Ultra Precise Multimeter* Datron 4950 Repair** & Analysis

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  • Опубликовано: 23 янв 2025

Комментарии • 133

  • @reps
    @reps  Год назад +121

    Happy #worldmetrologyday

    • @walterwhite2291
      @walterwhite2291 Год назад +11

      Holy cow 3 videos in a week, must be Christmas or something. 👍

    • @IanScottJohnston
      @IanScottJohnston Год назад +9

      20th May......yes, I plan on staying in the workshop tonight with my 3458A and raising a glass with her. We will be sharing a very, very small bag of PPM's.

    • @MrEdwinHubble
      @MrEdwinHubble Год назад

      Time to look into the Präcitronic DC MV40-Milli-Pico meter again...

    • @Edisson.
      @Edisson. Год назад

      @@IanScottJohnston Hmmm, I'll go to the workshop too and look at the bottom of the vodka bottle so that when I look at my Rigol I forget that there is any PPM 🤪

  • @jb3757
    @jb3757 Год назад +16

    The sarcasm is a metrology grade, hermetically sealed no laughter masterpiece.
    Precious.

  • @xDevscom_EE
    @xDevscom_EE Год назад +170

    You can also disable limit on ranges and use it like "normal" 1271 with degraded specs. 4950 uses better resistors than 1281 in ohm assemblies.

    • @reps
      @reps  Год назад +134

      Wow! BAND LMT: OFF how did I not try that before 😮That is great!

  • @marcus_w0
    @marcus_w0 Год назад +14

    The fact, that he as a German, speaks like a scotch and using terms like "yoink" for specialized tasks, is the reason I'm subscribed right from the start. Thumbs up.

  • @MeriaDuck
    @MeriaDuck Год назад +40

    That grey PCB looks like pure obtanium with parts worth their weight in some precious metal 😍

    • @MeriaDuck
      @MeriaDuck Год назад +9

      I meant unobtanium of course

  • @bansci
    @bansci Год назад +14

    Beautiful Datron engineering again, thanks for the tour!

  • @Txepetxcc
    @Txepetxcc Год назад +3

    Power electronics engineer here. I've been in 3 labs already and i tell you in my field nobody knows how to design proper sensor conditioning stages. Thanks to you i hear terms like zero drift and autozero and chopping

  • @kayaker2k
    @kayaker2k Год назад +1

    Wow that fast pass reference threw me back 20 years!
    Nice video as always!

  • @tannerbass7146
    @tannerbass7146 Год назад +18

    My Datron 1082 is easily my favorite tool to use 😊
    They really made some slick equipment back in the day!

    • @ziginox
      @ziginox Год назад +1

      Absolutely gorgeous with the panaplex displays, too! It's a shame the test gear market shrank so much in the 90's and early 2000s.

  • @Megabobster
    @Megabobster Год назад +2

    inter board communication makes me hope it's something super simple like needing to reseat the interconnects. looking forward to seeing this guy in action!

  • @siegmundeurades5753
    @siegmundeurades5753 Год назад +3

    I for one am extremely happy with the release schedule as of late.

  • @ricolorenz7307
    @ricolorenz7307 Год назад

    I have no idea what you're talking about 80.0008521% of the time, and none of your content has any relevance to me, but your videos are so well made I love watching them. It really shows it doesn't matter what you're doing, if you can make entertaining videos, people will watch them. This could be one of the most boring channels on RUclips, but instead it's one of the best.
    Also, the millisecond advantage joke was very funny
    Edit: 27:43 CLOSE YOUR EYES CHILDREN

  • @AmiPurple
    @AmiPurple Год назад +1

    These videos are never too dense! All this talk about ppms sounds like lovely music

  • @ericlotze7724
    @ericlotze7724 Год назад +6

    16:36 …and I thought it was a mere LCD, but it is a gorgeous VFD !

