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image=Tek-549 and d.jpg |
image=Tek-549 and d.jpg |
caption=Tektronix 549 front |
caption=Tektronix 549 front |
introduced=1966 |
introduced=1965 |
discontinued=1974 |
discontinued=1974 |
manuals=
manuals=
* [http://w140.com/mmm/tek-549.pdf Tektronix 549 Manual (PDF)]
* [[Media:070-0508-00.pdf|549 Instruction]] (OCR PDF, 22M)
* [http://bama.edebris.com/manuals/tek/549 549 manual on BAMA ]
* [http://w140.com/mmm/tek-549.pdf 549 Instruction (PDF, 162M)]
* [http://w140.com/tek_549_1968_catalog.pdf Tektronix 549 in 1968 Catalog (PDF)]
* [http://bama.edebris.com/manuals/tek/549 549 Instruction @ BAMA (PDF, 27M)]
* [http://w140.com/Tektronix_549_deutsch_300dpi.pdf Tektronix 549 Introduction in German (PDF)]
 
====Maintenance Notes====
* [[Media:tek_549_crt_socket_leak.pdf|Maintenance Note: 549 CRT Socket Leakage (PDF, OCR)]]
* [[Media:tek_549_note_ringing_1a1.pdf|Maintenance Note: 549 Ringing with 1A1 (PDF, OCR)]]
 
====Data Sheets and Catalogs====
* [[Media:tek_549_catalog.pdf|Tektronix 549 in 1968 Catalog (PDF, OCR)]]
* [[Media:tek_549_german_intro.pdf|Tektronix 549 Introduction in German (PDF, OCR)]]
* [[Media:tek_549_Remote_Control_DS.pdf|Tektronix 549 Remote Control Datasheet (PDF, 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).
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{{BeginSpecs}}
{{BeginSpecs}}
{{Spec | Bandwidth | DC to 30 MHz (at -3 dB Point), depending on vertical plug-in  }}
{{Spec | Bandwidth | DC to 30 MHz (−3 dB) with fast plug-ins ([[1A1]], [[1A2]], [[1A4]], [[1A5]]) }}
{{Spec | Rise time | 12 ns }}
{{Spec | Rise time | 12 ns }}
{{Spec | Deflection Factor | 100 mV/Div }}
{{Spec | Writing speed | 5 cm/μs }}
{{Spec | Line Voltage | 104/115/127/208/230 VAC ±10%,selected via primary voltage selector and voltage range selector Switches, 50 Hz 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 | Automatic resetting thermal cutout, in case internal temperature exceeds safe operating level }}
{{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  | 13W x 24L x 17H Inches or 43.2W x 32.9L x 60.7L cm}}
{{Spec | Size  | 43.2 cm × 32.9 cm × 60.7 cm (W/L/H, 13" × 24" × 17")  }}
{{Spec | Weight  | 68 lb or 31Kg }}
{{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 | Construction  | Aluminum alloy chassis, anodized front panel, blue vinyl coated cabinet }}
{{EndSpecs}}
{{EndSpecs}}


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to have linear phase response over this same frequency range.   
to have linear phase response over this same frequency range.   


In the 549, this buffer is implemented as follows:  A [[6DJ8]] tube configured as a
In the 549, this buffer is implemented with a [[6DJ8]] cathode follower at the plug-in interface
cathode follower is used at the interface with the plug-in to present a high impedance
driving an NPN BJT differential amplifier at the bottom of a cascode with a [[7119]] tube on top.   
to the plug-in.  This input stage drives an NPN BJT differential amplifier,
which operates at the bottom of a cascode configuration with a [[7119]] tube on top.   
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]].   


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the common-mode voltage does not have to be zero, and it is not;  
the common-mode voltage does not have to be zero, 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 on the bottom and [[8608]] tubes on the top. 


The vertical deflection plates of the CRT are driven by the plates of an [[8608]]  
After the delay line, the signal enters another cascoded differential amplifier with NPN BJTs
10-watt power pentode through inductive matching/peaking networks.
on the bottom and a pair of 10-watt [[8608]] power pentodes on the top whose plates drive the
CRT's vertical deflection plates of the CRT through inductive matching/peaking networks.


