Author Topic: Test Equipment Anonymous (TEA) group therapy thread  (Read 14549214 times)

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Offline mnementh

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #88150 on: April 15, 2021, 03:29:38 am »
 I had one of those baked spuds and some pork roast. Yumm.

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Offline Saskia

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #88151 on: April 15, 2021, 05:19:06 am »
@Cerebus congrats

*sigh* work ...

currently getting my fill of info during the Nvidia AI conference ...
shitloads of new frameworks to experiment with. Need to check if I can get those teslas replaced by A100s or so to start experimenting with BERT (Bidirectional Encoder Representations from Transformers) plus expectations are that we build up our own very specific MT training system where we build these models. Which means that this AI conference has about 20 - 30 hours of info for me to grok. mah head hurtz ...

currently fighting with Docker, Cuda, Linux on my notebook plus how to get an nvidia enabled cuda thingie to work on that stooopeeed locked down W10 notebook. FFS ...


 
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Offline capt bullshot

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #88152 on: April 15, 2021, 05:39:16 am »
Today arrival: some PCBs from jlcpcb (see the ad from above),

Now I'm awaiting some blinking blue LEDs and some 1206 resistors. 936 + 6 solder joints of joy per board.
Yeah, sometimes, life is good!  :-+  :-DD

Yeah, Blinkenlights:

I've built quite a few in the past:

http://wunderkis.de/Blinkenlights/blinkenlights.html
http://wunderkis.de/Blinkenlights/blinkedinger.html

Safety devices hinder evolution
 
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Online beanflying

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #88153 on: April 15, 2021, 06:52:44 am »
Time to open the Scotch bottle.

Doing battle with https://github.com/fra589/grbl-Mega-5X/wiki GRBL and pinmap comparisons between Duino/Clones/RAMPS/Old/New :palm:
I have however won the battle  :-+ UGS, Candle and Flatcam all in sync with Fusion 360/Eagle and my 3018 modding project.
Coffee, Food, R/C and electronics nerd in no particular order. Also CNC wannabe, 3D printer and Laser Cutter Junkie and just don't mention my TEA addiction....
 
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Offline BU508A

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #88154 on: April 15, 2021, 07:43:27 am »
Today arrival: some PCBs from jlcpcb (see the ad from above),

Now I'm awaiting some blinking blue LEDs and some 1206 resistors. 936 + 6 solder joints of joy per board.
Yeah, sometimes, life is good!  :-+  :-DD

Yeah, Blinkenlights:

I've built quite a few in the past:

http://wunderkis.de/Blinkenlights/blinkenlights.html
http://wunderkis.de/Blinkenlights/blinkedinger.html

Very nice!  :-+
I do like your perfboad constructions, reminds me about mine.  :-DD

Have you ever considered doing this blinky stuff in 3D?

“Chaos is found in greatest abundance wherever order is being sought. It always defeats order, because it is better organized.”            - Terry Pratchett -
 
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Offline capt bullshot

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #88155 on: April 15, 2021, 07:59:51 am »
Have you ever considered doing this blinky stuff in 3D?

Yes, but never built one.
Safety devices hinder evolution
 

Online Ice-Tea

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #88156 on: April 15, 2021, 09:19:03 am »
It was the radial cap. Which is odd, because it measured fine.

Guess I really have to get round to buying an ESR meter one of these days...
 
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Offline mansaxel

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #88157 on: April 15, 2021, 09:22:11 am »
It was the radial cap. Which is odd, because it measured fine.

Guess I really have to get round to buying an ESR meter one of these days...

The DE-5000 is a no-brainer. Really.

Online tggzzz

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #88158 on: April 15, 2021, 09:37:22 am »
It was the radial cap. Which is odd, because it measured fine.

Guess I really have to get round to buying an ESR meter one of these days...

If you would only use it occasionally, you could use a siggen, resistor and scope.

Apply a square wave amplitude dV to the C in series with R, and measure the voltage across the C. If the capacitor is perfect then the voltage across it will be the standard RC asymptotic exponential rise dV(1-e-t/RC). With a series resistor, you will see a step at t=0, followed by that standard rise. Assuming R>>RESR, initially current I through the capacitor is I=dV/R, and the size of the step is simply I*RESR.

Choose the frequency, dV and R to get a convenient step, and have a DC offset voltage if that is appropriate.

This technique has the advantage that it closely mimics the actual operation in an SMPS, which a generic ESR meter won't.
« Last Edit: April 15, 2021, 09:39:01 am by tggzzz »
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Offline BU508A

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Offline med6753

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #88160 on: April 15, 2021, 09:54:14 am »
Went to start the PSU re-cap of the Type 422 and hit a big snag. The parts list, schematic, and capacitors I ordered in no way match the physical PSU I have on the bench.  :wtf: After a bit of research discovered at a higher S/N Tek did a complete redesign of the PSU. The manual I have reflects that redesign. It took a bit of searching but I finally found a manual that matches this PSU. And yep, completely different.  :palm: So I had to generate a new BOM and submitted an order to Mouser. Get the proper capacitors next week.   
An old gray beard with an attitude.
 
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Offline BU508A

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #88161 on: April 15, 2021, 09:59:06 am »
Went to start the PSU re-cap of the Type 422 and hit a big snag. The parts list, schematic, and capacitors I ordered in no way match the physical PSU I have on the bench.  :wtf: After a bit of research discovered at a higher S/N Tek did a complete redesign of the PSU. The manual I have reflects that redesign. It took a bit of searching but I finally found a manual that matches this PSU. And yep, completely different.  :palm: So I had to generate a new BOM and submitted an order to Mouser. Get the proper capacitors next week.   

