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{{ | {{Instrument Sidebar | ||
|manufacturer=Tektronix | |||
image=Tek_545a_291_1.jpg | | |model=545 | ||
caption=Tektronix 545A front view | | |class=Oscilloscope | ||
introduced=1955 | | |series=500-series scopes | ||
discontinued=1974 | | |image=Tek_545a_291_1.jpg | ||
summary=30 (33) MHz oscilloscope | | |caption=Tektronix 545A front view | ||
manuals= | |introduced=1955 | ||
* [ | |discontinued=1974 | ||
|summary=30 (33) MHz oscilloscope | |||
* [ | |designers=John Gates;Dave Barton;Bob Shand | ||
|manuals= | |||
* [ | '''545''' | ||
* [ | * [[Media:070-198.pdf|Tektronix 545 Manual]] | ||
* [ | * [[Media:535_545_operators_handbook.pdf|Tektronix 535 and 545 Operators Handbook]] (OCR) | ||
* [[Media:Tek | * [[Media:tek_545_fcp.pdf|545 Factory Calibration Procedure, September 1959]] (OCR) | ||
* [[Media:Tek_545_calibration_and_maintenance_procedure.pdf|Tektronix 545 Calibration and Maintenance Procedure]] | |||
* [[Media:tek_545_calibration_maintenance_proc.pdf|Tektronix 545 Calibration and Maintenance Procedure]] (bad-OCR) | |||
* [[Media:Tek 545 mod 112.pdf|Tektronix 545 Mod 112]] | |||
'''545A''' | |||
* [[Media:070-163.pdf|545A Instruction]] (OCR) | |||
< | * [[Media:tek_545a_fcp_early.pdf|545A Factory Calibration Procedure, January 1961]] (OCR) | ||
* [[Media: | * [[Media:tek_545a_fcp.pdf|545A Factory Calibration Procedure, July 1961]] (OCR) | ||
* [[Media: | |||
* [[Media: | '''545B''' | ||
* [ | * [[Media:070-428.pdf|Tektronix 545B Manual 070-428]]<br /><small>Alternate: [https://bama.edebris.com/download/tek/545b/545b.djvu DJVu @ BAMA]</small> | ||
* [ | * ''[[Media:070-438.pdf|RM543B manual 070-438 needed]]'' | ||
* [[Media:Tek 545b irb.pdf|Tektronix 545B Instrument Reference Book]] (OCR) | |||
* [[Media:Tek 545b fcp jan 1966.pdf|Tektronix 545B Factory Calibration Procedure, January 1966]] (needs OCR) | |||
* [[Media:Tek 545b fcp tlc up to jan 1969.pdf|Tektronix 545B Factory Calibration Procedure, January 1969]] (needs OCR) | |||
* [[Media:Tek 545b eis march 1964.pdf|Tektronix 545B Engineering Instrument Specification]] | |||
'''Maintenance and calibration''' | |||
* [https://w140.com/tek_balancing_545_vert.pdf Balancing the 540-Series Vertical Amplifier] (OCR) | |||
* [https://w140.com/tek_fcp/tek_adjust_540_vert_delay.pdf How to Adjust the Vertical Amplifier and Delay Line of a 540-Series Oscilloscope] | |||
* [https://w140.com/navair_17-20aw-08.pdf Navair 17-20AW-08 Manual, which discusses the 545] | |||
}} | }} | ||
The '''Tektronix Type 545''' is a 30 (33) MHz scope that takes [[letter-series and 1-series plug-ins]]. | The '''Tektronix Type 545''' is a 30 (33) MHz scope that takes [[letter-series and 1-series plug-ins]]. It has two timebases, which allows delayed triggering. | ||
It has two timebases, which allows delayed triggering. | |||
Type 545 was [[introduced in 1955|introduced February 7th, 1955]] along with Type [[541]], and superseded in 1959 by Type 545A, | |||
which was in turn superseded in 1964 by Type 545B, which was produced until 1973. Type [[543]], which is a 541 with 100x sweep magnifier, was [[introduced in 1958]]. | |||
The difference between the 545A and 545 is the control ergonomics, not any major circuit design changes. | |||
The difference between the 545A and 545 is the control ergonomics, not any major circuit design changes. | The main improvement was to replace a pair of switches for the time base (8-position Time/Div and 6-position multiplier) | ||
with a single 24-position switch, freeing up front panel space for a Time Base B Trigger Mode rotary switch. | |||
Additionally, the delaying timebase on the 545A supports delays up to 10 seconds while the 545 supports delays only up to 100 milliseconds. | |||
