Magnetic Recording: The First 100 YearsEric D. Daniel, C. Denis Mee, Mark H. Clark Electrical Engineering/History of Technology Magnetic Recording The First 100 Years The first magnetic recording device was demonstrated and patented by the Danish inventor Valdemar Poulsen in 1898. Poulsen made a magnetic recording of his voice on a length of piano wire. Magnetic Recording traces the development of the watershed products and the technical breakthroughs in magnetic recording that took place during the century from Poulsen’s experiment to today’s ubiquitous audio, video, and data recording technologies, including tape recorders, video cassette recorders, and computer hard drives. An international author team brings a unique perspective, drawn from professional experience, to the history of magnetic recording applications. Their key insights shed light on how magnetic recording triumphed over all competing technologies and revolutionized the music, radio, television, and computer industries. They also show how these developments offer opportunities for future applications. Magnetic Recording features 116 illustrations, including 92 photographs of historic magnetic recording machines and their inventors. |
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Page 221
... stored program digital computer in the 1950s changed the basic computer configuration , making it much more flexible and generating an ever increasing demand for memory or storage . Figure 15-1 shows a block diagram of a stored program ...
... stored program digital computer in the 1950s changed the basic computer configuration , making it much more flexible and generating an ever increasing demand for memory or storage . Figure 15-1 shows a block diagram of a stored program ...
Page 246
... stored 4000 16 - decimal - digital words , plus sign ; the other stored 10,000 8 - digit instruc- tions . The drums revolved at 1800 rpm , so that the maximum access time was 37 ms . There were 1600 tracks , with one read / write head ...
... stored 4000 16 - decimal - digital words , plus sign ; the other stored 10,000 8 - digit instruc- tions . The drums revolved at 1800 rpm , so that the maximum access time was 37 ms . There were 1600 tracks , with one read / write head ...
Page 247
... stored 8192 or 16,384 words each consisting of 35 alphanumeric characters , plus sign . The average access time was 50 ms to the first word of a group of words being addressed . The IBM 702 computer drum stored 60,000 al- phanumeric ...
... stored 8192 or 16,384 words each consisting of 35 alphanumeric characters , plus sign . The average access time was 50 ms to the first word of a group of words being addressed . The IBM 702 computer drum stored 60,000 al- phanumeric ...
Contents
AUDIO RECORDING | 6 |
The Telegraphone | 15 |
Steel Tape and Wire Recorders | 30 |
Copyright | |
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Magnetic Recording: The First 100 Years Eric D. Daniel,C. Denis Mee,Mark H. Clark Limited preview - 1998 |
Common terms and phrases
ac bias Ampex analog applications areal density b/in bandwidth BASF bit density broadcast Brush capacity capstan cartridge coating color compact cassette consumer Corporation cost Courtesy data rate data recording data storage developed device diameter digital recording digital video recording disk drive diskette early electronic engineers equipment error Figure film frequency German helical-scan improved inches industry instrumentation recorder Jack Mullin Ludwigshafen machine magnetic disk magnetic drum magnetic recording magnetic tape Magnetophon manufacturers mechanism memory Model modulation operation oxide Panasonic particles patent performance personal computer phonograph playback Poulsen prerecorded production quadruplex radio recording format recording heads recording medium recording system recording technology reel rotating SMPTE Sony sound Soundmirror standard stored studio surface tape drive tape speed Telegraphone telephone television tion track United video cassette recorder video signal video tape recorder wire recorders