Tutorials, technical & design
Back to basics with flashing LEDs
Why bother messing around with radio-electronics?
Understanding radio circuits through block diagrams
Further information on circuits is contained in the following:
Items were chosen for likely usefulness and a satisfaction rating of 4/5 or better.
Anatomy of a homebrew 40m superhet receiver
Testing opposite sideband rejection of SSB receivers with an Android mobile phone
Slope detecting 2 metre FM signals on an AM car radio
A QRP CW transmitter RF power amplifier chain
Anatomy of a 30 watt 7 MHz CW regenerative transceiver (and a DX demonstration)
Anatomy of a homebrew 40m superhet CW transceiver
Homebrew QRP 7 MHz SSB transceiver: circuit anatomy
5. The vagarities of DC to daylight
The best way to connect a trimmer capacitor in an RF circuit
Testing materials for RF properties with a simple receiver
Two tricks with tuned circuits
How to tame parasitic oscillations in variable crystal oscillators
Inside a mains power supply and how it could be built better
Modifying QRP circuits to operate on another band
Debugging an LM386 audio amplifier circuit
6. Further information
More projects and descriptions of them appear at Amateur radio projects.
All material on this site