Author Topic: Test Equipment Anonymous (TEA) group therapy thread  (Read 1715645 times)

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Online med6753

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #35050 on: July 18, 2019, 03:07:30 am »
Looks great! I assume it passes all self tests and successfully boots?

BTW...did you ever work on the 485 that you got from the silent key in Vermont?
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Offline Kosmic

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #35051 on: July 18, 2019, 03:15:21 am »
Yes boot up and pass self-test multiple times. Will let it cook for the night.

The Tek 485 is still in the repair queue  :-\
 

Offline Kosmic

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #35052 on: July 18, 2019, 03:26:29 am »
These days I'm trying to get some traction on my own projects. Got 2 boards to design in Kicad, got to get used to Kicad first, then there the data logger app I'm trying to write. Logging data via GPIB to a csv file look simple but it's super hard to find a software that will do that for multiple instruments.

Got the logger part done I'm now working on the UI.
 

Online med6753

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #35053 on: July 18, 2019, 03:38:46 am »
I shy away from any sort of coding. It gives me headache AND an arse ache.  :o :-DD
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Offline bitseeker

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #35054 on: July 18, 2019, 03:47:46 am »
It's alive!  :-/O



I ended up locating the problem to R58. The pot responsible for -12V adjustment. It was probably full of electrolytic. Even though the board was immerged in IPA for 15min the potentiometer was somehow still dirty. It was making the -12V rail higher than usual and the overvoltage protection was kicking in.



I just cleaned r58 with Deoxit and then readjusted all the power rails correctly.

Excellent! Congrats, it's looking great. Now, what are you going to measure first?
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Offline bitseeker

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #35055 on: July 18, 2019, 03:57:14 am »
... then there the data logger app I'm trying to write. Logging data via GPIB to a csv file look simple but it's super hard to find a software that will do that for multiple instruments.

Got the logger part done I'm now working on the UI.

Yep, it's good to have your own code for logging. In addition to being able to support a variety of instruments, you can make them do other useful things such as display temperature, humidity and elapsed time.

« Last Edit: July 18, 2019, 04:08:17 am by bitseeker »
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Offline Kosmic

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #35056 on: July 18, 2019, 04:01:39 am »
Excellent! Congrats, it's looking great. Now, what are you going to measure first?

I'm working on 2 SA at the moment so I will probably use the 53310a to calibrate them.

I was also wondering how my gpsdo would compare to my rubidium standard. But I need to setup the GPS antenna outside first (I don't have a permanent setup).
 

Offline Kosmic

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #35057 on: July 18, 2019, 04:05:54 am »
... then there the data logger app I'm trying to write. Logging data via GPIB to a csv file look simple but it's super hard to find a software that will do that for multiple instruments.

Got the logger part done I'm now working on the UI.

Yep, it's good to have your own code for logging. In addition to being able to support a variety of instruments, you can make them do other useful things such as display temperature, humidity and elapsed time.

(Attachment Link)

Interesting usage of the string CMD  ^-^ On my side I normally output a empty str to emulate a screen off CMD.
 

Offline bitseeker

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #35058 on: July 18, 2019, 04:11:40 am »
Yeah, I don't display status permanently. Normally, the displays are off during logging, but I can hit a key to see status info.

Some instruments, like the HP DMMs, can turn their displays off. The funny thing is that the 34401A turns everything off whereas the 34410A keeps the "Remote" annunciator lit.
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Online kj7e

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #35059 on: July 18, 2019, 04:12:11 am »
@Kosmic,  what options does your 53310A have?  Just curious.
 

Offline Kosmic

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #35060 on: July 18, 2019, 04:16:04 am »
@Kosmic,  what options does your 53310A have?  Just curious.

Opt 1 (mem) and 30 (input c).
 
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Offline Brumby

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #35061 on: July 18, 2019, 07:17:32 am »
His stepson decided dealing with the gear was too much stress. A week ago he fired the auction house and sold everything in a 225 square foot garage  to a junk dealer for two or three hundred bucks. My friend described them tossing test equipment into the back of a dump truck.

Just makes me sad.

 :'(
 

Offline Ero-Shan

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #35062 on: July 18, 2019, 07:22:16 am »
A big shout out and thank you to Nixiefreqq.  :-+ :-+ Here it is. Fluke 7260A. I got so many goodies today I don't know what to do next.  :-DD

But anyway, at some point I'll do a tear down.


Boy, is that thing ugly!

