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{{Oscilloscope Sidebar |manufacturer=Tektronix |designers= |series=560-series scopes|
{{Oscilloscope Sidebar
model= 561 |
|manufacturer=Tektronix
image=Tek 561b cal trace.jpg |
|series=560-series scopes
summary=10(4) MHz "General Purpose Scope" |
|model=561
caption=Tektronix 561B |
|image=Tek 561b cal trace.jpg
introduced=1961 |
|summary=10(4) MHz "General Purpose Scope"
discontinued=1974 |
|caption=Tektronix 561B
manuals=
|introduced=1961
|discontinued=1974
|designers=Bob Shand;
|manuals=
'''561, RM561'''
'''561, RM561'''
* [[Media:070-261.pdf|Tektronix 561 Manual]] (PDF)
* [[Media:070-261.pdf|Tektronix 561 Manual]]
* [[Media:070-289.pdf|Tektronix RM561 Manual]] (PDF, OCR)
* [[Media:070-289.pdf|Tektronix RM561 Manual]] (OCR)


'''561A'''
'''561A'''
* [[Media:070-342.pdf|Tektronix 561A Manual]] (PDF)
* [[Media:070-342.pdf|Tektronix 561A Manual]]
* [https://bama.edebris.com/download/tek/561a/561a.djvu Tektronix 561A Manual @ BAMA] (DjVu)
<small>* '''Alternate:''' [https://bama.edebris.com/download/tek/561a/561a.djvu DjVu @ BAMA]


'''561B, RM561A/B'''
'''561B, RM561A/B'''
* [https://w140.com/mmm/tek-561b.pdf Tektronix 561B Manual (PDF)]
* [[Media:070-0352-01.pdf|RM561A manual 070-0352-01 needed]]
* [[Media:TM 9-6625-963-14-1.pdf|Military Tektronix RM561A & RM561B Manual]] (PDF)
* [[Media:070-0802-00.pdf|Tektronix 561B Manual]]
* Tektronix RM561A & RM561B Manual @ BAMA: [https://bama.edebris.com/download/tek/561b/561b.djvu DjVu] / [https://bama.edebris.com/download/tek/561/561scope.pdf PDF]
* [[Media:TM 9-6625-963-14-1.pdf|Military Tektronix RM561A & RM561B Manual]]
<small>* '''Alternate:''' RM561A & RM561B [https://bama.edebris.com/download/tek/561b/561b.djvu DjVu @ BAMA] / [https://bama.edebris.com/download/tek/561/561scope.pdf PDF @ BAMA]</small>


'''561S'''
'''561S'''
* [[Media:070-417.pdf|Tektronix 561S Manual]] (PDF)
* [[Media:070-417.pdf|Tektronix 561S Manual]]


<small>
<small>
'''Calibration'''
'''Calibration'''
* [[Media:Tek 561 fcp.pdf|Tektronix 561 Factory Calibration Procedure (PDF, needs OCR)]]
* [[Media:Tek 561 fcp.pdf|Tektronix 561 Factory Calibration Procedure]]
* [[Media:070-469.pdf|Tektronix 561A Calibration Procedure (PDF)]]
* [[Media:070-469.pdf|Tektronix 561A Calibration Procedure]]
* [[Media:Tek 561a fcp april 1967.pdf|Tektronix 561A Factory Calibration Procedure (PDF, needs OCR)]]
* [[Media:Tek 561a fcp april 1967.pdf|Tektronix 561A Factory Calibration Procedure]]
* [[Media:Tek 561a field recal proc sep 1962.pdf | Tektronix 561A Field Recalibration Procedure, September 1962 (PDF, needs OCR)]]
* [[Media:Tek 561a field recal proc sep 1962.pdf | Tektronix 561A Field Recalibration Procedure, September 1962]]
* [[Media:Tek 561b fcp.pdf|Tektronix 561B Factory Calibration Procedure (PDF, needs OCR)]]
* [[Media:Tek 561b fcp.pdf|Tektronix 561B Factory Calibration Procedure]]
* [[Media:Tek 561s fcp jan 1964.pdf | Tektronix 561S Factory Calibration Procedure, January 1964 (PDF, needs OCR)]]
* [[Media:Tek 561s fcp jan 1964.pdf | Tektronix 561S Factory Calibration Procedure, January 1964]]


