Measuring low voltages with old Keithleys

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  • Опубликовано: 25 ноя 2024

Комментарии • 244

  • @reps
    @reps  5 лет назад +127

    Thanks again for 100k subs!! Here is a secret path to some old behind-the-scenes-clips: Patreon -> Posts -> Filter by Tier -> Public -> Sort by date -> Oldest first
    enjoooy **foodwishes piano tune**

  • @Andres131995
    @Andres131995 5 лет назад +174

    I never avoided my responsibilities so fast

  • @Markfps
    @Markfps 5 лет назад +9

    This channel has it's own section on youtube, no one can compare to this magnificent excellence

  • @kc8omg
    @kc8omg 5 лет назад +15

    This video was entirely worth it just for the air compressor to blow out solder blobs around 11:10, brilliant! Congrats on 100K!

  • @ZPdrumer
    @ZPdrumer 5 лет назад +45

    "skillshare" hahah that gave me a good laugh. I think almost every video I watch either mentions skill share or jlcpcb now a days

  • @prosen426
    @prosen426 5 лет назад +43

    It's always a good day when you upload a Video Mr Reps! Thank you for taking the time that you do, to do so.

  • @AstAMoore
    @AstAMoore 5 лет назад +4

    A tip for clearing stubborn vias of solder. Grab a toothpick and dip it into molten rosin or any other type of flux. Then apply heat to the via and stick the toothpick in it. Will clear it right up.

  • @iteerrex8166
    @iteerrex8166 5 лет назад +84

    Kcal/m^2*h lol that made me laugh. Congrats on 100K.

    • @Redh0und
      @Redh0und 5 лет назад +2

      for real tho, whats that even supposed to be?

    • @iteerrex8166
      @iteerrex8166 5 лет назад +1

      @@Redh0und The voltage is calculated form those values of the circuit. Its still funny, and the way he said it made it even worse. lol

    • @edgeeffect
      @edgeeffect 5 лет назад +1

      @@Redh0und force over a certain area in a certain time?

    • @1959Berre
      @1959Berre 4 года назад

      @ClickThisToSubscribe If you substitute kCal by Ws (=joule), you get Watt/m².

  • @chriswouse7713
    @chriswouse7713 5 лет назад +3

    I have played a bit with SQUIDS in my last job. Remarkable devices! Ridulous sensitive! After an install of some of our electronics into an old MEG scanner, we gave it a quick test by waving a spanner outside the sheilded room the sensor array was in and it railed the output! Congrats on 100k.

  • @markusdollinger9930
    @markusdollinger9930 5 лет назад +5

    Brilliant - as always ! You might also be interested in the Präcitronic MV40 DC-Milli-Pico-Meter. It's an instrument from the late 60ties made in GDR. It comes with a pA and a 500 Teraohm (!!) measurement range and it's also based on a chopper amplifier. I've repaired and restaurated some MV40, and they're quite fascinating. You can get one for about 30-60 Euro.

  • @DaruoshAghajaney
    @DaruoshAghajaney 5 лет назад +20

    I really enjoy your day humor. Thumbs up.

    • @reps
      @reps  5 лет назад +20

      I try to keep my night humor out of the videos, but am not always successful.

    • @DaruoshAghajaney
      @DaruoshAghajaney 5 лет назад +4

      @@reps oh, I meant DRY (stupid spell correction). you did it again man :))))

  • @Hiasibua
    @Hiasibua 5 лет назад +4

    Gratuliere, Marco!
    Macht immer wieder Spaß, zuzusehen, zu genießen und, zu sehen, wie du dich über Sachen und Details freuen kannst!

    • @reps
      @reps  5 лет назад +1

      Danke, danke

  • @devjock
    @devjock 5 лет назад +31

    Duuuuude, your metrology department is uhh, up to snuff. Holy shit you're flexing that German precision on us :D
    And rightfully so btw! Congrats on 100K!

  • @edgeeffect
    @edgeeffect 5 лет назад +3

    Woah... that 1960s voltage reference is one of the most amazing things I've ever seen.

