4501
The Tektronix 4501 is a scan converter, an analog memory device with readout in the form of a composite TV signal. The R4501 is the rack-mount version.
It contains a Tek-produced 5" bistable storage tube. Effective resolution is 125×100.
The 4501 has a differential X/Y and intensity (Z) inputs and can produce either 525-line/60 Hz or 625-line/50 Hz video (monochrome). It can also be interfaced directly to a 4551 Light Pen System to draw on the stored image.
The 4501 was designed in Chuck Gibson's group, which was a small group exploring new products using Tek technologies, principally CRTs. George Edens, Chuck Gibson plus one or two others in the group worked on the design. Dan Denham may have helped, but he was new to the group at the time and did not do any significant engineering design on the 4501.
The goal of the 4501 was to use the Tek bistable storage CRT as a memory device from which an image could be displayed on a much larger CRT display for group viewing. The 4501 was a scan converter using the same CRT as the 601.
Once an image was stored on the CRT phosphors, the electron beam energy was lowered and the screen was scanned at NTSC rates and specs. The signal was obtained from the CRT screen, then sent to a monochrome display.
Any image such as graphs could be stored and displayed. There was no gray scale capability; it was all black and white on a TV type screen. The 4501 could be placed on a desk, or rack mounted.
The CRT (T6011-203, 154-0616-00) was a ceramic envelope, flat-glass faceplate, 6 inch Anderson storage tube manufactured by Tek.
Key Specifications
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Links
Documents Referencing 4501
| Document | Class | Title | Authors | Year | Links |
|---|---|---|---|---|---|
| Tekscope 1969 V1 N3 Jun 1969.pdf | Article | A New Look in Information Display | 1969 | 601 • 602 • 611 • 4501 • T4002 | |
| Tekscope 1970 V2 N5 Oct 1970.pdf | Article | Tektronix Storage Tubes | 1970 | 601 • 611 • T4002 • T4005 • 4201 • 4501 • 4601 • 7514 | |
| History of the Information Display Division - John Lamb, June 1974.pdf | Article | History of the Information Display Division | John Lamb | 1974 | Information Display Division • 601 • 611 • 602 • 4002 • 4501 • 4005 • 4601 • 4901 • 4951 • 4002A • 4551 • 4701 • Tekplot • 4602 • 4010 • 4610 • 4911 • 4912 • 613 • 4903 • 4012 • 4013 • 4014 • 4015 • 4023 • 4503 • 4921 • 4922 • 4953 • 4954 |
Patents that may apply to 4501
| Page | Title | Inventors | Filing date | Grant date | Links |
|---|---|---|---|---|---|
| Patent US 3408530A | Scan conversion storage tube and method of operation | Chuck Gibson | 1964-11-20 | 1968-10-29 | Scan converter • 4501 |
| Patent US 3453403A | Power selection device | Eldon Hoffman | 1966-08-18 | 1969-07-01 | 115 • 140 • 141 • 141A • 144 • 145 • 146 • 147 • 148 • 149 • 149A • 230 • 284 • 286 • 453 • 454 • 491 • 520A • 521A • 522 • 545B • 547 • 556 • 561B • 564B • 568 • 576 • 611 • 647A • 2101 • 2601 • 4501 • 5030 • R5030 • 5031 • R5031 • 7503 • 7504 • 7704 • 7704A • 7904 • R7903 |
Pictures
Components
Some Parts Used in the 4501
| Part | Part Number(s) | Class | Description | Used in |
|---|---|---|---|---|
| 151-0261-00 | 151-0261-00 | Discrete component | dual PNP transistor | AM501 • AM502 • CG5001 • CG551AP • FG501 • FG502 • FG503 • OF150 • OF151 • OF152 • OF235 • OS261 • RM502A • R1140 • R5030 • R5031 • R7912 • 067-0679-00 • 067-0807-00 • 1101 • 1140A • 1141 • 1142 • 1350 • 145 • 1450 • 1480 • 1481 • 1482 • 1485 • 1501 • 1801 • 1900 • 1910 • 1980 • 213 • 26A1 • 26A2 • 2620 • 285 • 3A9 • 3A10 • 3S1 • 3S2 • 3S5 • 3S6 • 432 • 434 • 4501 • 454 • 4601 • 4602 • 4610 • 4612 • 4620 • 4632 • 4634 • 4701 • 475 • 492 • 492A • 492AP • 494 • 494P • 496 • 496P • 5A13N • 5A20N • 5A21N • 5A22N • 5A26 • 5L4N • 502A • 5030 • 5031 • 576 • 690SR • 7A22 • 7A29 • 7B51 • 7B71 • 7J20 • 7L5 • 7S11 • 7S12 • 7912AD |
| 2N3739 | 151-0201-00 | Discrete component | Silicon NPN power transistor | 013-002 • 106 • 4501 • 561B • R561B • 564B • R564B • 568 • 7503 • 7504 |
| CA3046 | 156-0048-00 | Monolithic integrated circuit | transistor array | 4501 • 4551 • 4601 • 7104 • 7403N • 7503 • 7B53A • 7D12 • DM502 • FG504 • S-52 • Telequipment D34 • 7603 • 7613 • 7623 • 7633 • FG507 • Keithley 227 |
| MC891P | 156-0059-00 | Monolithic integrated circuit | Dual MRTL J-K flip-flop | 2901 • 4501 |
| T6011 | 154-0616-00 | CRT | 6" direct-view storage CRT | 4501 |