Great news: our next run of WSPR-zero low-pass filter hats just arrived from the manufacturer. They look clean, test out great, and are ready to get on the air.
Highlights at a glance
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✅ Fully assembled boards in hand
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🧰 Meets Raspberry Pi HAT spec (mounting holes align, EEPROM footprint, mechanical keep-outs respected)
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🔧 Raspberry Pi Zero form factor with a perforated, snap-off vestigial section for full-size Pi compatibility
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💸 Cost: The cost came out to about $7.30 per board (assembled + shipping) — pretty amazing
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🌐 Beta testers shipped: New Zealand, France, The Netherlands, England, Canada, and several US states
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⚠️ Tariffs: Not sure what imapct tariffs will have in the future…
Form factor & fit
These boards fully comply with the mechanical requirements to be considered an official Raspberry Pi “HAT.”
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The mounting holes line up perfectly.
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The board includes a breakaway extension: keep it attached for a full-size Pi, or snap it off for a perfect-fit Raspberry Pi Zero footprint.
[UPDATE] Beta shipments
We’ve shipped boards to New Zealand, France, The Netherlands, England, Canada, and across many U.S. states. Huge thanks to everyone helping us validate operation across bands, environments, and antennas, but mostly the code base and our attempt to make things super easy.
Join the community
Got questions, ideas, or want to share your reception maps?
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Discord: Message me for an invitation or search for “WSPR-zero” when you’re logged in to Discord.
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If you recieved a board, share some photos with on Discord!
Happy whispering! 📡