The fun never ends, does it?  :-DD
“Chaos is found in greatest abundance wherever order is being sought. It always defeats order, because it is better organized.”            - Terry Pratchett -
 

Offline med6753

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #88162 on: April 15, 2021, 10:14:43 am »
Went to start the PSU re-cap of the Type 422 and hit a big snag. The parts list, schematic, and capacitors I ordered in no way match the physical PSU I have on the bench.  :wtf: After a bit of research discovered at a higher S/N Tek did a complete redesign of the PSU. The manual I have reflects that redesign. It took a bit of searching but I finally found a manual that matches this PSU. And yep, completely different.  :palm: So I had to generate a new BOM and submitted an order to Mouser. Get the proper capacitors next week.   

The fun never ends, does it?  :-DD

It's my fault. Knowing that Tek is always upgrading equipment I should have checked the S/N range. I didn't so I need to kick my own arse.  :o
An old gray beard with an attitude.
 

Offline FransW

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #88163 on: April 15, 2021, 10:17:15 am »
Went to start the PSU re-cap of the Type 422 and hit a big snag. The parts list, schematic, and capacitors I ordered in no way match the physical PSU I have on the bench.  :wtf: After a bit of research discovered at a higher S/N Tek did a complete redesign of the PSU. The manual I have reflects that redesign. It took a bit of searching but I finally found a manual that matches this PSU. And yep, completely different.  :palm: So I had to generate a new BOM and submitted an order to Mouser. Get the proper capacitors next week.   

The fun never ends, does it?  :-DD

It needs three ingredients:
  An non re-capped TEK
  An industrial archeologist
  The right attitude
PE1CCN, Systems Engineering, HP, Philips, TEK, BRYMAN, Fluke, Keithley
 

Offline Saskia

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #88164 on: April 15, 2021, 10:18:30 am »
arse or ass ?
 
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Offline med6753

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #88165 on: April 15, 2021, 10:19:20 am »
An old gray beard with an attitude.
 
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Online Ice-Tea

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #88166 on: April 15, 2021, 10:24:06 am »
It was the radial cap. Which is odd, because it measured fine.

Guess I really have to get round to buying an ESR meter one of these days...

The DE-5000 is a no-brainer. Really.

On my shortlist. Together with the Peak.

I've done scope ESR measurements in the past. Rather prefer a slightly more "in your face" method ;)
 
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Offline McBryce

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #88167 on: April 15, 2021, 11:09:38 am »
It was the radial cap. Which is odd, because it measured fine.

Guess I really have to get round to buying an ESR meter one of these days...

The DE-5000 is a no-brainer. Really.

On my shortlist. Together with the Peak.

I've done scope ESR measurements in the past. Rather prefer a slightly more "in your face" method ;)

Second thumbs-up from me for the DE-5000. Best ESR meter I've owned.

McBryce.
30 Years making cars more difficult to repair.
 
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Offline Robert763

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #88168 on: April 15, 2021, 11:21:45 am »
It was the radial cap. Which is odd, because it measured fine.

Guess I really have to get round to buying an ESR meter one of these days...

The DE-5000 is a no-brainer. Really.

On my shortlist. Together with the Peak.

I've done scope ESR measurements in the past. Rather prefer a slightly more "in your face" method ;)

Second thumbs-up from me for the DE-5000. Best ESR meter I've owned.

McBryce.

The Peak kit is very nice and just works, not as capable all-round as the DE5000 but lower cost, small and automatic.
« Last Edit: April 15, 2021, 11:24:32 am by Robert763 »
 

Offline bd139

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #88169 on: April 15, 2021, 11:31:06 am »
Got to say that I like the peak stuff. It does indeed just work.

If they added ESR to the LCR45 rather than require a separate box I’d be happier though. You can approximate it with the complex measurement mode though with the device out of circuit.
 

Online beanflying

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #88170 on: April 15, 2021, 11:40:44 am »
Pointless TEA why does it exist at this price or even at all :-// eBay auction: #384097208731

Coffee, Food, R/C and electronics nerd in no particular order. Also CNC wannabe, 3D printer and Laser Cutter Junkie and just don't mention my TEA addiction....
 

Online Ice-Tea

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #88171 on: April 15, 2021, 11:42:44 am »
Bit of a bummer they don't offer the ESR70 with the DCA55 or so. Would be really nice...

Offline xrunner

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #88172 on: April 15, 2021, 11:45:38 am »
Pointless TEA why does it exist at this price or even at all :-// eBay auction: #384097208731

Because of the test leads!  :-DD
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Offline VK5RC

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #88173 on: April 15, 2021, 11:47:32 am »
That 'new' old style analogue meter, check out the poor moulding of the battery compartment in the pictures 😜, Bodgy Bob lives on.
The DER is very feature rich, but I am not a great fan of the lcd (on mine anyway) - always looks a bit smeary to me. But bang for buck is astronomical 👍
Whoah! Watch where that landed we might need it later.
 
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Offline bd139

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #88174 on: April 15, 2021, 11:57:52 am »
Fake AVO. What next?  :-DD

I’m not sure what the market for “I want an avo but I’m not paying that much” is like?!?!
 


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