Generations
| IBM Model | 726 | 727 | 728 | 729 | 7330 |
|---|---|---|---|---|---|
| Density (chars/in) | 100 | 200 | 248 | 200, 556, 800 | 200, 556 |
| Tape speed (in/s) | 75 | 75 | 75 | 75 (112.5) |
36 |
| Transfer rate (chars/s) | 7,500 | 15,000 | 18,750 | 15,000 41,700 60,000 (22,500 62,500 90,000) |
7,200 20,016 |
| end of record gap | 1 Inch 100 chars 16.67 words |
0.75 Inches 150 chars 25 words |
0.75 Inches 186 chars 31 words |
0.75 Inches 150, 417, 600 chars 25, 69.5, 100 words |
0.75 Inches 150, 417 chars |
| Rewind speed (in/s, avg.) | 75, read backwards | 500 | 500 | ||
| Start time (msec) | 10 | 5 | 5 | ||
| Stop time (msec) | 10 | 5 | 5 | ||
| Max. length of reel (ft) | 1,400 | 2,400 | 2,400 | 2,400 | 2,400 |
| Base Composition | cellulose acetate | PET film or cellulose acetate |
PET film or cellulose acetate |
PET film | PET film |
Read more about this topic: IBM 7 Track
Famous quotes containing the word generations:
“Books have their destinies like men. And their fates, as made by generations of readers, are very different from the destinies foreseen for them by their authors. Gulliver’s Travels, with a minimum of expurgation, has become a children’s book; a new illustrated edition is produced every Christmas. That’s what comes of saying profound things about humanity in terms of a fairy story.”
—Aldous Huxley (1894–1963)
“... several generations of slum environment will produce a slum heredity ...”
—Albion Fellows Bacon (1865–1933)
“France, indeed! whose Catholic millions still worship Mary Queen of Heaven; and for ten generations refused cap and knee to many angel Maries, rightful Queens of France.”
—Herman Melville (1819–1891)