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manuals=
manuals=
* [http://w140.com/mmm/tek-545.pdf Tektronix 545 Manual (PDF)]
* [http://w140.com/mmm/tek-545.pdf Tektronix 545 Manual (PDF)]
* [http://bama.edebris.com/download/tek/545a(2)/Tek%20545a(2).pdf Tektronix 545A Manual (PDF)]
* [[Media:070-163.pdf|545A Instruction]] (OCR PDF, 20M)
* [http://bama.edebris.com/download/tek/545b/545b.djvu Tektronix 545B Manual (PDF)]
* [http://bama.edebris.com/download/tek/545b/545b.djvu Tektronix 545B Manual (PDF)]
* [http://w140.com/tek_545_calibration_and_maintenance_procedure.pdf Tektronix 545 Calibration and Maintenance Procedure (PDF)]
* [http://w140.com/535_545_operators_handbook.pdf Tektronix 535 and 545 Operators Handbook (PDF, OCR)]
* [http://w140.com/535_545_operators_handbook.pdf Tektronix 535 and 545 Operators Handbook (PDF)]
'''Maintenance and calibration'''
* [http://w140.com/tek_balancing_545_vert.pdf Balancing the 540-Series Vertical Amplifier (PDF)]
* [http://w140.com/tek_balancing_545_vert.pdf Balancing the 540-Series Vertical Amplifier (PDF, OCR)]
* [http://w140.com/tek_fcp/tek_545_fac_cal.pdf 545 Factory Calibration Procedure (PDF)]
* [http://w140.com/tek_545a_factory_calibration_procedure_early.pdf 545A Factory Calibration Procedure (January 1961, PDF)]
* [http://w140.com/tek_fcp/tek_545a_fac_cal.pdf 545A Factory Calibration Procedure (July 1961, PDF)]
* [http://w140.com/tek_fcp/tek_adjust_540_vert_delay.pdf How to Adjust the Vertical Amplifier and Delay Line of a 540-Series Oscilloscope (PDF)]
* [http://w140.com/tek_fcp/tek_adjust_540_vert_delay.pdf How to Adjust the Vertical Amplifier and Delay Line of a 540-Series Oscilloscope (PDF)]
* [http://w140.com/navair_17-20aw-08.pdf Navair 17-20AW-08 Manual, which discusses the 545 (PDF)]
* [http://w140.com/navair_17-20aw-08.pdf Navair 17-20AW-08 Manual, which discusses the 545 (PDF)]
* [[Media:Tek 545b irb.pdf|Tektronix 545B Instrument Reference Book (OCR, PDF)]]
* [[Media:tek_545_fcp.pdf|545 Factory Calibration Procedure, September 1959 (PDF, OCR)]]
* [[Media:tek_545a_fcp_early.pdf|545A Factory Calibration Procedure (January 1961, PDF, OCR)]]
* [[Media:tek_545a_fcp.pdf|545A Factory Calibration Procedure (July 1961, PDF, OCR)]]
* [http://w140.com/tek_545_calibration_and_maintenance_procedure.pdf Tektronix 545 Calibration and Maintenance Procedure (PDF)]
* [[Media:tek_545_calibration_maintenance_proc.pdf|Tektronix 545 Calibration and Maintenance Procedure (PDF, OCR, bad-OCR)]]
* [[Media:Tek 545b fcp jan 1966.pdf|Tektronix 545B Factory Calibration Procedure, January 1966 (PDF, needs PDF)]]
* [[Media:Tek 545b fcp tlc up to jan 1969.pdf|Tektronix 545B Factory Calibration Procedure, January 1969 (PDF, needs PDF)]]
* [[Media:Tek 545b eis march 1964.pdf|Tektronix 545B Engineering Instrument Specification (PDF)]]
<!-- * [http://bama.edebris.com/download/tek/545a(2)/Tek%20545a(2).pdf Tektronix 545A Manual (PDF)] -->
<!-- * [http://w140.com/tek_fcp/tek_545a_fac_cal.pdf 545A Factory Calibration Procedure (July 1961, PDF)] -->
<!-- * [http://w140.com/tek_fcp/tek_545_fac_cal.pdf 545 Factory Calibration Procedure (PDF)] -->
<!-- * [http://w140.com/tek_545a_factory_calibration_procedure_early.pdf 545A Factory Calibration Procedure (January 1961, PDF)] -->
}}
}}
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]].   
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Type 545 was [[introduced in 1955|introduced February 7th, 1955]] along with the Type [[541]], and superseded in 1959 by the Type 545A, which was in turn superseded in 1964 by the Type 545B, which was produced until 1973.  
Type 545 was [[introduced in 1955|introduced February 7th, 1955]] along with the Type [[541]], and superseded in 1959 by the Type 545A, which was in turn superseded in 1964 by the Type 545B, which was produced until 1973.  
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 545A uses the [[T5430]] CRT. P2 [[phosphor]] was standard.
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 545A uses the [[T5430]] CRT for which also P2 phosphor was standard.
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 ==
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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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=== 545B Vertical Path ===
=== 545B Vertical Path ===
The Type 545B differs significantly from the 545 and 545A.   
The Type 545B differs significantly from the 545 and 545A.
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 flat glass faceplate that has internal graticule markings, eliminating parallax errors.
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 that has internal graticule markings, eliminating parallax errors.