But I certainly wouldn't say no to one.  ;)

You can be really grateful to Nixiefreqq Very generous. And don't forget the pictures!
 
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Online Mr. Scram

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #35063 on: July 18, 2019, 07:26:18 am »
Yeah, I don't display status permanently. Normally, the displays are off during logging, but I can hit a key to see status info.

Some instruments, like the HP DMMs, can turn their displays off. The funny thing is that the 34401A turns everything off whereas the 34410A keeps the "Remote" annunciator lit.
Doesn't it make more sense to display the data on the computer you're logging with? Or did you write a complete CLI with the DMMs being the display?  ;D
 

Offline beanflying

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #35064 on: July 18, 2019, 07:29:46 am »
A big shout out and thank you to Nixiefreqq.  :-+ :-+ Here it is. Fluke 7260A. I got so many goodies today I don't know what to do next.  :-DD

But anyway, at some point I'll do a tear down.


Boy, is that thing ugly!

But I certainly wouldn't say no to one.  ;)

You can be really grateful to Nixiefreqq Very generous. And don't forget the pictures!

He will need to be careful they mount each other and produce mega ugly babies  :-DD

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Online med6753

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #35065 on: July 18, 2019, 07:36:33 am »
A big shout out and thank you to Nixiefreqq.  :-+ :-+ Here it is. Fluke 7260A. I got so many goodies today I don't know what to do next.  :-DD

But anyway, at some point I'll do a tear down.


Boy, is that thing ugly!

But I certainly wouldn't say no to one.  ;)

You can be really grateful to Nixiefreqq Very generous. And don't forget the pictures!

He will need to be careful they mount each other and produce mega ugly babies  :-DD



Yes, certainly not what you would call good looking. And that stack is hideous.  :-DD Bd described it as looking like the Star Trek Shuttle ready to take off. Good analogy.

I'll do a tear down as soon as 2 things happen. First, I find a manual. So far no joy. 2nd, I can't figure out how to get the damn thing apart. I tried with no success. So hopefully once I source a manual it tells me how to get it apart.
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Online Cubdriver

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #35066 on: July 18, 2019, 08:07:40 am »
I'll do a tear down as soon as 2 things happen. First, I find a manual. So far no joy. 2nd, I can't figure out how to get the damn thing apart. I tried with no success. So hopefully once I source a manual it tells me how to get it apart.

See my sig.   >:D

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If it jams, force it.  If it breaks, you needed a new one anyway...
 

Online bd139

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #35067 on: July 18, 2019, 08:11:28 am »
it youtube and enter "pug orgy". That's what that stack looks like  :-DD
 
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Online med6753

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #35068 on: July 18, 2019, 08:19:20 am »
In the meantime....how about some Tek 485 porn?

What I found amazing is that this guy is packaged completely differently than it's siblings 465/475. Probably a safe assumption that it was a different design team with much different ideas on packaging. And having an early SMS supply vs the 465/475 linear supply probably also a factor.

I gave it a quick look over to see if there was anything obvious. Nothing so far. Even the fuse is OK. But it is deader than a door nail. The fan doesn't even come on. I got other projects ahead of this one so it will be a while before I get to it.






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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #35069 on: July 18, 2019, 08:33:20 am »
In the meantime....how about some Tek 485 porn?

Is that the delay line rolled around the CRT?
Keyboard error: Press F1 to continue.
 

Online bd139

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #35070 on: July 18, 2019, 08:33:27 am »
Nice pictures  :-+

Apparently the power supply is a dick on them so good luck.

In the meantime....how about some Tek 485 porn?

Is that the delay line rolled around the CRT?

That's the turbo encabulator that gets it up to 350 megs ;)
 

Online BU508A

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #35071 on: July 18, 2019, 08:41:27 am »



 :wtf: :wtf: :wtf:

-Pat

What is that Fluke in the middle of this mess, err, genius arrangement?
“Chaos is found in greatest abundance wherever order is being sought. It always defeats order, because it is better organized.”            - Terry Pratchett -
 

Online med6753

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #35072 on: July 18, 2019, 08:49:17 am »
In the meantime....how about some Tek 485 porn?

Is that the delay line rolled around the CRT?

Don't listen to bd139.  :-DD The correct answer is yes.
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Online bd139

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #35073 on: July 18, 2019, 09:20:04 am »
 >:D
 

Online Mr. Scram

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #35074 on: July 18, 2019, 09:48:26 am »
Don't listen to the Tek murderer. He lies!
 


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