===Non-Distributed Amplifier===   
===Non-Distributed Amplifier===   
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===Storage===
===Storage===
The 549 uses the [[T5490]] CRT.
The 549 uses the [[T5490]] CRT which has two storage targets, upper and lower,
 
The screen 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,
There is a remote control cable/switch, part number 012-0102-00 (photo below),  
part number 012-0102-00 (photo below), that can erase the screen and reset the single sweep.
that can erase the screen and reset the single sweep.  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).


===Power Supply===
===Power Supply===
The 549's power supply provides regulated outputs of −12.4 V, −150 V, +100 V, +225 V, +300 V, +350 V, and +500 V as well as a +475 V unregulated output.
The 549's power supply provides regulated outputs of −12.4 V, −150 V, +100 V, +225 V, +300 V, +350 V, and +500 V as well as a +475 V unregulated output.


Line input is connected to main transformer primary via two switches, one to select 110/230V Range - (which is inside the chassis) and another switch (on the rear of the chassis) to select Low/Medium/High voltage range in both the above line voltage class.
Line input is connected to main transformer primary via two switches, one inside the chassis to select the 110 V or 230 V range, and another on the rear of the chassis to select Low/Medium/High voltage in either range.


Multiple secondary windings feeds diodes for rectification for different voltages. Both center-tap and bridge configuration is used.
Multiple secondary windings feeds diodes for rectification for different voltages. Both center-tap and bridge configuration is used. Transistors and/or tubes are used for regulation.  
Transistors and/or tubes are used for regulation.  


As is common in many Tektronix scopes, all regulated voltages are referred to the negative regulated rail (−150 V in this case) by fixed low-tolerance dividers.  Only the −150 V voltage is trimmed, its reference is a [[5651]] VR tube.  A [[12AX7]] is used as the comparator, three [[12B4]] in parallel are used as series pass tubes. A [[6AU6]] is used as an error amplifier.
As is common in many Tektronix scopes, all regulated voltages are referred to the negative regulated rail (−150 V in this case) by fixed low-tolerance dividers.  Only the −150 V voltage is trimmed, its reference is a [[5651]] VR tube.  A [[12AX7]] is used as the comparator, three [[12B4]] in parallel are used as series pass tubes. A [[6AU6]] is used as an error amplifier.
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The 549 power supply uses a [[delay relay|6N030 delay relay (P/N 148-0021-00)]] to control a relay that switches supply voltages on only after the tubes are warmed up. On power up, only heater voltage is applied to the tubes.  After a delay of up to 60 seconds, the thermal delay relay activates the main relay (driven from unregulated +170 V). This also cuts out the delay relay, which can cool down and will be ready to delay again even after a quick interrupt in power input.
The 549 power supply uses a [[delay relay|6N030 delay relay (P/N 148-0021-00)]] to control a relay that switches supply voltages on only after the tubes are warmed up. On power up, only heater voltage is applied to the tubes.  After a delay of up to 60 seconds, the thermal delay relay activates the main relay (driven from unregulated +170 V). This also cuts out the delay relay, which can cool down and will be ready to delay again even after a quick interrupt in power input.


The 549 has a 65°C/150°F [[thermal cutoff]].
The 549 has a 65°C (150°F) [[thermal cutoff]].
 
The 549 uses a [[120-0423-00]] HV transformer driven by a [[6GF5]] tube from +470 V.


