551: Difference between revisions
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<gallery> | <gallery> | ||
551_front.jpg|Front view.:551_ps.jpg|External power supply. | |||
551_leftint.jpg|Left side. | |||
551_rightint.jpg|Right side. | |||
551_top.jpg|Top view. | |||
551_PC_Front.jpg|front view. | |||
551_PC_Front-close.jpg|front view closeup. | |||
551_PC_Left.jpg|Left side. | |||
551_PC_Right.jpg|Right side. | |||
551_PC_Bottom.jpg|Bottom. | |||
551_PC_lower-amp.jpg|lower beam distributed amplifier. | |||
551_PC_Timebase.jpg|Timebase & calibration adjustments. | |||
551 block.gif|Block diagram | |||
551 vert.gif|Vertical amplifier | |||
Tek 551 trigger.png|trigger schematic | |||
Tek 551 high voltage section.png|CRT circuit | |||
Tek 551 block.png|block diagram | |||
Tek 551 ps bottom.jpg|bottom of power supply | |||
1-551 001.jpg|Tek 551 Mod 108A | |||
1-551 004.jpg|551 with Mod 108A | |||
Wellenkino 551.jpg | |||
Tek 551 2953 1.jpg | |||
Tek 551 2953 2.jpg | |||
Tek 551 2953 3.jpg | |||
Tek 551 2953 4.jpg | |||
Tek 551 2953 5.jpg | |||
Tek 551 2953 6.jpg | |||
Tek 551 2953 7.jpg | |||
Tek 551 2953 8.jpg | |||
Tek 551 2953 9.jpg | |||
Tek 551 2953 10.jpg | |||
Tek 551 2953 11.jpg | |||
</gallery> | </gallery> | ||
Revision as of 15:05, 12 November 2017
The Tektronix Type 551, introduced in 1958, is a 27 MHz 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 10 kV to 12 kV. This improved trace visibility at high sweep rates.
Early 551 units used UHF connectors. Many were converted in the field to use BNC connectors.
Key Specifications
CRT | T57 (T551) in early, T5511 in later (SN 2032+) models |
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551 | 555 | |
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Rise time with Type K | 14 ns | 12 ns |
Acceleration Voltage | 10 kV | 10 kV |
Filament Regulation | none | saturable core reactor |
Price in 1965 (2015 equiv.) |
$1,850 ($14,000) |
$2,650 ($20,100) |
Indicator Weight | 52 lb (23.6 kg) | 68 lb (30.8 kg) |
Power Supply Weight | 42 lb (19 kg) | 45 lb (20.4 kg) |
Power Consumption | 850 W | 1050 W |
Links
Pictures
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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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front view.
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front view closeup.
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Left side.
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Right side.
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Bottom.
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lower beam distributed amplifier.
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Timebase & calibration adjustments.
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Block diagram
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Vertical amplifier
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trigger schematic
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CRT circuit
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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
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