Difference between revisions of "581"

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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 amplifiers]] for vertical deflection.
  
 
==Specifications==
 
==Specifications==
Line 29: Line 31:
 
==Pictures==
 
==Pictures==
 
<gallery>
 
<gallery>
Image:581_old_1.JPG|early 581
+
File:581_old_1.JPG | early 581
Image:581_old_2.JPG|wrinkle and chrome from early 581.
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File:581_old_2.JPG | wrinkle and chrome from early 581.
Image:581_triggermods.JPG| TD trigger instead of 6DJ8 trigger.
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File:581_triggermods.JPG | TD trigger instead of 6DJ8 trigger.
Image:Tek 581 1.jpg
+
File:Tek 581 1.jpg
Image:Tek 581 2.jpg
+
File:Tek 581 2.jpg
Image:Tek 581 3.jpg
+
File:Tek 581 3.jpg
Image:Tek 581 5.jpg
+
File:Tek 581 5.jpg
File:Tek 581 early trig.png|early model 581 trigger using tubes
+
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 late trig.png |late model 581 trigger using tunnel diode
File:Tek 581 vertical output amp.png|581 vertical output amp driving CRT
+
File:Tek 581 vertical output amp.png | 581 vertical output amp ([[distributed amplifier]]) driving CRT
 
</gallery>
 
</gallery>
  
  
 
[[Category:580 series scopes]]
 
[[Category:580 series scopes]]

Revision as of 02:51, 13 May 2015

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

Produced from 1959 to (?)

Manuals
Manuals – Specifications – Links – Pictures

The Tektronix 581 is a 100 MHz tube scope similar to the 585, but with simplified trigger and sweep circuitry. Like all 580-series scopes, it uses 580-series plug-ins. It was introduced in 1959.

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 later, 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.

The 580 series were the last Tektronix scopes to use distributed amplifiers for vertical deflection.

Specifications

please add

Pictures