531: Difference between revisions

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It was [[introduced in 1954|introduced in March 1954]] simultaneously with the Type 535, and [[introduced in 1959|superseded in 1959]] by the Type 531A,

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), the reflected wave could be absorbed at the source end. This "single termination" approach made it possible to do away with the output chassis. All Tek scopes using a lumped-constant delay line went to this topology.

There is also a rack-mount version, Types RM31 and RM31A. They have a sliding chassis so that the scope can be serviced without removing it from a rack.   

The [[532]] is similar to the 531, but designed to be more reliable at the expense of slower risetime. The [[541]] is mostly the same as the 531, but has a [[distributed amplifier|distributed vertical amplifier]] and a different CRT.

File:531_early_1.jpg        | early 531

File:rm31a.jpg              | RM31A

File:Tek 531a on cart.JPG    | 531A on cart

File:Tek 531a 34 pr.jpg      | 531A

File:Tek 531a front.jpg      | 531A

File:Tek 531a right top.jpg  | 531A

File:Tek 531a right2.jpg    | 531A

File:Tek 531a right 3.jpg    | 531A

File:Tek 531a right.jpg      | 531A

File:Tek 531a left close.jpg | 531A

File:Tek 531a left.jpg      | 531A

File:Tek 531 brown 1.jpg | Brown-era 531 with [[CA|Type CA]]

File:Tek 531 brown 2.jpg | Brown-era 531 with [[CA|Type CA]]

File:Tek 531 brown 3.jpg | Brown-era 531 Rear

File:Tek 531a on cart.jpg|531A on cart