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The Tektronix Type 545 is a 30MHz* scope that takes | {{Oscilloscope Sidebar| | ||
[[letter-series and 1-series plug-ins]]. | title=Tektronix 545| | ||
image=Tek 545b front.jpg| | |||
caption=Tektronix 545B, front view| | |||
years=1955 — ?| | |||
summary=30 MHz oscilloscope| | |||
manuals= | |||
* [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)] | |||
* [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)] | |||
* [http://w140.com/tek_balancing_545_vert.pdf Balancing the 540-Series Vertical Amplifier (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)] | |||
* [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)] | |||
}} | |||
The Tektronix Type 545 is a 30MHz* 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7th, 1955]] | Type 545 was [[introduced in 1955|introduced February 7th, 1955]] along with the Type [[541]], and superseded in 1959 by the Type 545A, which was in turn superseded in 1964 by the Type 545B. | ||
along with the Type [[541]], and superseded in 1959 by the Type 545A, | The difference between the 545A and 545 is the control ergonomics, not any major circuit design changes. | ||
which was in turn superseded in 1964 by the Type 545B. | |||
The difference between the 545A and 545 is the control ergonomics, | |||
not any major circuit design changes. | |||
== 545 and 545A Vertical Path == | == 545 and 545A Vertical Path == | ||
Types 545 and 545A have a | Types 545 and 545A have a six stage differential [[distributed amplifier|distributed vertical amplifier]] | ||
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]]. | ||
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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 has a partly solid-state, non-distributed vertical amp, | 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. | ||
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. | |||
== Trigger == | == Trigger == | ||
The trigger circuit used a [[6DJ8]] tube in the 545 and 545A. | The trigger circuit used a [[6DJ8]] tube in the 545 and 545A. NPN transistors are used in the 545B trigger circuit. | ||
NPN transistors are used in the 545B trigger circuit. | |||
== Relationship of 545B to 547 == | == Relationship of 545B to 547 == | ||
Some feel that Type 547 replaced Type 545, but this is not quite true; | Some feel that Type 547 replaced Type 545, but this is not quite true; Types 545B and 546/547 were introduced simultaneously. | ||
Types 545B and 546/547 were introduced simultaneously. | It is more correct to say that the 50MHz 546 and 547 were upgrades. (The Type 544 is likewise the upgrade for the 541.) | ||
It is more correct to say that the 50MHz 546 and 547 were upgrades. | |||
(The Type 544 is likewise the upgrade for the 541.) | |||
The Type [[K|53K/54K]] plug-in was introduced with the 545 and 541, | The Type [[K|53K/54K]] plug-in was introduced with the 545 and 541, and until Type [[L|53/54L]] came out in 1957, | ||
and until Type [[L|53/54L]] came out in 1957, | |||
it was the only plug-in that could take full advantage of their bandwidth. | 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 | There was never a full-speed dual-trace plug-in - that would wait until Types [[1A1]] and [[1A2]], which came out with the 545B. | ||
Types [[1A1]] and [[1A2]], which came out with the 545B. | |||
== Rectifiers == | == Rectifiers == | ||
Early 545 units have [[selenium rectifiers]]. | Early 545 units have [[selenium rectifiers]]. Later units have silicon rectifiers. | ||
Later units have silicon rectifiers. | |||
== Rackmount Versions == | == Rackmount Versions == | ||
There were also rack-mount versions. | There were also rack-mount versions. Types RM41 and RM45 were [[introduced in 1957|introduced in October 1957]], | ||
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 Type RM545B 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 Type RM545B was introduced at the same time as Type 545B. | |||
== Clone of 545 == | == Clone of 545 == | ||
Clones of the 545A are the [[Lavoie LA-265A]] and [[Hickok 1805-A]] | Clones of the 545A are the [[Lavoie LA-265A]] and [[Hickok 1805-A]]. These clones were not licensed by Tektronix. | ||
These clones were not licensed by Tektronix. | |||
<nowiki>*</nowiki> 33MHz with a 50MHz plug-in such as Type [[1A1]]. | <nowiki>*</nowiki> 33MHz with a 50MHz plug-in such as Type [[1A1]]. | ||
<gallery> | <gallery> | ||
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Image:Tek 545b vert output.jpg|545B vertical output stage | Image:Tek 545b vert output.jpg|545B vertical output stage | ||
</gallery> | </gallery> | ||
[[Category:Tube_scopes]] | |||
[[Category:Introduced 1955]] | |||