Author Topic: Test Equipment Anonymous (TEA) group therapy thread  (Read 2608193 times)

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Offline 0culus

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #44575 on: December 09, 2019, 03:24:56 pm »
Indeed. Same. I find my 35s incredibly useful for repetitive calculations and simple problem solving. I've designed filters with it and paper quite happily. No Libreoffice calc in sight  :-DD

For more complicated stuff I use python / libreoffice calc. I did use full blown desktop Wolfram Mathematica until I couldn't get someone else to pay for it  :-DD

I've also found that reasoning about a problem in order to program it into my calculator leads to greater understanding of said problem. It's a win-win.  :-+
 
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Online mnementh

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #44576 on: December 09, 2019, 03:28:36 pm »
I just adapt to the tools available at the time.



I learned to use an abacus, but not proficiently. I learned to use a slide rule proficiently, and still have it.

For the memories (and to bolster my failing memory):      For Tax time:   

mnem
 
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Online mnementh

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #44577 on: December 09, 2019, 03:32:59 pm »
Slow down you mob 6 pages in 12 hours major verbal diarrhea :-DD

Suck it up, princess.   :-DD

Ow! Ouch! There appears to be a pea stuck under all the pages of this topic. Oh no, my mistake - it's a green coffee bean.  ;D

Nope... a dingleberry.  >:D  Go wash your hands.  :-DD   And for Ifni's sake, don't try to roast it.  :o

mnem
Okay... mnem is weirdening again...
 

Online mnementh

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #44578 on: December 09, 2019, 03:41:09 pm »
am also looking for a vintage rpn hp calculator. my plan is to get some of med's tek blue paint and give it a couple of coats.

no need to mask off the keyboard or the display.  it will be more useful without that rubbish anyhow.hmmmmmm.   in fact.....maybe just dipping it in a bucket of paint would be quicker.

edit   hey med.  will the paint adhere better if i give it a good treatment with some 200 grit?

Now yer just agitatin'.       >:D

mnem
« Last Edit: December 09, 2019, 03:44:10 pm by mnementh »
 
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Online med6753

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #44579 on: December 09, 2019, 03:42:58 pm »
am also looking for a vintage rpn hp calculator.

my plan is to get some of med's tek blue paint and give it a couple of coats.

no need to mask off the keyboard or the display.  it will be more useful without that rubbish anyhow.

hmmmmmm.   in fact.....maybe just dipping it in a bucket of paint would be quicker.

edit   hey med.  will the paint adhere better if i give it a good treatment with some 200 grit?

The Krylon spray paint will adhere to plastic just fine with no additional treatment.
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Offline worsthorse

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #44580 on: December 09, 2019, 03:44:41 pm »
There are times, in this thread, when it seems better to sit back and

     :popcorn:

for a while.

specialization is for insects.
 
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Online med6753

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #44581 on: December 09, 2019, 03:51:04 pm »
And there are days where I shouldn't get out of bed....

Upgrading Mint 17.3 to 18 via terminal commands....a real treat.

I spilled a full mug of coffee all over bench 2..... :palm:
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Online bd139

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #44582 on: December 09, 2019, 03:53:20 pm »
Code: [Select]
# apt dist-upgrade
# apt spill-coffee
 

Online med6753

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #44583 on: December 09, 2019, 03:54:02 pm »
Code: [Select]
# apt dist-upgrade
# apt spill-coffee

You're no fucking help.  :-DD
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Offline tggzzz

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #44584 on: December 09, 2019, 03:56:02 pm »
absolutely. add to that some chemicals that I would definitely stay away from such as hydroflouric acid.

Here's a few more, delivered with a delightful sense of humour: https://blogs.sciencemag.org/pipeline/archives/category/things-i-wont-work-with

Random example:
Quote
Over the years, I’ve probably had more hits on my “Sand Won’t Save You This Time” post than on any other single one on the site. That details the fun you can have with chloride trifluoride, and believe me, it continues (along with its neighbor, bromine trifluoride) to be on the “Things I Won’t Work With” list. The only time I see either of them in the synthetic chemistry literature is when a paper by Shlomo Rozen pops up (for example), but despite his efforts on its behalf, I still won’t touch the stuff. And if anyone needs any more proof as to why, I present this video, made at some point by some French lunatics. You may observe the mild reactivity of this gentle substance as it encounters various common laboratory materials, and draw your own conclusions. We have Plexiglas, a rubber glove, clean leather, not-so-clean leather, a gas mask, a piece of wood, and a wet glove. Some of this, under ordinary circumstances, might be considered protective equipment. But not here.

or:
Quote
In a comment to my post on putting out fires last week, one commenter mentioned the utility of the good old sand bucket, and wondered if there was anything that would go on to set the sand on fire. Thanks to a note from reader Robert L., I can report that there is indeed such a reagent
...
It is apparently about the most vigorous fluorinating agent known, and is much more difficult to handle than fluorine gas. That’s one of those statements you don’t get to hear very often, and it should be enough to make any sensible chemist turn around smartly and head down the hall in the other direction.

or an example where HF is merely a precursor which has to be first purified - and then trapped as it boils off:
Quote
The SI of the paper casually mentions that you can use double vacuum distillation in a metal line to get your HF sufficiently anhydrous for the reaction, and you can go ahead and get cranking on that without waiting for me to show up.

