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Difference between revisions of "581"

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(rating detail per https://vintagetek.org/wp-content/uploads/2017/07/Tek-CRT-History-Keller-Feb-2007-Pt4.pdf)
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The Tektronix 581 is similar to the [[585]], but with simplified trigger and sweep circuitry.
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{{Oscilloscope Sidebar|
It was [[introduced in 1959]].
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title=Tektronix 581|
The vertical signal path of the 581 is the same as that of the 585.   
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image=581_old_1.JPG|
It uses the [[T581]] CRT.   
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caption=Tektronix 581 (early model) |
Type 581 scopes with serial numbers up to 510 use an all-tube trigger cicrcuit.
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introduced=1959 |
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discontinued=1972 |
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summary=100 MHz (85 MHz) oscilloscope|
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manuals=
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* [http://w140.com/tek_581_sn1273.pdf Tektronix 581 Manual (PDF)]
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* [http://w140.com/581a_by_matt.pdf Tektronix 581A Manual (PDF)]
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* [[Media:Service Scope 39 Aug 1966.pdf|580 series gain adjustment procedure, in Service Scope 39, Aug 1966]]
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}}
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The '''Tektronix 581''' is a 100 MHz tube scope [[introduced in 1959]] as a single time base version of the [[585]].
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Like all [[580-series_scopes|580-series scopes]], it uses [[580-series_plug-ins|580-series plug-ins]].
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The 58x series were the first Tektronix scopes to use [[distributed deflection plates]] and the last to use [[distributed amplifier]]s for vertical deflection.
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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]],
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they were the highest-speed general purpose scopes of Tek's tube scope era (the 1 GHz [[519]] was specialized with no vertical amplifier).
 +
 
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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 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 85MHz instead of 100MHz.
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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 100MHz.
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was specified to 100 MHz.
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==Specifications==
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[[Category:Specifications needed]] ''please add''
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==Pictures==
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===581===
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<gallery>
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581_old_1.JPG                  | early 581
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581_old_2.JPG                  | wrinkle and chrome from early 581
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581_triggermods.JPG            | TD trigger instead of 6DJ8 trigger
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581_selenium.JPG                | Selenium rectifier
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</gallery>
  
* [http://w140.com/tek_581_sn1273.pdf Tektronix 581 Manual (PDF)]
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===581A===
* [http://w140.com/581a_by_matt.pdf Tektronix 581A Manual (PDF)]
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<gallery>
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Tek 581 1.jpg                  | 581A
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Tek 581 2.jpg                  |
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Tek 581 3.jpg                  |
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Tek 581 5.jpg                  |
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</gallery>
  
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===Schematics===
 
<gallery>
 
<gallery>
Image:581_old_1.JPG|early 581
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Tek 581 early trig.png          | early model 581 trigger using tubes
Image:581_old_2.JPG|wrinkle and chrome from early 581.
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Tek 581 late trig.png          | late model 581 trigger using tunnel diode
Image:581_triggermods.JPG| TD trigger instead of 6DJ8 trigger.
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Tek 581 vertical output amp.png | 581 vertical output amp ([[distributed amplifier]]) driving CRT
Image:Tek 581 1.jpg
 
Image:Tek 581 2.jpg
 
Image:Tek 581 3.jpg
 
Image:Tek 581 5.jpg
 
 
</gallery>
 
</gallery>
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 +
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[[Category:580 series scopes]]

Revision as of 06:11, 13 December 2018

Tektronix 581
100 MHz (85 MHz) oscilloscope
Tektronix 581 (early model)

Produced from 1959 to 1972

Manuals
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