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title=Tektronix 547 | | title=Tektronix 547 | | ||
summary=50 MHz scope | | summary=50 MHz scope | | ||
image=Tek 547 | image=Tek 547 D-Alt-Trace.jpeg| | ||
caption=Tektronix 547 with [[ | caption=Tektronix 547 with [[1A1]] plugin, in ALT Delayed Trigger | | ||
introduced=1964 | | introduced=1964 | | ||
discontinued=1975 | | discontinued=1975 | | ||
Line 10: | Line 10: | ||
* [http://bama.edebris.com/download/tek/547/547.djvu Tektronix 547 Manual (DjVu)] | * [http://bama.edebris.com/download/tek/547/547.djvu Tektronix 547 Manual (DjVu)] | ||
* [http://w140.com/tek_547.pdf Tektronix 547 Manual (PDF, 60MB)] | * [http://w140.com/tek_547.pdf Tektronix 547 Manual (PDF, 60MB)] | ||
<!-- * [[Media:Tek 547 544 546 technical instruction and training.pdf|Tektronix 547, 546, and 544 Technical Instruction and Training (PDF, needs OCR)]] --> | |||
* [[Media:070-0398-00.pdf|Tektronix 547 Manual (PDF, OCR, 60MB, bad-OCR)]] | |||
* [[Media:Tek_547_544_546_tech_instr_and_training.pdf|Tektronix 547, 546, and 544 Technical Instruction and Training (PDF, OCR)]] | |||
* [[Media:Tek 547 fcp.pdf|Tektronix 547 Factory Calibration Procedure]] | |||
<small> | |||
'''Modifications''' | |||
* [[Media:050-0479-01.pdf|Disconnect Diode 547/R547 Serials 100-12479 (PDF)]] Tek Part [[050-0479-01]] | |||
</small> | |||
}} | }} | ||
The '''Tektronix 547''' is a 50 MHz scope that takes [[letter-series and 1-series plug-ins]]. | The '''Tektronix 547''' is a 50 MHz scope that takes [[letter-series and 1-series plug-ins]]. | ||
It has two identical timebases and, | |||
when used with the [[1A1]], [[1A2]], or [[1A4]], | It has two identical timebases and, when used with the [[1A1]], [[1A2]], or [[1A4]], | ||
has the ability to display one input with one time scale and another input with a different time scale. | has the ability to display one input with one time scale and another input with a different time scale. | ||
The effect is similar to a [[dual-beam scopes|dual-beam scope]] | The effect is similar to a [[dual-beam scopes|dual-beam scope]] | ||
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The project lead for the development of the Tektronix [[544]], [[546]], and 547 was [[Bob Rullman]]. | The project lead for the development of the Tektronix [[544]], [[546]], and 547 was [[Bob Rullman]]. | ||
{{BeginSpecs}} | |||
{{Spec | Bandwidth | DC to 50 MHz (−3 dB) with fast plug-ins ([[1A1]], [[1A2]]) }} | |||
{{Spec | Rise time | 7 ns with [[1A1]] }} | |||
{{Spec | Line voltage | 90-136 V or 180-272 V, selected via primary voltage selector (inside cabinet) and voltage range selector (on rear panel), 50/60/400 Hz }} | |||
{{Spec | Sweep Rates | 100 ns/div to 5 s/div}} | |||
{{Spec | Trigger Coupling | AC, DC, AC LF Rej}} | |||
{{Spec | External Horizontal Input | 100 mV/cm to 10 V/cm, DC to 400 kHz}} | |||
{{Spec | CRT | [[T5470]], 10 kV acceleration, 6x10 cm viewing area }} | |||
{{Spec | Calibrator | ~1 kHz, 200 μ V<sub>p-p</sub> to 100 V<sub>p-p</sub> }} | |||
{{Spec | Power consumption | 510 W }} | |||
{{Spec | Cooling | AC Fan }} | |||
{{EndSpecs}} | |||
==Internals== | ==Internals== | ||
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The usual solution is to scavenge a replacement transformer from another scope. | The usual solution is to scavenge a replacement transformer from another scope. | ||
As a labor of love, hobbyists have been known to rebuild the HV transformers. | As a labor of love, hobbyists have been known to rebuild the HV transformers. | ||
This is discussed from time to time on the Yahoo TekScopes forum. | This is discussed from time to time on the groups.io (formerly Yahoo) TekScopes forum. | ||
===Vertical Amplifier=== | ===Vertical Amplifier=== | ||
The 547 has a five-stage BJT vertical amplifier that is fully differential from the plug-in | The 547 has a five-stage BJT vertical amplifier that is fully differential from the plug-in | ||
connector to the CRT vertical deflection plates. | connector to the CRT vertical deflection plates. | ||
