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 ...

Fairview Microwave Inc. recently released a full line of coaxial-packaged tunnel diode detectors that are are well-suited for proof-of-concept and prototype applications. Such application areas ...

The history of the diode is a fun one as it’s rife with accidental discoveries, sometimes having to wait decades for a use for what was found. Two examples of that are our first two topics: thermionic ...