Fluke 732A DC Voltage Standard & low cost DIY attempt

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Flex or FR4, get your advanced PCBs from www.pcbway.com/setinvite.aspx...
5% off Brymen & Siglent w/ coupon 'marcoreps5' www.welectron.com/
Miniware LCR tweezers www.banggood.com/custlink/vDv...
Thermal imager www.banggood.com/custlink/Kvm...
Stereo microscope www.banggood.com/custlink/KmG...
Exclusive videos sometimes on / marcoreps
IanScottJohnston transformer anatomy • No.061 - HP 3457A DMM ...
Massively simplified 732A Falstad sim tinyurl.com/yzcvd2pn
LTZ1000A Falstad sim tinyurl.com/yj8tvqjo
Has cool stuff other than feedthroughs / gigabecquerel
Alternative hermetic feedthrough pins: Tusonix / CTS 4300
Mu metal cans de.rs-online.com/web/p/audio-...
0.2 ppm/°C VSMP resistors de.rs-online.com/web/c/passiv...
R-Core transformer s.click.aliexpress.com/e/_Aq6SMY
Wavetek 7000 EEVblog forum www.eevblog.com/forum/metrolo...
Schroff RatiopacPRO AIR schroff.nvent.com/en-de/produ...
LTZ1000 tests with various 'above' resistors snapshot.raintank.io/dashboar...
A few days in the life of 732A snapshot.raintank.io/dashboar...
Fluke 5700A cal check logs github.com/marcoreps/5700A/tr...
LTZmu stats w/ imbalanced batteries snapshot.raintank.io/dashboar...
LTZmu project WIP github.com/marcoreps/LTZmu
00:00 Intro
02:01 Fluke 732A
02:55 732A battery
04:35 732A guarding
06:00 732A pre-regulator
07:32 732A ref assembly
09:11 732A thermals
10:42 732A 'fixes'
12:06 732A heater circuit
12:42 732A ref circuit
14:31 LTZmu 10V standard
15:33 LTZmu-metal cans
16:08 LTZmu SMD resistors
17:00 LTZmu flex PCBs
18:49 LTZmu assembly
20:23 LTZmu concepts
23:20 LTZmu surroundings
26:46 LTZmu circuit
27:48 Wavetek 7000
32:16 732A results
34:07 LTZmu no results yet

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Опубликовано:

25 июн 2024

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Комментарии : 473

@LOOKMUMNOCOMPUTER 2 года назад

im pretty sure i can make that circuit bend a little worse if you want me too hahaha. :D.

@In3xorable 2 года назад

Awesome to see you here! I have been watching reps and look mum no computer for years now! The reference made me smile. Hope to see you here again!

@AppliedCryogenics Год назад

They should make VFD displays that have 16-segment Pagan runic font... Just for you, my friend.

@ursanotsomajor 3 года назад

The "look mum no computer" reference at 10:50 got me good 😁

@Tjousk 3 года назад

Indeed

@pyroman590 3 года назад

I laughed way too hard at that!

@sydneybiscuit 3 года назад

right? shots fired 😂😂😂

@DouglasFish 3 года назад

funny enough LMNC music played in Furze's video yesterday

@pyroman590 3 года назад

@@DouglasFish Ha! We noticed that too!

@IanScottJohnston 3 года назад

I got a mention!....whoop whoop!

@klausluger7671 3 года назад

I'm sure that jump in voltage in 2020 was just a coincidence, it was otherwise such an excellent year

@w04h 3 года назад

It was probably just a... Fluke 😎

@transkryption 3 года назад

@@w04hparasites? flukes? in the liver? ewwww!

@jensknudsen4222 2 года назад

2020: The Year the Voltage Standards Went Crazy!

@johnshaw359 2 года назад

@@jensknudsen4222 2020: The year everything went crazy.

@TheMcSebi 3 года назад

my dear god the 9v and the 1.5v battery in series killed me

@andrean_7725 3 года назад

10.5V is way to low to be harmful, I smell you're lying!!

