Author Topic: Test Equipment Anonymous (TEA) group therapy thread  (Read 3001356 times)

0culus, exor, VK5RC, TorinoFermic, xrunner and 16 Guests are viewing this topic.

Offline bd139

  • Super Contributor
  • ***
  • Posts: 14925
  • Country: gb
Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #54475 on: April 03, 2020, 03:37:13 pm »
The lego motors of my era were quite robust in that respect. I refer to these ones:



I managed to use two isolated model railway controllers in series to get around 25V out. It was quite happy for a while just made screaming noises! Not bad for 4.5V rated  :-DD. They did lose a bit of torque once you'd done that, I assume due to the molten things that remained where the brushes were.  :-DD
 
The following users thanked this post: AVGresponding

Online mnementh

  • Super Contributor
  • ***
  • Posts: 7643
  • Country: ca
  • *Escaping The Suck*
Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #54476 on: April 03, 2020, 04:08:53 pm »
Here's version two of my DER expansion after all modifications were made, the part needs just minor sanding after printing. In black this time, because that looks sexier (and @mnementh, the carbon used to make PLA black will add additional screening from the ether, sunspots and the gravitational pull of Mars :) ).

@worsthorse: Attached are the three models (in TL-24.zip), Type-A is a blank case with no holes to make your own type, Type-B has the 4 BNC sockets with anti-rotation feature and the Lid file fits on both versions. I would advise others to add some support blockers to minimise the supports to the centre of the model, otherwise it's quite a bit of work to remove the support frame from within the box. On an Ender 3 Pro at 0,2mm the main case takes about 4.5 Hours, the lid takes just over an hour to make.

McBryce.
A delightful level of overkill which of course we know there is no such thing as we are here after all with far to much gear for the job at hand ;)

Agreed! Well-done; great follow-through. We all eagerly await your empirical testing.  :-+

I really am surprised you didn't bring the BNCs out the sides; this would naturally segregate the leads by connection and not make the leads kink against the benchtop when you have the meter upright on its bail. That is what I had in mind with my own PCB design scribbled on a napkin here somewhere; the layout of the connections to the sockets tends to lend itself to this configuration as well. :-//

mnem
 :-DMM
 

Online mnementh

  • Super Contributor
  • ***
  • Posts: 7643
  • Country: ca
  • *Escaping The Suck*
Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #54477 on: April 03, 2020, 04:16:32 pm »
It is not only about nationalities. It depends also on the people involved as well.
I know people which cannot understand sarcasm. For me as person which likes
to be sarcastic (or ironic) is it hard to supress a sarcastic (ironic) comment.
I caused this way in the past lots of heated arguments.  :(

Now, I've never detected a note of sarcasm in anything you say, not at all, not once. You use sarcasm almost as rarely as I do.

Well. Since I am not a native English speaker, I'm very cautious about using sarcasm. In this medium here (forum) the non-verbal channel is missing. It is much easier e.g. on the TEA discord sessions. And another point is: I know most people here only from what they are writing, some from discord and very rare face-to-face. Same goes the other way around. The people here just see only a very little piece of my personality.

As I am a really big fan of irony and sarcasm ( moi...? ), (it is pretty much how I talk all the time) I've adopted the generally accepted internet etiquette of using some form of highlighting ("quotes", bolding, larger font) and/or emojis to make it clear that one should consider a specific phrase as being an ironic statement. This CAN be difficult at times, which is why you sometimes see me use multiple colors to identify different trains of thought in an (often poorly executed) attempt to keep such in order. Unfortunately, this rubs some folks the wrong way as well.

OFW; I take what I consider to be reasonable care not to be too offensive. If the worst that happens to you in a day is you have to deal with some local color, you've had a damn fine day.  ;)

The bold and blue font I use because I like the color and it's easier for me to read. I did switch to Navy instead of Primary blue in response to complaints that all the colors made it look like Walt Disney threw up in here. ;)


mnem
Sarchasm: The enormous gulf between your eloquent, pithy remark and the daft git who just doesn't get it.

 
The following users thanked this post: BU508A, Mortymore, bd139

Online Cerebus

  • Super Contributor
  • ***
  • Posts: 4860
  • Country: gb
Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #54478 on: April 03, 2020, 04:36:41 pm »
The bold and blue font I use because I like the color and it's easier for me to read.