  • @killsalot78
    @killsalot78 5 лет назад +22

    10:02, thanks for making me flinch marco

  • @zorktxandnand3774
    @zorktxandnand3774 5 лет назад +1

    there are these rare days when you click a youtube recommendation and it ticks all the boxes!
    I like it all. The content, and specially you don't dumb stuff down, had some nice trick's in there (gonna use the compressed air solder trick for sure). And an Austrian with a good sens of humor! (are you even allowed to have so much more humor then Germans?)
    You pack a lot of knowledge in a video so there is something to learn for (I guess) everyone.
    Today is a good day.

  • @RSOFT92
    @RSOFT92 5 лет назад +4

    I never thought of using my air compressor to help the "de-solder-Process".
    Congratulations on 100.000 Subs!

  • @marksmod
    @marksmod 5 лет назад +2

    Comedic gold, with a generous dash of Elektrotechnik. Always nice

  • @TheDanielConsole
    @TheDanielConsole 5 лет назад +2

    if anyone deserves more attention on RUclips, it's you. Congrats!

  • @todayonthebench
    @todayonthebench 5 лет назад +37

    With every new video, my own lab feels more and more inadequate....
    But interesting content as always!

    • @reps
      @reps  5 лет назад +17

      I use my Brymen dmm for everything and the specialized Keithleys only for tasks related to other specialized instruments of questionable necessity

    • @dasstackenblochen9250
      @dasstackenblochen9250 5 лет назад +15

      @@reps I use my multitude of oscillscopes mostly to troubleshoot my multitude of oscilloscopes, too.

    • @todayonthebench
      @todayonthebench 5 лет назад +1

      @@reps Yes, it is a self perpetuating hobby per say.
      I myself use a multimeter for 90% of everything as well.
      Except when an oscilloscope is needed, or a spectrum analyzer.

    • @greywolfblooddoom664
      @greywolfblooddoom664 5 лет назад +3

      @@reps i preferto use saltwater and my tongue. 9v gives a buzz. or a chinese 5$ multimeter.

  • @ZeroMass
    @ZeroMass 5 лет назад +3

    A slight correction, a laser pointer in itself produces no heat.. rather it is the interaction of the photons landing on a target surface and absorbing the energy.

    • @reps
      @reps  5 лет назад +2

      Is your special lazer channel with dozens of videos supposed to give credibility to such an outrageous claim? 😇

    • @ZeroMass
      @ZeroMass 5 лет назад +2

      @@reps lol.. Something like that
      😜🍺

  • @andymouse
    @andymouse 5 лет назад +2

    I love theses precision vids and with the lower and lower voltage and current specs of readily available "bits of kit" all the more relevant...cheers!

  • @srjskam
    @srjskam 5 лет назад +20

    If you have any untrustworthy steel bars, better store them behind trustworthy steel bars. They're up to no good.

  • @G2bb101
    @G2bb101 5 лет назад +1

    I have no idea what any of that stuff is, but I just love the way you show it off I can't help but keep watching your videos. Keep up the good, and entertaining work

  • @lohikarhu734
    @lohikarhu734 3 года назад +1

    That funny reduction geared pot also appears in early Tektronix scopes...and, stacked with another standard pot, for the horizontal position control...
    Proper press-fit connections are used in automotive applications because they are so very reliable..."proper" ;-)

  • @DrTune
    @DrTune 5 лет назад +3

    Marco every video is a treat! I love how each shot is clearly given a bit of thought beforehand. You're always funny and I always learn something - Perfect.

  • @PIXELamPC
    @PIXELamPC 5 лет назад +8

    for me you are the "old tony" of electronics ^^

    • @Ant0ine64
      @Ant0ine64 5 лет назад

      That right, first time I come on the channel I don't understand why am I here

  • @MarcelHuguenin
    @MarcelHuguenin 5 лет назад +1

    Congrats with 100k. It's always a pleasure to watch your videos.

  • @Lagggerengineering
    @Lagggerengineering 5 лет назад +9

    How is that multi-oscillo-function-generator-meter-scope project going?
    I am pretty hyped about it!

