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2. History of radio - Wikipedia

   en.wikipedia.org/wiki/History_of_radio

   The invention of the superheterodyne receiver solved this problem, and the first radios with a heterodyne radio receiver went for sale in 1924. But it was costly, and the technology was shelved while waiting for the technology to mature, and in 1929 the Radiola 66 and Radiola 67 went for sale. [58] [59] [60]

3. Direct-conversion receiver - Wikipedia

   en.wikipedia.org/wiki/Direct-conversion_receiver

   Direct-conversion receiver. A direct-conversion receiver (DCR), also known as homodyne, synchrodyne, or zero-IF receiver, is a radio receiver design that demodulates the incoming radio signal using synchronous detection driven by a local oscillator whose frequency is identical to, or very close to the carrier frequency of the intended signal.

4. Audio equipment - Wikipedia

   en.wikipedia.org/wiki/Audio_equipment

   Audio equipment. An audio amplifier is a common piece of audio equipment. Audio equipment refers to devices that reproduce, record, or process sound. This includes microphones, radio receivers, AV receivers, CD players, tape recorders, amplifiers, mixing consoles, effects units, headphones, and speakers. [1]

5. Radio receiver design - Wikipedia

   en.wikipedia.org/wiki/Radio_receiver_design

   Radio receiver design. Radio receiver design includes the electronic design of different components of a radio receiver which processes the radio frequency signal from an antenna in order to produce usable information such as audio. The complexity of a modern receiver and the possible range of circuitry and methods employed are more generally ...

6. craigslist - Wikipedia

   en.wikipedia.org/wiki/Craigslist

   This is an accepted version of this page This is the latest accepted revision, reviewed on 29 September 2024. Classified advertisements website Craigslist Inc. Logo used since 1995 Screenshot of the main page on January 26, 2008 Type of business Private Type of site Classifieds, forums Available in English, French, German, Dutch, Spanish, Italian, Portuguese Founded 1995 ; 29 years ago (1995 ...

7. AOL

   search.aol.com

   The search engine that helps you find exactly what you're looking for. Find the most relevant information, video, images, and answers from all across the Web.