Build a K9AY Receive Antenna
- This article is how a K9AY switch-able receive antenna was built by Darren Hatcher, G0WCW. It also goes a step further telling you really how to do it, rather than suggesting what to do.
A PIC16F84 based CW Decoder
- CW decoder project that automatically adapts itself to the CW rate and may be employed for learning purpose substituting the traditional tone generator and offering the capability of displaying the keyed code.
The Pixie and Micro-80
- QRP HF Transceivers, Tiny, direct conversion CW transceivers using just a handful of readily available parts.
A CW QRP Transceiver for 20 m band
- The little QRP presented in this article may be built in a gradual manner, it is divided
in two main modules (plus VFO), you may also complete only a single part (RX or TX module).