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Difference between revisions of "581"

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caption=Tektronix 581 (early model) |
 
caption=Tektronix 581 (early model) |
 
introduced=1959 |
 
introduced=1959 |
discontinued=(?) |
+
discontinued=1972 |
 
summary=100 MHz (85 MHz) oscilloscope|
 
summary=100 MHz (85 MHz) oscilloscope|
 
manuals=
 
manuals=
 
* [http://w140.com/tek_581_sn1273.pdf Tektronix 581 Manual (PDF)]
 
* [http://w140.com/tek_581_sn1273.pdf Tektronix 581 Manual (PDF)]
 
* [http://w140.com/581a_by_matt.pdf Tektronix 581A Manual (PDF)]
 
* [http://w140.com/581a_by_matt.pdf Tektronix 581A Manual (PDF)]
 +
* [[Media:Service Scope 39 Aug 1966.pdf|580 series gain adjustment procedure, in Service Scope 39, Aug 1966]]
 +
* [[Media:Tek 581a fcp dec 1968.pdf]]
 +
* [[Media:Tek 581a fcp march 1967.pdf]]
 
}}
 
}}
  
The '''Tektronix 581''' is a 100 MHz tube scope similar to the [[585]], but with simplified trigger and sweep circuitry.  
+
The '''Tektronix 581''' is a 100 MHz tube scope [[introduced in 1959]] as a single time base version of the [[585]].
 
Like all [[580-series_scopes|580-series scopes]], it uses [[580-series_plug-ins|580-series plug-ins]].
 
Like all [[580-series_scopes|580-series scopes]], it uses [[580-series_plug-ins|580-series plug-ins]].
It was [[introduced in 1959]].
+
 
 +
The 58x series were the first Tektronix scopes to use [[distributed deflection plates]] and the last to use [[distributed amplifier]]s for vertical deflection.
 +
At 100 MHz (down-rated to 95 MHz in 1962 and 85 MHz for the 581A) with the [[80|Type 80 plug-in]] and up to 85 MHz with the dual-channel [[82|Type 82]],
 +
they were the highest-speed general purpose scopes of Tek's tube scope era (the 1 GHz [[519]] was specialized with no vertical amplifier).
  
 
The vertical signal path of the 581 is the same as that of the 585.  It uses the [[T581]] CRT.   
 
The vertical signal path of the 581 is the same as that of the 585.  It uses the [[T581]] CRT.   
 
Type 581 scopes with serial numbers up to 510 use an all-tube trigger circuit.
 
Type 581 scopes with serial numbers up to 510 use an all-tube trigger circuit.
 
 
Starting at serial number 511, the 581 uses [[tunnel diodes|tunnel diode]] triggering.
 
Starting at serial number 511, the 581 uses [[tunnel diodes|tunnel diode]] triggering.
 
   
 
   
A Type 581A was introduced later, and it is specified to have a bandwidth of 85 MHz instead of 100 MHz.
+
A Type 581A was introduced in 1963, and it is specified to have a bandwidth of 85 MHz instead of 100 MHz.
 
The somewhat relaxed bandwidth specification improved CRT production yield which had been a problem when the scope  
 
The somewhat relaxed bandwidth specification improved CRT production yield which had been a problem when the scope  
 
was specified to 100 MHz.
 
was specified to 100 MHz.
 
The 580 series were the last Tektronix scopes to use [[distributed amplifier]]s for vertical deflection.
 
  
 
==Specifications==
 
==Specifications==
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==Pictures==
 
==Pictures==
 +
===581===
 +
<gallery>
 +
581_old_1.JPG                  | early 581
 +
581_old_2.JPG                  | wrinkle and chrome from early 581
 +
581_triggermods.JPG            | TD trigger instead of 6DJ8 trigger
 +
581_selenium.JPG                | Selenium rectifier
 +
</gallery>
 +
 +
===581A===
 
<gallery>
 
<gallery>
File:581_old_1.JPG  | early 581
+
Tek 581 1.jpg                   | 581A
File:581_old_2.JPG  | wrinkle and chrome from early 581.
+
Tek 581 2.jpg                   |
File:581_triggermods.JPG | TD trigger instead of 6DJ8 trigger.
+
Tek 581 3.jpg                   |
File:Tek 581 1.jpg
+
Tek 581 5.jpg                   |
File:Tek 581 2.jpg
 
File:Tek 581 3.jpg
 
File:Tek 581 5.jpg
 
File:Tek 581 early trig.png | early model 581 trigger using tubes
 
File:Tek 581 late trig.png  |late model 581 trigger using tunnel diode
 
File:Tek 581 vertical output amp.png | 581 vertical output amp ([[distributed amplifier]]) driving CRT
 
 
</gallery>
 
</gallery>
 +
 +
===Schematics===
 +
<gallery>
 +
Tek 581 early trig.png          | early model 581 trigger using tubes
 +
Tek 581 late trig.png          | late model 581 trigger using tunnel diode
 +
Tek 581 vertical output amp.png | 581 vertical output amp ([[distributed amplifier]]) driving CRT
 +
</gallery>
 +
  
  
 
[[Category:580 series scopes]]
 
[[Category:580 series scopes]]

Latest revision as of 09:55, 5 June 2019

Manuals – Specifications – Links – Pictures

The Tektronix 581 is a 100 MHz tube scope introduced in 1959 as a single time base version of the 585. Like all 580-series scopes, it uses 580-series plug-ins.

The 58x series were the first Tektronix scopes to use distributed deflection plates and the last to use distributed amplifiers for vertical deflection. At 100 MHz (down-rated to 95 MHz in 1962 and 85 MHz for the 581A) with the Type 80 plug-in and up to 85 MHz with the dual-channel Type 82, they were the highest-speed general purpose scopes of Tek's tube scope era (the 1 GHz 519 was specialized with no vertical amplifier).

The vertical signal path of the 581 is the same as that of the 585. It uses the T581 CRT. Type 581 scopes with serial numbers up to 510 use an all-tube trigger circuit. Starting at serial number 511, the 581 uses tunnel diode triggering.

A Type 581A was introduced in 1963, and it is specified to have a bandwidth of 85 MHz instead of 100 MHz. The somewhat relaxed bandwidth specification improved CRT production yield which had been a problem when the scope was specified to 100 MHz.

Specifications

please add

Pictures

581

581A

Schematics