'''Modifications'''
'''Modifications'''
* [[Media:Tektronix561_NO040267FieldModification.pdf | Tektronix 561 #040-267 Field Modification Instructions (PDF)]]
* [[Media:Tektronix561_NO040267FieldModification.pdf | Tektronix 561 #040-267 Field Modification Instructions]]
* [[Media:Tektronix561_NO040288FieldModification.pdf | Tektronix 561 #040-288 Field Modification Instructions (PDF)]]
* [[Media:Tektronix561_NO040288FieldModification.pdf | Tektronix 561 #040-288 Field Modification Instructions]]
* [[Media:Tektronix561_NO040347FieldModification.pdf | Tektronix 561 #040-347 Field Modification Instructions (PDF)]]
* [[Media:Tektronix561_NO040347FieldModification.pdf | Tektronix 561 #040-347 Field Modification Instructions]]
* [[Media:Tek_561A_mod210C.pdf|Tektronix 561A Mod 210C]]
* [[Media:Tek 561b mod 272c.pdf|Tektronix 561B Mod 272C]]
* [[Media:Tek 561b mod 272c.pdf|Tektronix 561B Mod 272C]]


'''Miscellaneous'''
'''Miscellaneous'''
* [[Media:Tek 561A manufacturing memos late 1964.pdf]]
<!-- * [[Media:Tek 561A manufacturing memos late 1964.pdf]] missing-->
* [http://w140.com/tek_561_irb.pdf Tektronix 561 Instrument Reference Book (OCR, PDF)]
* [[Media:tek_561_irb.pdf|Tektronix 561 Instrument Reference Book]] (OCR)
* [http://w140.com/tek_560_561_product_release.pdf Tektronix 560 and 561 Product Release (PDF)]
* [[Media:tek_560_561_product_release.pdf|Tektronix 560 and 561 Product Release]]
</small>
</small>
}}
}}
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The original 561 and RM561 were introduced in 1961.   
The original 561 and RM561 were introduced in 1961.   
Similar to the 560, also [[introduced in 1961]], the 561 has a round CRT.   
Similar to the 560, also [[introduced in 1961]], the 561 has a round CRT.   
It supports the 50, 60 and 70 series of plug-ins, with the highest system bandwidth of 4 MHz. Some later plugins intended for use with the 561A or 561B have higher power requirements and may not be compatible with the 561.
It supports the 50, 60 and 70 series of plug-ins, with the highest system bandwidth of 4 MHz.  
The later 2- and 3- series plug-ins cannot be used in the 560 or 561, as they consume more power.
Early, low power, plugins have the nylon guide on their backplane pointing into the plugin, while the later, higher power consuming, plugins have those nylon guides pointing outward.
The outward pointing guide will bump into the chassis of a 560 or 561, preventing it from fully inserting.
The 561A and all later 560 series scopes, with higher capability power supplies, have a hole in the chassis that allows the outward pointing nylon guide to clear, allowing full insertion.


The 561 uses the [[T5032]] CRT, which has a glass envelope. The 561 and later versions also had a front panel calibrator signal for calibrating the plugins to the mainframe.  
The 561 uses the [[T5032]] CRT, which has a glass envelope. The 561 and later versions also had a front panel calibrator signal for calibrating the plugins to the mainframe.  
The 561 calibrator has 18 attenuation steps and can output a square wave with an amplitude of 200 μV to 100 V.
The 561 calibrator has 18 attenuation steps and can output a square wave with an amplitude of 200 μV to 100 V.


