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</o:shapelayout></xml><![endif]--></head><body lang=EN-AU link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Springs made for mobile antenna use usually* have a braid internally making electrical connection end-to-end so the electrical length does not change as the spring flexes. however Capacitance changes as the whip (whatever the make) moves in relation to the vehicle so tuning will inevitably vary in motion.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoListParagraph><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>*The braid can be seen inside either through the threaded hole or by bending to open up the spring coil but if not, or you are concerned about it, simply add one externally – form it into a spiral around 180 degrees to allow flexion.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'> 73,<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Bob VK6KW <o:p></o:p></span></p><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"'> OZAPRS [mailto:ozaprs-bounces@aprs.net.au] <b>On Behalf Of </b>Matthew Cook<br><b>Sent:</b> Saturday, December 09, 2017 8:45 PM<br><b>To:</b> Australian APRS Users<br><b>Subject:</b> Re: [OZAPRS] Need a hand - mobile antenna<o:p></o:p></span></p><p class=MsoNormal><o:p> </o:p></p><div><p class=MsoNormal>The base should have a wire that electrically shorts the spring, otherwise bad things happen to your tuning point as the antenna moves.<o:p></o:p></p><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>73<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>Matthew<o:p></o:p></p></div><div><p class=MsoNormal>VK5ZM<o:p></o:p></p></div></div><div><p class=MsoNormal><o:p> </o:p></p><div><p class=MsoNormal>On 9 December 2017 at 15:03, <<a href="mailto:vk4tec@tech-software.net" target="_blank">vk4tec@tech-software.net</a>> wrote:<o:p></o:p></p><div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'>Does a spring base affect the length ?</span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'> </span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'>Andrew</span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'> </span><o:p></o:p></p><div><div style='border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><b><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif"'>From:</span></b><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif"'> OZAPRS [mailto:<a href="mailto:ozaprs-bounces@aprs.net.au" target="_blank">ozaprs-bounces@aprs.net.au</a>] <b>On Behalf Of </b>Bob VK6KW<br><b>Sent:</b> Saturday, 9 December 2017 1:37 PM<br><b>To:</b> 'Australian APRS Users' <<a href="mailto:ozaprs@aprs.net.au" target="_blank">ozaprs@aprs.net.au</a>><br><b>Subject:</b> Re: [OZAPRS] Need a hand - mobile antenna</span><o:p></o:p></p></div></div><div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Hi Folks,</span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>One day I’ll actually get to ‘play radios’ again and be able to join you on air; but in the meantime have to console myself with reading the mail and storing up the good ideas; however in earlier times as Net control for the 14.116 Traveller’s Net, and even travelling o’seas (VK7 & ZL) I found the centre loaded Hustler system to work well on my 80 Series (bull bar) and borrowed/hire cars (tow bar). Simple, convenient, effective – and no I don’t own any shares.</span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Main components are HD spring loaded base, a common folding articulated ‘mast’ section (1/4 wave on 6m) onto which fits coil loaded ‘resonator’ for whichever band – available for 80m – 10m including WARC.</span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>My subjective observations were that it out performed the Codan 9350+ 1.8m SS whip on any given band. </span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'> </span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>I presume they are still available – have not had to look as I have several sets including the suitcase-ready one. Just don’t try taking it onto a cruise liner or they will lock it in the hold!!! Rotten spoil sports!