551: Difference between revisions
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The 551 uses an L-C [[delay line]] for each vertical channel. | The 551 uses an L-C [[delay line]] for each vertical channel. | ||
A factory modification, MOD 108A, was available for increasing the CRT acceleration voltage. This improved trace visibility at high sweep rates. | A factory modification, MOD 108A, was available for increasing the CRT acceleration voltage from 10kV to 12kV. This improved trace visibility at high sweep rates. | ||
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* [http://bama.edebris.com/download/tek/551/Tek%20551.pdf Tektronix 551 Manual (PDF)] | * [http://bama.edebris.com/download/tek/551/Tek%20551.pdf Tektronix 551 Manual (PDF)] | ||
* [http://w140.com/tek_fcp/tek_551_fac_cal.pdf Tektronix 551 Factory Calibration Procedure (PDF)] | * [http://w140.com/tek_fcp/tek_551_fac_cal.pdf Tektronix 551 Factory Calibration Procedure (PDF)] | ||
* [http://www.wellenkino.de/551 Martin Mehlhose's 551 Page] | |||
<gallery> | <gallery> | ||
Image:551_front.jpg|Front view. | Image:551_front.jpg|Front view. | ||
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Image:Tek 551 block.png|block diagram | Image:Tek 551 block.png|block diagram | ||
Image:Tek 551 ps bottom.jpg|bottom of power supply | Image:Tek 551 ps bottom.jpg|bottom of power supply | ||
File:1-551 001.jpg|Tek 551 Mod 108A | |||
File:1-551 004.jpg|551 with Mod 108A | |||
</gallery> | </gallery> | ||
Revision as of 15:30, 4 August 2012
The Tektronix Type 551, introduced in 1958, is a 27MHz dual-beam scope that takes two letter-series and 1-series plug-ins. Unlike the 555, it has only one set of horizontal deflection plates and the trigger and sweep circuitry are built in to the mainframe. Like the 555, the 551 has an external power supply unit. The external power supplies of the 555 and 551 are not interchangeable. The vertical amplifiers of the 545A, 551, and 555 are identical.
The 551 uses an L-C delay line for each vertical channel.
A factory modification, MOD 108A, was available for increasing the CRT acceleration voltage from 10kV to 12kV. This improved trace visibility at high sweep rates.
| 551 | 555 | |
|---|---|---|
| Risetime with Type K | 14ns | 12ns |
| Acceleration Voltage | 10kV | 10kV |
| Price in 1965 | $1850 | $2650 |
| Indicator Weight | 52 pounds | 68 pounds |
| Power Supply Weight | 42 pounds | 45 pounds |
| Power Consumption | 850 watts | 1050 watts |
- Tektronix 551 Manual (PDF)
- Tektronix 551 Factory Calibration Procedure (PDF)
- Martin Mehlhose's 551 Page
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Front view.
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External power supply.
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Left side.
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Right side.
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Top view.
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Block diagram
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Vertical amplifier
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trigger schematic
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block diagram
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bottom of power supply
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Tek 551 Mod 108A
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551 with Mod 108A