    • @goosenp
      @goosenp 5 лет назад +1

      The project is named OSMU, I'm also curious about it

  • @leachim66
    @leachim66 5 лет назад +11

    I can only find 1% precision toothpicks, can you please provide your source for low noise toothpicks? Thank you in advance

    • @AsymptoteInverse
      @AsymptoteInverse 5 лет назад +1

      I think Mouser used to carry 0.1% toothpicks, but they discontinued them about five years ago because of low demand. Personally, if you're getting into measurements this serious, spend the extra money and buy Vishay's 0.001% laser-trimmed birch ones.

  • @markgreco1962
    @markgreco1962 5 лет назад +5

    in all seriousness you deserve every on of the 100k subs. long time fan Mark.

    • @reps
      @reps  5 лет назад

      Thank you!

    • @pagiatis
      @pagiatis 5 лет назад

      @@reps Oh, hi Mark!

  • @JohnHill-qo3hb
    @JohnHill-qo3hb 5 лет назад +2

    YAGV... Yet Another Great Video, thanks, love your humor. Next time you do some ultra low voltage measurements, be sure to clean all electric al contact surfaces, back in the day I attended a coax cable connector cleaning course, significant difference between before and after cleaning measurements, often enough to bring an out of spec device into spec.

  • @DeclanCrane
    @DeclanCrane 5 лет назад +5

    Underrated channel

  • @timthompson468
    @timthompson468 5 лет назад +1

    Very interesting. I’m just glad my applications don’t get anywhere near that realm. By the way, I’ve seen those same pots with the ball bearings in the Comdyna GP6 analog computer.

  • @ZacksLab
    @ZacksLab 5 лет назад +1

    dude... the air compressor desoldering trick for through hole was awesome, thanks for sharing that!

  • @maurosobreira8695
    @maurosobreira8695 5 лет назад +2

    Marcos well deserved! Congrats and keep the good stuff coming!

  • @perli216
    @perli216 5 лет назад +1

    For cleaning stuff from pcb holes it helps to add new solder (just so that you have a little bump over it) and then put a lot of flux on it (for me those flux pens works best). Then just use braid normally. Edit: Solder pump from the other side if you have access.

  • @strutting2u229
    @strutting2u229 5 лет назад +6

    I just wanna tell you...
    Aye congratulations 🎊

    • @reps
      @reps  5 лет назад

      TIL you can google emojis you don't recognize 😁 this one is a Confetti Ball

  • @metricstormtrooper
    @metricstormtrooper 5 лет назад

    Congratulation Marco, I understand very little of what you talk about, BUT i enjoy it ALL.

  • @CoolMusicToMyEars
    @CoolMusicToMyEars 2 года назад +1

    keithley 155 so stable so well built :)

  • @CoolMusicToMyEars
    @CoolMusicToMyEars 2 года назад

    The Keithley 2 Pin pure copper connector many years ago Just for the connector was around £200, I used crimped Gold Plated Copper on Silver plated copper PTFE Twisted pair with Silver Screen outer Tufnell Outer wrapped, NO SOLDER used in the UKAS Test Laboratory on Low voltage cable for any DC measurements,

  • @CoolMusicToMyEars
    @CoolMusicToMyEars 2 года назад

    I love those Keithley 181 nV Digital Meters, Custom Plug for that 40 years ago was around £200, True copper pins

  • @marwinthedja5450
    @marwinthedja5450 5 лет назад +5

    Amazing toothpick!
    Congrats to 100K ;)

    • @underwoodblog
      @underwoodblog 5 лет назад

      he needs a tiny pointing hand that andreas uses.

  • @TheDefpom
    @TheDefpom 5 лет назад +2

    Congratulations on the 100K subs, not surprising considering how good your videos are... I should hit 10K in about 6 months or so.

    • @reps
      @reps  5 лет назад +1

      start flaunting that sexy sleeveless shirt again and you'll be much faster than that I bet 🥰

    • @TheDefpom
      @TheDefpom 5 лет назад

      Marco Reps - lol, maybe next summer, it’s getting a bit cold for that now.

