I know that the below article is written from a US perspective and that they use 144.39, but is this approach (putting the digi on an existing VHF repeater using 2 duplexers) something to consider or would it be unworkable?<div>
<br></div><div><a href="http://www.aprs.org/txt/digiduplexing.pdf">http://www.aprs.org/txt/digiduplexing.pdf</a></div><div><br><br><div class="gmail_quote">On 6 March 2013 12:43, Peter VERNON <span dir="ltr"><<a href="mailto:peter.vernon@jbo.com.au" target="_blank">peter.vernon@jbo.com.au</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div lang="EN-AU" link="blue" vlink="purple"><div><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">Pete….<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><u></u> <u></u></span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">The install images are here: <a href="http://images.jbo.com.au/gallery/main.php?g2_itemId=8029" target="_blank">http://images.jbo.com.au/gallery/main.php?g2_itemId=8029</a> <u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><u></u> <u></u></span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">And look who’s climbing the pole…..<u></u><u></u></span></p>
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<tbody><tr><td width="372" colspan="2" style="width:223.2pt;padding:0cm .5pt 0cm .5pt"><p class="MsoNormal" style="text-autospace:none"><b><span style="font-size:10.0pt;font-family:"Helvetica 35 Thin","serif";color:#336699">Peter J VERNON | VK2US<u></u><u></u></span></b></p>
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<p class="MsoNormal" style="text-autospace:none"><b><span style="font-family:"Helvetica 35 Thin","serif";color:#336699">T</span></b><span style="font-size:9.0pt;font-family:"Helvetica 35 Thin","serif";color:#336699"> 61 2 9007 0977 |</span><span style="font-family:"Helvetica 35 Thin","serif";color:#336699"> <b>F</b></span><span style="font-size:9.0pt;font-family:"Helvetica 35 Thin","serif";color:#336699"> 61 2 9007 0978 | </span><b><span style="font-family:"Helvetica 35 Thin","serif";color:#336699">M</span></b><span style="font-size:9.0pt;font-family:"Helvetica 35 Thin","serif";color:#336699"> 61 4 1115 8231 </span><span style="font-family:"Helvetica 35 Thin","serif";color:#336699"><u></u><u></u></span></p>
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<p class="MsoNormal" style="text-autospace:none"><b><span style="font-family:"Helvetica 35 Thin","serif";color:#336699">E</span></b><span style="font-size:9.0pt;font-family:"Helvetica 35 Thin","serif";color:#336699"> <a href="mailto:VK2US@jbo.com.au" target="_blank">VK2US@jbo.com.au</a> | </span><b><span style="font-family:"Helvetica 35 Thin","serif";color:#336699">W</span></b><b><span style="font-size:9.0pt;font-family:"Helvetica 35 Thin","serif";color:#336699"> </span></b><span style="color:#336699"><a href="http://www.vk2us.id.au/" target="_blank">www.vk2us.id<span style="font-size:9.0pt;font-family:"Helvetica 35 Thin","serif"">.au</span></a></span><span style="font-family:"Helvetica 35 Thin","serif";color:#336699"><u></u><u></u></span></p>
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</div><p class="MsoNormal"><b><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> <a href="mailto:ozaprs-bounces@aprs.net.au" target="_blank">ozaprs-bounces@aprs.net.au</a> [mailto:<a href="mailto:ozaprs-bounces@aprs.net.au" target="_blank">ozaprs-bounces@aprs.net.au</a>] <b>On Behalf Of </b>Peter Illmayer<br>
<b>Sent:</b> Wednesday, 6 March 2013 3:32 PM<br><b>To:</b> Australian APRS Users<br><b>Subject:</b> Re: [OZAPRS] VK2US-1 To close.......<u></u><u></u></span></p><div><div class="h5"><p class="MsoNormal"><u></u> <u></u></p>
<div><p class="MsoNormal">Pete (vk2us) where is that photo of us putting up the antenna ? Remember the FM92, we drove just over the ANZAC bridge and the thing was as deaf as a post. We put in the 828 and it could hear us out near Lithgow....!!<u></u><u></u></p>