  • @JagerEinheit
    @JagerEinheit Год назад +36

    So Marco if I ever get around to writing my movie script about disappearing PPM's would you want to be the evil villain, hording the ppm's? or the hyper intelligent good guy german who is measuring the missing ppm's to track down the villain?
    the twist is both are the same person, but one measures ppms... and one "loses"/ "adjusts" the calibration data and steals them for his ppm vault.

  • @PCBWay
    @PCBWay Год назад +2

    Fabulous as alwaysssss👍👍👍👍👍

  • @ericlotze7724
    @ericlotze7724 Год назад +1

    14:41 I’d love to have the recipe !
    Even if in the next video, it will make a wonderful drink for celebrating World Metrology Day!

    • @MeriaDuck
      @MeriaDuck Год назад +1

      I read ' calibrating World Metrology Day' 🤣

  • @Sharkie1717
    @Sharkie1717 Год назад +1

    So funny! I love seeing all this metrology stuff. Can't wait for the next video.

  • @MoritzvonSchweinitz
    @MoritzvonSchweinitz Год назад +7

    No mention of the...unfortunate...form of the cutouts on the reference at 28:00 ?

    • @dawa11122
      @dawa11122 Год назад +4

      he "commented" that on the ADR1000 video at 5:00 :P

  • @lambda7652
    @lambda7652 Год назад +6

    Waht is all this Multimeter talk on the Power station and vacuum cleaner channel

  • @projectartichoke
    @projectartichoke Год назад +44

    Those tin whiskers are concerning, I wonder if disturbing them could be the cause of the failure. They can blow around quite easily and can really travel. Best to dampen a small artist's brush with de-ionized water and use that to remove them. They will cling to a damp brush which you can wipe often with a damp cloth to prevent redistributing them.

    • @cambridgemart2075
      @cambridgemart2075 Год назад +2

      Unless this is is fairly modern, i.e RoHS compliant, I'm surprised to see tin whiskers.

  • @namAehT
    @namAehT Год назад +103

    Oh boy, I know exactly what I'm going to be doing for the next 32 minutes. Hint: Not work.

    • @JenkinsUSA
      @JenkinsUSA Год назад

      I’m grabbing a beer 😂

    • @austo2010
      @austo2010 Год назад

      This counts as CPD hours I think

    • @zyeborm
      @zyeborm Год назад

      If your work is event tangentially related then I think this counts

  • @OK_ACME
    @OK_ACME Год назад +25

    I don't understand much about electronics (yes, monkeys can learn). But I like the humor in your video's. Keep up the good work! :)

  • @antoineroquentin2297
    @antoineroquentin2297 Год назад

    Die Videos sind mit so viel Liebe gemacht.

  • @irritantno9
    @irritantno9 Год назад

    Finally a reps video that’s representative of all of my repair attempts. Ich liebe dich!

  • @MoritzvonSchweinitz
    @MoritzvonSchweinitz Год назад +10

    "I enjoy making my videos less than half an hour long"...exactly at 30:00 ! 😀

  • @floodo1
    @floodo1 Год назад

    My mom says “pray tell”, surprised to hear it from non-American (-8. What a beauty that device is

  • @jamesmauer7398
    @jamesmauer7398 Год назад

    Cool multimeter! I didn't know such devices existed with the very limited measurement ranges. Looking forward to the next video!

  • @lohikarhu734
    @lohikarhu734 Год назад +9

    how do you like the MXO4? I was a München AE for the scope group for 3+ years, and made many, many suggestions for changes and fixes to the 'previous generations'... I'd be very interested to spend some time on the MXO4, to see how many of my suggestions made their way into that machine...from the nice screen shot at 24:34, it looks like several (many?) of my inputs finally made their way to your bench!!

    • @reps
      @reps  Год назад +4

      Love it. The most recent firmware upgrade wiped out every last one of the few small complaints I had. Longer MXO4 vid coming ...

