531: Difference between revisions

Latest revision as of 11:43, 1 July 2024

Tektronix 531
10 MHz oscilloscope Tektronix 531 Produced from 1954 to 1973 Manuals 531 Tektronix 531/541 Manual (OCR) 531 Factory Calibration Procedure (OCR) 531A Tektronix RM31A Manual 531A Factory Calibration Procedure (OCR) 531A Factory Calibration Procedure, February 1968 Tektronix 531A Modifications (All manuals in PDF format unless noted otherwise)

Manuals – Specifications – Links – Pictures

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.

The designer was Dick Rhiger.

The 531 and 535 were the first Tektronix scopes to accept plug-ins. It was introduced in March 1954 simultaneously with the Type 535, and superseded in 1959 by the Type 531A, which has more convenient controls and a slightly faster (15 MHz) vertical amplifier.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 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. 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 input chassis. All subsequent Tek scopes with a lumped-constant delay line used 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 vertical amplifier for 30 MHz bandwidth, and a different CRT.

Key Specifications

	— 531 SN 101-7600 —
Bandwidth	DC to 10 MHz (≤ 3 dB) with Type A plug-in
Rise time	0.035 μs
	— 531 SN 7601 up & 531A —
Bandwidth	DC to 15 MHz (≤ 3 dB) with Type K plug-in
Rise time	0.024 μs
	— all —
Line Voltage	108/115/122/216/244 V_AC ±10%,selected via primary voltage selector and voltage range selector switches, 50 Hz to 60 Hz.
Thermal Protection	Automatic resetting thermal cutout, in case internal temperature exceeds safe operating level
Power Consumption	475W with plug-in
Cooling	AC Fan
Trigger Modes	AC/DC/AC LF Reject, and HF Sync
Anode Potential	10 kV (relative to cathode)
Screen Area	6 cm × 10 cm
Construction	Aluminum alloy chassis. Anodized front panel
Weight	61,5 lbs / 27,8 kg

Links

Documents Referencing 531

Document	Class	Title	Authors	Year	Links
IBM 223-6725-2.pdf	Application Note	Tektronix oscilloscopes (IBM Customer Engineering Manual)		1960	310 • 310A • 531 • 531A • 535 • 535A • 545A • B • C • CA • D • G

Documents Referencing 531A

Document	Class	Title	Authors	Year	Links
IBM 223-6725-2.pdf	Application Note	Tektronix oscilloscopes (IBM Customer Engineering Manual)		1960	310 • 310A • 531 • 531A • 535 • 535A • 545A • B • C • CA • D • G

Pictures

531

early 531 with Type 53C
Brown-era 531 with Type CA
Brown-era 531 with Type CA
Brown-era 531 Rear

531A

531A on 202 cart
531A on 500/53cart
531A Overwiev
531A Front
531A Timebase ciruit
531A Power supply
531A Rectifier board
531A Inside left
531A Vertical amplifier
531A Inside right
manual compartment

RM31A

RM31A

Components

Some Parts Used in the 531

Part	Part Number(s)	Class	Description	Used in
120-037	120-037	Discrete component	power transformer	531 • 533
12AX7	154-043 • 154-0043-00	Vacuum Tube (Dual Triode)	dual triode	3C66 • 513 • 524 • 531 • 531A • 535 • 536 • 545 • 545A • 545B • 546 • 547 • 549 • 555 • 570 • 581 • 581A • 585 • 585A • E • Q • Hickok 1825 • Keithley 610
12BY7A	154-047 • 154-0047-00	Vacuum Tube (Pentode)	miniature 6.5 W power pentode	106 • 163 • 524 • 531 • 533 • 535 • 536 • 541 • 543 • 535 • 545 • 545A • 549 • 555 • 75 • 3A75 • 3B5
5651	154-052 • 154-0052-00 • 154-0288-00	Gas Discharge Tube (Voltage regulator)	87 V voltage reference	128 • 160 • 310 • 310A • 502 • 503 • 504 • 511A • 512 • 516 • 517 • 524 • 526 • 531 • 531A • 535 • 536 • 541 • 541A • 543 • 543A • 543B • 545 • 545A • 545B • 570 • 549 • 581 • 581A • 585 • 585A
5BG	154-0080-00 • 154-0081-00 • 154-0082-00 • 154-0083-00 • 154-0124-00	CRT	series of 5" CRTs	513 • 531 • 535
6197	154-0146-00	Vacuum Tube (Pentode)	7.5 W power pentode	516 • 531 • 533 • 535 • 535A • 547 • 556 • 75 • 3A75
6AU5	154-021 • 154-0021-00	Vacuum Tube (Pentode)	10 W beam power pentode	507 • 513 • 516 • 517 • 517A • 531 • 535 • 541 • 535 • 545 • 547 • 581 • 581A • 585 • 585A
6AU6	154-0022-00 • 157-0073-00 • 157-0059-00 • 154-0284-00	Vacuum Tube (Pentode)	RF pentode	107 • 160 • 181 • 190 • 60 • 2A60 • 72 • 3A72 • 3C66 • 310 • 310A • 316 • 317 • 360 • 502 • 502A • 506 • 511 • 511A • 512 • 513 • 516 • 517 • 517A • 524 • 526 • 529 • RM529 • 531 • 531A • 535 • 536 • 545 • 545A • 546 • 547 • 549 • 555 • 561 • 561A • 561S • 564 • 565 • 567 • 570 • 575 • 581 • 581A • 585 • 585A • 80 • C • CA • Q
6BQ7A	154-028 • 154-0028-00 • 157-0022-00 • 157-0003-00	Vacuum Tube (Dual Triode)	dual triode	107 • 163 • 181 • 310 • 315 • 316 • 360 • 524 • 531 • 532 • 535 • 536 • 541 • 545 • 570 • T
6CL6	154-031 • 154-0031-00 • 154-0286-00	Vacuum Tube (Pentode)	7.5 W power pentode	132 • 310 • 310A • 316 • 317 • 515 • 524 • 525 • 531 • 535 • 535A • 545 • 545A • 545B • 549 • 570 • 581 • 581A • 585 • 585A • 3A74
T51	154-0080-00 • 154-0081-00 • 154-0082-00 • 154-0083-00 • 154-0092-00 • 154-0096-00 • 154-0101-00 • 154-0117-00 • 154-0121-00 • 154-0123-00 • 154-0124-00 • 154-0117-00 • 154-0150-00 • 154-0197-00 • 154-0342-00 • 154-0379-00	CRT	5" CRT	513 • 531 • 535

