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|class=Curve Tracer
|class=Curve Tracer
|model=575
|model=575
|summary=Transistor Curve Tracer
|summary=Curve tracer for transistors
|image=Tek_575-Front-Trace.jpeg  
|image=Tek_575-Front-Trace.jpeg  
|caption=Tektronix 575  
|caption=Tektronix 575  
|introduced=1957  
|introduced=1957  
|discontinued=1972  
|discontinued=1972  
|designers=John Kobbe;
|designers=John Kobbe
|manuals=
|manuals=
* [[Media:070-255.pdf|Tektronix 575 and 175 Manual]] (PDF)
* [[Media:070-255.pdf|Tektronix 575 and 175 Manual]]
 
* [[Media:tek-575-122c.pdf|Tektronix 575 with Mod 122C Manual]]
* [http://w140.com/tek-575-122c.pdf Tektronix 575 with Mod 122C Manual (PDF)]
* [[Media:Tek 575 rackmount.pdf|Tektronix 575 rackmount images]]
* [[Media:Tek 575 rackmount.pdf|Tektronix 575 rackmount images]]


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'''Modifications'''  
'''Modifications'''  
* [[Media:Tek_575_Mod_Summaries.pdf|Tektronix 575 Modification Summaries]] / <small> [[Media:Tektronix575ModSummaries.pdf|Tektronix 575 Modification Summaries]]</small>
* [[Media:Tek_575_Mod_Summaries.pdf|Tektronix 575 Modification Summaries]] / <small> [[Media:Tektronix575ModSummaries.pdf|Tektronix 575 Modification Summaries]]</small>
* [https://w140.com/tektronix_575_mod_122c_modifications.pdf Mod 122C Kit Manual (PDF)]
* [[Media:Tektronix_575_mod_122c_modifications.pdf|Mod 122C Kit Manual]]
* [[Media:Tek 575mod122c correspondence.pdf|Correspondence Regarding 575 Mod 122A and C]]
* [[Media:Tek 575 mod 122D.pdf|Modification 122D]]
* [[Media:Tek 575 mod 122D.pdf|Modification 122D]]
* [[Media:Tek 575 mod 122c description 1961.pdf|Tektronix 575 Mod 122C Description 1961]]
* [[Media:Tek 575 mod 122c description 1961.pdf|Tektronix 575 Mod 122C Description 1961]]
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* [[Media:Tek 575 122c parts list.pdf|Tektronix 575 Mod 122C Parts List]]
* [[Media:Tek 575 122c parts list.pdf|Tektronix 575 Mod 122C Parts List]]
* [[Media:040-0223-00.pdf|Mod M5272: Silicon Rectifier]]
* [[Media:040-0223-00.pdf|Mod M5272: Silicon Rectifier]]
* [[Media:040-0276-00.pdf|Mod 122C: Increased collector volts]]
* [[Media:050-0021-00.pdf|Mod M2058, M10070, M8244: Base Step Generator Polarity Switch Replacement]]
* [[Media:050-0021-00.pdf|Mod M2058, M10070, M8244: Base Step Generator Polarity Switch Replacement]]
* [[Media:050-0070-01.pdf|Mod M6375: Transistor Selector Switch Replacement]]
* [[Media:050-0070-01.pdf|Mod M6375: Transistor Selector Switch Replacement]]
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* [[Media:050-0383-00.pdf|Mod M12361: Horizontal and Vertical Amplifier Tube Replacement]]
* [[Media:050-0383-00.pdf|Mod M12361: Horizontal and Vertical Amplifier Tube Replacement]]
* [[Media:Jan 1959 tek 575 fcp with cal check.pdf]]
* [[Media:Jan 1959 tek 575 fcp with cal check.pdf]]
* [[Media:Tek 575 rackmount westinghouse.pdf|Rackmount 575]]


'''Calibration'''
'''Calibration'''
* [http://w140.com/tek_fcp/tek_575_fac_cal.pdf Tektronix 575 Factory Calibration Procedure (PDF)]
* [[Media:tek_575_fac_cal.pdf|Tektronix 575 Factory Calibration Procedure]]
* [http://w140.com/tek_3-terminal_adapter_013-0069-00.pdf 013-0069-00 3-Terminal Adapter (PDF)]
* [[Media:tek_3-terminal_adapter_013-0069-00.pdf|013-0069-00 3-Terminal Adapter]]
* [[Media:Tek 575 cal outline.pdf]]
* [[Media:Tek 575 cal outline.pdf]]