@Anvilshock 3 года назад

@@andrean_7725 What if he choked on it?

@peterfitzpatrick7032 3 года назад

Eating the vintage foam was a nice touch... 😋

@power-max 3 года назад

@@andrean_7725 apparently some marine or sailer guy managed to kill himself with a multimeter on continuity check powered by a 9V battery by shoving the probes under his skin. 🤦‍♂️

@wesleymays1931 3 года назад

@@power-max _What?!_

@illusivec 3 года назад

As someone who doesn't care about any number after the dot in his £10 Chinese voltmeter, I applaud your dedication to getting the 10th decimal of your instruments right

@flantc 3 года назад

To calibrate a voltage reference you need two additional voltage references that you rub together in an alternating pattern until they are all with in spec.

@boobrowsky Год назад

🤣

@dirtdart81 6 месяцев назад

That is a niche joke but goddammit it is my niche 😂😂

@josefonseca9178 3 года назад

I know Marco, your knowledge about electronics scares me, sometimes. "look mum no computer" was very funny tho. Very nice video.

@nickstanley5064 3 года назад

Finally, my favourite volt-nut is back.

@danielmelendrez1616 3 года назад

- "Oh snap! Marco uploaded a new video. Imma watch it!" - Excuse me, we are in the middle of a Zoom meeting... - I know. See ya later! *leaves call* - ...

@PCBWay 3 года назад

As always, a stellar job, Marco! More to come pls! 🎉

@pitushi 3 года назад

Reps Precision Group !!!

@rachmatriyanto7057 3 года назад

maybe RPG-1000 its great product name

@elektronikzmbrtlar1586 3 года назад

Gods have blessed us. All hail the marco gods

@hermannpaschulke1583 3 года назад

That capacitor tweezer is cool :D

@wesleymays1931 3 года назад

They're called the Miniware DT71. They look great but they have a couple design oofs

@deviljelly3 3 года назад

Nice to have the Electronics "Bernd das Brot" back with another wonderful video.

@normanmacdonald9411 3 года назад

That's my new favourite description for this channel...

@deviljelly3 3 года назад

@@normanmacdonald9411 "Mist..."

@deviljelly3 3 года назад

@@normanmacdonald9411 or... "Bernd das Widerstand"

@Anvilshock 3 года назад

> "10-V source" > "9V+AA" Oh God no

@wesleymays1931 2 года назад

I mean... who cares if you're off by 5%

@666Tomato666 2 года назад

@@wesleymays1931 oh, you just need to slightly discharge the AAA and you're golden!

@someone8944 2 года назад

@@666Tomato666 ESR: no

@thiagoennes 3 года назад

the look mum no computer reference made me spill my coffee.

@gideonwackers7693 3 года назад

I kept it contained but it did get into my nose

@K.D.Fischer_HEPHY 3 года назад

That came out of nowere, yeah. To be fair, Marco and Sam are both very interesting individuals with a unique skillset.

@thedreadedone 3 года назад

as he flipped the board over i said "huh, looks like more like a syn-" then he referenced sam and i had to pause the video and sweep for bugs again.

@thiagoennes 3 года назад

LOL , i like both channels for VERY different reasons

@keanumack3944 3 года назад

„Still hasn’t recovered from being assembled 7days ago“ killed me

@wesleymays1931 2 года назад

So that's why babies just cry all the time

@hypercomms2001 3 года назад

Memories!! I used to sell Fluke test equipment... and I very much remember the launch of the Fluke 5700 calibrator. That was 1988... man! How time has flown! I remember selling a 5700 to Siemens after I went to their office in Bayswater, Victoria on a "fishing trip" with a Fluke and Philips catalog prospecting for names and opportunities and six months later got this massive order for Fluke Calibration equipment.....

