Author Topic: Skip Report  (Read 1540 times)

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SparWeb

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Skip Report
« on: March 07, 2008, 06:48:06 AM »
Everyone should know by now I have a knack for finding neat things that have been discarded.  There are a few junk piles I like to keep an eye on...


Today I snagged this Tektronics unit.  Wow.  Maybe it still works.  In the picture the screen glows from the camera flash.  I can't turn it on until...



...After I fix the power cord!?



And what's with these two red wires hanging out the side?



So when I opened the case and got my flashlight, I found this inside:



Sure enough, the knob is broken.  I guess somebody took the suggestion to "loop compensate" literally - with a loop of wire to compensate for the broken knob!  HAHA



Judging by the red sticker (and others elsewhere) this unit is at least 25 years old, and made its way from London (or Ottawa) to Calgary a long time ago, too.


At first I thought it was a fancy oscilloscope.  Looking up the part #, I see it's actually a Tektronix 576 Curve Tracer.  Whatever the heck that means?  For testing discrete semiconductors?  The CBE markings are pretty obvious clues, but it doesn't seem like the finger-nail sized stuff goes in there.  And I've never seen a fist-sized transistor... or would you usually have a set of kelvin probes in the receptacles?


Anyhow, unless it will work like an oscilloscope as it is, I don't have any use for it.  Any takers?

« Last Edit: March 07, 2008, 06:48:06 AM by (unknown) »
No one believes the theory except the one who developed it. Everyone believes the experiment except the one who ran it.
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Capt Slog

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Re: Skip Report
« Reply #1 on: March 07, 2008, 02:27:44 AM »
Not a bad find at all, if it works.


Looks like a component tester.  I've not seen one specifically built for that before, but we have a couple of scopes around here that have the add-on units to make them into component testers.  I wonder what it takes to make it work the other way?

« Last Edit: March 07, 2008, 02:27:44 AM by Capt Slog »

GeeMac

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Re: Skip Report
« Reply #2 on: March 07, 2008, 07:01:21 AM »
Tektronix 576 Curve Tracer


Measures DC Parameters for 2 & 3 Terminal Semiconductors

Readout for Scale Factors

220 Watts of Power

Includes Standard Test Fixture (Shown Installed in Picture)

Optional Test Fixtures Available

Transistor & Diode Adapter List

Professionally Refurbished

Aligned and Calibrated to Original Specifications

Optional Component Socket Adapters  

« Last Edit: March 07, 2008, 07:01:21 AM by GeeMac »

Opera House

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Re: Skip Report
« Reply #3 on: March 07, 2008, 07:16:10 AM »
Put it on ebay and get yourself a good scope.  These test the gain of transistors at various collector currents and breakdown voltage of PN junctions of transistors and zeners. If you have a scope, a curve tracer can be made for about $5.
« Last Edit: March 07, 2008, 07:16:10 AM by Opera House »

SparWeb

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Re: Skip Report
« Reply #4 on: March 07, 2008, 08:47:55 AM »
I dunno....

Selling on E-bay something I found in the trash sounds... kinda... evil... he he he

« Last Edit: March 07, 2008, 08:47:55 AM by SparWeb »
No one believes the theory except the one who developed it. Everyone believes the experiment except the one who ran it.
System spec: 135w BP multicrystalline panels, Xantrex C40, DIY 10ft (3m) diameter wind turbine, Tri-Star TS60, 800AH x 24V AGM Battery, Xantrex SW4024
www.sparweb.ca

dinges

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Re: Skip Report
« Reply #5 on: March 07, 2008, 08:58:04 AM »
Sparweb


AARGH!


I've been looking into building a transistor curve tracer a while back (there are some good designs about; e.g. the Gootee one: http://www.fullnet.com/~tomg/gooteect.htm)


I've not yet got around to building one, but looking at this picture from yours... [curses removed].


Looks quite as 'sturdy' as my old Tek 535. I hesitate to admit it, but I took it apart for components. The thing used nearly as much energy as a washing machine (66 valves, IIRC). It probably has a lot of ceramic stand-off solder strips in there too. If you repair them, make sure you use the correct type of solder having a few % of silver, otherwise the silver plating may come off.


Peter.

« Last Edit: March 07, 2008, 08:58:04 AM by dinges »
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TomW

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Re: Skip Report
« Reply #6 on: March 07, 2008, 10:04:43 AM »
Spar;


Its obvious to me the red wire is an external method to manipulate the knob. Pretty sneaky, too.


Just from here.


You also now have a nice boat anchor should you need it.


Cheers.


TomW

« Last Edit: March 07, 2008, 10:04:43 AM by TomW »

Opera House

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Re: Skip Report
« Reply #7 on: March 07, 2008, 01:19:26 PM »
At the rates ebay is charging these days, if I don't get it out of the trash or next to free.......It isn't worth listing!
« Last Edit: March 07, 2008, 01:19:26 PM by Opera House »

Opera House

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Re: Skip Report
« Reply #8 on: March 07, 2008, 03:18:45 PM »
RED WIRE......Haven't these people heard of duct tape!
« Last Edit: March 07, 2008, 03:18:45 PM by Opera House »

Lumberjack

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Re: Skip Report
« Reply #9 on: March 07, 2008, 07:27:22 PM »
Your missing banana jacks and the leads...... :}

« Last Edit: March 07, 2008, 07:27:22 PM by Lumberjack »