'''Miscellaneous'''
'''Miscellaneous'''
* [[Media:Nuvistor checking procedure with 575.pdf|Nuvistor Checking Procedure with 575 (PDF, needs OCR)]]
* [[Media:Nuvistor checking procedure with 575.pdf|Nuvistor Checking Procedure with 575]]
* [[Media:575_Usage_-_Some_Transistor_Measurements_Using_the_575.pdf|Some Transistor Measurements Using the Type 575]]
* [[Media:Tek 175 higher voltage discussion.pdf|Discussions of Modification to 575 for Higher Voltage]]
* [[Media:Tek 575a discussion.pdf|Discussion of Possible 575A]]
</small>
</small>
}}
}}
The '''Tektronix 575''' is a curve tracer for transistors, [[introduced in 1957|introduced in March 1957]].
The '''Tektronix 575''' is a curve tracer for transistors, [[introduced in 1957|introduced in March 1957]].
It can be thought of as being composed of three modules:
 
an X-Y display, a step source, and a collector sweep source.
It can be thought of as being composed of three modules: an X-Y display, a step source, and a collector sweep source.
 
Unlike later curve tracers, the 575 can optionally display base voltage on the vertical axis.


{{BeginSpecs}}
{{BeginSpecs}}
{{Spec | Collector Sweep | 0−200 V minimum peak with 1 A current curves, 0−20 V minimum peak with 20 A current curves }}
{{Spec | Collector Sweep     | 0−200 V minimum peak with 1 A current curves, 0−20 V minimum peak with 20 A current curves }}
{{Spec | Vertical Display | plots collector current from 0.01 mA/div to 1 A/div ±3% in 16 Steps }}
{{Spec | Vertical Display   | I<sub>C</sub> 0.01 mA/div to 1 A/div ±3% in 16 Steps, or U<sub>B</sub> 0.01 V/div to 0.5 V/div ±3% in 6 Steps }}
{{Spec | Vertical Display | plots base voltage from 0.01 V/div to 0.5 V/div ±3% in 6 Steps }}
{{Spec | Horizontal Display | U<sub>C</sub> 0.01 V/div to 20 V/div ±3% in 11 Steps, or U<sub>B</sub> 0.01 V/div to 0.5 V/div ±3% in 6 Steps }}
{{Spec | Horizontal Display | plots collector voltage from 0.01 V/div to 20 V/div ±3% in 11 Steps }}
{{Spec | CRT                 | [[T0520]], P1 phosphor, P2/P7/P11 on request; 4.2 kV acceleration }}
{{Spec | Horizontal Display | plots base voltage from 0.01 V/div to 0.5 V/div ±3% in 6 Steps }}
{{Spec | Power              | 105−125 V or 210−250 V<sub>AC</sub>, 50 to 60 Hz; 200 W in standby, 400 W max; thermal cutoff}}
{{Spec | CRT | T52P, P1 phosphor, P2/P7/P11 on request ; 4.2 kV acceleration }}
{{Spec | Size               |  (W/L/H) 13" × 24" × 16¾"  }}
{{Spec | Line voltage | 105−125 V or 210−250 V<sub>AC</sub>, 50 to 60 Hz }}
{{Spec | Weight             | ~30 kg (70 lb) }}
{{Spec | Power | 200 W in standby, 400 W max − Actual consumption based on transistor being tested }}
{{Spec | Size |  (W/L/H) 13" × 24" × 16¾"  }}
{{Spec | Weight | ~30 kg (70 lb) }}
{{Spec | Cooling  | AC Fan }}
{{Spec | Construction  | Aluminum alloy chassis, anodized front panel, blue vinyl coated cabinet }}
{{EndSpecs}}
{{EndSpecs}}
==Links==
* [https://lazyelectrons.wordpress.com/2018/10/13/tektronix-575-curve-tracer-restore/ A Tek 575 Restoration with video]
* [https://w140.com/tek_575_use.pdf ''A Power Curve Tracer At Surplus Prices''], by [[Dennis Feucht]]
* [https://www.oscilloscopemuseum.com/oscilloscope-tektronix-575-s1957.html Tek 575 @ oscilloscopemuseum.com]
* [https://techchannel.att.com/play-video.cfm/2011/7/1/AT&T-Archives-Microworld Tek 575 in AT&T film "Microworld" (1976)] at ~6:00
* [http://www.ke5fx.com/A_VTCT_Adapter_for_All_Tektronix_SCTs_W7PF.pdf Dennis Tillman: An Inexpensive Vacuum Tube Curve Tracer Adapter for All Tektronix Semiconductor Curve Tracers]
* [https://www.youtube.com/watch?v=Ix7ju0Q8YZg Zenwizard Studios - Curve Tracer Basics]
* [https://www.youtube.com/watch?v=Wpok66re3G0 Zenwizard Studios - Zen's Curve Tracer Buying Guide]
{{Documents|Link=575}}
{{Documents|Link=Curve tracers}}


