or if you’re just a ham radio geek in need of a bizarre challenge, don’t miss Alexanderson Day 2015 tomorrow, Sunday, June 28th The Alexanderson Transmitter design dates back to around 1910 ...

But for a weekend project, [Vinod.S] took the ultrasonic transmitter and receiver from a distance-meter module and used amplitude modulation to send music ultrasonically from his laptop to a ...

And despite the tech seemingly aging out, there are many reasons why people still use ham radios. Some instances include ...