Author Topic: Test Equipment Anonymous (TEA) group therapy thread  (Read 2012894 times)

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Online med6753

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #16650 on: September 21, 2018, 01:41:32 pm »
I don't buy them for resale unless I'm going to snag at least 3x what I paid for them. Preferably 5x (done that a couple of times  :-DD ). Sometimes you get a PITA or a lemon. I've got one on my hands now.

Welcome to the bastard 465 club. Mine is sitting in a closet never to see the light of day again.
An old gray beard with an attitude.
 

Offline bd139

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #16651 on: September 21, 2018, 01:48:12 pm »
Indeed. On mine it looks like I'm going to have to pull the entire attenuator board out again  :'(

I'm hoping another better one comes along so I can use it as a parts mule  :-DD
 

Offline Mr. Scram

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #16652 on: September 21, 2018, 02:17:22 pm »
arrg. You bastard. You just HAD to post that link.  |O Here I was just sipping my coffee, blissfully ignorant...

Now I have a whole morning's reading to do before I continue with my testing; and it looks like I need to buy some caps that I can find datasheets for to do testing. And now I HAVE to find my battery for my AD584LH board and check my 189 BEFORE I do that vref adj. 

Welcome to my shitlist, beeyotch. ;)

mnem
"May the fleas of a thousand camels infest your balls, and your arms too short to reach." ~ prehistoric Arab curse
I guess I'm not at my sharpest today. What are you going to do?
 

Online med6753

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #16653 on: September 21, 2018, 02:31:42 pm »
Re-capped the PSU on the Fluke 8050A. No drama here. It worked fine before and after the re-cap. There are a few tants tucked up under that main board but I really don't want to pull those boards apart unless I'm forced to.

I also realized that the Fluke 8010A has had some tants replaced but the not the PSU caps. That's in que to get done but I have some other things I want to work on first.

An old gray beard with an attitude.
 

Online mnementh

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #16654 on: September 21, 2018, 02:40:48 pm »
I assumed that you had seen those threads already  :popcorn:

I thought I had read all the relevant threads too...  :palm: There's just a SEA of content on this thing now; it's like trying to sip from a firehose.  |O

arrg. You bastard. You just HAD to post that link.  |O Here I was just sipping my coffee, blissfully ignorant...

Now I have a whole morning's reading to do before I continue with my testing; and it looks like I need to buy some caps that I can find datasheets for to do testing. And now I HAVE to find my battery for my AD584LH board and check my 189 BEFORE I do that vref adj. 

Welcome to my shitlist, beeyotch. ;)

mnem
"May the fleas of a thousand camels infest your balls, and your arms too short to reach." ~ prehistoric Arab curse
I guess I'm not at my sharpest today. What are you going to do?

I was planning to do very little except drink coffee and try not to lose my mind, being I'm sick as the proverbial dog today. Then BravoV posted a link to a thread... that had links to several threads... and then I got sucked down the rabbit-hole.  :palm:

mnem
« Last Edit: September 21, 2018, 02:44:04 pm by mnementh »
 

Offline Mr. Scram

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #16655 on: September 21, 2018, 02:45:56 pm »
I was planning to do very little except drink coffee and try not to lose my mind, being I'm sick as the proverbial dog today. Then BravoV posted a link to a thread... that had links to several threads... and then I got sucked down the rabbit-hole.

mnem
What's this about a vref adjustment then?

I've been eyeing the DE-5000 for a while, but have to admit the missing components are turning me off. I want solid kit, not the adequate kit Cerebus mentioned.
 

Online med6753

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #16656 on: September 21, 2018, 02:46:04 pm »


I was planning to do very little except drink coffee and try not to lose my mind, being I'm sick as the proverbial dog today. Then BravoV posted a link to a thread... that had links to several threads... and then I got sucked down the rabbit-hole.

mnem


Get better quick. Earlier this week I had a pinched nerve in my right shoulder and it hurt like hell. Much better now with just a slight discomfort.
An old gray beard with an attitude.
 

Offline Specmaster

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #16657 on: September 21, 2018, 02:50:19 pm »

Get better quick. Earlier this week I had a pinched nerve in my right shoulder and it hurt like hell. Much better now with just a slight discomfort.
That was the tants trying to fight back against annihilation  :-DD
Who let Murphy in?
 