</span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>73,</span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Bob VK6KW</span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'> </span><o:p></o:p></p><div><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><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"'> OZAPRS [<a href="mailto:ozaprs-bounces@aprs.net.au" target="_blank">mailto:ozaprs-bounces@aprs.net.au</a>] <b>On Behalf Of </b>vk2tv<br><b>Sent:</b> Saturday, December 09, 2017 5:08 AM<br><b>To:</b> <a href="mailto:ozaprs@aprs.net.au" target="_blank">ozaprs@aprs.net.au</a><br><b>Subject:</b> Re: [OZAPRS] Need a hand</span><o:p></o:p></p></div></div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p><p><span style='font-family:"Arial","sans-serif"'>The more I look at the vehicle, the more I read and the more I hear, the less I want to install something I'll hardly use!</span><o:p></o:p></p><p><span style='font-family:"Arial","sans-serif"'>I did consider a nudge bar but not at $800.</span><o:p></o:p></p><p><span style='font-family:"Arial","sans-serif"'>I'll build up a tilt-over mast for at home and populate it before I spend too much time on the X-Trail.</span><o:p></o:p></p><p><span style='font-family:"Arial","sans-serif"'>Ray vk2tv</span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>On 08/12/17 20:40, Liz wrote:<o:p></o:p></p></div><blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'><pre>QTR Mon, 4 Dec 2017 09:19:27 +1100 vk2tv QTC<o:p></o:p></pre><pre> <o:p></o:p></pre><blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'><pre>I've just looked at my X-Trail and I think I've lost any enthusiasm I <o:p></o:p></pre><pre>had for installing radios, hi. I think the engine block was poured in<o:p></o:p></pre><pre>situ!<o:p></o:p></pre><pre> <o:p></o:p></pre><pre>The main frame of the vehicle - subframe, floor pan, roof, firewall<o:p></o:p></pre><pre>and door frames - seems to be a welded mass of metal to which<o:p></o:p></pre><pre>mudguards, bonnet, doors, etc are bolted, so any bolts attaching<o:p></o:p></pre><pre>components to the sub-frame could be a possibility. A "Z" bracket<o:p></o:p></pre><pre>coming out from under the bonnet could possibly utilise one of the<o:p></o:p></pre><pre>mudguard mounting bolts. A magbase on the edge of the bonnet could be<o:p></o:p></pre><pre>earthed via a short lead to a mudguard mount or the bonnet hinge<o:p></o:p></pre><pre>mount. Most bonnets are not purposely earthed so heavy(ish) straps<o:p></o:p></pre><pre>(RG213 braid, e.g.) around the hinges could be beneficial. A couple<o:p></o:p></pre><pre>of possibilities there, but this is just one specific vehicle.<o:p></o:p></pre><pre> <o:p></o:p></pre><pre>My days of crawling over and under vehicles to install radios ended a <o:p></o:p></pre><pre>long time ago; these days I'm the wrong shape for crawling under, and <o:p></o:p></pre><pre>multi-focal spectacles don't work well upside down under a dash.<o:p></o:p></pre><pre> <o:p></o:p></pre><pre>Ray<o:p></o:p></pre><pre> <o:p></o:p></pre><pre>vk2tv<o:p></o:p></pre></blockquote><pre> <o:p></o:p></pre><pre>I've got a 32 series Xtrail.<o:p></o:p></pre><pre>You forgot to mention the 8cm of insulating foam as well....<o:p></o:p></pre><pre>My OM took out the passenger seat and got a base plate fitted to the<o:p></o:p></pre><pre>base of the seat, on which the radios sit, with one head on the dash<o:p></o:p></pre><pre>and the other on a stalk attached to the passenger seat bolt.<o:p></o:p></pre><pre>Antenna for 2m is in the middle of the roof and HF antenna on the<o:p></o:p></pre><pre>bullbar. As indicated previously, motorising the antenna support cost<o:p></o:p></pre><pre>about $45K.<o:p></o:p></pre><pre> <o:p></o:p></pre><pre> <o:p></o:p></pre><pre> <o:p></o:p></pre><pre>-+-+-+-+-+-+-+-+-+-+-+<o:p></o:p></pre><pre>Liz<o:p></o:p></pre><pre>VK2XSE<o:p></o:p></pre><pre>_______________________________________________<o:p></o:p></pre><pre>OZAPRS mailing list<o:p></o:p></pre><pre><a href="mailto:OZAPRS@aprs.net.au" target="_blank">OZAPRS@aprs.net.au</a><o:p></o:p></pre><pre><a href="http://lists.aprs.net.au/mailman/listinfo/ozaprs" target="_blank">http://lists.aprs.net.au/mailman/listinfo/ozaprs</a><o:p></o:p></pre></blockquote><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p></div></div></div></div><p class=MsoNormal style='margin-bottom:12.0pt'><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><o:p></o:p></p></div><p class=MsoNormal><o:p> </o:p></p></div></div></body></html>