You condense the latter two reagents onto a solid charge of the bromate at liquid nitrogen temperatures, and then let it warm all the way up to -78C, at which point a “vigorous” reaction sets in. Imagine running these things for the first time, waiting for said reaction and wondering if it’s going to stay inside your apparatus or invigorate itself all over the ceiling. Once you have made your bromyl fluoride, you raise the temperature a bit more to -40 and pump off the excess HF and pentafluoride, and you will want an extremely capable trap on the other end of that process, which according to the paper can take several hours, and probably had better.

last example:
Quote
Take this paper from Jean’ne Shreeve’s group at Idaho, a lab that has certainly given us all some alarming compounds over the years. If you or I (’cause we’re sensible, right?) look at a well-known crater-maker like dinitropyrazolopyrazole, we’ll probably decide that it has pretty much all the nitrogens it needs, if not more. But that latest paper builds off the question “How do we cram more nitro groups into this thing?”, and that’s something that wouldn’t have occurred to me to ask. Saying “this compounds doesn’t have enough nitro groups” is, for most chemists, like saying “You know, this lab doesn’t have enough flying glass in it” – pretty much the same observation, in the end.
« Last Edit: December 09, 2019, 04:05:55 pm by tggzzz »
There are lies, damned lies, statistics - and ADC/DAC specs.
Glider pilot's aphorism: "there is no substitute for span". Retort: "There is a substitute: skill+imagination. But you can buy span".
Having fun doing more, with less
 
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Online bd139

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #44585 on: December 09, 2019, 03:58:03 pm »

Code: [Select]
# apt dist-upgrade
# apt spill-coffee

You're no fucking help.  :-DD
>:D

Seller didn't accept my offer on new toy :(

My Condor power supply just arrived:





Nicely built. Will see if it works later when I can be bothered to lash up a suicide cord
 

Online med6753

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #44586 on: December 09, 2019, 04:01:37 pm »
Any good technician worth his salt always has a suicide cord on hand.  ::)

Oh that's right....you're an engineer.....don't hang yourself with it.  :palm: :-DD
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Online bd139

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #44587 on: December 09, 2019, 04:03:41 pm »
 :-DD

The engineer in me is wondering if I can add OVP to it seeing as it has the footprints  :-+
 

Online med6753

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #44588 on: December 09, 2019, 04:06:54 pm »
Pray tell...what be "OVP"?
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Online Cerebus

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #44589 on: December 09, 2019, 04:09:10 pm »
Code: [Select]
# apt dist-upgrade
# apt spill-coffee

You're no fucking help.  :-DD

Yeah. It should have been:
Code: [Select]
apt-get --dry-run spill-coffee
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 #44590 on: December 09, 2019, 04:11:07 pm »
Holy crap, this Mint upgrade is taking forever. And you can see this obvious family resemblance to Ubuntu.
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Online bd139

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #44591 on: December 09, 2019, 04:12:30 pm »
I have never done a dist-upgrade on any Debian derivative in the 20 odd years I've been using it.  :popcorn:

Pray tell...what be "OVP"?

Over-voltage protection

Fat SCR shorts the output if it goes above target.
 

Online med6753

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #44592 on: December 09, 2019, 04:14:43 pm »
Go for it...you're the one who has to fix it if it goes south on you.....or put out the fire.  >:D ;D
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Online bd139

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #44593 on: December 09, 2019, 04:16:28 pm »
Yep. I was thinking more that I'm fed up of dodging bits of flying MOSFET  :-DD

Random thing. Found this rather amusing. ST TnG camera stablised  :-DD



 

Online Cerebus

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #44594 on: December 09, 2019, 04:17:14 pm »
Holy crap, this Mint upgrade is taking forever. And you can see this obvious family resemblance to Ubuntu.

Serious suggestion this time:
Code: [Select]
apt-get update
apt-get --download-only dist-upgrade

before you get properly started. You can walk away and leave the "--download-only" to its own devices. Then when you're ready to sit down and actually do the upgrade all the packages are cached locally and it only takes a few minutes and, most importantly, you only have to pay attention for those few minutes.
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 #44595 on: December 09, 2019, 04:21:02 pm »
Yep. I was thinking more that I'm fed up of dodging bits of flying MOSFET  :-DD

Random thing. Found this rather amusing. ST TnG camera stablised  :-DD



Ever see a chip get blown clean through a TO-3 case leaving a nice little hole? I have, multiple times, with early switch regulators at IBM that clearly had a design flaw.  :scared:

Edit....makes a hell of a bang too.
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Online med6753

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #44596 on: December 09, 2019, 04:22:22 pm »
Holy crap, this Mint upgrade is taking forever. And you can see this obvious family resemblance to Ubuntu.

Serious suggestion this time:
Code: [Select]
apt-get update
apt-get --download-only dist-upgrade

before you get properly started. You can walk away and leave the "--download-only" to its own devices. Then when you're ready to sit down and actually do the upgrade all the packages are cached locally and it only takes a few minutes and, most importantly, you only have to pay attention for those few minutes.

Too late...it's doing the upgrade.
An old gray beard with an attitude.
 

Online Cerebus

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #44597 on: December 09, 2019, 04:52:50 pm »
Holy crap, this Mint upgrade is taking forever. And you can see this obvious family resemblance to Ubuntu.

Serious suggestion this time:
Code: [Select]
apt-get update
apt-get --download-only dist-upgrade

before you get properly started. You can walk away and leave the "--download-only" to its own devices. Then when you're ready to sit down and actually do the upgrade all the packages are cached locally and it only takes a few minutes and, most importantly, you only have to pay attention for those few minutes.

Too late...it's doing the upgrade.

Oh I guessed it was too late, but there's always next time.
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 #44598 on: December 09, 2019, 04:55:22 pm »
The patient survived. Mint 18 successfully installed.  :-+ Mint 19 is the latest distro but I think I'll wait a while before upgrading.
An old gray beard with an attitude.
 

Online bd139

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #44599 on: December 09, 2019, 05:41:15 pm »
So invested in a cheap power supply module. Now need to invest in an enclosure. And like fuck there's anything cheap and off the shelf. Looks like I may have to actually invest in some sheet metalwork tools.
 


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