@matt_gillard 3 года назад

I was just thinking about this channel. Hope the updates are further apart due to you being good busy and not anything else. We all got day jobs and I appreciate the extra effort to post these vids.

@ikocheratcr 3 года назад

Those censored holes, really made my day... Love the gems you put in your videos. All the info is serious, also love it.

@pyroman590 3 года назад

I loved the "look mum no computer" reference! I about spit out my coffee!

@thedanyesful 2 года назад

It's amazing that you put so much work into these videos while consistently demonstrating your sense of humor. This is some of the best content on RU-vid.

@greg4367 3 года назад

Technically fascinating, hysterically funny. Bravo my friend.

@angelosntimtsas2201 3 года назад

By far the most interesting RU-vid channel regarding electronics, with a great sense of humour! I always learn something new and actually you gave me a wonderful idea for my next project with the flexible PCBs! Keep it up Marco!! 😉

@annelisemeier283 3 года назад

The Saddam under your DIY reference had me dying

@izzieb 3 года назад

10:49 Savage!

@trevorhaddox6884 3 года назад

He's German. He has to deliver bombshells to the Brits. XD

@draco_2727 2 года назад

Marco, I have zero, I repeat, ZERO idea what's going on here but your content, your knowledge and humor is GREAT! I can only wish I knew half of electronics as you do 🙌

@jensknudsen4222 2 года назад

Electrical engineer: The leakage current through these six layers of top grade insulation material is surely negligible. Metrologist: Can we talk about that for a minute?

@schmetterling4477 2 года назад

The metrologist wins this one hands down.

@anthonyjobson 3 года назад

LMAO! That foam to cake transition had me!!

@pistolgamer4 3 года назад

He's back

@NS-no1li 2 года назад

Thank you for my daily dose of German humour and test instrument repair and rework.. Always good

@zxborg9681 Год назад

Super interesting, both the old Fluke and your DIY implementation. Love videos like this!

@satansoft 2 года назад

Your genius videos teach me a lot about electronics and humility ! As both qualified master electronic technician and master electrician your knowledge exceeds mine by far.

@BogdanO45 2 года назад

Great to see you posting again. Witty, funny and informative as usual.

@jessewigfield9704 3 года назад

Just an amazing video!!!! I can’t wait to make my own hermetic reference. Thank you so much Marco.

@jamiejoker118 2 года назад

Way over my head of electronics but love watching your work

@kingofcastlechaos Год назад

My coworkers asked me what the last video I watched was (this one), and they have promised to never ask again. Thank you for compelling content and actual humor.

@N1gel 2 года назад

Great. Such a niech subject but so well thought through and executed and video produced perfectly. Thank you, well done.

@lapissea1190 2 года назад

I understood a few words in this video. I still found it entertaining. You sir have some kind of magic

@edgeeffect 3 года назад

I just bodge up microcontroller circuits on stripboard.... so it's such a delight to watch an artist at work like this.

@eamondo2 3 года назад

The man, the legend, has returned!

@georgeashmore9420 2 года назад

I wish I understood more of this but it's so interesting to see such high precision engineering

@Ratkill 2 года назад

I come for the information but stay for the humor and editing. Top tier stuff.

@Vykyification 3 года назад

I just love this channel so much!

@nikmilosevic1696 3 года назад

Epic video, well worth the wait!

@mlab3051 3 года назад

I love high engineering detail video like this. It's good for my engineering mind.

@theovannieuwenhuizen5756 3 года назад

Thank you so much for yet an entertaining and informative video. I love your strive for excellence.

@michaelathens953 Год назад

I love the aesthetics of those old resistors, they remind me of the ones in my old guitar amps. They're just retro and funky and cool.

@Slartibartfas042 Год назад

I literally love that kind of humour! 😆 Great job done and this videos are worth to be watched even after years! Keep on and BIG THANKS, Marco

@lmamakos 3 года назад

I must drop everything to watch this latest PPM hunt!