Offline neo

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #16658 on: September 21, 2018, 02:51:16 pm »
I was planning to do very little except drink coffee and try not to lose my mind, being I'm sick as the proverbial dog today. Then BravoV posted a link to a thread... that had links to several threads... and then I got sucked down the rabbit-hole.  :palm:

mnem


Hey! The matrix stuff is my shtick!  :-DD

Get better soon though, hate feeling that way myself. Once got so sick with the flu i stopped eating for two weeks, that was the worst.  :o
A hopeless addict (and slave) to TEA and a firm believer that high frequency is little more than modern hoodoo.
 

Online med6753

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #16659 on: September 21, 2018, 02:53:51 pm »

Get better quick. Earlier this week I had a pinched nerve in my right shoulder and it hurt like hell. Much better now with just a slight discomfort.
That was the tants trying to fight back against annihilation  :-DD

Well, they lost. I AM THE TANT KILLER :-DD :-DD :-+
An old gray beard with an attitude.
 

Offline Specmaster

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #16660 on: September 21, 2018, 03:18:52 pm »
Not until you take them outside and WILDIZE them
Who let Murphy in?
 

Online PA0PBZ

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #16661 on: September 21, 2018, 03:22:05 pm »
The tant on the far left leaked electrolyte when I laid it on the bench!

Wait… What?  :o
Keyboard error: Press F1 to continue.
 

Offline Specmaster

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #16662 on: September 21, 2018, 03:23:42 pm »
A wet tant eh?
Who let Murphy in?
 

Online PA0PBZ

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #16663 on: September 21, 2018, 03:41:23 pm »
A wet tant eh?

Sure, but they don't look like that - ever.
Keyboard error: Press F1 to continue.
 

Online mnementh

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #16664 on: September 21, 2018, 04:04:04 pm »
I was planning to do very little except drink coffee and try not to lose my mind, being I'm sick as the proverbial dog today. Then BravoV posted a link to a thread... that had links to several threads... and then I got sucked down the rabbit-hole.  :palm:

mnem


Hey! The matrix stuff is my shtick!  :-DD

Get better soon though, hate feeling that way myself. Once got so sick with the flu i stopped eating for two weeks, that was the worst.  :o


 Dude... don't be so possessive. ;)

I was into The Matrix before www.whatisthematrix.com. When it was still a B&W manga by Geoff Darrow and Neil Gaiman, with a MUCH less hopeful outlook. The Wachowskis and their empire have successfully retconned the internet for the most part, but I LIVED through the thing from beginning to end; WB published the website on my birthday in 1998 with the entire comic, but I'd already found bits & pieces elsewhere and was hungry for more. I printed every single page one by one over a dialup connection so I could share it with my friends; you wanna talk dedication? Puh-leeeze.  :P

mnem
Twenty. Fucking. Years.  :palm:
« Last Edit: September 21, 2018, 04:14:15 pm by mnementh »
 

Online med6753

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #16665 on: September 21, 2018, 04:16:41 pm »
The tant on the far left leaked electrolyte when I laid it on the bench!

Wait… What?  :o
 
I kid you not and it surprised me. I thought those beaded tants were dry and solid. It felt slimy when I put it down and the area around it became wet for several minutes then evaporated. If you blow up that picture you will see the stain it left on the poster board. 

Edit...full size  2nd edit....there also appears to be a crack in it. I already tossed it so I can't confirm.
« Last Edit: September 21, 2018, 04:23:57 pm by med6753 »
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Offline Mr. Scram

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #16666 on: September 21, 2018, 04:19:24 pm »
Dude... don't be so possessive. ;)

I was into The Matrix before www.whatisthematrix.com. When it was still a B&W manga by Geoff Darrow and Neil Gaiman, with a MUCH less hopeful outlook. The Wachowskis and their empire have successfully retconned the internet for the most part, but I LIVED through the thing from beginning to end; WB published the website on my birthday in 1998 with the entire comic, but I'd already found bits & pieces elsewhere and was hungry for more. I printed every single page one by one over a dialup connection so I could share it with my friends; you wanna talk dedication? Puh-leeeze.  :P

mnem
Twenty. Fucking. Years.  :palm:
Y'all a bunch of hipsters. ;D
 

Offline Specmaster

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #16667 on: September 21, 2018, 04:26:39 pm »
A wet tant eh?