  • @Moerdock
    @Moerdock 5 лет назад +2

    finaly a new vid from you...thanks man...not all of the stuff you are talking about makes totally sense to me but i love watching youre vids anyway...so keep up the good work. oh and gratz for the 100k

  • @NNNILabs
    @NNNILabs 5 лет назад +4

    Congrats Marco!
    Your content is such good quality and you inspired me to narrate my videos too, thanks a lot! :3

    • @reps
      @reps  5 лет назад +2

      Thank you! Your rail gun looks interesting, sadly it is illegal to try that here

    • @NNNILabs
      @NNNILabs 5 лет назад

      @@reps I'm trying not to faint hehe
      However on a more serious note, if you have some ideas I could try them for you.

  • @VKRenato
    @VKRenato 5 лет назад +1

    Congrats on 100k subs. And thank you for all your videos. You deserve much more subscribers.

    • @reps
      @reps  5 лет назад +1

      Thanks man

  • @captiveimage
    @captiveimage 2 года назад

    That potentiometer is nothing short of a piece of artwork.

  • @CoolMusicToMyEars
    @CoolMusicToMyEars 2 года назад

    Those Solartron 1081 DMMs are nice, we had one for a UKAS Audit in the UKAS Laboratory

  • @mattimhiyasmith
    @mattimhiyasmith 5 лет назад

    @10:56 A technician at my work told me when you can't get all the solder out it's good to add some additional solder will help to get it out

  • @hannibalfeather3932
    @hannibalfeather3932 5 лет назад +1

    Those PCB press fit connectors can be made extremely reliable. EEVBlog 517 was an airbag controller teardown and it used those press fit things. If it's reliable enough for an airbag, they're probably reliable enough for a front panel.

    • @reps
      @reps  5 лет назад +2

      Oh yes I vaguely remember that ... but I still don't like it

  • @1959Berre
    @1959Berre 5 лет назад

    Congrats on the subscriptions. I guess a lot of them are not in electronics; they probably like the way you make boring stuff funny. Besides, the wonderful accent is the cherry on the cake. Keep on the good job.

  • @ScotHarkins
    @ScotHarkins 4 года назад +1

    I could swear you said "fecovolt". That needs to be a unit of measure! Not sure what ASCII char would represent "feco", but could imagine a unicode option.

  • @dogdipstick
    @dogdipstick 2 года назад

    mmm What a Wheatstone. What a bridge. Phenomenal.

  • @alirezaamouzadeh4920
    @alirezaamouzadeh4920 4 года назад

    I love your sense of humor. 👍🏻

  • @alanalvarez7811
    @alanalvarez7811 5 лет назад +1

    Congratulations on 100k keep it up man!

  • @teslakovalaborator
    @teslakovalaborator 5 лет назад +11

    RUclips announced me this 14 minutes delayed. *Angeriness intensifies*

    • @ZeroMass
      @ZeroMass 5 лет назад +1

      YT gets me with that all the time..
      "XX uploaded XX" I click and the video was posted 7hrs ago..
      Curse you RUclips!!😤

  • @aksting
    @aksting 5 лет назад +1

    Are you planning on making your own version of a Theremin instrument with those microvolts and nanovolts?

  • @douro20
    @douro20 5 лет назад

    My Heathkit IT-18 transistor checker has that type of multiturn variable resistor inside of it. The thing is extraordinarily sensitive.

  • @amontodd
    @amontodd 5 лет назад +1

    10/10 Commentary! Most of the time I can't pay attention to the educational side of the video because I'm laughing so much. Well done :)

  • @brianmangan2459
    @brianmangan2459 5 лет назад +5

    I have never laughed so hard at a flame thrower before.