He means he doesn't have to move his lips quite as much when it looks like it's written in crayon.
[Fx: ducks]
Anybody got a syringe I can use to squeeze the magic smoke back into this?
 
The following users thanked this post: mnementh, Mr. Scram, Mortymore, bd139

Offline Mr. Scram

  • Super Contributor
  • ***
  • Posts: 9250
  • Country: 00
  • Display aficionado
Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #54479 on: April 03, 2020, 05:20:38 pm »
You've definitely got a wooden ear for humour when the comedy fx aren't present, only implied. Try this:

"[Fx: mocking baby talk voice used for comic effect] Awwww, poor widdle dwagon. Don't be mean to him. "

Better? I can see that I'm going to have to telegraph the joke in future if I want you to get it, which I hate having to do.
That's what I get when I attempt to be sociable and well adjusted. No more, I say! Or that's what we get when you attempt to be funny. Pick your poison.  ;D
 

Offline GreyWoolfe

  • Super Contributor
  • ***
  • Posts: 3409
  • Country: us
  • NW0LF
Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #54480 on: April 03, 2020, 05:21:16 pm »
Venturing into 6.5 digit territory wasn't too painful after all.   :-DD

Pack extra carrots for your slide down the rabbit hole.  Don't forget a sack to sit on to keep your butt clean as you slide. |O
"Heaven has been described as the place that once you get there all the dogs you ever loved run up to greet you."
 

Offline McBryce

  • Super Contributor
  • ***
  • Posts: 1633
  • Country: de
Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #54481 on: April 03, 2020, 05:31:52 pm »
It is not only about nationalities. It depends also on the people involved as well.
I know people which cannot understand sarcasm. For me as person which likes
to be sarcastic (or ironic) is it hard to supress a sarcastic (ironic) comment.
I caused this way in the past lots of heated arguments.  :(

I have found British and German humour to share quite a bit of common ground; we even stole one of your words for it, "schadenfreude" (I only admit to enjoying it for comic effect   :-DD ).

One stolen word? What about Kindergarten, Zeitgeist, Über.... and so many more.


Agreed! Well-done; great follow-through. We all eagerly await your empirical testing.  :-+

I really am surprised you didn't bring the BNCs out the sides; this would naturally segregate the leads by connection and not make the leads kink against the benchtop when you have the meter upright on its bail. That is what I had in mind with my own PCB design scribbled on a napkin here somewhere; the layout of the connections to the sockets tends to lend itself to this configuration as well. :-//

mnem
 :-DMM

I had a model made up with the connectors going out the sides, but it just looked so wrong I couldn't do it. Even if you don't want to make a 4x BNC version, the Type-A Model is a blank box to recreate any connection to the DER EE that you want, so I'm sure that will be useful to someone and my entire work wasn't in vain.

McBryce.

« Last Edit: April 03, 2020, 05:35:32 pm by McBryce »
 
The following users thanked this post: mnementh

Online mnementh

  • Super Contributor
  • ***
  • Posts: 7643
  • Country: ca
  • *Escaping The Suck*
Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #54482 on: April 03, 2020, 05:37:27 pm »
Don't be mean to him. If he'd bought something that 'just worked' he wouldn't have had to do any tinkering.
If he didn't have any tinkering to do he wouldn't be happy.
If he wasn't off happily tinkering with that printer he'd be getting under our feet.
Therefore the 'cheap' printer was a good thing - Q.E.D.

He's a right little tinker that dragon.
I wasn't trying to be mean. I was just wondering what the score was at this point. I think mnem knew full well he was going into a project and not necessarily going for value for money or ease.

You're both right. On all counts.

I love for CERTAIN THINGS to "just work". My daily driver phone, car, laptop, tablet PCs. Most cases, my sound & video equipment, though I DO love resurrecting and modding good, old examples of all of the above, as a "toy" or a project, NOT the one I use everyday.

