Amateur

SDRs are available in a wide range of performance, form factor and cost, so choosing the right SDR for your application can be a challenge. After the technological boom of digital electronics, software defined radios (SDRs) became a popular state-of-the-art technology in radio applications, creating a niche that continues to expand. Within the SDR market, …

Selecting the right software defined radio solution for your application Read More »

Let’s start off with proof. Below is an animation of a measurement of airplanes and meteors I made using a radar system that I built with a few simple easily available pieces of hardware: two $8 RTL software defined radio dongles that I bought on eBay, and two log-periodic antennas. And get this, the radar …

Building Your Own SDR-based Passive Radar On A Shoestring Read More »

The availability of cheap SDR hardware created a thriving ecosystem for SDR software, but much of the hardware driving the revolution was still “cheap.” Over the last few years, we’ve seen quality equipment that replaces TV switches in many settings, and step-down converters designed to allow them to work on amateur radio tapes. But something …

Five-Watt SDR Transceiver For Hams Read More »

The amateur radio repeater was a complex set of equipment that could easily fill a 19 ″ trunk. There will be a receiver and a separate transmitter, usually redesigned by commercial units, a home-made logic unit with a microprocessor to monitor everything, and a huge set of filters to stop the transmitter output from clogging …

An Amateur Radio Repeater Using An RTL-SDR And A Raspberry Pi Read More »

The world of magic had Houdini, who pioneered tricks that are still performed today. And data compression has Jacob Ziv. In 1977, Ziv, working with Abraham Lempel, published the equivalent of Houdini on Magic: a paper in the IEEE Transactions on Information Theory titled “A Universal Algorithm for Sequential Data Compression.” The algorithm described in …

Track the Movement of the Milky Way With This DIY Radio Telescope Read More »