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Old 13th October 2004, 12:02 PM   #1
tekman is offline tekman  Germany
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Default Hello from southwest Germany!

Hi,

I have been reading these threads for couple of years and now I finally registered. It has been wonderful reading these posts and I wanted to give my contribution.

I have always been addicted to music and I found the deeper end of the pool couple of years back while still studying. The keeper of local high end store showed me the way.

I am now Ph.D in physics and I have always been diy person at some level. My first serious diy project was a .. hard to mention, because I always work for it :-) . But besides the amp technology I was/am always intrested in the t&m and "practical little helpers for the electronics while diy".

I have designed own pcb for them and I'd like to share them some day (I have to find them first). I think some layouts are actually quite good, but that's only my opinion as you haven't seen them yet.

I'm now working as system administrator in a local company. Now I have more resources to make diy projects than before at school.

#end#
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Old 13th October 2004, 12:50 PM   #2
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Hi tekman, does your name refer to measurement equipment in some way?
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Old 13th October 2004, 01:01 PM   #3
SY is offline SY  United States
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And what kind of physics did you do?
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Old 13th October 2004, 01:12 PM   #4
tekman is offline tekman  Germany
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2 till: yep, it refers to a nice manufacturer of T&M equipment from Beaverton, Oregon, USA.

2 sy: I hope I used right time (apologies for my english otherwise, it's not mother's tongue), I DID surface analysis in physics, but not doing it anymore. Of course, we all must earn our living, so I had to find a work. That's the nowadays job in my posting mentioned.
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Old 13th October 2004, 01:37 PM   #5
SY is offline SY  United States
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Yes, I caught the past tense

ESCA, Auger, things like that?
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Old 14th October 2004, 06:06 AM   #6
tekman is offline tekman  Germany
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2 sy:

Yes, Auger (AES) and ESCA. Mostly Auger on stainless steel (Fe Cr x Mo y) alloys, main was studying pitting corrosion for a research project funded by "Deutsche Forschungsgemeinschaft". I don't remeber how many samples were prepared and how many spectrum I took :-) .Was a good time to do this, had a lot good collegues around. So we were really motivated, and enjoyed the days.
Not easy to find this nowadys in the work,but as I mentioned: earn the living :-)

So, have you been / are you working in a similar field - ESCA, AES, SIMS?
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Old 14th October 2004, 09:15 AM   #7
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Would you tell us a little more about your TEK equipment? I know you are not the only TEK aficionado on this board.
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Old 14th October 2004, 09:50 AM   #8
tekman is offline tekman  Germany
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Till,

well, you asked for it )

The range of scopes :
The lab ones: 7104 , 7904A, 5440. The portables: 465, 475, 485 (at least 2 each - in case of failure on late saturday nights ) )
The 2445/2465/2465B - same redundancy.
TDS 340A/ 380 in case digital storage is needed.
Tek 212 and 213 in case I am in holiday (rarely happens) and need a scope.

A little bit of TM 500 equipment like DM501, FG501/503, DC501/504, etc..
An AWG 420 in case sine/triangle/rectengular is not in my mood and we have to simulate

Of course all refurbished, cal'd, most with manuals.

Right now I refurbish one old Tek T935, may be you know these - the old "Electrolux vacuum cleaner" resembling ones in the plastic housing.
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Old 14th October 2004, 09:56 AM   #9
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Thats great, so i know whom to ask in case i start to reapair the readout of my 7904....

I have the 7904, a cheap 7313, and not enough plugins

7A16(A), 7A24, 7A12, 7A18, 7B53A, 7B80, 7D15
still looking for a high gain plugin.
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Old 14th October 2004, 10:05 AM   #10
tekman is offline tekman  Germany
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2 till:


shure, come bac kon me when you are willing to start the dive into your repair dungeon

Before it get's too offtopic here: Personal mail recommended in the case of deeper repair info.

The 7313 is not too bad, 65MHz is enough for most of the everyday work in my home lab.f
For the 7904:
I'd recommend sci.electronics.* via google - this topic is covered often.

Go for a 7A13 (newer version, the one with LED readout). Excellent CMRR, high gain, moderate in pricing (seen it for less than 50 euro). German army sold a lot of them last year, so there is god chance to look for auctions in the ebay

Avoid the older, mechanical scale 7A13 - not funny to repair and work with.

BTW: One never can have enough plug-ins for the Tektronix. Neither one can have enough probes ...
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