[Vk5-wx-sonde] Cheapo df rig for sondes

[ivan]

I use a home brew HB9CV design with a lot of success. Google HB9CV calculator  Cheers IvanSent from my Samsung Galaxy smartphone.
-------- Original message --------From: Liam Gunning via Vk5-wx-sonde <vk5-wx-sonde at vk5fo.com> Date: 10/4/19  16:59  (GMT+09:30) To: vk5-wx-sonde at vk5fo.com Cc: Liam Gunning <liam.gunning at icloud.com> Subject: Re: [Vk5-wx-sonde] Cheapo df rig for sondes Any recommendations for antennas?I’ve already got a number of different options for receivers. But no DF antenna. Regards,Liam VK5LJG -------------------------------------Liam Gunningliam.gunning at icloud.comSent from iPhoneOn 10 Apr 2019, at 16:42, Lachlan Stewart via Vk5-wx-sonde <vk5-wx-sonde at vk5fo.com> wrote:Nice idea Rob!I might even try that with my spare sdr.I didn't know about sdr touchThankyou!On Wed, 10 Apr 2019 4:39 pm Robert Middelmann via Vk5-wx-sonde <vk5-wx-sonde at vk5fo.com wrote:LachlanMy 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 closeRob VK5TRMOn Wed, Apr 10, 2019, 16:27 Lachlan Stewart via Vk5-wx-sonde <vk5-wx-sonde at vk5fo.com> wrote:Hi all,It seems that a few people maybe after cheap rigs for df'ing sondes. I thought I'd let you know what I use!This 433mhz jaycar receiver is broadband enough to pick up sondeshttps://www.jaycar.com.au/wireless-modules-receiver-433mhz/p/ZW3102As far as putting a circuit together, see step 11 here;https://www.instructables.com/id/433-MHz-UHF-lost-model-radio-beacon/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!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!RegardsLachlan 
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