In the summer 1983 issue of SPRAT, the journal of the G-QRP Club, there appeared a design for an elegantly simple QRP transceiver called the Foxx. Designed by George Burt GM3OXX, the Foxx used just five transistors and employed the PA transistor as the detector for the receiver.
The FOXX-3 by Derek Alexander G4GVM was published in the spring 1999 issue of SPRAT. While based on the original FOXX, it had a few refinements to make operation easier:
- Automatic transmit/receive change over (semi-break-in)
- Built-in harmonic filter.