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|series=500-series scopes
|series=500-series scopes
|model=549
|model=549
|summary=30 MHz storage scope
|summary=30 MHz storage oscilloscope
|image=Tek-549 and d.jpg
|image=Tek-549 and d.jpg
|caption=Tektronix 549 front
|caption=Tektronix 549 front
|introduced=1965
|introduced=1965
|discontinued=1974
|discontinued=1974
|designers=Mel Holtznagel;Bob Shand;
|designers=Mel Holznagel;Bob Shand;
|manuals=
|manuals=
* [[Media:070-0508-00.pdf|549 Instruction]] (OCR PDF, 22M)
* [[Media:070-0508-00.pdf | Tektronix 549 Manual]] (OCR)  
* [http://w140.com/mmm/tek-549.pdf 549 Instruction] (PDF, 162M)
* [https://w140.com/mmm/tek-549.pdf Tektronix 549 Manual]
* [http://bama.edebris.com/manuals/tek/549 549 Instruction @ BAMA (PDF, 27M)]
* [https://bama.edebris.com/manuals/tek/549 Tektronix 549 Manual] @ BAMA


====Maintenance Notes====
====Maintenance Notes====
* [[Media:tek_549_crt_socket_leak.pdf|Maintenance Note: 549 CRT Socket Leakage (PDF, OCR)]]
* [[Media:tek_549_crt_socket_leak.pdf|Maintenance Note: 549 CRT Socket Leakage]] (OCR)
* [[Media:tek_549_note_ringing_1a1.pdf|Maintenance Note: 549 Ringing with 1A1 (PDF, OCR)]]
* [[Media:tek_549_note_ringing_1a1.pdf|Maintenance Note: 549 Ringing with 1A1]] (OCR)


====Data Sheets and Catalogs====
====Data Sheets and Catalogs====
* [[Media:tek_549_catalog.pdf|Tektronix 549 in 1968 Catalog (PDF, OCR)]]
* [[Media:tek_549_catalog.pdf|Tektronix 549 in 1968 Catalog]] (OCR)
* [[Media:tek_549_german_intro.pdf|Tektronix 549 Introduction in German (PDF, OCR)]]
* [[Media:tek_549_german_intro.pdf|Tektronix 549 Introduction in German]] (OCR)
* [[Media:tek_549_Remote_Control_DS.pdf|Tektronix 549 Remote Control Datasheet (PDF, OCR)]]
* [[Media:tek_549_Remote_Control_DS.pdf|Tektronix 549 Remote Control Datasheet]] (OCR)
}}
}}
The '''Tektronix 549''' is the only [[CRT_storage_scope|storage scope]] in the 500 series (except for the [[537]] that never left prototype stage).
The '''Tektronix 549''' is the only [[CRT_storage_scope|storage scope]] in the 500 series (except for the [[537]] that never left prototype stage).


It takes a [[Letter-series_and_1-series_plug-ins|letter-series or 1-series vertical plug-in]].  
It takes a [[Letter-series_and_1-series_plug-ins|letter-series or 1-series vertical plug-in]].  
The 549 was [[introduced in 1966]] and discontinued after 1973.   
The 549 was [[introduced in 1965]] and discontinued after 1973.   


The 549 vertical output stage was designed by [[Mel Holtznagel]].  [[Bob Shand]] did the mechanical design.
The 549 vertical output stage was designed by [[Mel Holznagel]].  [[Bob Shand]] did the mechanical design.


{{BeginSpecs}}
{{BeginSpecs}}
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{{Spec | Rise time | 12 ns }}
{{Spec | Rise time | 12 ns }}
{{Spec | Writing speed | 5 cm/μs }}
{{Spec | Writing speed | 5 cm/μs }}
{{Spec | Line voltage | 104/115/127 or 208/230/254 V<sub>AC</sub> ±10%, selected via primary voltage selector (inside cabinet) and voltage range selector (on rear panel), 50 to 60 Hz }}
{{Spec | Line voltage | 104/115/127 or 208/230/254 V<sub>AC</sub> ±10%, selected via primary voltage selector (inside cabinet) and voltage range selector (on rear panel), 50 to 60 Hz }}
{{Spec | Thermal protection | 65°C (150°F) Automatic resetting [[thermal cutoff]] }}
{{Spec | Thermal protection | 65°C (150°F) Automatic resetting [[thermal cutoff]] }}
{{Spec | Power consumption | 650 W, 750 VA }}
{{Spec | Power consumption | 650 W, 750 VA }}
{{Spec | Size |  43.2 cm × 32.9 cm × 60.7 cm (W/L/H, 13" × 24" × 17")  }}
{{Spec | Size     |  43.2 cm × 32.9 cm × 60.7 cm (W/L/H, 13" × 24" × 17")  }}
{{Spec | Weight | 31 kg (68 lb) }}
{{Spec | Weight   | 31 kg (68 lb) }}
{{Spec | Cooling  | AC Fan }}
{{Spec | Cooling  | AC Fan }}
{{Spec | Construction  | Aluminum alloy chassis, anodized front panel, blue vinyl coated cabinet }}
{{Spec | Accessories  | [[012-0102-00|012-0102-00 remote control cable/switch]] }}
{{EndSpecs}}
{{EndSpecs}}


