Radio Circuits Blog
This site provides schematics of various radio projects that you can experiment yourself.
Friday, 6 February 2026
Building End Fed Half Wave antenna (EFHW) for 40M – 10M
Building End Fed Half Wave antenna (EFHW) for 40M – 10M: The End Fed Half Wave Antenna (EFHW) 40m – 10m antenna is one of the most popular and versatile multi-band antennas for amateur radio. It requires only a single support, is quick to deploy, and offers excellent performance across the 40m, 20m, 15m, and 10m bands. This design is perfect for operations like POTA (Parks on the Air) or SOTA (Summits on the Air), or simply for hams with limited space.
Wednesday, 4 February 2026
Near Vertical Incidence Skywave (NVIS): The Definitive Guide to Reliable Regional HF Radio
Ever wonder why your HF signal skips over the next town but hits the next continent? 🌎
Master NVIS (Near Vertical Incidence Skywave) to close the gap! Perfect for regional nets and emergency comms when the repeaters go down.
Check out the definitive guide here: 👇
#HamRadio #RadioOperator #NVIS #VU3DXR #AmateurRadio
Simple UJT Morse Code Practice Oscillator Circuit
Simple UJT Morse Code Practice Oscillator Circuit: Learn to build a simple UJT Morse code practice oscillator with basic components. Perfect beginner electronics project for ham radio enthusiasts.
Build Your Own Solar Powered Radio
Build Your Own Solar Powered Radio: Solar cells can easily provide enough power to operate a small radio receiver. This Solar Powered Radio project is an ideal set to take away on holiday.
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