The older 545 uses the [[T54|T54 / 5BHP2]] CRT, P2 [[phosphor]] was standard. | The older 545 uses the [[T54|T54 / 5BHP2]] CRT, P2 [[phosphor]] was standard. | ||
The 545A uses the [[T5430]] CRT for which also P2 phosphor was standard. | The 545A uses the [[T5430]] CRT for which also P2 phosphor was standard. | ||
The newer | The newer 545B came with the further improved [[T5470]] CRT (also used in the [[543B]], [[544]], [[546]] and [[547]]) and P31 phosphor as standard. | ||
== Versions == | == Versions == | ||
There were also rack-mount versions. Types RM41 and RM45 were [[introduced in 1957|introduced in October 1957]], | There were also rack-mount versions. Types RM41 and RM45 were [[introduced in 1957|introduced in October 1957]], | ||
Types RM41A and RM45A were [[introduced in 1959|introduced in May 1959]] simultaneously with their bench counterparts, and the rackmount Type RM545B or R545B was introduced at the same time as Type 545B. | Types RM41A and RM45A were [[introduced in 1959|introduced in May 1959]] simultaneously with their bench counterparts, | ||
and the rackmount Type RM545B or R545B was introduced at the same time as Type 545B. | |||
Clones of the 545A are the [[Lavoie LA-265A]] and [[Hickok 1805A]]. These clones were not licensed by Tektronix. | Clones of the 545A are the [[Lavoie LA-265A]] and [[Hickok 1805A]]. These clones were not licensed by Tektronix. | ||
=== Relationship of 545B to 547 === | === Relationship of 545B to 547 === | ||
Some feel that [[547|Type 547]] replaced Type 545, but this is not quite true; Types 545B and [[546]]/[[547]] were introduced simultaneously. | Some feel that [[547|Type 547]] replaced Type 545, but this is not quite true; Types 545B and [[546]]/[[547]] were introduced simultaneously ([[introduced in 1964|1964]]). | ||
It is more correct to say that the 50 MHz 546 and 547 were upgrades. ( | It is more correct to say that the 50 MHz 546 and 547 were upgrades. (Type 544 is likewise the upgrade for 541/543.) | ||
The Type [[K|53K/54K]] plug-in was introduced with the 545 and 541, and until Type [[L|53/54L]] came out in 1957, | The Type [[K|53K/54K]] plug-in was introduced with the 545 and 541, and until Type [[L|53/54L]] came out in 1957, | ||
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{{BeginSpecs}} | {{BeginSpecs}} | ||
{{Spec | Bandwidth | 30 MHz (33 MHz with a 50 MHz plug-in such as Type [[1A1]]) }} | {{Spec | Bandwidth | 30 MHz (33 MHz with a 50 MHz plug-in such as Type [[1A1]]) }} | ||
{{SpecGroup|545B}} | |||
{{Spec | Sweep | 0.1 μs/div to 5 s/div, 1−2−5 }} | |||
{{Spec | CRT | [[T5470]]-31-2, 10 kV acceleration }} | |||
{{Spec | Probes | 2 P6006 probes with BNC connectors }} | |||
{{EndSpecs}} | {{EndSpecs}} | ||
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=== 545 and 545A Vertical Path === | === 545 and 545A Vertical Path === | ||
Types 545 and 545A have a six stage differential [[distributed amplifier|distributed vertical amplifier]] | Types 545 and 545A have a six stage differential [[distributed amplifier|distributed vertical amplifier]] made of twelve [[6DK6]] tubes. | ||
made of twelve [[6DK6]] tubes. | |||
The vertical amplifier used in the 545A is also used in the [[551]] and [[555]]. | The vertical amplifier used in the 545A is also used in the [[551]] and [[555]]. | ||
The 545 uses the [[154-098]] CRT. With the limited CRT technology available at the time, the higher bandwidth of the 541 and 545 came with a tradeoff. | The 545 uses the [[154-098]] CRT. With the limited CRT technology available at the time, the higher bandwidth of the 541 and 545 came with a tradeoff. | ||
