561: Difference between revisions

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discontinued=1974 |
discontinued=1974 |
manuals=
manuals=
* [[Media:Tektronix561ServiceManual.pdf | Tektronix 561 Manual (PDF)]]
'''561, RM561'''
* [[Media:Tektronix561_NO040267FieldModification.pdf | Tektronix 561 #040-267 Field Modification Instructions (PDF)]]
* [[Media:070-261.pdf|Tektronix 561 Manual]] (PDF)
* [[Media:Tektronix561_NO040288FieldModification.pdf | Tektronix 561 #040-288 Field Modification Instructions (PDF)]]
* [[Media:070-289.pdf|Tektronix RM561 Manual]] (PDF, OCR)
* [[Media:Tektronix561_NO040347FieldModification.pdf | Tektronix 561 #040-347 Field Modification Instructions (PDF)]]
 
'''561A'''
* [[Media:070-342.pdf|Tektronix 561A Manual]] (PDF)
* [https://bama.edebris.com/download/tek/561a/561a.djvu Tektronix 561A Manual @ BAMA] (DjVu)
 
'''561B, RM561A/B'''
* [https://w140.com/mmm/tek-561b.pdf Tektronix 561B Manual (PDF)]
* [[Media:TM 9-6625-963-14-1.pdf|Military Tektronix RM561A & RM561B Manual]] (PDF)
* 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]
 
'''561S'''
* [https://w140.com/tek-561s.pdf Tektronix 561S Manual (PDF)]
 
<small>
'''Calibration'''
* [[Media:Tek 561 fcp.pdf|Tektronix 561 Factory Calibration Procedure (PDF, needs OCR)]]
* [[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/mmm/tek-561a.pdf Tektronix 561A Manual (PDF)]
* [[Media:070-469.pdf|Tektronix 561A Calibration Procedure (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)]]
* [[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 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 561b fcp.pdf|Tektronix 561B Factory Calibration Procedure (PDF, needs OCR)]]
* [[Media:Tek 561s fcp jan 1964.pdf | Tektronix 561S Factory Calibration Procedure, January 1964 (PDF, needs OCR)]]
'''Modifications'''
* [[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 561b mod 272c.pdf|Tektronix 561B Mod 272C]]
'''Miscellaneous'''
* [[Media:Tek 561A manufacturing memos late 1964.pdf]]
* [[Media:Tek 561A manufacturing memos late 1964.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)]
* [[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_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)]
 
</small>
}}
}}
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 1970s.   
produced in various versions well into the 1970s.   


==Versions==
==Versions==
Over its life, the 561 was actually a series of four very different scopes,  
Over its life, the 561 was actually a series of four very different scopes, plus the rack mount versions of each.   
plus the rack mount versions of each.   


===561===
===561===
Line 42: Line 54:
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. 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 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.
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.


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.
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.


===561A===
===561A===
Line 50: Line 64:
The 561A were the highest selling model in the 560 series.   
The 561A were the highest selling model in the 560 series.   


They introduced a revolutionary new CRT, the [[T5610]], incorporating many “firsts”  
They introduced a revolutionary new CRT, the [[T5610]], incorporating many “firsts” that would remain through most of Tek's analog scopes to follow –  
that would remain through most of Tek's analog scopes to follow – a rectangular faceplate
a rectangular faceplate allowing for a more compact CRT, and a ceramic CRT envelope which provided more mechanical precision than a blown glass tube.   
allowing for a more compact CRT, and a ceramic CRT envelope which provided more mechanical
This also enabled the use of a separate face plate made from a flat glass panel that could have the graticule markings printed on the [[phosphor]]  
precision than a blown glass tube.  This also enabled the use of a separate face plate made
side of the faceplate, totally eliminating parallax errors, and allowing for better edge illumination.  
from a flat glass panel that could have the graticule markings printed on the [[phosphor]]  
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]] package.
Line 65: Line 76:
The 561B / RM561B were [[introduced in 1969]].
The 561B / RM561B were [[introduced in 1969]].
The 561B uses the same [[560-series plug-ins]] used by 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,  
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 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.


===561S===
===561S===
A special 561S was introduced as a special product, modified from a 561A.
A special 561S was introduced as a special product, modified from a 561A. It did not appear in any Tek catalog.   
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
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.   
because the T5033 CRT has higher deflection sensitivity than the CRT used in
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 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 higher bandwidth of the 561S came at the expense of  
The higher bandwidth of the 561S came at the expense of trading off some of the advances gained in the original 561A.   
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.
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.
The 561S has no post-deflection acceleration, and a CRT cathode
voltage of -3,300 V, like the other 561 models.


===Plugin Compatibility===   
===Plugin Compatibility===   
Line 94: Line 94:
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 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).
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 +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).