    • @derkarhu5079
      @derkarhu5079 Год назад

      Cool... good to hear!
      Both comments 🇨🇦🐻‍❄️🇩🇪

    • @derkarhu5079
      @derkarhu5079 Год назад

      Btw, I have a couple of "general radio" 0,005% resistors that would be interesting to check out, 100k and 1,000M...

  • @akkudakkupl
    @akkudakkupl Год назад +12

    That reference module has some 1930's Germany vibes :D

    • @swebigmac100
      @swebigmac100 Год назад

      28:04 straight to the comments 😆😆😆

  • @vincei4252
    @vincei4252 Год назад +7

    Marco, I can hear your solar power inverters whirring in the background. Seems to be a new permanent addition to the channel :)

    • @ericlotze7724
      @ericlotze7724 Год назад +1

      Granted schedule is probably plenty full, but a mod (or better yet an Open Source Custom One!) would be a great video.

  • @hermannschaefer4777
    @hermannschaefer4777 Год назад +2

    Repaired 2 Datron 1041 from the 80s in the recent years and they still impress me with their accuracy (~0.01% +1dig DC). Had to replace almost all caps, but main problem were dead LS74-chip, almost all of them were broken. Seems they age quite fast...

  • @supercompooper
    @supercompooper Год назад

    Your voice is so soothing. On every level. 😊

    • @PCBWay
      @PCBWay Год назад

      Fully aggree

  • @JohnUsp
    @JohnUsp Год назад

    As always, an Awesome Video. Thank you Marco.

  • @TheRemo176
    @TheRemo176 Год назад +1

    Fantastic video ! At 25:35, is that outerwilds I hear playing in the background by any chance ?

    • @reps
      @reps  Год назад

      I think that might be @HeleneVogelsinger shining through

  • @rushoffman965
    @rushoffman965 Год назад +2

    What is the purpose of the ceramic beads on leads? I noticed some are on each leg of a component, while others are on "jumper" wires.

    • @rorywilliams5131
      @rorywilliams5131 Год назад

      On the Zeners it is to space the hot component off the board. The test point would not be usable if it was pulled tight to the board by the cut and clench machine.

  • @chicoroth8679
    @chicoroth8679 Год назад +2

    very, very impressive. thank you.

  • @Edisson.
    @Edisson. Год назад +20

    Oh no, perfect reverse engineering has turned into less perfect reverse service - from a little functional to non-functional 😥 I'm always horrified by this, when I put completely new ones among evenly aged parts, the circuit starts to work differently. You can handle it and recalibrate, I fully trust you 👍 such a super machine must work.
    Nice day 🙂 Tom

    • @laserdan
      @laserdan Год назад +5

      If it ain't broke, fix it till it is!

    • @Edisson.
      @Edisson. Год назад +2

      @@laserdan Although they say "It works, don't touch it" but that is not the case in this case, parts that would cause major damage if they fail have to be replaced after a while. When working on such large old PCBs, I am always concerned about their bending, when thin paths may crack, or when vacuuming, I am concerned about damage to the through-holes on multi-layer boards - it becomes brittle with age.

  • @floodo1
    @floodo1 Год назад

    this guy with the gamer humor and using MS Paint

  • @Angel_the_Bunny
    @Angel_the_Bunny Год назад

    Something about your videos is like crack for my senses. So good.

  • @goober-ll1wx
    @goober-ll1wx Год назад

    I wish I were as smart as you, fascinating as usual!

  • @tnts999998
    @tnts999998 Год назад

    You are on fire since some days! Please continue :)

  • @pomonabill220
    @pomonabill220 Год назад

    You always get the neat toys!!!!

  • @alexscarbro796
    @alexscarbro796 Год назад

    Could the PTFE based PCB instead be chosen for low moisture absorption?

  • @Momchil0
    @Momchil0 Год назад +1

    Long video = good
    30-90min is perfectly fine

  • @lostlullo
    @lostlullo Год назад

    Nice graphic portal reference :)

  • @arthurdent8091
    @arthurdent8091 Год назад

    Impressive. I only wish I knew how, where, and why to use such a complex piece of tech.

