| Can a simple medium-wave radio receive shortwave broadcasts? In 2005, Burkhard Kainka answered that question with a creative two-transistor...
| Can a simple medium-wave radio receive shortwave broadcasts? In 2005, Burkhard Kainka answered that question with a creative two-transistor...
| A coil-free dual-conversion superhet SDR built from two NE612 mixers and a few passives. The first mixer down-converts to a 455 kHz IF for s...
| A full-featured variable frequency oscillator using only an ESP32 and a Si5351 clock generator linked by four I2C wires, no LCD, no rotary e...
| Build your own compact FM stereo test transmitter that generates ultra-low distortion audio and precise VHF signals using only simple CMOS l...
| Shannon’s sampling theorem states that a signal of frequency f can be fully captured by sampling at 2f. Modern PC sound cards support rates...
| Vintage Radio Equipment presents professional receivers and transmitters from 1940 to 1970 with stunning images and outstanding explanations...
| Tracking the growing number of small satellites is a major challenge — but TinyGS offers a low-cost, open-source solution. This global netwo...
| Discover a clever 1970s AM radio design that tunes MW and LW without a single coil. This vintage synchrodyne receiver uses a synchronized os...
| Raspberry Pi has unveiled the RMC20452T, its debut radio module designed to provide easy-to-integrate Wi-Fi and Bluetooth connectivity for O...
| GPS is widely used worldwide in everyday life. Lesser-known GNSS RTK systems offer sub-centimeter accuracy using carrier phase data — and th...