Sure, but they don't look like that - ever.
It was the thought of was to come that made it wet itself  :-DD
Who let Murphy in?
 

Offline tggzzz

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #16668 on: September 21, 2018, 04:29:30 pm »
TEA time, in multiple senses.

I've been looking for a Power Designs 2020 for a little while. The brushed ali front panel looks so pornographic, and the thought of being able to set a low noise PSU in 1mV steps is too much to resist. Proper knobs and digital - what more could I possibly want?

The first picture shows the fleabay advert. Knobs missing and a bit suspicious that only the front panel is shown, but at least the voltmeter matches the dials. Bought it for £8 (+£50 P&GSP :( ), about the same as they cost here unpowered up.

The second picture shows it as it arrived. Not surprised about the case :) Checked it was working using a variac set to 115V. (Me a pessimist?)

Rewired it for 240V; back to the "good" old days of unsoldering/resoldering transformer primary windings.
Tweaked the internal zero/cal trimpots. Well, I say trimpots, but they are mounted on the case and have locknuts :) Well, what else would you use with an LM399 voltage reference?
Everything works beautifully, and it is certainly accurate enough to calibrate 3.5 digit DVMs.

The final picture shows it after tarting up with car spray and a couple of knobs I've had lying around since the 80s. I will deem it evidence that hoarding is worthwhile, cough.

Well satisfied. Now there's absolutely no reason to keep the Farnell, just in case.

EDIT: forgot to point out that the indicators are neons (not LEDs), and they flash to indicate an overload. There's something homely about neons.

Although you can dial up voltages in 1mV steps, the 1mV vernier pot allows voltages to be tweaked to microvolt levels. Once set at, say 100mV, the value stays rock solid at 0.100000V, as measured on an HP DVM with 1uV resolution. In contrast, eyeballing my Tenma PSU gives 50uVpp variations.

There's somethiing just right about these PSUs; definitely a keeper.
« Last Edit: September 21, 2018, 10:37:51 pm by tggzzz »
There are lies, damned lies, statistics - and ADC/DAC specs.
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Offline Specmaster

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #16669 on: September 21, 2018, 04:33:50 pm »
That looks really good and those knobs look like they belong there in the first place.
Who let Murphy in?
 

Offline bd139

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #16670 on: September 21, 2018, 04:34:43 pm »
Indeed. Nice job  :-+
 

Online med6753

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #16671 on: September 21, 2018, 04:44:40 pm »
Agreed...sexy!  :-+
An old gray beard with an attitude.
 

Offline Cerebus

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #16672 on: September 21, 2018, 04:51:38 pm »
I slew the beast.  >:D

They stab it their steely knives,
But they just can't kill the beast...

[Duet: two tortured, distorted souls in Am]
Anybody got a syringe I can use to squeeze the magic smoke back into this?
 

Offline Cerebus

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #16673 on: September 21, 2018, 04:54:53 pm »
arrg. You bastard. You just HAD to post that link.  |O Here I was just sipping my coffee, blissfully ignorant...

Now I have a whole morning's reading to do before I continue with my testing; and it looks like I need to buy some caps that I can find datasheets for to do testing. And now I HAVE to find my battery for my AD584LH board and check my 189 BEFORE I do that vref adj. 

Welcome to my shitlist, beeyotch. ;)

mnem
"May the fleas of a thousand camels infest your balls, and your arms too short to reach." ~ prehistoric Arab curse
I guess I'm not at my sharpest today. What are you going to do?

A lot of camel grooming?
Anybody got a syringe I can use to squeeze the magic smoke back into this?
 

Online med6753

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #16674 on: September 21, 2018, 04:55:06 pm »
BTW...you Brits keep using the term "fortnight" and I had no idea what length of time it was. Google is your friend. 2 weeks.
An old gray beard with an attitude.
 


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