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:
“Parenthood has really changed for me. It’s much more than taking care of my son; more than saying yes and no. Now I have to figure out what I think and what I know so that I can answer his questions and explain things to him.”
—Anonymous Parent. As quoted in Between Generations by Ellen Galinsky, ch. 4 (1981)
“If the accumulated wealth of the past generations is thus tainted,—no matter how much of it is offered to us,—we must begin to consider if it were not the nobler part to renounce it, and to put ourselves in primary relations with the soil and nature, and abstaining from whatever is dishonest and unclean, to take each of us bravely his part, with his own hands, in the manual labor of the world.”
—Ralph Waldo Emerson (1803–1882)
“The generations of men run on in the tide of time,
But leave their destined lineaments permanent for ever & ever.”
—William Blake (1757–1827)