575: Difference between revisions

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@@ Line 3: / Line 3: @@
 |class=Curve Tracer
 |model=575
-|summary=Transistor Curve Tracer
+|summary=Curve tracer for transistors
 |image=Tek_575-Front-Trace.jpeg
 |caption=Tektronix 575
@@ Line 18: / Line 18: @@
 * [[Media:Tek_575_Mod_Summaries.pdf|Tektronix 575 Modification Summaries]] / <small> [[Media:Tektronix575ModSummaries.pdf|Tektronix 575 Modification Summaries]]</small>
 * [[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 122c description 1961.pdf|Tektronix 575 Mod 122C Description 1961]]
@@ Line 42: / Line 43: @@
 '''Miscellaneous'''
-* [[Media:Nuvistor checking procedure with 575.pdf|Nuvistor Checking Procedure with 575]] (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]]
@@ Line 49: / Line 50: @@
 }}
 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.
+Unlike later curve tracers, the 575 can optionally display base voltage on the vertical axis.
 {{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}}
+==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==
 [https://vintagetek.org/my-early-tektronix-days-by-john-kobbe-2/ John Kobbe says]:
 <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>
-:''Note:'' The first curve tracer was the [[570]] in 1955; the [[541]] was released in 1955 as well, so the above appears to refer to the 570, not the 575.
 ==Internals==
@@ Line 109: / Line 124: @@
 Early 575 versions used [[selenium rectifiers]].
 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 ==
 [[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.
-==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]
 ==See Also==
@@ Line 199: / Line 202: @@
 </gallery>
+==Components==
 {{Parts|575}}
 [[Category:Curve tracers]]