PhaseLoom v1.0 (Hand fixed, assembled)

Bring the magic of Software Defined Radio to your retro-inspired projects with the PhaseLoom SDR Shield – a quadrature sampling detector SDR frontend designed to work with the 6502-based 65uino (and any microcontroller with I²C support).

This assembled board gives you a head start on experimenting with SDR, IQ sampling, and radio-frequency design — all without the hassle of soldering fine-pitch components.

?? Note: Pin headers are not mounted or included, giving you flexibility to choose the orientation and connector style that fits your project. Also, this is not a standalone project, you need an Uno-style microcontroller like the 6502-based 65uino (software available) or write your own software.

Features

• Quadrature Sampling Detector Frontend
  Tayloe-style commutating mixer with improved noise immunity and differential signal handling.

• SI5351 Clock Generator
  3-channel programmable oscillator with 90° phase offset capability. Controlled via I²C.

• HF Coverage
  Works from audio frequencies up to ~150 MHz (depending on filtering). Great for experimenting with ham bands, shortwave listening, and SDR fundamentals.

• 65uino Compatible
  Designed as an Arduino-style shield for the 6502-based 65uino, but also works with Arduino, ESP32, STM32, and other I²C-capable hosts.

• Open Hardware
  Schematics, firmware, and support resources are freely available — build on it, hack it, or extend it.

What’s Included

• 1 × PhaseLoom SDR Shield (fully assembled SMT parts)

• Gold-plated copper RF traces and SMA connectors

• Preloaded SI5351 ready to be configured via I²C

What’s NOT Included

• Pin headers (mount your own straight, angled, or stacking headers as needed)

• Antenna, bandpass filters, or ADC — you’ll want these for real-world reception

• 65uino or other host board

Perfect For

• Retro computing fans who want to push the 6502 into modern RF territory

• Amateur radio experimenters looking for a compact SDR frontend

• Electronics hobbyists who want a ready-made platform for exploring IQ sampling, aliasing, and GNURadio

Notes

• This is a prototype development board — performance may vary, and experimentation is encouraged!

• All boards sold have been hand-corrected for early-phase pinout errors.

• Open-source hardware files and firmware are on GitHub.

  Source code, software and instructions are on Github: https://github.com/AndersBNielsen/PhaseLoom

? The PhaseLoom makes it possible to hear the airwaves with 1970s silicon at the core. Grab yours today and start exploring the spectrum!