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

[Robert Middelmann]

Lachlan
I just built myself a hb9cv beam cut for  402mhz There is a calculator to
work out the dimensions at https://www.changpuak.ch/electronics/HB9CV.php

Rob VK5TRM

On Wed, Apr 10, 2019, 17:00 Liam Gunning via Vk5-wx-sonde <
vk5-wx-sonde at vk5fo.com> wrote:

> Any recommendations for antennas?
>
> I’ve already got a number of different options for receivers. But no DF
> antenna.
>
> Regards,
>
> Liam VK5LJG
>
> -------------------------------------
> Liam Gunning
> liam.gunning at icloud.com
>
> Sent from iPhone
>
> On 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 touch
>
> Thankyou!
>
>
> On Wed, 10 Apr 2019 4:39 pm Robert Middelmann via Vk5-wx-sonde <
> vk5-wx-sonde at vk5fo.com wrote:
>
>> Lachlan
>> 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
>>
>> Rob VK5TRM
>>
>> On 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 sondes
>>> https://www.jaycar.com.au/wireless-modules-receiver-433mhz/p/ZW3102
>>>
>>> As 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!
>>>
>>> Regards
>>> Lachlan
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