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discontinued=1974 |
discontinued=1974 |
manuals=
manuals=
 
* [[Media:Tektronix561ServiceManual.pdf | Tektronix 561 Manual (PDF)]]
* [[Media:Tektronix561_NO040267FieldModification.pdf | Tektronix 561 #040-267 Field Modification Instructions (PDF)]]
* [[Media:Tektronix561_NO040288FieldModification.pdf | Tektronix 561 #040-288 Field Modification Instructions (PDF)]]
* [[Media:Tektronix561_NO040347FieldModification.pdf | Tektronix 561 #040-347 Field Modification Instructions (PDF)]]
* [[Media:Tek 561 fcp.pdf|Tektronix 561 Factory Calibration Procedure (PDF, needs OCR)]]
* [http://w140.com/tek_rm561.pdf Tektronix RM561 Manual (PDF)]
* [http://w140.com/tek_rm561.pdf Tektronix RM561 Manual (PDF)]
* [http://w140.com/mmm/tek-561a.pdf Tektronix 561A Manual (PDF)]
* [http://w140.com/mmm/tek-561a.pdf Tektronix 561A Manual (PDF)]
* [[Media:070-469.pdf|Tektronix 561A Calibration Procedure (PDF)]]
* [[Media:Tek 561a fcp april 1967.pdf|Tektronix 561A Factory Calibration Procedure (PDF, needs OCR)]]
* [http://bama.edebris.com/download/tek/561a/561a.djvu Tektronix 561A Manual (BAMA, DjVu)]
* [[Media:Tek 561a field recal proc sep 1962.pdf | Tektronix 561A Field Recalibration Procedure, September 1962 (PDF, needs OCR)]]
* [[Media:Tek 561b fcp.pdf|Tektronix 561B Factory Calibration Procedure (PDF, needs OCR)]]
* [[Media:Tek 561A manufacturing memos late 1964.pdf]]
* [http://w140.com/mmm/tek-561b.pdf Tektronix 561B Manual (PDF)]
* [http://w140.com/mmm/tek-561b.pdf Tektronix 561B Manual (PDF)]
* [http://bama.edebris.com/download/tek/561b/561b.djvu Tektronix 561B Manual (BAMA, DjVu)]
* [[Media:Tek 561b mod 272c.pdf|Tektronix 561B Mod 272C]]
* [http://bama.edebris.com/download/tek/561/561scope.pdf Tektronix RM561A & RM561B Manual (BAMA, PDF)]
* [http://w140.com/tek-561s.pdf Tektronix 561S Manual (PDF)]
* [http://w140.com/tek-561s.pdf Tektronix 561S Manual (PDF)]
* [[Media:Tek 561s fcp jan 1964.pdf | Tektronix 561S Factory Calibration Procedure, January 1964 (PDF, needs OCR)]]
* [http://w140.com/tek_561_irb.pdf Tektronix 561 Instrument Reference Book (OCR, PDF)]
* [http://w140.com/tek_560_561_product_release.pdf Tektronix 560 and 561 Product Release (PDF)]
* [http://w140.com/tek_560_561_product_release.pdf Tektronix 560 and 561 Product Release (PDF)]
* [http://bama.edebris.com/download/tek/561/561scope.pdf Tektronix 561 Manual (BAMA, PDF, offline?)]
 
* [http://bama.edebris.com/download/tek/561a/561a.djvu Tektronix 561A Manual (BAMA, offline?, DjVu)]
}}
* [http://bama.edebris.com/download/tek/561b/561b.djvu Tektronix 561B Manual (BAMA, offline?, DjVu)]}}
The '''Tektronix 561''' is a [[560-series_scopes|560-series scope]] that was [[introduced in 1961]] and
The '''Tektronix 561''' is a [[560-series_scopes|560-series scope]] that was [[introduced in 1961]] and
produced in various versions well into the 1970's.   
produced in various versions well into the 1970s.   


