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-The Tektronix Type 543 is an all-tube 30MHz scope [[introduced in 1958]].  It takes
+{{Oscilloscope Sidebar
-[[letter-series and 1-series plug-ins]].  It is similar to a [[545]], but without the second, delayed timebase.
+|manufacturer=Tektronix
-Instead, it has a range of horizontal magnifiers from X2 to X100.  It has the same six-stage
+|series=500-series scopes
-balanced distributed vertical amplifier (twelve [[6DK6]] tubes) as the 545.
+|model=543
-While the 545 has two non-calibrated X-input sensitivities, the 543 has
+|summary=30 MHz oscilloscope
-an X-input with three calibrated selectable deflection sensitivities: 0.1V/cm, 1V/cm, and
+|image=Tek 543 front.jpg
-V/cm.
+|caption=Tektronix 543 front
+|introduced=1958
+|discontinued=1973
+|designers=Bob Shand;
+|manuals=
+'''543'''
+* [[Media:070-260.pdf|Tektronix 543 Manual]]
+* <small>[https://bama.edebris.com/download/tek/543/Tek%20543.pdf Alternate copy @ BAMA]</small>
+'''543A'''
+* [[Media:070-0260-01.pdf|Tektronix 543A Manual]]
+'''543B'''
+* [[Media:070-429.pdf|Tektronix 543B Manual]] (OCR)  <!-- re-OCRed from https://w140.com/tek_543b.pdf -->
+* ''[[Media:070-437.pdf|070-0437-00 RM543B manual needed]]''
+* [[Media:Tek 543b fcp sep 1967.pdf|Tektronix 543B Factory Calibration Guide, September 1967]]
+'''Calibration etc.'''
+* [[Media:tek_adjust_540_vertical.pdf|How to Adjust the Vertical Amplifier and Delay Line of a 540-Series Oscilloscope]] (OCR)
+* [[Media:tek_543_fcp.pdf|Tektronix 543 Factory Calibration Manual]] (OCR)
+* [[Media:tek_balancing_545_vertical.pdf|Balancing the 540-Series Vertical Amplifier]] (OCR)
+* [[Media:Tek 543 cal procedure.pdf]]
+}}
+The '''Tektronix Type 543''' (rack mount '''RM43''') is an all-tube 30 MHz scope [[introduced in 1958]].
-*[http://bama.edebris.com/download/tek/543/Tek%20543.pdf Tektronix 543 Manual (PDF)]
+It takes [[letter-series and 1-series plug-ins]].
+It is similar to a [[545]], but without the second, delayed timebase. Instead, it has a range of horizontal magnifiers from ×2 to ×100.
+While the 545 has two non-calibrated X-input sensitivities, the 543 has an X input with calibrated deflection sensitivity of 0.1 V/cm, 1 V/cm, or 10 V/cm.
+{{BeginSpecs}}
+{{SpecGroup | 543}}
+{{Spec | Bandwidth | DC to 30 MHz (≤ 3 dB) with [[K|Type K plug-in]]  }}
+{{Spec | Rise time | 0.012 μs }}
+{{Spec | Screen Area | 4 cm × 10 cm}}
+{{SpecGroup | 543B}}
+{{Spec | Bandwidth | DC to 33 MHz (≤ 3 dB) with [[1A1|Type 1A1 plug-in]]  }}
+{{Spec | Rise time | 0.010 μs }}
+{{Spec | Screen Area | 6 cm × 10 cm}}
+{{SpecGroup | all}}
+{{Spec | Line Voltage | 108/115/122/216/230/244 V<sub>AC</sub> ±10%, selected via primary voltage selector and voltage range selector switches, 50 Hz to 60 Hz }}
+{{Spec | Thermal Protection | Automatic resetting thermal cutout, in case internal temperature exceeds safe operating level }}
+{{Spec | Power Consumption | 530 W with [[CA|Type CA plug-in]] }}
+{{Spec | Cooling  | AC Fan }}
+{{Spec | Trigger Modes | AC/DC/AC LF Reject, and HF Sync}}
+{{Spec | Anode Potential | 10 kV}}
+{{Spec | Construction  | Aluminum alloy chassis. Anodized front panel}}
+{{Spec | Weight| 27.8 kg (61.5 lbs) }}
+{{EndSpecs}}
+==Internals==
+The '''543''' has the same six-stage balanced [[distributed amplifier]] (twelve [[6DK6]] tubes) as the 545,
+driving a lumped L/C delay line just before the deflection plates.
+Total acceleration voltage on the CRT is 10 kV. The CRT power supply uses five [[5642]] HV tube diodes.
+The standard CRT for the 543 is the [[T65]] with P2 [[phosphor]], part number 154-175.
+The '''543B''' is a tube/transistor hybrid scope.
+The vertical amplifier has a [[6DJ8]] cathode follower stage followed by
+two transistor/tube cascode stages with a 186 Ω [[delay line]] in-between.
+The standard CRT for the 543B is part number [[154-0478-00]],
+also known as the [[T5470]]-31-2.
+There is a rackmount version, Type RM543B.
+''Question: Does a model 543A exist?'' Yes, but 543A specification  are needed.
+==Pictures==
+===543===
+<gallery>
+Tek 543 with d.jpg    | 543 with [[D|D Plugin]]
+Tek 543 front.jpg     | 543 front view
+Tek 543 top2.jpg      | 543 top
+Tek 543 right.jpg     | 543 right
+Tek 543 top.jpg       | 543 top
+Tek 543 left.jpg      | 543 left
+Tek 543 rear.jpg      | 543 rear
+Tek-543 block.png     | 543 Block Diagram
+Tek-543 horizontal amp.png|543 Horizontal Amplifier
+Tek-543 vertamp.png   |543 Vertical Amplifier
+Tek-543 trigger.png   |543 Trigger
+Tek-543 timebase gen.png|543 Timebase
+Tek-543 delay.png     |543 Delay Line
+Tek-543 crt circuit.png|543 CRT Circuit
+Tek-543 lvps.png      |543 Low-Voltage Power Supply
+Tek-543 calibrator.png|543 Calibrator
+</gallery>
+===543A===
+<gallery>
+Tek 543A front.jpg | front view of 543A
+Tek 543A left.jpg | Internal left side of 543A
+Tek 543A right.jpg | Internal right side of 543A
+Tek 543A top.jpg | Internel top of 543A
+Tek 543A trims.jpg | Internal trim pots on top of 543A
+</gallery>
+===543B===
+<gallery>
+Tek 543b with bnc ca.jpg|543B with [[CA]]
+Tek_543b.jpg|543B
+Tek 543 b 2.jpg|543B
+</gallery>
+===RM543B===
+<gallery>
+RM543B_1.JPG|RM543B
+RM543B_2.JPG|RM543B side
+</gallery>
+==Components==
+{{Parts|543}}
+{{Parts|543A}}
+{{Parts|543B}}
+{{Parts|RM43}}
+{{Parts|RM543B}}
+[[Category:500 series scopes]]