GPS QRM

[Martin]

I believe that's Bill Brown's WB8ELK's software
https://gmigliarini.wixsite.com/wb8elksoftware

There are competing designs for WSPR Type 3 messages.  I have been holding
off experimenting with that to see who wins.  The second (Type 3) message
depends on the successful decode of the first message if I understand
correctly.

Martin



On Wed, May 26, 2021 at 8:46 PM Jacek Radzikowski <
jacek.radzikowski at gmail.com> wrote:

> W5KUB did an interesting hack to WSPR to send much more data in the frame.
> In 2 frames they can send 6-character grid square and a bunch of telemetry
> data https://youtu.be/KluPoJsOcm4?t=1903
>
> Jacek
> kw4ep
>
>
> On Wed, May 26, 2021 at 11:37 PM Martin <dcmk1mr2 at gmail.com> wrote:
>
>> I have caught the pico balloon craze and have started building my own
>> trackers.  I'm new to RF PCB making and have made several PCB versions that
>> worked well.  I recently started running into GPS noise problems that seem
>> to emanate from the Si5351A chip used to generate the 20 m, 10 mW WSPR
>> signal.
>>
>> I have tried via stitching on a two layer board with plenty of decoupling
>> caps with no joy.
>>
>> Could anyone help?
>>
>> I do have GPS working good enough to fly.  Here is my best result so far
>> on 2 - $2 party balloons.   WSPR only sends 4 characters of maidenhead grid
>> square to only coarse position reports for now.  We're working on it.
>> [image: image.png]
>>
>>
>> 73 Martin W6MRR
>> _______________________________________________
>> Tacos mailing list
>> Tacos at amrad.org
>> https://lists.amrad.org/mailman/listinfo/tacos
>>
>
>
> --
> Given a choice between two theories, take the one which is funnier
>
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