Scram, I actually figured you were deliberately giving me an excuse to post the list I'd just made for myself...  :-DD I took it at absolute face value; I've been here long enough that I know you don't necessarily look at any single thing the same as others do. ;)

Right now I'm happily trying to combobulate myself a convenient means of connecting all the wires on the hotend; not a big fan of the small plug ends CReality uses on the heater cartridge.


mnem
*obligatory soggy ol' boot tossed in Cerebus' general direction* :-/O
« Last Edit: April 03, 2020, 05:40:02 pm by mnementh »
 

Online mnementh

  • Super Contributor
  • ***
  • Posts: 7643
  • Country: ca
  • *Escaping The Suck*
Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #54483 on: April 03, 2020, 05:44:22 pm »
You've definitely got a wooden ear for humour when the comedy fx aren't present, only implied. Try this:

"[Fx: mocking baby talk voice used for comic effect] Awwww, poor widdle dwagon. Don't be mean to him. "

Better? I can see that I'm going to have to telegraph the joke in future if I want you to get it, which I hate having to do.
That's what I get when I attempt to be sociable and well adjusted. No more, I say! Or that's what we get when you attempt to be funny. Pick your poison.  ;D

Normal is as normal does.    >:D

mnem
"You laugh at me because I'm different; I laugh at you because you're all the same."
 
The following users thanked this post: Mortymore

Offline Mr. Scram

  • Super Contributor
  • ***
  • Posts: 9250
  • Country: 00
  • Display aficionado
Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #54484 on: April 03, 2020, 05:51:58 pm »
You're both right. On all counts.

I love for CERTAIN THINGS to "just work". My daily driver phone, car, laptop, tablet PCs. Most cases, my sound & video equipment, though I DO love resurrecting and modding good, old examples of all of the above, as a "toy" or a project, NOT the one I use everyday.

Scram, I actually figured you were deliberately giving me an excuse to post the list I'd just made for myself...  :-DD I took it at absolute face value; I've been here long enough that I know you don't necessarily look at any single thing the same as others do. ;)

Right now I'm happily trying to combobulate myself a convenient means of connecting all the wires on the hotend; not a big fan of the small plug ends CReality uses on the heater cartridge.[/b][/i][/color]

mnem
*obligatory soggy ol' boot tossed in Cerebus' general direction* :-/O
Next thing you're going to tell me is that learning how to tie your shoe laces at age 12 isn't impressive or something.
 

Online mnementh

  • Super Contributor
  • ***
  • Posts: 7643
  • Country: ca
  • *Escaping The Suck*
Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #54485 on: April 03, 2020, 05:52:22 pm »

   Capacitive, inductive, HF, LF, common-mode noise & even sunspot interactions will all affect you when you're down around the 1-100 puff range, right where the laboratory-level accuracy you're shooting for will be most important; the longer the leads the bigger the antenna, the greater the chance for the aether to fuck with your head.  ;)

But you're a lot more of a voltnut than I am; you know this better than me. I applaud you in your experimentative nature...  :clap:   

mnem
*tinker-tinker... putter-putter...*

Meeee???? A voltnut? The most accurate meter I own is a Keithley 2000 and it rounds every result down to the nearest 6.5 Digits! That's like just guessing what the voltage is!

McBryce.

 :-DD

I knew you'd get a chuckle out of that.  :-+

mnem
*waves from  the voltmutt side of the rabbit-hole*
« Last Edit: April 03, 2020, 05:59:50 pm by mnementh »
 

Offline Ero-Shan

  • Frequent Contributor
  • **
  • Posts: 450
  • Country: de
Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #54486 on: April 03, 2020, 05:53:50 pm »
Since replacing my old workbench, I didn't any longer have the the inrush-current limited extra outlet for my Philips variable isolation transformer. I wanted to use a Grundig (yes, Grundig, me!) one in a more practical housing, but that lacked a few features. So I ordered one of those combo meters, which arrived a week ago.

So, today's project: Replace the moving pointer voltmeter by a combined volt/amps meter. Clean up the very dusty inside, add an inrush current limiter, tighten the loose screws on the transformer.

Mostly (dirty) mechanical work, fastening the cap rail for the meter turned out to be quite a task.

Eventually it was finished. Yes this took most of the day! Still not the most beautiful, but it does its job.



At last I have that important piece of gear ready to use again.
 
The following users thanked this post: edavid, BU508A, med6753, mnementh, Mortymore, FransW, grizewald

Online mnementh

  • Super Contributor
  • ***
  • Posts: 7643
  • Country: ca
  • *Escaping The Suck*
Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #54487 on: April 03, 2020, 05:56:10 pm »
@ero-shan: Nice, tidy work. No sense in trying to buy new with those features; much better to update old gear that is better-made to begin with. :-+


You're both right. On all counts.

