This site is the home of the mcHF QRP transceiver. It is a small, home-brewed amateur radio project. Firmware is released as open-source and most project files are released as well, with the only restriction of not for commercial use (manufacturing and sales of kits or complete product).
Looking at the block diagram (Fig1), it should be clear that the design goal was to make it as cheap as possible – without sacrificing functionality – and include the ability to add new features via simple software update or hardware modifications where possible.
The choice of architecture is a direct conversion receiver and transmitter, with a small micro-controller to provide control and DSP functions. The analog blocks in this implementation were kept to the bare minimum. Shifting, as much as possible, functionality into the digital domain. Some datasheets with a more detailed description of the design concepts of individual blocks are available at the Downloads page.
- Standalone and compact embedded transceiver
- Continues RX coverage 2-30 Mhz
- 5W output power
- CW, SSB, AM and FM – transmit and receive
- 300/500 Hz CW and 1.8/2.3 kHz SSB filters with adjustable passband centering
- 3.6 kHz “wide” filter plus 5, 6, 7.5 or 10 kHz “extra wide” filters for SSB/AM reception
- SSB/AM Transmit Speech processor
- DSP noise reduction
- DSP automatic notch filter
- Spectrum scope
- Waterfall Display
- Highly configurable with a wide variety of menu items
M0NKA mcHF 0.6.3
“Thank you for this wonderful open-source HF radio project; you have no idea how you have changed so many people who want to get into the Ham Radio hobby.”
mcHF is a Project and comes as a DIY Kit for self-assembly
The kit requires some advanced soldering skills and knowledge in electronics as mods might be required. Also, extensive tuning and calibration might be needed, or sometimes debugging of problems. It is not recommended as the first kit or if you expect to be on the air after a few M3 bolts tightening. The basic tools needed for the build are soldering iron with solder 60/40 and liquid flux pen, as well as multi-meter. We also recommend Oscilloscope and LC meter.
If you lack any of these skills, don’t let this stop you! Please visit the Fully-Built section of the Shop Page and see if you can benefit from already assembled and tested -SDR transceivers.
“…thank you for not giving up and carrying on this wonderful project for
lots of others!”