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The output of the cascode (the plate of the 7119) drives the [[delay line]].   
The output of the cascode (the plate of the 7119) drives the [[delay line]].   


Since the entire signal path is differential,  
Since the entire signal path is differential, the common-mode voltage does not have to be zero,
the common-mode voltage does not have to be zero, and it is not;
and it is not – the differential signal in the delay line rides on 167 volts of DC.   
the differential signal in the delay line rides on 167 volts of DC.   


After the delay line, the signal enters another cascoded differential amplifier with NPN BJTs  
After the delay line, the signal enters another cascoded differential amplifier with NPN BJTs  
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The 549 uses the [[T5490]] CRT which has two storage targets, upper and lower,
The 549 uses the [[T5490]] CRT which has two storage targets, upper and lower,
whose storage mode and erase signals can be controlled independently.
whose storage mode and erase signals can be controlled independently.
There is a remote control cable/switch, part number 012-0102-00 (photo below),
 
that can erase the screen and reset the single sweep. It connects to an  
The [[012-0102-00|012-0102-00 remote control cable/switch]] (also used for [[564B]]) can be used to remotely erase the screen and reset the single sweep.  
[[Amphenol 165 series connectors|Amphenol 165-16 socket]] at the rear top of  
It connects to an [[Amphenol 165 series connectors|Amphenol 165-16 socket]] at the rear top of the scope (see [[549 remote control connector]] for pin-out).
the scope (see [[549 remote control connector]] for pin-out).


===Power Supply===
===Power Supply===
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* [http://www.radiomuseum.org/forum/tektronix_the_storage_story.html Tektronix, the Storage Story]  (1966) @ radiomuseum.org  
* [http://www.radiomuseum.org/forum/tektronix_the_storage_story.html Tektronix, the Storage Story]  (1966) @ radiomuseum.org  
* A [https://www.youtube.com/watch?v=1SRtm7eva0A 549 @ YouTube]
* A [https://www.youtube.com/watch?v=1SRtm7eva0A 549 @ YouTube]
* [https://www.youtube.com/watch?v=D6szONQe1go&t=6s Deon's 549 with 564 HT Transformer]


==Pictures==
==Pictures==
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Tek-549 and d.jpg                | 549 front, earlier round bezel
Tek-549 and d.jpg                | 549 front, earlier round bezel
Tek 549 mt1.jpg                  | 549 front, later rectangular bezel
Tek 549 mt1.jpg                  | 549 front, later rectangular bezel
Tek-549-front.jpg
Tek 549 trace2.jpg              |  
Tek 549 trace2.jpg              |  
Tek_549-Front.jpeg              |
Tek_549-Front.jpeg              |
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549_Delayed_Trace.jpg            | B INTEN BY A Trig in 549
549_Delayed_Trace.jpg            | B INTEN BY A Trig in 549
549_Dual_Trace.jpg              | Dual trace display in 549
549_Dual_Trace.jpg              | Dual trace display in 549
Tek 549-1 knob layout.jpg|549 knob layout
Tek 549-1 knob layout.jpg       | 549 knob layout
</gallery>
Tek 549 - Electronics 1965-08-23.jpg | 549 ad in Electronics 1965-08-23
 
===Remote Control===
<gallery>
Tek 012-0102-00.jpg              | 012-0102-00 remote control for 549
Tek 012-0102-00 photo.jpg        | 012-0102-00 remote control for 549
Tek_549-Rempte-2.jpg             | 549 remote control (storage control)
Tek_549-Remote-1.jpg            | 549 remote control rear
</gallery>
</gallery>


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</gallery>
</gallery>


===HT Transformer modification===
<gallery>
564 HV Transformer installed in the 549.jpeg  | 564 HV transformer installed in the 549
Schematic of HT transformer modifications.jpeg | Schematic showing other changes required
</gallery>
==Components==
{{Parts|549}}
{{Parts|549}}


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