==Links==
==Links==
* [https://lazyelectrons.wordpress.com/2018/01/11/tektronix-549-restoration/ Rajesh's Tek 549 Restoration]
* [https://lazyelectrons.wordpress.com/2018/01/11/tektronix-549-restoration/ Rajesh's Tek 549 Restoration] / [https://www.youtube.com/watch?v=8rWH-uuf60U Video]
* [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]
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==Pictures==
==Pictures==
<gallery>
<gallery>
Tek 549 trace2.jpg
Tek-549 and d.jpg                | 549 front, earlier round bezel
Tek 549 trace2..jpg
Tek 549 mt1.jpg                  | 549 front, later rectangular bezel
Tek 549 trace.jpg
Tek 549 trace2.jpg               |
Tek 549 front fl.jpg
Tek_549-Front.jpeg              |
549_front.jpg|Front of a 549.
Tek_549-Stroage-Ctrl.jpeg        | 549 Storage controls
549_vert_amp.jpg|Vertical amp.
Tek 549 trace2..jpg             |
549_top.jpg|Top view.
Tek 549 trace.jpg               |
549_storage_board.jpg|Storage board.
Tek 549 front fl.jpg             |
549_inside_door.jpg|Power supply behind door.
549_front.jpg                   | Front of a 549
Wellenkino_549-8.jpg|Right side internal.
Wellenkino 549-1.jpg             |
Wellenkino 549-7.jpg
Tek 549 front fl.jpg             |
Wellenkino 549-6.jpg
Tek 549 1a4 1.jpg               |
Wellenkino 549-1.jpg
Tek 549 1a4 2.jpg               |
Tek 012-0102-00.jpg|012-0102-00 remote control for 549
Tek_549-Rear.jpeg                | 549 Rear 
Tek 012-0102-00 photo.jpg|012-0102-00 remote control for 549
Tek_549-Line-Range.jpeg          | Line voltage selector           
Tek 549 mt1.jpg|549 with Rectangular Bezel
Tek 549 1a4 3.jpg               |
Tek 549 front fl.jpg
Tek 549 1a4 4.jpg               |
Tek 549 1a4 1.jpg
549_Delayed_Trace.jpg            | B INTEN BY A Trig in 549
Tek 549 1a4 2.jpg
549_Dual_Trace.jpg               | Dual trace display in 549
Tek 549 1a4 3.jpg
Tek 549-1 knob layout.jpg|549 knob layout
Tek 549 1a4 4.jpg
</gallery>
549_Delayed_Trace.jpg|B INTEN BY A Trig in 549
 
549_Vertical_OP.jpg|8608 Vertical Output Tubes of 549
===Remote Control===
Tek 549 vertamp on.jpg|8608 Vertical Output Tubes of 549
<gallery>
549_Dual_Trace.jpg|Dual Trace in 549
Tek 012-0102-00.jpg             | 012-0102-00 remote control for 549
549_Tubes_ON1.jpg|549 LV Power Supply Tubes
Tek 012-0102-00 photo.jpg       | 012-0102-00 remote control for 549
549_Tubes_ON.jpg| 549 LV Power Supply Tubes
Tek_549-Rempte-2.jpg            | 549 remote control (storage control)
Tek_549-Remote-1.jpg             | 549 remote control rear
</gallery>
 
===Internal===
<gallery>
Tek_549-LHS.jpeg                | LHS
Tek_549-RHS.jpeg                | RHS
Tek_549-RHS-Timebase.jpeg        | RHS Timebase Ch: Door Open
Tek_549-Top.jpeg                | Top
Tek_549-Under.jpeg              | Underside
Tek_549-V-Amp.jpeg              | 8608 vertical output tubes
549_vert_amp.jpg                | Vertical amp
549_Vertical_OP.jpg             | 8608 vertical output tubes
Tek 549 vertamp on.jpg           | 8608 vertical output tubes
549 v out.jpg
549_top.jpg                     | Top view
549_storage_board.jpg           | Storage board
549_inside_door.jpg             | Power supply behind door
Wellenkino_549-8.jpg             | Right side internal
Wellenkino 549-7.jpg            |
Wellenkino 549-6.jpg             |
Tek_549-Prim-Sel-Sw.jpeg        | Primary voltage range selector
549_Tubes_ON1.jpg               | LV power supply tubes
549_Tubes_ON.jpg                 | LV power supply tubes
Tek_549_Storage_Board.jpg        | Storage board Rev "PC" (recapped)
Tek_549-storage_board_Rev_PE.JPG | Storage board Rev "PE"
</gallery>
</gallery>


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[[Category:Introduced in 1966]]
[[Category:Introduced in 1966]]
[[Category:Analog storage scopes]]
[[Category:Analog storage scopes]]
 
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