I love for CERTAIN THINGS to "just work". My daily driver phone, car, laptop, tablet PCs. Most cases, my sound & video equipment, though I DO love resurrecting and modding good, old examples of all of the above, as a "toy" or a project, NOT the one I use everyday.

Scram, I actually figured you were deliberately giving me an excuse to post the list I'd just made for myself...  :-DD I took it at absolute face value; I've been here long enough that I know you don't necessarily look at any single thing the same as others do. ;)

Right now I'm happily trying to combobulate myself a convenient means of connecting all the wires on the hotend; not a big fan of the small plug ends CReality uses on the heater cartridge.[/b][/i][/color]

mnem
*obligatory soggy ol' boot tossed in Cerebus' general direction* :-/O
Next thing you're going to tell me is that learning how to tie your shoe laces at age 12 isn't impressive or something.

*looks down at the loafers on his feet, then across the room at his Velcro-trussed sneakers* :o

mnem
no comment. ;D
« Last Edit: April 03, 2020, 06:03:46 pm by mnementh »
 

Offline mansaxel

  • Frequent Contributor
  • **
  • Posts: 596
  • Country: se
  • SA0XLR
    • My very static home page
Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #54488 on: April 03, 2020, 06:03:59 pm »

Looking on eBay now hahaha  :-DD. Looks like some of the cheaper insulation testers may do the job but 2kv would be nice.

I'm doing it the hard way, with a Wee Megger. So much up-fuckery crammed into that little bakelite shell, with a stiff-upper-lip disregard for any security standards.  I love it. A very useful tool, next to the Safebloc.


Offline bd139

  • Super Contributor
  • ***
  • Posts: 14925
  • Country: gb
Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #54489 on: April 03, 2020, 06:52:28 pm »
I've got a slightly newer Cliff quicktest somewhere. I think I've only used it a few times as I rarely do anything mains side that isn't dead simple or encapsulated. So much so I actually got rid of my scariac and isolation transformer a couple of years back now.

As for megger, yeah something like that would do the job. I did notice the Chinese have come up with some options in the £30 bracket though which are interesting. Good to 1KV which is fine for giving the odd hooky looking transformer a poke before you kill yourself with it.
 

Offline Saskia

  • Frequent Contributor
  • **
  • Posts: 591
  • Country: de
  • you unlock this door with the key of imagination
Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #54490 on: April 03, 2020, 07:11:30 pm »
*clonk* *clonk* *hammer* *disinfect*

an old AMD with an M68 board, an IDE hard drive and some RAM. Freshly installed Windows XP.
*curse* *cuss* for activation via the phone and hacking in gazillion numbers long lines in the f-ing phone and then the bloody computer.

But it boots, it is activated, and now I am trying to run that Willem Gizmo. As soon as I have the proper cable, all the ones I had have evaporated even though I did not shine at them with my class 4 flashlight.

And the software starts.
« Last Edit: April 03, 2020, 07:24:20 pm by Saskia »
 
The following users thanked this post: mnementh

Online Cerebus

  • Super Contributor
  • ***
  • Posts: 4860
  • Country: gb
Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #54491 on: April 03, 2020, 07:15:00 pm »
I've got a slightly newer Cliff quicktest somewhere.

Those used to be de rigueur when many things came with an attached mains lead and no plug. Now that things have removable mains cords and the cords all come with moulded plugs I don't think I've had a call to use one more than once in the last 15-20 years.
Anybody got a syringe I can use to squeeze the magic smoke back into this?
 

Online tautech

  • Super Contributor
  • ***
  • Posts: 18372
  • Country: nz
  • Taupaki Technologies Ltd. NZ Siglent Distributor
    • Taupaki Technologies Ltd.
Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #54492 on: April 03, 2020, 07:27:04 pm »
The bold and blue font I use because I like the color and it's easier for me to read. I did switch to Navy instead of Primary blue in response to complaints that all the colors made it look like Walt Disney threw up in here. ;)

mnem
Sarchasm: The enormous gulf between your eloquent, pithy remark and the daft git who just doesn't get it.
Nah, it's just a feeble attempt at not falling into the gulf of Med's blue haze.  :P

Dig those claws in memn and resist.....if you can.  :-DD
Avid Rabid Hobbyist
 
The following users thanked this post: mnementh

Offline bd139

  • Super Contributor
  • ***
  • Posts: 14925
  • Country: gb
Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #54493 on: April 03, 2020, 07:34:36 pm »
I've got a slightly newer Cliff quicktest somewhere.