Some Parts Used in the 531A

Part	Part Number(s)	Class	Description	Used in
12AX7	154-043 • 154-0043-00	Vacuum Tube (Dual Triode)	dual triode	3C66 • 513 • 524 • 531 • 531A • 535 • 536 • 545 • 545A • 545B • 546 • 547 • 549 • 555 • 570 • 581 • 581A • 585 • 585A • E • Q • Hickok 1825 • Keithley 610
5651	154-052 • 154-0052-00 • 154-0288-00	Gas Discharge Tube (Voltage regulator)	87 V voltage reference	128 • 160 • 310 • 310A • 502 • 503 • 504 • 511A • 512 • 516 • 517 • 524 • 526 • 531 • 531A • 535 • 536 • 541 • 541A • 543 • 543A • 543B • 545 • 545A • 545B • 570 • 549 • 581 • 581A • 585 • 585A
6AU6	154-0022-00 • 157-0073-00 • 157-0059-00 • 154-0284-00	Vacuum Tube (Pentode)	RF pentode	107 • 160 • 181 • 190 • 60 • 2A60 • 72 • 3A72 • 3C66 • 310 • 310A • 316 • 317 • 360 • 502 • 502A • 506 • 511 • 511A • 512 • 513 • 516 • 517 • 517A • 524 • 526 • 529 • RM529 • 531 • 531A • 535 • 536 • 545 • 545A • 546 • 547 • 549 • 555 • 561 • 561A • 561S • 564 • 565 • 567 • 570 • 575 • 581 • 581A • 585 • 585A • 80 • C • CA • Q
T5330	154-0178-00 • 154-0165-00 • 154-0179-00 • 154-0180-00 • 154-0350-00	CRT	5" CRT	RM31A • RM33 • RM33A • RM35A • 531A • 533 • 533A • 535A

Some Parts Used in the RM31A

Part	Part Number(s)	Class	Description	Used in
T5330	154-0178-00 • 154-0165-00 • 154-0179-00 • 154-0180-00 • 154-0350-00	CRT	5" CRT	RM31A • RM33 • RM33A • RM35A • 531A • 533 • 533A • 535A

@@ Line 1: / Line 1: @@
-{{Oscilloscope Sidebar |manufacturer=Tektronix |designers=Dick Rhiger |
+{{Oscilloscope Sidebar
-series=5000-series scopes |
+|manufacturer=Tektronix
-model= 531|
+|series=5000-series scopes
-summary=10 MHz scope |
+|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
-* [http://bama.edebris.com/download/tek/531_541/531_541.djvu Tektronix 531/541 Manual (DjVu)]
+|designers=Dick Rhiger
-* [https://w140.com/mmm/tek-531-541.pdf Tektronix 531/541 Manual (PDF)]
+|manuals=
-* [https://w140.com/tek_fcp/tek_type_531_factory_cal_proc.pdf Tektronix 531 Factory Calibration Procedure (PDF)]
+'''531'''
-* [https://w140.com/tek_fcp/tek_type_531a_factory_cal_proc.pdf Tektronix 531A Factory Calibration Procedure (PDF)]
+* [[Media:070-203.pdf|Tektronix 531/541 Manual]] (OCR)
-* [[Media:070-301.pdf|Tektronix RM31A Manual (PDF)]]
+* [[Media:tek_531_fcp.pdf|531 Factory Calibration Procedure]] (OCR)
-* [[Media:tek_531_fcp.pdf|Tektronix 531 Factory Calibration Procedure (PDF, OCR)]]
-* [[Media:tek_531a_fcp.pdf|Tektronix 531A Factory Calibration Procedure (PDF, OCR)]]
+'''531A'''
-* [[Media:Tek 531a fcp feb 1968.pdf|Tektronix 531A Factory Calibration Procedure, February 1968 (PDF)]]
+* [[Media:070-301.pdf|Tektronix RM31A Manual]]
+* [[Media:tek_531a_fcp.pdf|531A Factory Calibration Procedure]] (OCR)
+* [[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]].
 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.
@@ Line 25: / Line 30: @@
 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 before the vertical amplifier.
+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.
 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.
+This "single termination" approach made it possible to do away with the input chassis.
-All Tek scopes using a lumped-constant delay line went to this topology.
+All subsequent Tek scopes with a lumped-constant delay line used this topology.
 There is also a rack-mount version, Types RM31 and RM31A.
@@ Line 57: / Line 62: @@
 {{Spec | Weight| 61,5 lbs / 27,8 kg }}
 {{EndSpecs}}
+==Links==
+{{Documents|Link=531}}
+{{Documents|Link=531A}}
 ==Pictures==
@@ Line 62: / Line 71: @@
 <gallery>
 _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>
@@ Line 89: / Line 98: @@
 </gallery>
+==Components==
 {{Parts|531}}
 {{Parts|531A}}