==Versions==
==Versions==
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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.
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.
The 561 uses the [[T5032]] CRT, which has a glass envelope.
 
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 200μV to 100V.
 
Early serial numbers of the 561 use a neon bulb (B633) in the -100V 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.


===561A===
===561A===
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side of the faceplate, totally eliminating parallax errors, and allowing for better  
side of the faceplate, totally eliminating parallax errors, and allowing for better  
edge illumination.  
edge illumination.  
The 561A supports all 2 and 3 series plug-ins. 
The popular 60 and 70 series plug-ins were renamed
by adding a “2A, 2B, 3A, or 3B” in front to the two digit model number. 
New 3 series plug-ins were also added which consume
more power than the original 60 and 70 series. 
Due to the higher power consumption,
these newer plug-ins can not be used in the original 561. 
The highest bandwidth plug-ins gave a system bandwidth of 10 MHz.


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]] package.
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===561B===
===561B===
The 561B / RM561B were [[introduced in 1969]].
The 561B / RM561B were [[introduced in 1969]].
The B models actually provided no performance improvements over the 561A,  
The 561B uses the same [[560-series plug-ins]] used by the 561A.
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.   
with the change being limited to all solid state design, including the HV rectifiers.   
While this improves reliability of the mainframe,  
While this change improves reliability of the mainframe,  
no all solid state plug-ins were ever designed. 
Tektronix never produced fully solid state amplifier or non-sampling timebase plug-ins for the 560 Series.
The 561B uses the same 2 and 3 series plug-ins used by the 561A.


===561S===
===561S===
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Also, the scale was reduced from 8 × 10 divisions to 6 × 10.
Also, the scale was reduced from 8 × 10 divisions to 6 × 10.
The 561S has no post-deflection acceleration, and a CRT cathode
The 561S has no post-deflection acceleration, and a CRT cathode
voltage of -3300 V, like the other 561 models.
voltage of -3,300 V, like the other 561 models.


==Specifications==
===Plugin Compatibility=== 
[[Category:Specifications needed]]
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 561A, RM561A, 561B, and RM561B are compatible with all of the 2 and 3-series plugins that Tektronix made. The 561 and RM561 have limited compatibility with some 3-series plugins, mainly due to the CRT circuit. 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. 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 +6V 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).
 
{{BeginSpecs}}
{{SpecGroup | 561 }}
{{Spec | Bandwidth |  DC to  4 MHz (with [[3A75]], may vary with other plug-ins)  }}
{{Spec | Rise time | 0.09 μs }}
{{Spec | Power Consumption | 185 W with [[72]] & [[67]] plug-ins}}
 
{{SpecGroup | 561A & 561B }}
{{Spec | Bandwidth | DC to  15 MHz (with [[3A5]], may vary with other plug-ins)  }}
{{Spec | Rise time | 0.024 μs }}
 
{{Spec | Power Consumption | 178 W with plug-ins }}
{{SpecGroup | 561S }}
{{Spec | Bandwidth | DC to  25 MHz (with [[3A1S]], may vary with other plug-ins)  }}
{{Spec | Rise time | 0.014 μs }}
{{Spec | Power Consumption | 210 W to 240 W with plug-ins }}
 
{{SpecGroup | all}}
{{Spec | Line Voltage | 105-125/210-250 V<sub>AC</sub> ±10%, selected via primary voltage selector and voltage range selector switches, 50 Hz to 60 Hz. }}
{{Spec | Thermal Protection | Automatic resetting thermal cutout, in case internal temperature exceeds safe operating level }}
{{Spec | Anode Potential | 3.5 kV}}
{{Spec | Screen Area | 8 cm × 10 cm ( 561S: 6 cm x 10 cm ) }}
{{Spec | Construction  | Aluminum alloy chassis. Anodized front panel}}
{{EndSpecs}}