  • @QUIX2468
    @QUIX2468 5 лет назад

    Did you know about the VEBEG? It's a company that sells stuff from the german government that they don't need any more. They are selling all kinds of things, from tools to cars and even big research Ships. But most importantly they sell measuring equipment and such stuff. At ths time they have a signal generator that has a working range from 10MHz to 20GHz and a frequency analyser that goes down to 10 mikro Hertz

  • @runforitman
    @runforitman 5 лет назад

    Best RUclips channel ngl

  • @lmamakos
    @lmamakos 3 года назад

    You got to extraordinary measures to find and acquire ghosts for your lab, whereupon you then start chasing them. (Or maybe they chase you!) Well done.

  • @Markfps
    @Markfps 5 лет назад +1

    I'm in love with this content, I have a friend that has no Idea of electronics and loves your videos Marco, that says something, how the f**k can you make it so entertaining, amazing repair! Very entertaining

  • @THEBIGMEOW
    @THEBIGMEOW 5 лет назад +1

    Congratulations 🎊
    Keep up the great work ♥

  • @MrBelakovi71
    @MrBelakovi71 3 года назад

    You are an original don't kid us, you still have a unquenchable thirst for digits ,but before less digits ,and now more digits.

  • @nikmilosevic1696
    @nikmilosevic1696 5 лет назад

    Congrats on the 100K, and on another great video.

  • @nickstanley5064
    @nickstanley5064 5 лет назад

    I went through a brief period of volt-nut a few months back, now I have an HP3478 and 4 LM399s, not sure what to do with them and I don't even have a soldering iron yet. Planning on making a small station based on cheap T12 clone tips, but thermocouples, how to get readings from them and your boi, thermal EMF are really confusing me. BTW, the guy that sold me the meter has two of those Keithley 6 1/2 nanovoltmeters, as well as HP 34401s, 3457s, K2000, Tek TDS3052,etc....Have no idea what his job is(won't tell me), but he seems to have access to lots of T&M equipment, industrials electromechanical stuff. Kinda regret buying the 3478 (3.500.000VND or 150USD).
    Great video, sorry for long post. Greeting from Vietnam.

    • @reps
      @reps  5 лет назад +1

      Voltnut detected, stay away from the guy or you'll get infected. Maybe it is already too late :)

  • @cfeigel
    @cfeigel 5 лет назад +6

    13:43 gesundheit!

  • @MCsCreations
    @MCsCreations 5 лет назад

    Really, really interesting! 😃
    Congrats for the 100k subscribers mark! 😃

    • @reps
      @reps  5 лет назад +1

      Thank you for your consistent commenting! I reply rarely, but I see them always :)

    • @MCsCreations
      @MCsCreations 5 лет назад

      @@reps Thanks! 😊
      But don't worry, I totally understand. It would be impossible to answer to everyone. 😊

  • @CoolMusicToMyEars
    @CoolMusicToMyEars 2 года назад

    Marco I have a Keithley 148 Null detector :) 10nV FSD with so stable zero, Valve input in a copper box with input terminals

  • @hobbified
    @hobbified Год назад

    That 9V battery brought back memories of a time when there were actual price tags.

  • @joeybushagour2612
    @joeybushagour2612 5 лет назад

    Congrats on 100k! Great video as always!

    • @reps
      @reps  5 лет назад

      Thank you

  • @absak
    @absak 2 месяца назад

    These videos are just sooooooo good

  • @m3chanist
    @m3chanist 5 лет назад

    That air compressor, is it inside some kind of mystical sound suppression field? Or just at the end of a reeeeally long hose?

  • @hernancoronel
    @hernancoronel 4 года назад

    Hey Marco love your videos, thank you! Which compressor did you buy? Care to share your selection criteria in one of your videos? Thanks for the great content!

  • @matthewsmith5883
    @matthewsmith5883 5 лет назад

    Congrats on 100 000 subs!

    • @reps
      @reps  5 лет назад

      Thanks Mr. Smith

  • @madsbs123
    @madsbs123 5 лет назад

    What's up with the black gloves all the time Marco Reps?

  • @cocosloan3748
    @cocosloan3748 5 лет назад

    Ty Marco-We learn so much here!

  • @PiratCarribean
    @PiratCarribean 2 года назад

    I have an old Keithley KPCI-488 GPIB card from 1997 and a v5.1 driver floppy. Are you interested in it?

