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How does a crystal radio work?

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Maverickmax

Maverickmax

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Hi

Can someone please tell me how crystal radio work?

Is it AC or DC voltage coming out of it?

MM
 

Re: crystal radio - HELP

Maverickmax said:
Hi

Can someone please tell me how crystal radio work?

Is it AC or DC voltage coming out of it?

MM
Click to expand...

visit the link **broken link removed**

stefano
 

crystal radio - HELP

The crystal radio receiver (also known as a crystal set) is a passive radio receiver consisting of a variable LC tuned circuit, a diode detector, and audio transducer. This is the original, and simplest type of radio receiver in existence. Such apparatus was in very wide use during the early history of radio and is still in limited use today.

Crystal sets with long wire antennas are still of interest to a small group of enthusiasts and a number of web sites are devoted to their construction. Regular contests are held pitting the performance of various designs against each other. Reportedly, modern solid state diodes, ultra-thin litz wire inductors, and low loss capacitors yield performance far in excess of the original receivers.
 

Re: crystal radio - HELP

The output is DC plus the AC modulating signal. In superheterodyne receivers diode detectors are commonly used. The DC component is used for the AGC and the AC is sent to the audio amplifier.
 

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