551: Difference between revisions

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The Tektronix Type 551, [[introduced in 1958]],  
{{Oscilloscope Sidebar |
is a 27MHz [[dual-beam scopes|dual-beam scope]] that takes  
title=Tektronix 551 |
two [[letter-series and 1-series plug-ins]].   
summary=27 MHz scope |
image=551 front.jpg |
caption=Tektronix 551 |
years=1958 - ? |
manuals=
* [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://www.wellenkino.de/551 Martin Mehlhose's 551 Page]
}}
The '''Tektronix Type 551''', [[introduced in 1958]],  
is a 27 MHz [[dual-beam scopes|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  
Unlike the [[555]], it has only one set of horizontal deflection plates and  
the trigger and sweep circuitry are built in to the mainframe.   
the trigger and sweep circuitry are built in to the mainframe.   
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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 from 10kV to 12kV.  This improved trace visibility at high sweep rates.
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 [[Connectors#UHF|UHF connectors]].  Many were converted in the field to use [[Connectors#BNC|BNC connectors]].
Early 551 units used [[Connectors#UHF|UHF connectors]].  Many were converted in the field to use [[Connectors#BNC|BNC connectors]].
==Specifications==


{| border="1" style="text-align: center;"
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==Pictures==


* [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://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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File:Wellenkino 551.jpg
File:Wellenkino 551.jpg
</gallery>
</gallery>


[[Category:500 series scopes]]
[[Category:500 series scopes]]
[[Category:Dual beam scopes]]

Revision as of 06:59, 5 July 2014

{{{manufacturer}}} 
27 MHz scope
Tektronix 551

Produced from to

Manuals
Manuals – Specifications – Links – Pictures

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.

Specifications

Comparison of 551 with 555
551 555
Risetime with Type K 14ns 12ns
Acceleration Voltage 10kV 10kV
Filament Regulation none saturable core reactor
Price in 1965 $1850 $2650
Indicator Weight 52 pounds 68 pounds
Power Supply Weight 42 pounds 45 pounds
Power Consumption 850 watts 1050 watts

Pictures