Those used to be de rigueur when many things came with an attached mains lead and no plug. Now that things have removable mains cords and the cords all come with moulded plugs I don't think I've had a call to use one more than once in the last 15-20 years.

Yes similar here. I was just looking at how much I can palm it off on eBay for  :-DD

Really these days the only flying leads mains things I use are meanwell power supplies and as lame as it is I tend to just chop the end off an IEC lead, put some spades on it, making a nice suicide lead, and screw those down on the power supply. Job done.  :-//

If there’s a touch hazard it goes in one of the numerous enclosures I have lying around.
 

Offline med6753

  • Super Contributor
  • ***
  • Posts: 6024
  • Country: us
  • Tek nut
Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #54494 on: April 03, 2020, 08:44:06 pm »
The bold and blue font I use because I like the color and it's easier for me to read. I did switch to Navy instead of Primary blue in response to complaints that all the colors made it look like Walt Disney threw up in here. ;)

mnem
Sarchasm: The enormous gulf between your eloquent, pithy remark and the daft git who just doesn't get it.
Nah, it's just a feeble attempt at not falling into the gulf of Med's blue haze.  :P

Dig those claws in memn and resist.....if you can.  :-DD

Ahem.....keep me out of this discussion.  :o :o ;D


sarcasm is my middle name
An old gray beard with an attitude.
 

Offline Mr. Scram

  • Super Contributor
  • ***
  • Posts: 9250
  • Country: 00
  • Display aficionado
Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #54495 on: April 03, 2020, 08:47:20 pm »
Those used to be de rigueur when many things came with an attached mains lead and no plug. Now that things have removable mains cords and the cords all come with moulded plugs I don't think I've had a call to use one more than once in the last 15-20 years.
Haha, that's hilarious!  :-DD
 

Online 0culus

  • Super Contributor
  • ***
  • Posts: 2210
  • Country: us
  • Electronics, RF, and TEA Hobbyist
Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #54496 on: April 03, 2020, 09:00:30 pm »
Earlier this week, I got a nifty little package, containing a very nice condition 4332A LCR meter. This is a Yokogawa product like most (all?) HP LCR meters. Unfortunately, it wasn't working. The most obvious thing was a cremated 100 ohm resistor on the A4 board. This probably resulted from someone applying a too-large signal to the guard terminal. Replaced that, but still no go. The oscillator (which also didn't work at some range settings) was stuck at 12.3 KHz rather than switching between 1 KHz and 100 KHz depending on range. After much troubleshooting (with help from a kind person on the HPAK list), I by chance unsoldered A1Q1 (an P-channel FET) to test it out of circuit, which didn't go anywhere. I soldered it back in....and it was working now? Looks like either a cold solder joint or (hopefully not) an intermittent lead on A1Q1.

Anyway, I aligned the meter movement, and it seems to be working now.  :-+

Note -hp- calculator porn in photo, placed carefully for @nixiefreqq.  >:D
 
The following users thanked this post: edavid, Cubdriver, med6753, mnementh, Mortymore, bd139, factory, mansaxel, grizewald, Kosmic

Online 0culus

  • Super Contributor
  • ***
  • Posts: 2210
  • Country: us
  • Electronics, RF, and TEA Hobbyist
Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #54497 on: April 03, 2020, 09:08:11 pm »
More pics, including the charcoal resistor. It's also full of metal can pack Fairchild ICs.
« Last Edit: April 03, 2020, 09:09:43 pm by 0culus »
 
The following users thanked this post: Cubdriver, mnementh, bd139, factory, grizewald, Kosmic

Offline bd139

  • Super Contributor
  • ***
  • Posts: 14925
  • Country: gb
Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #54498 on: April 03, 2020, 09:23:28 pm »
Been after one of them for a few years. Thanks for the mini tear down  :-+
 

Offline Cubdriver

  • Supporter
  • ****
  • Posts: 2872
  • Country: us
  • Nixie addict
    • Photos of electronic gear
Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #54499 on: April 03, 2020, 09:29:53 pm »
Nice, Sean - glad to see it's working again.  I'd been following the thread on the HPAK list; it's nice to see some pics of it.  That resistor certainly did its imitation of a match when it went out, huh?   :o

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


Share me

Digg  Facebook  SlashDot  Delicious  Technorati  Twitter  Google  Yahoo
Smf