  • @Hasitier
    @Hasitier 5 лет назад

    Hey Marco, auf zu den nächsten 100k. Wo gibt’s eigentlich die Orangen Handschuhe?

  • @BrendaEM
    @BrendaEM 5 лет назад

    Have you checked out SERFs. They are like SQUIDs, but more so, perhaps 10 times more sensitive to magnatism. The word is on the street, that they can detect the magnetic field of a few electrons, perhaps one. They are working on a SERF on a chip.

  • @silvan6996
    @silvan6996 Год назад

    Hi marko i just tryed ordering a keithley 181 from us. To uk. Git stopped in customs and sent back. How do you manage to get things shipped over from the us to im guessing germany?

  • @PhG1961
    @PhG1961 5 лет назад +1

    Awesome and excellent. Congratz on the >100k subscribers. Nice entertainment with your special German 'dry humor'...

  • @CatboyChemicalSociety
    @CatboyChemicalSociety 5 лет назад +1

    1:00 the ever popular KE KE KE KEITHLY REPAIR

  • @ChaosEmerald85
    @ChaosEmerald85 5 лет назад

    congrats on the 100k!

  • @ed-jf3xh
    @ed-jf3xh 5 лет назад

    If you've never seen the potentiometer with the bearings, you've lead a sheltered life. Welcome to the world of older stuff.

  • @KillerXtreme
    @KillerXtreme 5 лет назад

    I absolutely lost it at the sneeze, well done lol.

  • @ronin181990
    @ronin181990 5 лет назад

    You can blow out the solder from through holes with compressed air?
    Mind blown. Thanks for saving future me hours of frustration.

    • @smokinjoe1256
      @smokinjoe1256 5 лет назад

      no that doesnt work.

    • @ronin181990
      @ronin181990 5 лет назад +1

      @@smokinjoe1256 I just tried it and it works.

    • @smokinjoe1256
      @smokinjoe1256 5 лет назад

      @@ronin181990 that was just luck....try it again

    • @reps
      @reps  5 лет назад +2

      I just learnt, that under certain conditions it can build up some static charge, so use with care

    • @ronin181990
      @ronin181990 5 лет назад

      @@reps It also splatters the solder a bit. So cleanup afterwards is required.
      But as a last resort if the wick or the pump doesn't work it's brilliant.

  • @tylerufen
    @tylerufen 5 лет назад

    I love you 😊
    I'm sure you could make your videos hours-long and nobody would complain... even livestream your entire life...

  • @Braeden123698745
    @Braeden123698745 5 лет назад

    I've tried for so long to understand wheatstone bridges. You explained it perfectly in 5 seconds. Thank you SO MUCH!

    • @reps
      @reps  5 лет назад

      thanks to www.falstad.com/circuit/

  • @filedotzip
    @filedotzip 5 лет назад

    Marco, what are those side cutters youre using? they look solid.

  • @babylonfive
    @babylonfive 5 лет назад

    Congratulations!

  • @joshphilips9919
    @joshphilips9919 5 лет назад

    Download Xournal for PDF/schematic notation! Especially if you have a stylus. Free, old and totally open source

  • @Rouverius
    @Rouverius 5 лет назад

    Congrats on 100K!

    • @reps
      @reps  5 лет назад

      Appreciate it!

  • @chupamishuevos303
    @chupamishuevos303 5 лет назад +4

    🤣🤣🤣🤣🤣🤣that sneeze tho made me laugh so damn hard man thank you so much for this pornographic demonstrator of old tech just amazing how sexy technology is.

  • @RRIDDICC
    @RRIDDICC 3 года назад

    @1:31 pink gloves... shiver... LOL

  • @CuriousLynx
    @CuriousLynx Год назад

    05:10 Why did you cut this specific wire?

  • @HiSmartAlarms
    @HiSmartAlarms 5 лет назад +1

    Hey Marco love the videos keep them up!

    • @reps
      @reps  5 лет назад +1

      Thanks, I will!