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Optonica amplifier (SM-3636) and tuner (ST-3636) from 1978. The Optonica brand was created and first launched by Sharp of Japan in 1975 to compete in the high-end audio market along with established brands such as Sansui Electric, Sony, Panasonic, Sanyo, Yamaha, Nakamichi, Onkyo, Fisher Electronics, Technics (brand), Pioneer Corporation, Kenwood Corporation, JVC, Harman Kardon and Marantz.
7.2 Linear tracking. ... and since the 1940s a record player, ... the sound waves into a wax record with a sharp recording stylus. ...
An advertisement for Edison New Standard Phonograph, 1898 An advertisement for the Columbia Grafonola. This is a list of phonograph manufacturers.The phonograph, in its later forms also called a gramophone, record player or turntable, is a device introduced in 1877 for the mechanical recording and reproduction of sound.
A CD player has three major mechanical components: a drive motor, a lens system or pickup head, and a tracking mechanism. The drive motor (also called spindle) spins the disc to a scanning velocity of 1.2–1.4 m/s ( constant linear velocity ) – equivalent to approximately 500 RPM at the inside of the disc, and approximately 200 RPM at the ...
The World Record Controller was an attachment for ordinary record players that slowed the turntable down when playing the outside of the record and allowed it to gradually speed up as the needle was carried inward by the groove. Of course, only special World records could be used. The World system was a commercial failure.
It features a linear tracking tonearm with an optical sensor that allows for the kind of track-skipping more typical of CD players. The sensor also detects the size of the record sitting on the platter (7-inch, 10-inch, or 12-inch), which allows the needle to drop precisely on the first track. [1]
Most Portable Player: Jenson CD-660 Digital Bluetooth Boombox Best Budget Boombox: Insignia Multi-Function Bluetooth Stereo Boombox (NS-BBBT20) Best Retro Boombox: Riptunes Portable CD Player
William K. Heine presented a paper "A Laser Scanning Phonograph Record Player" to the 57th Audio Engineering Society (AES) convention in May 1977. [1] The paper details a method developed by Heine that employs a single 2.2 mW helium–neon laser for both tracking a record groove and reproducing the stereo audio of a phonograph in real time.
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