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A plastic 45 rpm adapter that inserts into the large spindle hole of a 45 rpm record. A 45 rpm adapter (also known as a 45 rpm record insert, 45 rpm spindle adapter, spider, or 7-inch adapter in reference the usual size of a 45 rpm record) is a small plastic or metal insert that goes in the middle of a 45-rpm record so it can be played on the standard size spindle of a turntable.
In the early 1920s, the Edison Records "Diamond Disc" label–here featuring the popular duo of Billy Jones and Ernest Hare–were intended for playback at 80 rpm. The earliest record players were purely mechanical devices with no amplification. The sonic energy was simply the amount of drag that the needle could place on the spinning disk.
Highway Hi-Fi was a system of proprietary players and seven-inch phonograph records with standard LP center holes designed for use in automobiles. Designed and developed by Peter Goldmark, [1] who also developed the LP microgroove, the discs utilized 135 grams of vinyl each, enough to press a standard 10-inch LP (12-inch LPs of the period commonly used 160 grams of vinyl each and 45s used ...
Crosley had produced different products for the war effort, including the 'Pup' 4x4 prototype, a tiny air-portable 4WD. [32] [45] In 1950, to broaden its line-up into the commercial and agricultural market, the Farm-O-Road was introduced – an ATV sized utility vehicle that looked like a small Jeep. It was a combination of a light tractor, a ...
Powel Crosley Jr. (September 18, 1886 – March 28, 1961) was an American inventor, industrialist, and entrepreneur.He was also a pioneer in radio broadcasting, and owner of the Cincinnati Reds major league baseball team.
Peter Pan Records is an American record label specializing in children's music. The label was introduced to the public in March 1948. [ 1 ] The label was owned by the Synthetic Plastics Company of Newark, New Jersey until the 1970s.
[12] [13] RCA later marketed a special turntable for 45 RPM records, the model 9JY. [14] In 1939, RCA introduced two radio-television floor consoles (TRK-9, TRK-12) which used the same internal connection concept but the audio output of the television chassis was connected to the radio/amplifier chassis via a male to male cable. [15]
A CED has a spiral groove on both sides. The groove is 657 nm wide and has a length of up to 19 km (12 mi). The discs rotate at a constant angular speed during playback (450 rpm for NTSC, 375 rpm for PAL) and each rotation contains eight interlaced fields, or four full frames of video. These appear as spokes on the disc surface, with the gap ...
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