533
The Tektronix Type 533 is a 15 MHz oscilloscope introduced in 1958 that uses letter-series and 1-series plug-ins.
It is similar to a 535, but without the second, delayed timebase. Instead, it has a range of horizontal magnifiers from ×2 to ×100.
There is also a rack-mount version, the RM33. Later 533A have BNC connectors. The standard CRT for the 533 and 533A is the T5330-2. The difference between the 533 and 533A is only the trigger mode.
Key Specifications
| Bandwidth | DC to 15 MHz (≤ 3 dB) with Type K plug-in |
|---|---|
| Rise time | 0.024 μs |
| Line Voltage | 108/115/122/216/230/244 VAC ±10%, selected via soldering wire on transformer, 50 Hz to 60 Hz |
| Thermal Protection | Automatic resetting thermal cutout, in case internal temperature exceeds safe operating level |
| Power Consumption | 500 W with CA plug-in |
| Cooling | AC Fan |
| Trigger Modes (533) | AC/DC/AC Slow, and HF Sync |
| Trigger Modes (533A) | AC/DC/AC LF Reject, and HF Sync |
| Anode Potential | 10 kV |
| Screen Area | 6 cm × 10 cm |
| Construction | Aluminum alloy chassis. Anodized front panel |
| Weight | 61.5 lbs / 27.8 kg |
Internals
The vertical amplifier consists of a 12BY7 differential amplifier followed by a 6DJ8 cathode-follower, followed by a 6197 differential (common-cathode) output stage that drives the 200 ns L-C delay line, which drives the vertical deflection plates of the CRT.
Trigger pickoff is taken after the cathode follower stage in the vertical amplifier. There is a 6DJ8 differential trigger pickoff amplifier followed by half of a 6DJ8 a cathode follower, buffering the trigger signal.
The trigger circuit is a 6DJ8 trigger amplifier followed by a 6DJ8 Schmitt trigger. Triggering can be from the internal pickoff or from an external signal, or "line" trigger via a 6.3 V tap on the power transformer.
The 533 contains a 53 °C (128 °F) thermal cutoff. The high voltages for the CRT, +8,650 V and −1,350 V, are generated by a 60 kHz Hartley power oscillator and five 5642 high-voltage rectifier diode tubes.
Pictures
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front from different 533A
533A front
533A rear
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533A delay line
533A delay line
Some Parts Used in the 533
| Page | Class | Description | Used in |
|---|---|---|---|
| 120-037 | Discrete component | power transformer | 531 • 533 |
| 12BY7 | Vacuum Tube (Pentode) | miniature 6.5 W power pentode | 106 • 163 • 524 • 531 • 533 • 535 • 536 • 541 • 543 • 535 • 545 • 545A • 549 • 555 • 3A75 |
| 5642 | Vacuum Tube (Diode) | directly-heated high-voltage rectifier | 310 • 310A • 316 • 317 • 360 • 453 • 502 • 502A • 503 • 504 • 506 • 513 • 515 • 516 • 524 • 529 • RM529 • 533 • 533A • 535 • 536 • 543 • 543A • 543B • 545 • 545A • 545B • 547 • 551 • 555 • 556 • 567 • 575 • 581 • 581A • 585 • 585A • 647 |
| 6197 | Vacuum Tube (Pentode) | sharp-cutoff pentode | 516 • 531 • 533 • 535 • 535A • 556 • 3A75 |
| 6DJ8 | Vacuum Tube (Dual Triode) | dual triode | 80 • 132 • 161 • 310A • 316 • 317 • 3A75 • 502 • 502A • 503 • 504 • 515 • 516 • 519 • 526 • 529 • RM529 • 533 • 535 • 536 • 543 • 544 • 545 • 545A • 545B • 546 • 547 • 549 • 555 • 556 • 565 • 581 • 581A • 585 • 585A • 661 • 2A60 • 63 • 2A63 • 3A7 • 3A8 • 1121 • 1A4 • 67 • 81 • 82 • 86 • 3B1 • 3B4 • 1S1 • B • O • W • Z • Telequipment S32A • Telequipment D52 • Telequipment TD51 • Telequipment S52 • Telequipment S51 • Telequipment Type A |
| T5330 | CRT | 5" CRT | RM31A • RM33 • RM33A • RM35A • 531A • 533 • 533A • 535A |
Some Parts Used in the 533A
| Page | Class | Description | Used in |
|---|---|---|---|
| 5642 | Vacuum Tube (Diode) | directly-heated high-voltage rectifier | 310 • 310A • 316 • 317 • 360 • 453 • 502 • 502A • 503 • 504 • 506 • 513 • 515 • 516 • 524 • 529 • RM529 • 533 • 533A • 535 • 536 • 543 • 543A • 543B • 545 • 545A • 545B • 547 • 551 • 555 • 556 • 567 • 575 • 581 • 581A • 585 • 585A • 647 |
| T5330 | CRT | 5" CRT | RM31A • RM33 • RM33A • RM35A • 531A • 533 • 533A • 535A |