Amateur radio is the only hobby that offers its licensed operators the chance to legally design, build, and operate high power radio transceivers connected to unlimited antenna arrays for the purpose ...

A crystal radio is basically a high Q resonator tied to an antenna and an envelope detector. These days the envelope detector is a point contact diode such as a 1N34 Germanium diode. The resonant ...

The human body is a fascinating, well-oiled machine forged and perfected by hundreds of millions of years of evolution. So, when two MIT researchers were looking for a highly efficient design for a ...

Software Defined Radio (SDR) turns the hardwired, task-specific and very elaborate chip development of the past into a flexible software-based design running on a generic, efficient and mass-produced ...

The process of designing a radio system can be complex and often involves many project tradeoffs. With a little insight, balancing these various characteristics can make the job of designing a radio ...

Many of today’s experienced engineers got their start in electronics through amateur, or “ham,” radio. (Many theories exist over the origin of the term “ham radio,” but there is no consensus.) Over ...