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Dave Goncalves edited this page Jul 16, 2026
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A simplified, HF-only software-defined radio (SDR) receiver based on the RX-888 — a proof-of-concept on a larger 6-layer board with improved thermal and RF layout.
- HF-only (no VHF up/down converter)
- 6-layer PCB, 0603 passives, no bottom-side components
- Bypassable RF input filtering
- External reference-clock input with auto-switching
- Attenuated filter-bypass injector port (for timesync)
- SPI boot PROM: USB boot, SPI boot, or SPI boot with USB fallback
| Function | Part |
|---|---|
| ADC | LTC2208 (16-bit) |
| Clock generator | Si5351 |
| USB3 controller | EZ-USB FX3 (CYUSB301x) |
| SPI boot flash | MX25L3233F |
- Reference Documents — device datasheets and RX888 reference material.
The KiCad design lives in the main repository.