Early serial numbers of the 561 use a neon bulb (B633) in the -100 V regulator circuit, however, later versions (including the 561A and later) used a transistor.  
Early serial numbers of the 561 use a neon bulb (B633) in the -100 V regulator circuit, however, later versions (including the 561A and later) used a transistor.  
The modification for early units is documented at the end of the 561 manual and in the 040-288 Field Modification Instructions.
The modification for early units is documented at the end of the 561 manual and in the 040-288 Field Modification Instructions.
{{Documents|Link=561}}


===561A===
===561A===
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side of the faceplate, totally eliminating parallax errors, and allowing for better edge illumination.  
side of the faceplate, totally eliminating parallax errors, and allowing for better edge illumination.  


The 561A was one of the mainframes offered for the [[Engine Analyzer]] package.
The 561A was one of the mainframes offered for the [[Engine Analyzer System]].


An RM561A with two custom plug-ins was incorporated (upside-down) as the standard display in the [http://en.wikipedia.org/wiki/LINC LINC] computer.
An RM561A with two custom plug-ins was incorporated (upside-down) as the standard display in the [http://en.wikipedia.org/wiki/LINC LINC] computer.
The Mod210C replaced the T5610 ceramic CRT with the T5032 glass CRT and an external graticule. The graticule illumination was changed to red and the BNC connectors of the scope and plugins were replaced with UHF connectors. The graticule has an engraved sinewave. A green light filter was added between the CRT and the graticule.
{{Documents|Link=561A}}


===561B===
===561B===
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The 561B models actually provided no performance improvements over the 561A, with the change being limited to all solid state design, including the HV rectifiers.   
The 561B models actually provided no performance improvements over the 561A, with the change being limited to all solid state design, including the HV rectifiers.   
While this change improves reliability of the mainframe, Tektronix never produced fully solid state amplifier or non-sampling timebase plug-ins for the 560 Series.
While this change improves reliability of the mainframe, Tektronix never produced fully solid state amplifier or non-sampling timebase plug-ins for the 560 Series.
{{Documents|Link=561B}}


===561S===
===561S===
A special 561S was introduced as a special product, modified from a 561A. It did not appear in any Tek catalog.   
A special 561S was introduced as a special product, modified from a 561A. It did not appear in any Tek catalog.   
With special modified amplifier and time base ([[3A1S]] and [[3B1S]]), and a special CRT ([[T5033]]), it achieved a 25 MHz system bandwidth, which is 2.5 times the bandwidth of a 561A.
With special modified amplifier and time base ([[3A1S]] and [[3B1S]]), and a special CRT ([[T5033]]), it achieved a 25 MHz system bandwidth, which is 2.5 times the bandwidth of a 561A.


The 3A1S and 3B1S were the only plug-ins that could be used in the 561S because the T5033 CRT has higher deflection sensitivity than the CRT used in the 561, 561A, and 561B.   
The 3A1S and 3B1S were the only plug-ins that could be used in the 561S because the T5033 CRT has higher deflection sensitivity than the CRT used in the 561, 561A, and 561B.   
The vertical deflection sensitivity of the T5033 is 11.7 V/cm. The 561A has the [[T561]] CRT which has a vertical deflection sensitivity of 19.5 V/cm.  
The vertical deflection sensitivity of the T5033 is 11.7 V/cm. The 561A has the [[T561]] CRT which has a vertical deflection sensitivity of 19.5 V/cm.  


