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{{Oscilloscope Sidebar |manufacturer=Tektronix | | {{Oscilloscope Sidebar | ||
series= | |manufacturer=Tektronix | ||
model= 531| | |series=500-series scopes | ||
summary=10 MHz | |model=531 | ||
image=Tek 531a g front.jpg | | |summary=10 MHz oscilloscope | ||
caption=Tektronix 531 | | |image=Tek 531a g front.jpg | ||
introduced=1954 | | |caption=Tektronix 531 | ||
discontinued=1973 | | |introduced=1954 | ||
manuals= | |discontinued=1973 | ||
|designers=Dick Rhiger | |||
* [ | |manuals= | ||
* [ | '''531''' | ||
* [[Media:070-203.pdf|Tektronix 531/541 Manual]] | |||
* [[Media:070-301.pdf|Tektronix RM31A Manual | * [[Media:tek_531_fcp.pdf|531 Factory Calibration Procedure]] | ||
* [[Media: | |||
* [[Media: | '''531A''' | ||
* [[Media:Tek 531a | * [[Media:070-301.pdf|Tektronix RM31A Manual]] | ||
* [[Media:tek_531a_fcp.pdf|531A Factory Calibration Procedure]] | |||
* [[Media:Tek 531a fcp feb 1968.pdf|531A Factory Calibration Procedure, February 1968]] | |||
* [[Media:Tek 531a mods.pdf|Tektronix 531A Modifications]] | |||
}} | }} | ||
The '''Tektronix Type 531''' is a 10 MHz oscilloscope that accepts [[letter-series and 1-series plug-ins]]. | The '''Tektronix Type 531''' is a 10 MHz oscilloscope that accepts [[letter-series and 1-series plug-ins]]. | ||
It is exactly like Type [[535]] except it does not have the Delayed Sweep (dual timebase) feature. | It is exactly like Type [[535]] except it does not have the Delayed Sweep (dual timebase) feature. | ||
The designer was [[Dick Rhiger]]. | |||
The 531 and 535 were the first Tektronix scopes to accept plug-ins. | The 531 and 535 were the first Tektronix scopes to accept plug-ins. | ||
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which has more convenient controls and a slightly faster (15 MHz) vertical amplifier. | which has more convenient controls and a slightly faster (15 MHz) vertical amplifier. | ||
In serial numbers 101 to 7600, the 531's L-C [[delay line]] is | In serial numbers 101 to 7600, the 531's L-C [[delay line]] is in the middle of the vertical amplifier. | ||
In serial numbers 7601 and up, the 531's delay line is between the vertical amplifier and the CRT. | In serial numbers 7601 and up, the 531's delay line is between the vertical amplifier and the CRT. | ||
This change was the result of [[John Kobbe]]'s insight that if the far end of the delay line was an open circuit (which the CRT approximates), | This change was the result of [[John Kobbe]]'s insight that if the far end of the delay line was an open circuit (which the CRT approximates), | ||
the reflected wave could be absorbed at the source end. | the reflected wave could be absorbed at the source end. | ||
This "single termination" approach made it possible to do away with the | This "single termination" approach made it possible to do away with the input chassis. | ||
All Tek scopes | All subsequent Tek scopes with a lumped-constant delay line used this topology. | ||
There is also a rack-mount version, Types RM31 and RM31A. | There is also a rack-mount version, Types RM31 and RM31A. | ||
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{{Spec | Weight| 61,5 lbs / 27,8 kg }} | {{Spec | Weight| 61,5 lbs / 27,8 kg }} | ||
{{EndSpecs}} | {{EndSpecs}} | ||
==Links== | |||
{{Documents|Link=531}} | |||
{{Documents|Link=531A}} | |||
==Pictures== | ==Pictures== | ||
===531=== | |||
<gallery> | <gallery> | ||
531_early_1.jpg | early 531 with [[C|Type 53C]] | 531_early_1.jpg | early 531 with [[C|Type 53C]] | ||
Tek 531 brown 1.jpg | Brown-era 531 with [[CA|Type CA]] | Tek 531 brown 1.jpg | Brown-era 531 with [[CA|Type CA]] | ||
Tek 531 brown 2.jpg | Brown-era 531 with [[CA|Type CA]] | Tek 531 brown 2.jpg | Brown-era 531 with [[CA|Type CA]] | ||
Tek 531 brown 3.jpg | Brown-era 531 Rear | Tek 531 brown 3.jpg | Brown-era 531 Rear | ||
</gallery> | </gallery> | ||
===531A=== | |||
<gallery> | <gallery> | ||
Tek 531a g front.jpg | Tek 531a g front.jpg | ||
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</gallery> | </gallery> | ||
===RM31A=== | |||
<gallery> | <gallery> | ||
rm31a.jpg | RM31A | rm31a.jpg | RM31A | ||
</gallery> | </gallery> | ||
==Components== | |||
{{Parts|531}} | {{Parts|531}} | ||
{{Parts|531A}} | {{Parts|531A}} | ||