounter.com/count/1U/bg=000000/txt=FFFFFF/border=1B0AFF/columns=8/maxflags=248/viewers=0/labels=1/" alt="free counters" border="0"></a>  </div> </td> </tr></table></body>