The higher bandwidth of the 561S came at the expense of trading off some of the advances gained in the original 561A.   
The higher bandwidth of the 561S came at the expense of trading off some of the advances gained in the original 561A.   
The CRT is a conventional glass envelope, without internal graticule.   
The CRT is a conventional glass envelope, without internal graticule.   
Also, the scale was reduced from 8 × 10 divisions to 6 × 10. The 561S has no post-deflection acceleration, and a CRT cathode voltage of -3,300 V, like the other 561 models.
Also, the scale was reduced from 8 × 10 divisions to 6 × 10. The 561S has no post-deflection acceleration, and a CRT cathode voltage of -3,300 V, like the other 561 models.
{{Documents|Link=561S}}


===Plugin Compatibility===   
===Plugin Compatibility===   
The popular 60 and 70 series plug-ins were later given a “2A, 2B, 3A, or 3B” prefix.  
The popular 60 and 70 series plug-ins were later given a “2A, 2B, 3A, or 3B” prefix.  
The highest bandwidth plug-ins gave a system bandwidth of 10 MHz when used in the 561A and 561B.
The highest bandwidth plug-ins gave a system bandwidth of 10 MHz when used in the 561A and 561B.


The 561A, RM561A, 561B, and RM561B are compatible with all of the 2 and 3-series plugins that Tektronix made.  
The 561A, RM561A, 561B, and RM561B are compatible with all of the 2 and 3-series plugins that Tektronix made.  
Line 98: Line 113:
For plugins such as the 3B1 and 3B3 time bases there are issues with the blanking and intensified sweep.  
For plugins such as the 3B1 and 3B3 time bases there are issues with the blanking and intensified sweep.  
The 561A and subsequent models used a dual-secondary winding transformer in the CRT power supply, with one winding used in an intensifying pulse circuit which the original 561 lacked.  
The 561A and subsequent models used a dual-secondary winding transformer in the CRT power supply, with one winding used in an intensifying pulse circuit which the original 561 lacked.  
Other 3-series plugins may be used in the original 561 with some modifications – for example, to use a 3A74 4-channel vertical plugin in a 561 sn101to579, the +6 V unregulated supply needs to be disconnected from both plugin connectors (pin 18).  
Other 3-series plugins may be used in the original 561 with some modifications – for example, to use a 3A74 4-channel vertical plugin in a 561 sn101 to 579, the +6 V unregulated supply needs to be disconnected from both plugin connectors (pin 18).  
Later 561's with sn580 and higher already had this change implemented. More information regarding the use of 3-series plugins and the required modifications (if available) can be found in the Tektronix 561 Instrument Reference Book (IRB).
Later 561's with sn580 and higher already had this change implemented. More information regarding the use of 3-series plugins and the required modifications (if available) can be found in the Tektronix 561 Instrument Reference Book (IRB).


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{{Spec | Bandwidth |  DC to  4 MHz (with [[3A75]], may vary with other plug-ins)  }}
{{Spec | Bandwidth |  DC to  4 MHz (with [[3A75]], may vary with other plug-ins)  }}
{{Spec | Rise time | 0.09 μs }}
{{Spec | Rise time | 0.09 μs }}
{{Spec | Power Consumption | 185 W with [[72]] & [[67]] plug-ins}}
{{Spec | Power Consumption | 185 W with [[72]] & [[67]] plug-ins}}


{{SpecGroup | 561A & 561B }}
{{SpecGroup | 561A & 561B }}
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{{Spec | Rise time | 0.024 μs }}
{{Spec | Rise time | 0.024 μs }}


{{Spec | Power Consumption | 178 W with plug-ins }}
{{Spec | Power Consumption | 178 W with plug-ins }}
{{SpecGroup | 561S }}
{{SpecGroup | 561S }}
{{Spec | Bandwidth | DC to  25 MHz (with [[3A1S]], may vary with other plug-ins)  }}
{{Spec | Bandwidth | DC to  25 MHz (with [[3A1S]], may vary with other plug-ins)  }}
{{Spec | Rise time | 0.014 μs }}
{{Spec | Rise time | 0.014 μs }}
{{Spec | Power Consumption | 210 W to 240 W with plug-ins }}
{{Spec | Power Consumption | 210 W to 240 W with plug-ins }}