<div><p class="MsoNormal"><u></u> <u></u></p></div><div><p class="MsoNormal">Its funny to thing that 4 bolts into a roof, a temporary concrete pad and the thing sitting ontop of a power box in a passage way could get in the way :-)..Its all about policy.....<u></u><u></u></p>
</div><div><p class="MsoNormal"><u></u> <u></u></p></div><div><p class="MsoNormal">I remember getting Colin in there with his spectrum amp to see how bad the environment was, rather ugly...<u></u><u></u></p></div><div><p class="MsoNormal">
<u></u> <u></u></p></div><div><p class="MsoNormal">Pete..vk2yx/vk8pi<u></u><u></u></p></div></div><div><p class="MsoNormal" style="margin-bottom:12.0pt"><u></u> <u></u></p><div><p class="MsoNormal">On Wed, Mar 6, 2013 at 7:42 AM, Ray Wells <<a href="mailto:vk2tv@exemail.com.au" target="_blank">vk2tv@exemail.com.au</a>> wrote:<u></u><u></u></p>
<div><div><p class="MsoNormal">Peter,<br><br>Allow me add my name the list of people thanking you for VK2US-1. Thank you.<br><br>With regard to the capability of the FM828, I'm sure many of you have seen me recommend the humble FM828 on many occasions, and with good reason. The radio might require a pair of decent crystals at a cost of about $70 but you can get the radio for free, or maybe $20. For less than $100 you have a radio that is almost bullet proof. <br>
<br>The FM828 rx has a respectably narrow front-end that was never intended to extract the last 0.1uV from the ether. It will do, typically, 0.3uV for 12dB SINAD (the spec says 0.35uV for 12dB SINAD), however, and return that performance under very hostile circumstances. Ask yourself if you want a 0.1uV rx that clams up to maybe many uV (or blocks completely) under harsh conditions, or a rx that hears 0.3uV 24/7. Standing current of the 828 is also respectably low, around 250mA when muted. If you take low level audio and keep the volume control wound right back the standing current doesn't change when a signal is received. The FM828 tx is continuously rated at full power (25W) and the unit will work over the range 10-16v. Try that with your Yaecomwood! <br>
<br>The rx in the Philips FM814 base station is directly from the FM828 mobile. Yep, Philips engineered a damn good radio with the FM828 and, that was around 1978.<br><br>Ray vk2tv<u></u><u></u></p><div><div><p class="MsoNormal">
<br><br><br>On 06/03/13 08:39, Geoff Gatward wrote:<u></u><u></u></p></div></div></div><div><div><blockquote style="margin-top:5.0pt;margin-bottom:5.0pt"><p class="MsoNormal">Peter, <u></u><u></u></p><div><p class="MsoNormal">
<u></u> <u></u></p></div><div><p class="MsoNormal">Thank you for hosting the digi for the last 10+ years - it has been fundamental to the APRS network in Sydney - in fact a large chunk of NSW! For those that are unaware, the coverage of this digi is/was phenomenal with direct paths out to Orange, Canberra and along the coast to Newcastle and beyond Wollongong.<u></u><u></u></p>
</div><div><p class="MsoNormal"><u></u> <u></u></p></div><div><p class="MsoNormal">As one of the installers of this digi I'm still blown away by how well a humble FM828A mobile rig with no external filters handled the intense RF environment of the CBD, being a stone's throw from GPT and Centerpoint - the two largest comms sites bristling with pagers.<u></u><u></u></p>
</div><div><p class="MsoNormal">The original installation was an FM92, however the high noise floor rendered the digi useless, it couldn't hear anything beyond about 5km from the site - swapped with the 828 and never looked back.<u></u><u></u></p>
</div><div><p class="MsoNormal"><u></u> <u></u></p></div><div><p class="MsoNormal">It will be sad to see this digi close, but, life goes on :-).<u></u><u></u></p></div><div><p class="MsoNormal"><u></u> <u></u></p></div><div>