There is one tube in the vertical signal path, | |||
a [[12AT7]] acting as a unity-gain buffer between the plug-in connector and the vertical amplifier. | a [[12AT7]] acting as a unity-gain buffer between the plug-in connector and the vertical amplifier. | ||
====Spoiler Switch==== | |||
The plug-in bay of the 547 has a "spoiler switch" that only enables the full bandwidth of the 547's | |||
vertical signal path when certain relatively modern plug-ins are used, | |||
such as the [[1A1]], [[1A2]], [[1A4]], [[1L30]], and [[1L40]]. | |||
Those plug-ins have a small hole to the left of the plug-in to mainframe connector, | |||
so they can be fully inserted without pressing the spoiler switch. | |||
* [[Media:Spoiler switch rationale from Tek 547 544 546 tech instr and training.pdf|Spoiler switch explanation excerpted from Tek 547 544 546 Technical Instruction and Training (PDF)]] | |||
* [[Media:Spoiler switch rationale from Tek 547 notes.pdf|Spoiler switch explanation excerpted from Tek 547 Notes (PDF)]] | |||
====Delay Line==== | |||
There is a 170 nanosecond [[delay line]] between the first and second gain stages. | There is a 170 nanosecond [[delay line]] between the first and second gain stages. | ||
===Power Supply === | ===Power Supply === | ||
The 547's power supply provides regulated outputs of −150 V, +100 V, +225 V, +350 V, as well as a +325 V unregulated output for CRT HV section. | The 547's power supply provides regulated outputs of −150 V, +100 V, +225 V, +350 V, | ||
as well as a +325 V unregulated output for CRT HV section. | |||
Multiple secondary windings feeds diodes for rectification for different voltages. | |||
Both center-tap and bridge configuration is used. Its a all Tube design for the regulation. | |||
There are multiple 6.3V secondary outputs for heaters, | |||
many elevated to different voltage levels based on the section/tube its used for to keep the Heater-Cathode voltage level within limits. | |||
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. | |||
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 [[OG3]] VR tube. A [[12AX7]] is used as the comparator | Only the −150 V voltage is trimmed, its reference is a [[OG3]] VR tube. | ||
A [[12AX7]] is used as the comparator and two [[6CW5]] in parallel are used as series pass tubes. | |||
Most other | A [[6AU6]] is used as an error amplifier. | ||
Most other power supply sections in the 547 replicate the same basic design, | |||
except slight changes in tubes used − the +225 V and +100 V regulators employ a [[6080]] as the pass element, +350 uses a [[6CW5]]. | |||
The plate voltage delay circuit is similar to that found in many may other Teks of the same era. | |||
A 6N030 delay tube (P/N 148-0021-00) controls a relay that switches plate supply voltages on only after the tubes are warmed up. | |||
Heater voltage is applied to all tubes immediately when the power switch is turned on. | |||
==Links== | ==Links== | ||
* [https://lazyelectrons.wordpress.com/2018/07/06/tektronix-547-oscilloscope-restoration 547 Restoration with video] | |||
* Tek 547 in "Reading Jim Williams" blog: [http://readingjimwilliams.blogspot.com/2011/10/scope-sunday-13.html Scope Sunday 13] and [http://readingjimwilliams.blogspot.com/2012/02/vintage-scopes-are-better-part-1.html Vintage Scopes are Better, pt.1] | * Tek 547 in "Reading Jim Williams" blog: [http://readingjimwilliams.blogspot.com/2011/10/scope-sunday-13.html Scope Sunday 13] and [http://readingjimwilliams.blogspot.com/2012/02/vintage-scopes-are-better-part-1.html Vintage Scopes are Better, pt.1] | ||
* "MightyOhm" blog: [http://mightyohm.com/blog/2012/02/an-analog-life-my-pilgrimage-to-the-workbench-of-analog-guru-jim-williams/ Jim Williams workbench] | * "MightyOhm" blog: [http://mightyohm.com/blog/2012/02/an-analog-life-my-pilgrimage-to-the-workbench-of-analog-guru-jim-williams/ Jim Williams workbench] | ||
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* [http://www.ebay.com/gds/The-Tektronix-547-Oscilloscope-Magic-in-the-Box-/10000000000725321/g.html The Tektronix 547 Oscilloscope - Magic in the Box] | * [http://www.ebay.com/gds/The-Tektronix-547-Oscilloscope-Magic-in-the-Box-/10000000000725321/g.html The Tektronix 547 Oscilloscope - Magic in the Box] | ||
