When is the speed of light not the speed of light? Of course, that’s a trick question. The speed of...
hackaday
There are many facets to being a radio hobbyist, but if you’ve ever had the urge to dabble in radio...
If you read the December 1970 issue of Mechanix Illustrated, you’d be treated to ’s crystal radio build. He called out...
Most modern ham rigs have a voice activated transmission (VOX) mode, although we don’t know many people who use it...
They say that if you love something, you should set it free. That doesn’t mean that you should spend any...
The world of amateur radio is like many other fields in that there has been a move underway from analogue...
Conceptually, radar is pretty simple: send out a radio wave and time how long it takes to get back via...
When you hear about a switching power supply, you think of a system that uses an inductor and a switch...
The modern cellular network is a marvel of technological advancement that we often take for granted now. With 5G service...
When we think of a spark gap radio transmitter, most of us immediately imagine an early twentieth century ship’s radio...
In the past few years we’ve seen the rise of low-power mesh networking devices for everything from IoT devices, weather...
Amateur radio license exams typically have a question about the bandwidths taken up by various modulation types. The concept behind...
How may radios do you own? Forget the AM/FM, GMRS/FRS radios you listen to or communicate with. We’re talking about...
A staple of the radio amateur’s arsenal of test equipment in previous decades was the dip meter. This was a...
A LoRa project has traditionally required a dedicated radio module, because it’s a commercially licenced protocol. But as the way...
While most of us carry cell phones that have GPS and other location services, they require a significant amount of...
If necessity is the mother of invention, nostalgia must be its stepmother, or its aunt at the very least. The...
Watch out, Baofeng; there’s a new kid on the cheap handy talkie market, and judging by this hardware and firmware upgrade...
built a simple Tayloe mixer and detector on a breadboard. He decided to extend it a bit to be a full-blown...
Every 26 months, Earth and Mars come tantalizingly close by virtue of their relative orbits. The closest they’ve been in...
RNode is an open source, unrestricted digital radio transceiver based on — but not limited to — the Reticulum cryptographic networking stack....
With the recent string of lunar landing attempts, it’s interesting to consider how much things have changed – or stayed...
We are always fascinated when someone can take something and extend it in a clever way without changing the original...
Numbers stations are a weird phenomenon where odd voices read out long strings of numbers or random codewords to the...
The radio frequency world is full of mysteries, some of which seem to take a lifetime to master. And even...
