<html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"></head><body><div>I use a home brew HB9CV design with a lot of success. Google HB9CV calculator Cheers Ivan</div><div><br></div><div><br></div><div><br></div><div id="composer_signature"><div style="font-size:85%;color:#575757" dir="auto">Sent from my Samsung Galaxy smartphone.</div></div><div><br></div><div style="font-size:100%;color:#000000"><!-- originalMessage --><div>-------- Original message --------</div><div>From: Liam Gunning via Vk5-wx-sonde <vk5-wx-sonde@vk5fo.com> </div><div>Date: 10/4/19 16:59 (GMT+09:30) </div><div>To: vk5-wx-sonde@vk5fo.com </div><div>Cc: Liam Gunning <liam.gunning@icloud.com> </div><div>Subject: Re: [Vk5-wx-sonde] Cheapo df rig for sondes </div><div><br></div></div>Any recommendations for antennas?<div><br></div><div>I’ve already got a number of different options for receivers. But no DF antenna. <br><div><br><div dir="ltr"><span style="background-color: rgba(255, 255, 255, 0);">Regards,<br><br>Liam VK5LJG <br><br>-------------------------------------<br>Liam Gunning<br><a href="mailto:liam.gunning@icloud.com">liam.gunning@icloud.com</a></span><div><span style="background-color: rgba(255, 255, 255, 0);"><br>Sent from iPhone</span></div></div><div dir="ltr"><br>On 10 Apr 2019, at 16:42, Lachlan Stewart via Vk5-wx-sonde <<a href="mailto:vk5-wx-sonde@vk5fo.com">vk5-wx-sonde@vk5fo.com</a>> wrote:<br><br></div><blockquote type="cite"><div dir="ltr"><div dir="auto"><div>Nice idea Rob!<div dir="auto"><br></div><div dir="auto">I might even try that with my spare sdr.</div><div dir="auto">I didn't know about sdr touch</div><div dir="auto"><br></div><div dir="auto">Thankyou!</div><br><br><div class="gmail_quote"><div dir="ltr">On Wed, 10 Apr 2019 4:39 pm Robert Middelmann via Vk5-wx-sonde <<a href="mailto:vk5-wx-sonde@vk5fo.com">vk5-wx-sonde@vk5fo.com</a> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="auto">Lachlan<div dir="auto">My DFing setup is just an SDR, portable beam and a tablet computer running SDR touch on Android. Nice thing about the SDR is you can wind the gain down when you get close</div><div dir="auto"><br></div><div dir="auto">Rob VK5TRM</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Wed, Apr 10, 2019, 16:27 Lachlan Stewart via Vk5-wx-sonde <<a href="mailto:vk5-wx-sonde@vk5fo.com" target="_blank" rel="noreferrer">vk5-wx-sonde@vk5fo.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="auto">Hi all,<div dir="auto"><br></div><div dir="auto">It seems that a few people maybe after cheap rigs for df'ing sondes. I thought I'd let you know what I use!</div><div dir="auto"><br></div><div dir="auto">This 433mhz jaycar receiver is broadband enough to pick up sondes</div><div dir="auto"><a href="https://www.jaycar.com.au/wireless-modules-receiver-433mhz/p/ZW3102" rel="noreferrer noreferrer" target="_blank">https://www.jaycar.com.au/wireless-modules-receiver-433mhz/p/ZW3102</a></div><div dir="auto"><br></div><div dir="auto">As far as putting a circuit together, see step 11 here;</div><div dir="auto"><a href="https://www.instructables.com/id/433-MHz-UHF-lost-model-radio-beacon/" rel="noreferrer noreferrer noreferrer" target="_blank">https://www.instructables.com/id/433-MHz-UHF-lost-model-radio-beacon/</a><br></div><div dir="auto"><br></div><div dir="auto">When used with a 5 element yagi it is pretty sensitive to the sondes. When on the ground the range is around 1km, dependent on hills of course!</div><div dir="auto"><br></div><div dir="auto">This receiver only pickups up the carrier. So with a normal radio you'd get silence, this unit gives distinct sounds. This maybe useful for those encrypted units!</div><div dir="auto"><br></div><div dir="auto">Regards</div><div dir="auto">Lachlan </div></div>
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