{{SpecGroup | all}}
{{SpecGroup | all}}
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{{Spec | Thermal Protection | Automatic resetting thermal cutout, in case internal temperature exceeds safe operating level }}
{{Spec | Thermal Protection | Automatic resetting thermal cutout, in case internal temperature exceeds safe operating level }}
{{Spec | Anode Potential | 3.5 kV}}
{{Spec | Anode Potential | 3.5 kV}}
{{Spec | Screen Area | 8 cm × 10 cm ( 561S: 6 cm x 10 cm ) }}
{{Spec | Screen Area | 8 cm × 10 cm ( 561S: 6 cm x 10 cm ) }}
{{Spec | Construction  | Aluminum alloy chassis. Anodized front panel}}
{{Spec | Construction  | Aluminum alloy chassis. Anodized front panel}}
{{EndSpecs}}
{{EndSpecs}}
Line 128: Line 143:
* [http://www.museum-nt.de/objekte/tek_561a.html 561A @ museum-nt.de]
* [http://www.museum-nt.de/objekte/tek_561a.html 561A @ museum-nt.de]


==Pictures of 561 ==
==Pictures==
===561===
<gallery>
<gallery>
Tek 561 trace.jpg|Tek 561 with camera mount
Tek 561 trace.jpg| 561 with Camera Mount
561 Front.jpeg|Tek 561 with round CRT and external graticule
561 Front.jpeg| 561 with Round CRT and External Graticule
561 Left.jpeg|Left side of the scope
561 Left.jpeg| 561 Left Side
561 Right.jpeg|Right side of the scope
561 Right.jpeg| 561 Right Side
561 Back.jpeg|Back of the scope
561 Back.jpeg         | 561 Rear
561 PSU.jpg|Powersupply
561 PSU.jpg           | 561 Power Supply
561 LeftClose.jpg|Powersupply tubes
561 LeftClose.jpg     | 561 Power Supply Tubes
561 PSU LV.jpg|Low voltage powersupply
561 PSU LV.jpg         | Low Voltage Power Supply
561 PSU HV.jpg|High voltage powersupply
561 PSU HV.jpg         | High Voltage Power Supply
561 HVCover.jpg|High voltage powersupply cover
561 HVCover.jpg       | High Voltage Power Supply Cover
561 BayConnector.jpg|Plugin connector
561 BayConnector.jpg   | Plugin Connector
561 Calibrator.jpg|Calibrator circuit
561 Calibrator.jpg     | Calibrator Circuit
561 FrontControls.jpeg|Calibrator
561 FrontControls.jpeg | Calibrator
561 CRTNeck.jpg|Deflection plate connections
561 CRTNeck.jpg| Deflection Plate Connections
561 CRTSocket.jpg|CRT socket
561 CRTSocket.jpg| CRT Socket
</gallery>
</gallery>


==Pictures of 561A==
===561A===
<gallery>
<gallery>
561a.jpg | 561A
561a.jpg                   | 561A
561a-2.jpg | 561A
561a-2.jpg                 | 561A
Tek 561a left front.jpg|561A
Tek 561a left front.jpg     | 561A Left Front
Tek 561a guernsey.jpg|Guernsey-made 561A with a [[3L5]] and a Guernsey-made [[3B3]]
Tek 561a guernsey.jpg       | Guernsey-made 561A with a [[3L5]] and a Guernsey-made [[3B3]]
Tek 561a guernsey rear.jpg|Guernsey-made 561A, rear view
Tek 561a guernsey rear.jpg | Guernsey-made 561A Rear
Tek 561a left internal.jpg|561A (plug-in missing tubes)
Tek 561a left internal.jpg | 561A (plug-in missing tubes)
Tek 561a right internal.jpg|561A
Tek 561a right internal.jpg | 561A Right Internals
Tek 561a lvps schem.png|561A Low Voltage Power Supply
Tek 561a lvps schem.png     | 561A Low Voltage Power Supply
Tek 561a crt schem.png|561A CRT Circuit
Tek 561a crt schem.png     | 561A CRT Circuit
Tek_561A_MOD210C_01.jpg    | 561A with Mod210C Power Off
Tek_561A_MOD210C_02.jpg    | 561A with Mod210C Graticule at 100% & Showing Signal
Tek_561A_MOD210C_04.jpg    | 561A with Mod210C Graticule at Right
Tek_561A_MOD210C_03.jpg    | 561A with Mod210C Comparing Sinewave Signal to the Engraved Signal
</gallery>
</gallery>


