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 following is excerpted from Chapter 8 from “RF Circuit Design, 2e” by Christopher Bowick. The fundamental operation of an RF front end is fairly straightforward: it detects and processes radio ...

IIIF provides researchers rich metadata and media viewing options for comparison of works across cultural heritage collections. Visit the IIIF page to learn more. This is the main section of Edwin ...

If you purchase an independently reviewed product or service through a link on our website, SPY.com may receive an affiliate commission. Whether you realize it or not, you’re surrounded by an ...

In the design of radio receivers for the measurement of certain types of amplitude-modulated transmission, a useful increase in the output signal/noise ratio can be achieved by restricting the ...

THE principles upon which radio receivers of various types are designed at the present time have been developed by various technical workers, who have in many cases specialized on particular ...

Setting the receiver mode to “AUTO” allows the receiver to choose which detector to use depending on signal conditions. I used the Kenwood model KDC-V7022 for the tests, but there are several models ...

Noise in radio receivers is of great interest to anyone involved in wireless product design. Commonly used figures-of-merit include noise figure (NF), sensitivity ...

In the Astrocosmic Center of the Physical Institute named after Lebedev RAS (ACC FIAN) for the first time in Russia has created a cryogenic receiver capable of detecting radio signals at frequencies ...

IIIF provides researchers rich metadata and media viewing options for comparison of works across cultural heritage collections. Visit the IIIF page to learn more. Marked on rear instruction sheet: ...