Test Equipment Anonymous (TEA) group therapy thread

[mnementh]

 I had one of those baked spuds and some pork roast. Yumm.

mnem
 

[Saskia]

@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 ...

[capt bullshot]

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!   

Yeah, Blinkenlights:

I've built quite a few in the past:

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

[beanflying]

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
I have however won the battle  UGS, Candle and Flatcam all in sync with Fusion 360/Eagle and my 3018 modding project.

[BU508A]

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!   

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. 

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

[capt bullshot]

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

Yes, but never built one.

[Ice-Tea]

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...

[mansaxel]

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.

[tggzzz]

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>>R_ESR, initially current I through the capacitor is I=^dV/_R, and the size of the step is simply I*R_ESR.

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.

[BU508A]

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

Yes, but never built one.

https://de.aliexpress.com/item/32888551895.html

[med6753]

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.  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.  So I had to generate a new BOM and submitted an order to Mouser. Get the proper capacitors next week.   

[BU508A]

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.  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.  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? 

[med6753]

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.  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.  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? 

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. 

[FransW]

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.  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.  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? 

It needs three ingredients:
  An non re-capped TEK
  An industrial archeologist
  The right attitude

[Saskia]

arse or ass ?

[med6753]

arse or ass ?

Both. 

[Ice-Tea]

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

[McBryce]

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.

[Robert763]

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.

[bd139]

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.

[beanflying]

Pointless TEA why does it exist at this price or even at all eBay auction: #384097208731

[Ice-Tea]

Bit of a bummer they don't offer the ESR70 with the DCA55 or so. Would be really nice...

[xrunner]

Pointless TEA why does it exist at this price or even at all eBay auction: #384097208731

Because of the test leads! 

[VK5RC]

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 👍

[bd139]

Fake AVO. What next? 

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