{{BeginSpecs}}
{{BeginSpecs}}

Revision as of 07:35, 20 August 2021

Tektronix 561
10(4) MHz "General Purpose Scope"
Tektronix 561B

Produced from 1961 to 1974

Manuals

561, RM561

561A

561B, RM561A/B

561S

Calibration

Modifications

Miscellaneous

(All manuals in PDF format unless noted otherwise)
Manuals – Specifications – Links – Pictures

The Tektronix 561 is a 560-series scope that was introduced in 1961 and produced in various versions well into the 1970s.

Versions

Over its life, the 561 was actually a series of four very different scopes, plus the rack mount versions of each.

561

The original 561 and RM561 were introduced in 1961. 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.

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.

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.

561A

The short lived 561 was replaced by the 561A and the rack-mount version RM561A in 1962. The 561A were the highest selling model in the 560 series.

They introduced a revolutionary new CRT, the T5610, incorporating many “firsts” that would remain through most of Tek's analog scopes to follow – a rectangular faceplate allowing for a more compact CRT, and a ceramic CRT envelope which provided more mechanical precision than a blown glass tube. This also enabled the use of a separate face plate made from a flat glass panel that could have the graticule markings printed on the phosphor 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.

An RM561A with two custom plug-ins was incorporated (upside-down) as the standard display in the LINC computer.

561B

The 561B / RM561B were introduced in 1969. 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. 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.

561S

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.

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 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. 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.

Plugin Compatibility

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 +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).

Key Specifications

     — 561 —
Bandwidth DC to 4 MHz (with 3A75, may vary with other plug-ins)
Rise time 0.09 μs
Power Consumption 185 W with 72 & 67 plug-ins
     — 561A & 561B —
Bandwidth DC to 15 MHz (with 3A5, may vary with other plug-ins)
Rise time 0.024 μs
Power Consumption 178 W with plug-ins
     — 561S —
Bandwidth DC to 25 MHz (with 3A1S, may vary with other plug-ins)
Rise time 0.014 μs
Power Consumption 210 W to 240 W with plug-ins
     — all —
Line Voltage 105-125/210-250 VAC ±10%, selected via primary voltage selector and voltage range selector switches, 50 Hz to 60 Hz.
Thermal Protection Automatic resetting thermal cutout, in case internal temperature exceeds safe operating level
Anode Potential 3.5 kV
Screen Area 8 cm × 10 cm ( 561S: 6 cm x 10 cm )
Construction Aluminum alloy chassis. Anodized front panel

Links

Pictures of 561

  • Tek 561 with camera mount

    Tek 561 with camera mount

  • Tek 561 with round CRT and external graticule

    Tek 561 with round CRT and external graticule

  • Left side of the scope

    Left side of the scope

  • Right side of the scope

    Right side of the scope

  • Back of the scope

    Back of the scope

  • Powersupply

    Powersupply

  • Powersupply tubes

    Powersupply tubes

  • Low voltage powersupply

    Low voltage powersupply

  • High voltage powersupply

    High voltage powersupply

  • High voltage powersupply cover

    High voltage powersupply cover

  • Plugin connector

    Plugin connector

  • Calibrator circuit

    Calibrator circuit

  • Calibrator

    Calibrator

  • Deflection plate connections

    Deflection plate connections

  • CRT socket

    CRT socket

Pictures of 561A

  • 561A

    561A

  • 561A

    561A

  • 561A

    561A

  • Guernsey-made 561A with a 3L5 and a Guernsey-made 3B3

    Guernsey-made 561A with a 3L5 and a Guernsey-made 3B3

  • Guernsey-made 561A, rear view

    Guernsey-made 561A, rear view

  • 561A (plug-in missing tubes)

    561A (plug-in missing tubes)

  • 561A

    561A

  • 561A Low Voltage Power Supply

    561A Low Voltage Power Supply

  • 561A CRT Circuit

    561A CRT Circuit

Pictures of 561B

  • 561B

    561B

  • 561B

    561B

  • 561B

    561B

  • 561B

    561B

  • 561B with 3A7 and 3B4

    561B with 3A7 and 3B4

  • 561B trace

    561B trace

  • right inside

    right inside

  • left inside

    left inside

  • top inside

    top inside

  • R561B

    R561B

Pictures of 561S

Pictures of RM561(A)

  • Tek RM561 with two Type 75 (3A75) amplifier plugins

    Tek RM561 with two Type 75 (3A75) amplifier plugins

  • Tek RM561A with 3A74 and 2B67 plugins

    Tek RM561A with 3A74 and 2B67 plugins

  • RM561A with 2A63 and 2B67

    RM561A with 2A63 and 2B67

  • RM561A top inside

    RM561A top inside

  • RM561A in LINC computer console

    RM561A in LINC computer console

  • RM561A with 3B3 and 3A74

    RM561A with 3B3 and 3A74

  • RM561 with 3A1 and 3B4 from NASA AMES

    RM561 with 3A1 and 3B4 from NASA AMES

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