Only use an original QRP Labs QCX firmware chip Program only the provided .hex file; do not change the Fuse settings, or other memories (e.g. EEPROM). Simon VK3ELH wrote a tutorial on how to use an ...
[Hans Summers] runs a site qrp-labs.com, selling self-assembly kits mostly for radio gear and GPS applications, and had some production problems with his QCX-mini QRP transceiver kit. They were ...