==Links==
==Links==
* [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==
==Pictures of 561 ==
<gallery>
<gallery>
Tek 561 trace.jpg|Tek 561 with camera mount
Tek 561 trace.jpg|Tek 561 with camera mount
561 Front.jpeg|Tek 561 with round CRT and external graticule
561 Left.jpeg|Left side of the scope
561 Right.jpeg|Right side of the scope
561 Back.jpeg|Back of the scope
561 PSU.jpg|Powersupply
561 LeftClose.jpg|Powersupply tubes
561 PSU LV.jpg|Low voltage powersupply
561 PSU HV.jpg|High voltage powersupply
561 HVCover.jpg|High voltage powersupply cover
561 BayConnector.jpg|Plugin connector
561 Calibrator.jpg|Calibrator circuit
561 FrontControls.jpeg|Calibrator
561 CRTNeck.jpg|Deflection plate connections
561 CRTSocket.jpg|CRT socket
</gallery>
==Pictures of 561A==
<gallery>
561a.jpg | 561A
561a.jpg | 561A
561a-2.jpg | 561A
561a-2.jpg | 561A
File:Tek 561b 1.JPG|561B
Tek 561a left front.jpg|561A
File:Tek 561b 2.JPG|561B
Tek 561a guernsey.jpg|Guernsey-made 561A with a [[3L5]] and a Guernsey-made [[3B3]]
File:Tek 561b 3.JPG|561B
Tek 561a guernsey rear.jpg|Guernsey-made 561A, rear view
File:Tek 561b 4.JPG|561B
Tek 561a left internal.jpg|561A (plug-in missing tubes)
File:Tek rm561.jpg |Tek RM561 with two [[75|Type 75]] (3A75) amplifier plugins
Tek 561a right internal.jpg|561A
File:RM561A.JPG|Tek RM561A with [[3A74]] and [[2B67]] plugins
Tek 561a lvps schem.png|561A Low Voltage Power Supply
File:LINC console.jpg | RM561A in LINC computer console
Tek 561a crt schem.png|561A CRT Circuit
File:Tek 561s.jpg|Tek 561S
</gallery>
 
==Pictures of 561B==
<gallery>
Tek 561b 1.JPG|561B
Tek 561b 2.JPG|561B
Tek 561b 3.JPG|561B
Tek 561b 4.JPG|561B
Tek 561b 3a7 3b4.jpg|561B with [[3A7]] and [[3B4]]
Tek 561b trace.jpg|561B trace
561b_inside_right.jpg | right inside
561b_inside_left.jpg | left inside
561b_inside_top.jpg | top inside
Tek r561b.jpg|R561B
</gallery>
 
==Pictures of 561S ==
<gallery>
 
Tek 561s.jpg|Tek 561S
Tek 561s 3a1s 3b1s.jpg|561S with [[3A1S]] and [[3B1S]]
Tek 561s 3a1s 3b1s.jpg|561S with [[3A1S]] and [[3B1S]]
Tek 561s rear.jpg|561S rear
Tek 561s rear.jpg|561S rear
File:Tek 3a1s 3b1s.jpg| [[3A1S]] and [[3B1S]] plugins
Tek 3a1s 3b1s.jpg| [[3A1S]] and [[3B1S]] plugins
Tek 561a guernsey.jpg|Guernsey-made 561A with a [[3L5]] and a Guernsey-made [[3B3]]
</gallery>
Tek 561a guernsey rear.jpg|Guernsey-made 561A, rear view
==Pictures of RM561(A) ==
Tek rm561a 2a63 2b67.jpg|RM561 with [[2A63]] and [[2B67]]
<gallery>
Tek rm561.jpg |Tek RM561 with two [[75|Type 75]] (3A75) amplifier plugins
RM561A.JPG|Tek RM561A with [[3A74]] and [[2B67]] plugins
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
</gallery>
</gallery>


[[Category:560 series scopes]]
[[Category:560 series scopes]]
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