535: Difference between revisions

{{Oscilloscope Sidebar

|series=500-series scopes

|model=535  

|summary=10 (15) MHz dual-timebase scope  

|image=Tek-535a-crop.jpg  

|caption=Tektronix 535A front  

|introduced=1954  

|discontinued=1973  

|designers=Dick Rhiger

|manuals=

* [[Media:070-198.pdf    | Tektronix 535 Manual]]

* [[Media:tek_type_535_545_operators_handbook.pdf|Tektronix 535 and 545 Operators Handbook]] (OCR)

* [[Media:tek_type_535_modification_summary.pdf|Tektronix 535 Modification Summary]] (bad-OCR)

* [[Media:navair_17-20aw-08_manual.pdf|Navair 17-20AW-08 Manual, which discusses the 535]] (OCR)

* [[Media:070-0145-01.pdf | Tektronix 535A Manual]] (OCR)

* [[Media:Using your 535A or 545A.pdf|Using your 535A or 545A (1960)]]

* [[Media:Operators Handbook 535A 545A 1959.pdf|Tektronix 535A and 545A Operator's Handbook 1959]]

* [[Media:tek_type_535_fcp_low-sn.pdf|Tektronix 535 Factory Calibration Guide low-sn]] (OCR)

* [[Media:tek_type_535_fcp_high-sn.pdf|Tektronix 535 Factory Calibration Guide high-sn]] (OCR)

* [[Media:tek_type_535a_fcp.pdf|Tektronix 535A Factory Calibration Guide, August 1959]] (OCR)

* [[Media:Tek 535a fcp march 1968.pdf|Tektronix 535A Factory Calibration Procedure, March 1968]] (OCR)

</small>

The 535 is functionally the same as the 30-MHz [[545]], but with a simpler, non-distributed vertical amplifier.

Early 535s came in brown, square-cornered cabinets; in 1956 the cabinet became blue and round-cornered.

Type 535, the single-timebase Type [[531]], and the first four plug-ins, Types 53[[A]], 53[[B]], 53[[C]], and 53[[D]],

were [[introduced in 1954|introduced in August 1954]], advertised as ''"... the «convertibles» of the Tektronix line"''.

Types [[541]] and [[545]] [[introduced_in_1955|came out in March 1955]].

In 1959, Types [[531]], 535, [[541]], and [[545]] were superseded by Types 531A, 535A, 541A, and 545A, which have more convenient controls. 

In addition, Types 531A and 535A have slightly faster (15 MHz vs. 11 MHz) vertical amplifiers.

 

There is also a rack-mount version, Types RM35 and RM35A.

 

Starting in 1963, the 535A was made with [[BNC connector]]s for the external trigger inputs.   

Prior to 1963, the external trigger inputs used [[UHF connector]]s.

 

<nowiki>*</nowiki> With Type [[A]] or [[B]] plug-in; 11 MHz with Type [[K]] or other fast plug-in.

{{SpecGroup | 535 SN 101-8627: Double-terminated delay line}}

{{Spec | CRT | early models, [[5BG]]P2, part number [[154-081]]; late models, [[T51]]; 10 kV acceleration, 6 cm × 10 cm screen}}

{{Spec | Weight| 65 lbs / 29.5 kg }}

{{Documents|Link=535}}

{{Documents|Link=535A}}

Three "special models" of 535 were made:

* 535-S1 (sweep delay 10 microseconds to 1 second)

* 535-S2 (sweep delay 100 microseconds to 10 seconds)

* 535-S6 (sweep delay 1.5 microseconds to 10 seconds)

The delaying timebase on the standard non-A 535 supports delays up to 100 milliseconds.

The 535-S1 supports delays up to 1 second, the 535A up to 10 seconds.  

From [[Media:Service_Scope_01_Oct_1959.pdf|ServiceScope No.1, October 1959]]:

If a total delaying sweep time in excess of 10 ms/cm is required, a K535-S1 modification kit (Tek #040-063) which gives a maximum delay sweep range of 1 s/cm.  

This kit is available for $40.00 in including a new front panel.

Triggering is done with a Schmitt trigger made of a [[6U8]] tube (in early instruments) or a [[6DJ8]] tube (in late instruments).

 

Early 535s had [[selenium rectifiers]].  The 535 has a [[thermal cutoff]].

 

The Power supply section is very similar to a [[549]]. It is an all tube design using

: [[12AX7]] as comparator

: [[6AU6]] as error amplifier for all rails

* [https://richardsears.wordpress.com/2011/06/18/tektronix-and-early-hewlett-packard/ Comparison of Tektronix 535, 535A, and HP 150A] with detailed pictures

<!-- dead link 2023-03-27 * [http://www.lydecker.org/Tektronix_535A.htm Tektronix 535A - Restoring a Swap Meet Find] -->

535A.jpg|535A

535_vertical2.png|vertical amplifier

Wellenkino 535a 3.jpg

Wellenkino 535a 2.jpg