  • @Condurafly
    @Condurafly Год назад

    Looking forward to the video based on the research of my alma matar

  • @Hiasibua
    @Hiasibua 4 месяца назад

    20:03 missed 'Repslica' opportunity 😢

  • @l3VGV
    @l3VGV Год назад

    Yes, please!

  • @t1d100
    @t1d100 Год назад

    I have no knowledge regarding tin whiskers, other than knowing that they can occur... So, this suggestion might not be a good solution... But, let's give it some consideration... How about applying tinning solution to the accessible portions of the effected component? Might that bond to the metallic surface and serve as a sealant, without trapping heat?

  • @nickcaruso
    @nickcaruso Год назад

    precision adventure time!

  • @roboman2444
    @roboman2444 Год назад +1

    Isolated solder iron = torch + piece of metal. Don't you have a ts100 and a battery that could've been used?

  • @rahulkushwaha9500
    @rahulkushwaha9500 Год назад

    can you make a tutorial on how to properly use the falstad circuit simulator. I guess you are the only one I have seen using that sim on youtube or anywhere else.

  • @VaZZoN
    @VaZZoN Год назад +7

    3rd video in 4-5 days ❤

  • @darrenconway8117
    @darrenconway8117 6 месяцев назад

    I have a Wavetek 2520 Gig Gen. Looks a lot like it was designed by a committee of committees.

  • @PlaywithJunk
    @PlaywithJunk Год назад +1

    I like your EPROM eraser...

  •  Год назад

    Electrically illiterate me learned what is hermetically-sealed resistors are today. Thanks.

  • @sarahjrandomnumbers
    @sarahjrandomnumbers Год назад +1

    29:00 Let it be known throughout the land that this was the moment when I stopped saying the word "tantalum" again, and instead, said "Tantrum".

  • @douro20
    @douro20 Год назад +3

    The 1281 makes a 3458A look very simple in comparison.

  • @andymouse
    @andymouse Год назад

    Awesome !....cheers.

  • @geemcd
    @geemcd Год назад

    ❤ for Lemongrab x

  • @gbclab
    @gbclab Год назад +1

    Wow😊

  • @molitovv
    @molitovv Год назад

    I always watch you videos and love them but I must admit, I have no idea why someone would need such accurate standards or measurement. What are these things for?

    • @chefchaudard3580
      @chefchaudard3580 Год назад +1

      Calibration rooms, basically. Where multimeters and other measurement equipments are calibrated.
      It makes checking and setting up the test bench easier, as references are directly displayed in Ohms, Volts, Amps, rather than reading and doing calculations on resistor boxes, battery or whatever standard references are used.
      This also can be automated by connecting the multimeter to a computer.

    • @molitovv
      @molitovv Год назад

      @@chefchaudard3580 Thank you

  • @OmarMekkawy
    @OmarMekkawy Год назад

    Oh no, here we have our entertainment for 32 minutes :D

  • @reedreamer9518
    @reedreamer9518 Год назад

    Romancing the PPM's - its a nice hobby if you can afford it.

  • @Dragonmastur24
    @Dragonmastur24 Год назад

    and silver does whiskers too!

  • @friedtomatoes4946
    @friedtomatoes4946 4 месяца назад

    That is nuts I have given presentations at ETH Zurich

  • @mikelemon5109
    @mikelemon5109 Год назад +8

    27:30 *Trumpets start playing* " Auf der heide blut ain kleiness bluemelein... Und das heist: Erika"

  • @tobimai4843
    @tobimai4843 Год назад +1

    The cutouts on the LTZ board look sus

  • @steubens7
    @steubens7 Год назад +1

    dungeon. one million years dungeon

  • @abacabdk3490
    @abacabdk3490 Год назад +1

    If it's not broken, fix it until it is!

  • @x1000plusx
    @x1000plusx Год назад

    20:54 the laughing desoldering tool is not real, it cant hurt you

  • @milk-it
    @milk-it Год назад

    30 minutes does a justice to such devices. Lots of things learned and discovered!