==Pictures of 561B==
===561B===
<gallery>
<gallery>
Tek 561b 1.JPG|561B
Tek 561b 1.JPG       | 561B
Tek 561b 2.JPG|561B
Tek 561b 2.JPG       | 561B
Tek 561b 3.JPG|561B
Tek 561b 3.JPG       | 561B
Tek 561b 4.JPG|561B
Tek 561b 4.JPG       | 561B
Tek 561b 3a7 3b4.jpg|561B with [[3A7]] and [[3B4]]
Tek 561b 3a7 3b4.jpg | 561B with [[3A7]] and [[3B4]]
Tek 561b trace.jpg|561B trace
Tek 561b trace.jpg   | 561B Trace
561b_inside_right.jpg | right inside
561b_inside_right.jpg | 561B Right Inside
561b_inside_left.jpg | left inside
561b_inside_left.jpg | 561B Left Inside
561b_inside_top.jpg | top inside
561b_inside_top.jpg   | 561B Top Inside
Tek r561b.jpg|R561B
Tek r561b.jpg         | R561B
</gallery>
</gallery>


==Pictures of 561S ==
===561S===
<gallery>
<gallery>
Tek 561s.jpg          | 561S
Tek 561s 3a1s 3b1s.jpg | 561S with [[3A1S]] and [[3B1S]]
Tek 561s rear.jpg      | 561S Rear
Tek 3a1s 3b1s.jpg      | [[3A1S]] and [[3B1S]] Plugins
</gallery>


Tek 561s.jpg|Tek 561S
Tek 561s 3a1s 3b1s.jpg|561S with [[3A1S]] and [[3B1S]]
Tek 561s rear.jpg|561S rear
Tek 3a1s 3b1s.jpg| [[3A1S]] and [[3B1S]] plugins
</gallery>
==Pictures of RM561(A) ==
==Pictures of RM561(A) ==
<gallery>
<gallery>
Tek rm561.jpg |Tek RM561 with two [[75|Type 75]] (3A75) amplifier plugins
Tek rm561.jpg |Tek RM561 with Two [[75|Type 75]] (3A75) Amplifier Plugins
RM561A.JPG|Tek RM561A with [[3A74]] and [[2B67]] plugins
RM561A.JPG| RM561A with [[3A74]] and [[2B67]] Plugins
Tek rm561a 2a63 2b67.jpg|RM561A with [[2A63]] and [[2B67]]
Tek rm561a 2a63 2b67.jpg| RM561A with [[2A63]] and [[2B67]]
Tek rm561a top inside.jpg|RM561A top inside
Tek rm561a top inside.jpg| RM561A Top Inside
LINC console.jpg | RM561A in LINC computer console
LINC console.jpg | RM561A in LINC Computer Console
RM561A with 3B3 and 3A74.jpg | RM561A with 3B3 and 3A74
RM561A with 3B3 and 3A74.jpg | RM561A with [[3B3]] and [[3A74]]
RM561 with 3A1 and 3B4 from NASA AMES.jpg | RM561 with 3A1 and 3B4 from NASA AMES
RM561 with 3A1 and 3B4 from NASA AMES.jpg | RM561 with [[3A1]] and [[3B4]] from NASA AMES
RM561_int_3.jpeg
RM561_int_2.jpeg
RM561_int_1.jpeg
</gallery>
</gallery>
==Components==


{{Parts|561}}
{{Parts|561}}
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