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. |
From inside the book
Results 1-3 of 17
Page 240
... turns in the winding had been reduced from 1800 to 800 , and the front gap increased from 0.001 inch to 0.003 inch . The inductance of the 800- turn winding with 0.003 - inch gaps was found to be 21 mH , giving a much lower time ...
... turns in the winding had been reduced from 1800 to 800 , and the front gap increased from 0.001 inch to 0.003 inch . The inductance of the 800- turn winding with 0.003 - inch gaps was found to be 21 mH , giving a much lower time ...
Page 290
... turns of copper for the coil , more insulation , and finally the other magnetic pole layer . Many thin - film head elements are deposited simultaneously on a single ceramic substrate wafer about as thick as the length of the slider ...
... turns of copper for the coil , more insulation , and finally the other magnetic pole layer . Many thin - film head elements are deposited simultaneously on a single ceramic substrate wafer about as thick as the length of the slider ...
Page 295
... turns , and disk linear velocity ( rpm and disk diameter ) . The tactic of increasing signal strength by increasing the number of turns ( from 8 turns in 1979 to 37 turns in 1991 ) as track widths were reduced and track density ...
... turns , and disk linear velocity ( rpm and disk diameter ) . The tactic of increasing signal strength by increasing the number of turns ( from 8 turns in 1979 to 37 turns in 1991 ) as track widths were reduced and track density ...
Contents
AUDIO RECORDING | 6 |
The Telegraphone | 15 |
Steel Tape and Wire Recorders | 30 |
Copyright | |
25 other sections not shown
Other editions - View all
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