==History==
==History==
[https://vintagetek.org/my-early-tektronix-days-by-john-kobbe-2/ John Kobbe says]:
[https://vintagetek.org/my-early-tektronix-days-by-john-kobbe-2/ John Kobbe says]:
<blockquote>
<blockquote>
While I was working on the 540 series vertical amplifier, Virgil Briton, whose bench was next to me, had put together a vacuum tube curve tracer using stepping relays and other mechanical devices. I remember thinking that, that was a neat display even if it did a lot clicking and was slow. After putting the cross hatch generator together, I knew it would be very easy to do the curve tracer electronically,it started for in house use,but after putting a self-contained instrument together, Tek decided to call it 575 and sell it.
When transistors started to become practical, Tek sent [[Bill Polits]] to Michigan, for a 2 week primer on transistors.
He in turn communicated it to the rest of us who were interested. That called for a transistor curve tracer.
It used a similar step generator as the tube curve tracer but otherwise needed mostly new circuits.  
I remember a day at the beach, I was trying to hide from the sun while everyone else was getting their sunburn.  
I dug the sand out from under our new 1954 Chevy, got comfortable and figured out the circuits for the curve tracer soon to become the 575.
[[Deane Kidd]] did the hard part when he designed the switches.
</blockquote>
</blockquote>
==Internals==
==Internals==
=== X-Y display ===
=== X-Y display ===
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Early 575 versions used [[selenium rectifiers]].
Early 575 versions used [[selenium rectifiers]].
A kit for conversion to silicon diodes was available and is documented in the back of the manual.   
A kit for conversion to silicon diodes was available and is documented in the back of the manual.   
===CRT===
The 575 uses the Tektronix [[T0520]] CRT.
The 575 has a [[thermal cutoff]]. 


== Type 175 High Current Adaptor ==
== Type 175 High Current Adaptor ==
[[File:Tek 575 on 175.jpg | thumb | right | 575 on top of a [[175]]]]
[[File:Tek 575 on 175.jpg | thumb | right | 575 on top of a [[175]]]]
The 575 can be paired with a [[175]] for high current device measurements.
The 575 can be paired with a [[175]] for high current device measurements.
==Links==
* [https://lazyelectrons.wordpress.com/2018/10/13/tektronix-575-curve-tracer-restore/ A Tek 575 Restoration with video]
* [http://w140.com/tek_575_use.pdf "A Power Curve Tracer At Surplus Prices" by Dennis L. Feucht (PDF)]
* [http://www.oscilloscopemuseum.com/oscilloscope-tektronix-575-s1957.html Tek 575 @ oscilloscopemuseum.com]
* [http://techchannel.att.com/play-video.cfm/2011/7/1/AT&T-Archives-Microworld Tek 575 in AT&T film "Microworld" (1976)] at ~6:00
* [http://www.ke5fx.com/A_VTCT_Adapter_for_All_Tektronix_SCTs_W7PF.pdf Dennis Tillman: An Inexpensive Vacuum Tube Curve Tracer Adapter for All Tektronix Semiconductor Curve Tracers]


==See Also==
==See Also==
* [[067-078]]
* [[067-078]]
* [[Nuvistor Checker-Balancer]]


==Pictures==
==Pictures==
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Tek_575_5651_VRCurve.jpg | 5651 VR Tube in 575
Tek_575_5651_VRCurve.jpg | 5651 VR Tube in 575
Tek_575_NPN-hfe_Curve.jpg | hFE curve of a 2N3904 in 575
Tek_575_NPN-hfe_Curve.jpg | hFE curve of a 2N3904 in 575
Tek 575 with 175.jpg|575 with 175
</gallery>
</gallery>
===Internal===
===Internal===
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</gallery>
</gallery>


==Components==
{{Parts|575}}
{{Parts|575}}


[[Category:Curve tracers]]
[[Category:Curve tracers]]
Zenwizard
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