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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
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Tek 545a handbook compartment1.jpg|545A handbook compartment
Tek 545a handbook compartment1.jpg|545A handbook compartment
Tek 545a handbook compartment2.jpg|545A handbook compartment
Tek 545a handbook compartment2.jpg|545A handbook compartment
Tek 545a on 202-1.jpg|545A on a Tek 202-1 cart
Tek 545a controls.jpg|545A controls
Tek 545a trace.jpg|545A trace
Tek 545a trace2.jpg|545A trace
</gallery>
</gallery>


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Tek rm45a 404.jpg|RM 45A with standard B timebase
Tek rm45a 404.jpg|RM 45A with standard B timebase
Tek rm45a on pallet.jpg|RM 45A with raster B timebase, MOD 116B
Tek rm45a on pallet.jpg|RM 45A with raster B timebase, MOD 116B
tek_rm45a_goddard.jpg|RM45A from NASA
</gallery>
</gallery>


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<gallery>
<gallery>
Tek 545b front.jpg          | 545B front
Tek 545b front.jpg          | 545B front
545B guernsey.JPG            | a british made 545B (Tektronix Guernsey LTD. )
Tek 545b trace.jpg          | 545B with [[M|Type M plug-in]]
Tek 545b trace.jpg          | 545B with [[M|Type M plug-in]]
Tek 545b right.jpg            | 545B right side
Tek 545b right.jpg            | 545B right side

Revision as of 19:10, 31 January 2021

Manuals – Specifications – Links – Pictures

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.

Type 545 was introduced February 7th, 1955 along with the Type 541, and superseded in 1959 by the Type 545A, which was in turn superseded in 1964 by the Type 545B, which was produced until 1973.

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 / 5BHP2 CRT, P2 phosphor was standard. The 545A uses the T5430 CRT for which also P2 phosphor was standard. 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

There were also rack-mount versions. Types RM41 and RM45 were introduced in October 1957, Types RM41A and RM45A were 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.

Relationship of 545B to 547

Some feel that Type 547 replaced Type 545, but this is not quite true; Types 545B and 546/547 were introduced simultaneously. It is more correct to say that the 50 MHz 546 and 547 were upgrades. (The Type 544 is likewise the upgrade for the 541.)

The Type 53K/54K plug-in was introduced with the 545 and 541, and until Type 53/54L came out in 1957, it was the only plug-in that could take full advantage of their bandwidth. There was never a full-speed dual-trace plug-in — that would wait until Types 1A1 and 1A2, which came out with the 545B.

Key Specifications

Bandwidth 30 MHz (33 MHz with a 50 MHz plug-in such as Type 1A1)
     — 545B
Sweep 0.1 μs/div to 5 s/div, 1−2−5
CRT T5470-31-2, 10 kV acceleration
Probes 2 P6006 probes with BNC connectors

please add

Internals

Early 545 units have selenium rectifiers. Later units have silicon rectifiers.

The trigger circuit used a 6DJ8 tube in the 545 and 545A. NPN transistors are used in the 545B trigger circuit.

545 and 545A Vertical Path

Types 545 and 545A have a six stage differential distributed vertical amplifier made of twelve 6DK6 tubes. 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 vertical scale is only 4 divisions, 2 above and 2 below the graticule center line. The lower bandwidth 531 and 535 retained the 6 vertical divisions, as used in most other Tektronix scopes. In the 545, the distributed vertical amplifier's plate supply was not separately fused. Shorting the outputs of the vertical amplifier to ground can cause major damage. In the 545A, there is a 150 mA fuse, F1054, preventing such damage.

545B Vertical Path

The Type 545B differs significantly from the 545 and 545A. 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 flat glass faceplate that has internal graticule markings, eliminating parallax errors.

Links

Pictures

545

545A

RM45A

545B

RM545B