The modern cellular network is a marvel of technological advancement that we often take for granted now. With 5G service...
Makers
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...
All right, confession time. I don’t use my handheld ham radio for much more than eavesdropping on the subway dispatcher when my...
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...
Video may have killed the radio star, but cell phones and smart phones all but killed the pager. They still...
CATS is a new communication and telemetry standard intended to surpass the current Automatic Packet Reporting System (APRS) standard by leveraging...
It might not count as “DC to daylight,” but an electromechanical attenuator that covers up to 70 GHz is pretty...
picked up a shortwave receiver known as the “stressless” receiver kit. We aren’t sure if the stress is from building a...
The range of hardware that comes on some dev boards these days is truly staggering. Those little LoRa boards are...
During the first half of the 20th century radio technology was booming, albeit restricted by the vacuum tube technology of...
The Titanic famously (or infamously) used Morse code to call out in distress at the end of its final voyage....
