GPS QRM

[Jacek Radzikowski]

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
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-- 
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