<p class="MsoNormal">Cheers, <u></u><u></u></p></div><div><p class="MsoNormal">Geoff VK2XJG / VK8GG<u></u><u></u></p></div><div><p class="MsoNormal" style="margin-bottom:12.0pt"><u></u> <u></u></p><div><p class="MsoNormal">
On Tue, Mar 5, 2013 at 1:29 PM, Peter VERNON <<a href="mailto:peter.vernon@jbo.com.au" target="_blank">peter.vernon@jbo.com.au</a>> wrote:<u></u><u></u></p><div><div><p class="MsoNormal">Guys……<u></u><u></u></p><p class="MsoNormal">
<u></u><u></u></p><p class="MsoNormal">After more than 10 years the Sydney CBD WIDE VK2US-1 will be shutting down in the next few days. We’ve lost the site.<u></u><u></u></p><p class="MsoNormal"> <u></u><u></u></p><p class="MsoNormal">
Sorry for the short notice but that’s how it is.<u></u><u></u></p><p class="MsoNormal"> <u></u><u></u></p><p class="MsoNormal">Regards & 73’s<u></u><u></u></p><table border="0" cellspacing="0" cellpadding="0" style="border-collapse:collapse">
<tbody><tr><td width="372" colspan="2" style="width:223.2pt;padding:0cm .5pt 0cm .5pt"><p class="MsoNormal" style="text-autospace:none"><b>Peter J VERNON | VK2US</b><u></u><u></u></p></td><td width="41" style="width:24.3pt;padding:0cm 0cm 0cm 0cm">
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<p class="MsoNormal" style="text-autospace:none"><b>T</b> <a href="tel:61%202%209007%200977" target="_blank">61 2 9007 0977</a> | <b>F</b> <a href="tel:61%202%209007%200978" target="_blank">61 2 9007 0978</a> | <b>M</b> <a href="tel:61%204%201115%208231" target="_blank">61 4 1115 8231</a> <u></u><u></u></p>
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<b>E</b> <a href="mailto:VK2US@jbo.com.au" target="_blank">VK2US@jbo.com.au</a> | <b>W </b><a href="http://www.vk2us.id.au/" target="_blank">www.vk2us.id.au</a><u></u><u></u></p></td></tr><tr><td width="12" style="width:7.2pt;padding:0cm 0cm 0cm 0cm">
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<u></u><u></u></p></td></tr></tbody></table><p class="MsoNormal"> <u></u><u></u></p><p class="MsoNormal"> <u></u><u></u></p></div></div><p class="MsoNormal" style="margin-bottom:12.0pt"><br>_______________________________________________<br>
OZAPRS mailing list<br><a href="mailto:OZAPRS@aprs.net.au" target="_blank">OZAPRS@aprs.net.au</a><br><a href="http://lists.aprs.net.au/mailman/listinfo/ozaprs" target="_blank">http://lists.aprs.net.au/mailman/listinfo/ozaprs</a><u></u><u></u></p>
</div><p class="MsoNormal"><u></u> <u></u></p></div><p class="MsoNormal" style="margin-bottom:12.0pt"><u></u> <u></u></p><pre>_______________________________________________<u></u><u></u></pre><pre>OZAPRS mailing list<u></u><u></u></pre>
<pre><a href="mailto:OZAPRS@aprs.net.au" target="_blank">OZAPRS@aprs.net.au</a><u></u><u></u></pre><pre><a href="http://lists.aprs.net.au/mailman/listinfo/ozaprs" target="_blank">http://lists.aprs.net.au/mailman/listinfo/ozaprs</a><u></u><u></u></pre>
</blockquote><p class="MsoNormal"><u></u> <u></u></p></div></div></div><p class="MsoNormal" style="margin-bottom:12.0pt"><br>_______________________________________________<br>OZAPRS mailing list<br><a href="mailto:OZAPRS@aprs.net.au" target="_blank">OZAPRS@aprs.net.au</a><br>
<a href="http://lists.aprs.net.au/mailman/listinfo/ozaprs" target="_blank">http://lists.aprs.net.au/mailman/listinfo/ozaprs</a><u></u><u></u></p></div><p class="MsoNormal"><u></u> <u></u></p></div></div></div></div></div>
<br>_______________________________________________<br>
OZAPRS mailing list<br>
<a href="mailto:OZAPRS@aprs.net.au">OZAPRS@aprs.net.au</a><br>
<a href="http://lists.aprs.net.au/mailman/listinfo/ozaprs" target="_blank">http://lists.aprs.net.au/mailman/listinfo/ozaprs</a><br>
<br></blockquote></div><br><br clear="all"><div><br></div>-- <br>Kind Regards, <br><br>Steven <br><br>--------------------------------------------------<br>Steven Booker<br>0434 191 274<br>Registered Psychologist
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