The vertical scale is only 4 divisions, 2 above and 2 below the graticule center line. The lower bandwidth 531 | The vertical scale is only 4 divisions, 2 above and 2 below the graticule center line. | ||
The lower bandwidth 531/[[Type 533|533]]/535 retained the 6 vertical divisions, as used in most other Tektronix scopes. | |||
Shorting the outputs of the vertical amplifier to ground can cause | Shorting the outputs of the vertical amplifier to ground can cause expensive damage by burning out the termination resistor network. | ||
Starting at Type 545A serial number 29960, there is a 150 mA fuse, F1054, to prevent that failure. | |||
This change was made available for instruments already built, in Modification Kit 040-227. | |||
=== 545B Vertical Path === | === 545B Vertical Path === | ||
Type 545B differs significantly from the 545 and 545A. | |||
It has a partly solid-state, non-distributed vertical amp, and uses the [[154-0478-00]] CRT which is also used in the [[544]], [[546]], and [[547]]. Improvements in CRT design, including reduced deflection plate capacitance and increased sensitivity increased the vertical scale in the 545B from 4 to 6 divisions. The improved CRT also uses a ceramic envelope, with flat glass faceplate | It was designed by [[Dave Barton]]. | ||
It has a partly solid-state, non-distributed vertical amp, and uses the [[154-0478-00]] CRT which is also used in the [[544]], [[546]], and [[547]]. Improvements in CRT design, including reduced deflection plate capacitance and increased sensitivity, increased the vertical scale in the 545B from 4 to 6 divisions. The improved CRT also uses a ceramic envelope, with a flat glass faceplate with internal graticule markings to eliminate parallax errors. | |||
==Links== | ==Links== | ||
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Tek 545 early 5.jpg|545, early style | Tek 545 early 5.jpg|545, early style | ||
Tek 545 early 6.jpg|545, early style | Tek 545 early 6.jpg|545, early style | ||
Tek 545 distributed amplifier on.jpg|Distributed amplifier | |||
Tek 545 vertical rackmount.jpg|545 in vertical rackmount form | |||
</gallery> | </gallery> | ||
===545A=== | ===545A=== | ||
<gallery> | <gallery> | ||
Tek-545A-front.jpg | |||
Tek 545a 291 1.jpg | 545A front | Tek 545a 291 1.jpg | 545A front | ||
Tek 545a 291 2.jpg | Tek 545a 291 2.jpg | ||
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Tek 545a 291 4.jpg | Tek 545a 291 4.jpg | ||
Tek 545a 291 5.jpg | Tek 545a 291 5.jpg | ||
Tek 545a 291 6.jpg | Tek 545a 291 6.jpg | 545A interior, right side | ||
Tek 545a 291 7.jpg | Tek 545a 291 7.jpg | 545A interior, left side | ||
Tek-545a-right1.jpg | 545A interior, right side detail (time base B chassis open) | |||
Tek-545a-timebase-a.jpg | 545A interior, right side detail (time base A) | |||
Tek-545a-timebase-b.jpg | 545A interior, right side detail (time base B) | |||
Tek-545a-hv-1.jpg | 545A interior, HV supply | |||
Tek-545a-hv-2.jpg | 545A interior, HV supply | |||
Tek-545a-hv-osc.jpg | 545A interior, HV oscillator tube | |||
Tek-545a-rectifier.jpg | 545A interior, rectifier | |||
Tek-545a-bottom1.jpg | 545A interior, bottom view | |||
Tek-545a-bottom2.jpg | 545A interior, bottom view (DC voltage regulator section detail) | |||
Tek-545a-bottom3.jpg | 545A interior, bottom view (distributed amplifier section detail) | |||
Tek 545a delay line.jpg | 545A Delay line | Tek 545a delay line.jpg | 545A Delay line | ||
Tek_545a_blockdiagram.png | 545A block diagram | Tek_545a_blockdiagram.png | 545A block diagram | ||
Line 180: | Line 207: | ||
</gallery> | </gallery> | ||
{{Parts|545}} | |||
{{Parts|RM45}} | |||
{{Parts|545A}} | |||
{{Parts|545B}} | |||
{{Parts|RM545B}} | |||
[[Category:500 series scopes]] | [[Category:500 series scopes]] | ||
[[Category:Introduced in 1955]] | [[Category:Introduced in 1955]] |