* [http://www.thevalvepage.com/testeq/tek/547/547.htm J.Evans's 547 page] | * [http://www.thevalvepage.com/testeq/tek/547/547.htm J.Evans's 547 page] | ||
==Common Problems== | |||
* See [[547/Repairs]] | |||
==Pictures== | ==Pictures== | ||
===547=== | |||
<gallery> | <gallery> | ||
Tek 547 1a2 new.jpg | Tek 547 trace.jpg | 547 with [[1A2]] | ||
Tek 547 1a2 new.jpg|547 with [[1A2]] | |||
Tek 547.jpg|Front view | Tek 547.jpg|Front view | ||
Tek 547 eng.jpg|547 serial "ENG B 23" | |||
Tek 547 eng2.jpg|547 serial "ENG B 23" | |||
Tek | |||
Tek | |||
Tek 547 ampex front.jpg | Tek 547 ampex front.jpg | ||
Tek 547 | Tek_547_Delayed_Trigger1.JPG | Tek 547 Delayed Trigger & ALT Sweep | ||
Tek 547 | Tek_547_Delayed_Trigger2.jpg | Tek 547 Delayed Trigger & ALT Sweep | ||
Tek 547 trace two sine.jpg|547 trace | |||
Tek 547 1a1 front.jpg|547 with [[1A1]] | |||
Tek_547_4-Trace.jpg | 547 with 1A2 in ALT Sweep Mode | |||
Tek_547_Delayed_Trig.jpg | 547 Delayed Trace | |||
Tek 547 ampex right external.jpg | Tek 547 ampex right external.jpg | ||
Tek 547 ampex rear.jpg | Tek 547 ampex rear.jpg | ||
Grey face 547.jpg|Gray 547 | Grey face 547.jpg|Gray 547 | ||
Tek 547 rear close.jpg | Tek 547 rear close.jpg | ||
Tek 547 rear connections.jpg|rear connections | Tek 547 rear connections.jpg|rear connections | ||
</gallery> | |||
===547 Internals=== | |||
<gallery> | |||
Tek_547-Top.jpeg | Internals - Top | |||
Tek_547-RHS-TBOpen.jpeg | Internals - RHS | |||
Tek_547-RHS.jpeg | Internals - Time Base - RHS | |||
Tek_547-Internal-LHS.jpeg | Internals - LHS | |||
Tek_547-Internal-Bottom.jpeg | Internals - Bottom | |||
Tek_547_HVSection-NoCover.jpg | Tek 547 HV Section and [[5642]]HV Rectifier Tube (Cover removed) | |||
Tek_547-TunnelDiodes-Trigger.jpg | Tunnel Diodes TD253 and TD3A in a Tek 547 Trigger/ Sweep Section | |||
Tunnel_DIode_1D2_2.2mA.jpg | 2.2 mA Tunnel Diode in 547 Delay Pickoff | |||
Tek_547_Vert_Amp.jpg | Tek 547 Vertical Amplifier | Tek_547_Vert_Amp.jpg | Tek 547 Vertical Amplifier | ||
547_01.JPG|Top | |||
547_02.JPG|Right | |||
547_03.JPG|Left | |||
Tek_547_CRT1.jpg | Tek 547 CRT | Tek_547_CRT1.jpg | Tek 547 CRT | ||
Tek_547_CRT2.jpg | Tek 547 CRT Side View | Tek_547_CRT2.jpg | Tek 547 CRT Side View | ||
Tek_547_CRT_Def_Plates1.jpg | Tek 547 CRT Deflection Plates & Assembly | Tek_547_CRT_Def_Plates1.jpg | Tek 547 CRT Deflection Plates & Assembly | ||
Tek_547_CRT_Def_Plates2.jpg | Tek 547 CRT Electron Gun Assembly | Tek_547_CRT_Def_Plates2.jpg | Tek 547 CRT Electron Gun Assembly | ||
Tek_547_Chassis_Without_CRT.jpg | Tek 547 Chassis Without CRT and Plug in | Tek_547_Chassis_Without_CRT.jpg | Tek 547 Chassis Without CRT and Plug in | ||
Tek_547_Screen.jpg | Tek 547 Screen Scale | Tek_547_Screen.jpg | Tek 547 Screen Scale | ||
Tek_547_Power-Transformer3.jpg | Tek 547 Main Transformer | Tek_547_Power-Transformer3.jpg | Tek 547 Main Transformer | ||
Tek_547_Power-Transformer2.jpg | Tek 547 Main Transformer | Tek_547_Power-Transformer2.jpg | Tek 547 Main Transformer | ||
Tek_547_Power-Transformer1.jpg | Tek 547 Main Transformer | Tek_547_Power-Transformer1.jpg | Tek 547 Main Transformer | ||
Tek_547_Tubes.jpg | Tek 547 Inside view with Power ON | Tek_547_Tubes.jpg | Tek 547 Inside view with Power ON | ||
Tek_547_Transformer.jpg | 547 LV Transformer Connections | Tek_547_Transformer.jpg | 547 LV Transformer Connections | ||
Tek_547_Inside_Tubes.jpg | Inside a Tek 547 | Tek_547_Inside_Tubes.jpg | Inside a Tek 547 | ||
Tek 547 ampex right internal.jpg | |||
Tek 547 ampex left internal.jpg | |||
</gallery> | |||
=== RM 547=== | |||
<gallery> | |||
Tek rm547.jpg|RM547 | |||
Tek rm547 trace.jpg | |||
Tektronix rm547.jpg | |||
</gallery> | </gallery> | ||
=== Schematics === | |||
<gallery> | |||
Tek-547-trigger a.png|Trigger A | |||
Tek-547 vert amp2.png|Vertical amplifier | |||
</gallery> | |||
[[Category:500 series scopes]] | [[Category:500 series scopes]] |