ESP32 Drives Tiny FM Radio
Even as music streaming services and podcast apps dominate most of our listening time, it’s still a great idea to keep a radio on hand, if for nothing else than …read more Continue reading ESP32 Drives Tiny FM Radio
Tag Archives: Radio
Portrait of a Long Wave Station in its Twilight Years
There’s a quirk of broadcasting in Europe left over from the earliest days of the medium, which our American readers may not have encountered. As well as the familiar AM …read more Continue reading Portrait of a Long Wave Station in its Twilight Years
It’s Numbers All The Way Down With This Tape Measure Number Station Antenna
For all their talk of cooperation and shared interests, the nations of the world put an awful lot of effort into spying on each other. All this espionage is an …read more Continue reading It’s Numbers All The Way Down With This Tape Measure Number Station Antenna
USB-C Power For Ham Radio
Even though manufacturers of handheld ham radios have been busy adding all sorts of bells and whistles into their portable offerings, for some reason, many of them lack a modern …read more Continue reading USB-C Power For Ham Radio
All-Mechanical Coil Winder is a Scrap-Bin Delight
If there’s something more tedious than winding coils, we’re not sure what it is — possibly rolling and wrapping coins; that’s really a bother. But luckily, just like there are …read more Continue reading All-Mechanical Coil Winder is a Scrap-Bin Delight
Remotely Stopping Polish Trains
Turns out that it’s easy to broadcast radio commands that force Polish trains to stop:
…the saboteurs appear to have sent simple so-called “radio-stop” commands via radio frequency to the trains they targeted. Because the trains use a radio system that lacks encryption or authentication for those commands, Olejnik says, anyone with as little as $30 of off-the-shelf radio equipment can broadcast the command to a Polish train—sending a series of three acoustic tones at a 150.100 megahertz frequency—and trigger their emergency stop function…
Neutron images reveal zinc as culprit in Arecibo radio telescope collapse
Almost three years after the event, neutron scans by the Oak Ridge National Laboratory have uncovered the cause of the platform collapse that resulted in the destruction of the 1,000-ft (300-m) Arecibo Observatory radio telescope.Continue ReadingCatego… Continue reading Neutron images reveal zinc as culprit in Arecibo radio telescope collapse
Off-Grid Radio Also Repairable Off-Grid
Low-power radios, often referred to in the amateur radio community as QRP radios, have experienced a resurgence in popularity lately. Blame it on certain parts of the hobby become more …read more Continue reading Off-Grid Radio Also Repairable Off-Grid
While Earth days get longer, NASA finds Mars days are getting shorter
One day on Mars is about 37 minutes longer than an Earth day – but it seems both planets are working to fix the gap. Data from NASA’s InSight lander have revealed Martian days are getting ever so slightly shorter, and scientists aren’t sure why.Continu… Continue reading While Earth days get longer, NASA finds Mars days are getting shorter
Break Free from Proprietary Digital Radio
Digital modes are all the rage these days in amateur radio — hams are using protocols like WSPR to check propagation patterns, FT8 to get quick contacts on many bands …read more Continue reading Break Free from Proprietary Digital Radio