  • @GroovThe
    @GroovThe Год назад +1

    Was 20:57 a Feel Good Inc. reference?

  • @ghydda
    @ghydda Год назад

    I am disappointed - either Marco failed at reverse engineering the circuit @29:43 - or at least he failed to comment on the very very very unusual configuration Q101-Q104 have been configured in.
    I demand an explanation.
    Otherwise, ❤ the vid'.

  • @juliannesermon8057
    @juliannesermon8057 Год назад +1

    Got startled by your desoldering pump, sounds like it's saying "Hallo" over a less than optimal analog radio connection.

  • @Olli120
    @Olli120 Год назад +13

    28:02 The circuit board of tolerance, right there. 🙈

    • @reps
      @reps  Год назад +6

      that is great play of words, I might have to steal that if there's another opportunity

  • @VEC7ORlt
    @VEC7ORlt Год назад

    I'll be calling voltage measurement competitive voltnutting from this point on.
    TL431 has been sacrificed on the altar of PPMs.

  • @cambridgemart2075
    @cambridgemart2075 Год назад

    Heatshrink Solder Sleeves are approved for military and aerospace use, so don't dismiss them so quickly!

  • @Zettymaster
    @Zettymaster Год назад +1

    3 videos in one month... Marco, are funds running low? Are you OK?

  • @AndersEinarHilden
    @AndersEinarHilden Год назад

    I had to think thrice when you said 18 years (recorded in 2018?) but then I remembered the 5 years. 2000+5+18=2023.

  • @rorywilliams5131
    @rorywilliams5131 Год назад

    "The LTZ1000 was continued in to the 8508A multimeter " . Are you sure about that , my dear friend ?

    • @reps
      @reps  Год назад

      Pretty high confidence in that statement pasteboard.co/G60gzQlQbIaZ.jpg Although maybe only early models?

  • @FryChicken
    @FryChicken Год назад

    Make a Multimeter Tier List

  • @shazam6274
    @shazam6274 Год назад

    New phrase / song for you: "Every Electron is Sacred"
    to the music from: Monty Python's "The Meaning of Life"

  • @legobuildingsrewiew7538
    @legobuildingsrewiew7538 Год назад

    FINALLYHHHH

  • @nrcha
    @nrcha Год назад

    Now that you have explained it, I can …

  • @Zadster
    @Zadster Год назад

    [Heavy Breathing Intensifies meme]

  • @thecatofnineswords
    @thecatofnineswords Год назад

    It’s a tool for calibration calibration tools. My goodness.

  • @nickylarsen6207
    @nickylarsen6207 Год назад

    sadly, that ltz1000 board will demonetize the video...

  • @heronguarezi6501
    @heronguarezi6501 Год назад

    this was an open heart surgery with the patient still alive

  • @bootlegcaesar7481
    @bootlegcaesar7481 Год назад

    27:49 Sussy pcb

  • @paradiselost9946
    @paradiselost9946 Год назад

    we like BIG CRISPY FAULTS SO WE CAN REMOVE THEM AND MIRACULOUSLY FIX EVERYTHING!
    one can only dream of such an idyllic existence...

  • @StefsEngineering
    @StefsEngineering Год назад

    Yeah intermittent sucks. I'd rather install a couple new multifunctional smoke generators.

  • @zyzzyva303
    @zyzzyva303 Год назад

    Cliffhanger ...

  • @hinz1
    @hinz1 Год назад +1

    Too many PLDs in there, just like HP3458 has one too many U180.
    Not good for your wallet/sanity, if something breaks.

  • @jayjwin1178
    @jayjwin1178 Год назад

    32min, has no clue. but watched till the end.

  • @razhterize
    @razhterize Год назад

    damn, seconds after public :woke:

  • @k9elli
    @k9elli Год назад

    rep rep

  • @getsomeknowledge5507
    @getsomeknowledge5507 Год назад +1

    First viewer 🎉