Using The Tektronix 575 Curve Tracer - Page 3 - diyAudio
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Old 31st January 2010, 04:22 PM   #21
llwhtt is offline llwhtt  United States
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rtirion,

I know where a couple of them are and that's all I know. I don't even know what the price is. Next time I'm in that area I'll stop in and check them out. I do know they don't have any 575s to go with the 175s so they may not even know what they are.

Craig
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Old 31st January 2010, 05:54 PM   #22
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If you decide to check them out, I would be very happy with a price quote
and details.

I will be patient.
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Old 31st January 2010, 05:58 PM   #23
llwhtt is offline llwhtt  United States
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The 175s aren't going anywhere soon as they've been there for years, I'm thinking nobody knows what they are. You have to have a 575 to use them and how many people still have 575s? I'll let you know, I need to go there anyway for other stuff.

Craig
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Old 31st January 2010, 07:37 PM   #24
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Quote:
Originally Posted by Mark A. Gulbrandsen View Post
I have my recently aquired $20.00 Tektronix 575 up and running pretty well.... Has anyone on this site ever used a curve tracer.... I would like to use it for matching devices in several parameters. I am still awaiting the proper 10X10 graticule for it but I thought I'd post this and see if anyone can give any pointers about using one of these. I do have the manuals for it but its pretty easy tog et lost... and because of the 1959 date on the scope I would assume the book was surely written with testing germanium devices in mind. I know these can deal with any modern silicon device including MOSFETs and FET devices....

The display shows an MJE15033 transistor under low current test. The 575 can supply up to 200 volts and 2 amps of current for testing devices. I already truipped the front panel breaker once testing this device but it has survived my brutality.

Thanks in advance for any tips!!
Mark
There is a nice irony in using a 36 tube unit to measure transistors. I have an old Heathkit IT-1121 curve tracer which has paid for itself over the years in the occasional 'tough dog'. The Heath tracer is limited to 40 watts drive, 40V @1A or 200V @ 200mA but it's sufficient to prove the point.

G
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Old 31st January 2010, 08:05 PM   #25
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The TEK 575 is a wonderful unit. First used one professionally in 1966. Owned one in the 70's-90's. Finally, the master transformer failed. Still, it is a wonderful unit, but not necessarily for super matching. Actually DC meters do that better, BUT voltage breakdown, matching mosfets, and general characteristics of devices, are great in this unit. Try a tunnel diode, sometime.
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Old 10th February 2010, 06:28 PM   #26
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Default Progress on the 576

I've been building some adapters for my 576 -- here's the TO-3 -- I use a Amphenol mini-banana plug for the collector connection which fits snugly into the Keystone socket and makes good contact with the DUT:

Click the image to open in full size.

...and it's insulated too!
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Old 10th February 2010, 06:35 PM   #27
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I have a pair of 577's sitting here needing work. one of these days i will get to them.


Zc
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Old 10th February 2010, 10:50 PM   #28
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OK -- this one should do TO-3's, TO-247, TO-265 and TO-220:

Click the image to open in full size.
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Old 9th April 2010, 11:22 PM   #29
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Wow, I really should get me one. It matches great with my Tektronix scope from the early '60s.. Or was it mid '50s?
It's a RM-15, which is the same as the 545 (if I recall correctly). Those things are beautiful inside. A delay line of 30 cm long, probably all handmade. If I sold my house I might be able to afford one of those babys when they were new.
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Old 21st May 2012, 07:01 PM   #30
RNMarsh is offline RNMarsh  United States
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You can buy a new curve tracer made in China.. all ss and compact crt display; Brand is SMT MAX; model CA4810A. Got one new off the internet. But, it did cost more than 10-20 dollars.
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