@codingmarco 3 года назад

Yes, the 3458A self cal would be an interesting topic for a video! I also noticed these (very small) jumps and it would be interesting to learn more about them :)

@Emre-Sunay-Gebes 2 года назад

i dont understand and keep up with the things you mentioned (around 15% understood) but loving to watch till the end. soo dense and informative! and also fun! thanks for your great videos

@yt4krist0f 2 года назад

Nowadays I enjoy to watch such content for 30 minutes much more than any TV series... :-)

@XenXenOfficial 2 года назад

7:58 He ate the forbidden brownie

@keitmitkeit 3 года назад

the animation and graphics are just on point :D

@TechGorilla1987 3 года назад

@9:51 - RE silicone heating mats - back when I was an electrician, we used a series of Greenly silicone heating mats to soften and bend plastic conduit for service installation. Mid 90's probably.

@LetsPlayKeldeo 2 года назад

I dont unddrstand about 98% what you talking about but I could watch you solder and repair stuff every day all day long

@bigben747400 3 года назад

I really missed that humor, been quite a while but the wait was well worth it. By the way: (Excuse me if you already know that) Last open door day at the PTB they were calibrating instruments for free. Still got contacts there, so just reply if you are interested and i´ll try to find out for you, if they´ll do it again next open door day. Then again you do´nt seem to have any problems getting the job done yourself :-)

@shantk7378 3 года назад

I absolutely love this.

@fullwaverecked 3 года назад

Man, my seance of humor is no laughing matter as well. Good on you. Cheers from Utah!

@ryanmalin 3 года назад

Thanks for explaining leakage current across "isolation" transformers.

@originaltonywilk 2 года назад

Very interesting. Liked your A+,B,C,D binning labels :)

@tomkzinti2760 2 года назад

I actually took the time today to put a Like on every one of your videos, because they are WORTH IT. You put out very very decent videos filled with entertainment and factual, professional work that is both interesting and accurate. Good on ya, mate. Here's a few ppm's for your effort. . . . . . . . . . . .

@boltonky 3 года назад

5 mins in and this reminds me of talking to my mate about engineering stuff...i get lots of it but eventually it goes over my head. I need more practice and cool machines to test on

@TeslaTales59 3 года назад

Excellent selection method!

@Betterstartnow 2 года назад

Pilgrimage and on-site camping...love it!

@che1602 3 года назад

This video made today a good day!

@MegaEierfeile 3 года назад

Return of the king.

@NNNILabs 3 года назад

"ship to my friends all over Europe" That one Indian guy: 😢

@uditkotnis7531 2 года назад

And the 45 degree oven temperature.

@barmetler 3 года назад

You make me feel so inadequate XD It's still very entertaining and interesting what you do

@lancelink88 3 года назад

Please more Fluke gear, I love it!!!

@reps 3 года назад

same tbh

@NaudioElectronics 3 года назад

Damn good idea and project. Respect!

@lovedeathhatepoison8737 Год назад

I fucking love your content you can make a 365 hour video and I would still see every second of it

@milomitchener4166 Год назад

3:12 you just earned my subscription lol. love to see some safe and legal thrills

@tiemanowo Год назад

10:54 This reference was priceless!

@fullwaverecked 3 года назад

Had to watch it five times just to get half the laughs by half... Thank you.

@Sherwin657 2 года назад

I have no idea what's going on but I like watching you build stuff

@Max_Marz Год назад

Wrapping that mu metal can with the heater was so satisfying, goodness.

@israelgiron9089 2 года назад

Respect Marco!

@albinomonki 2 года назад

I would love to see a video about your data collection setup and work flow. Very interested in grafana, and would enjoy seeing how you capture and curate all your data points.

@michaelhartley8426 2 года назад

Missed your latest videos. No notifications from RU-vid GRRRRRRR. Thank you. Be well.

@andymouse 3 года назад

Lot's to think about, great vid !...cheers.

@Juanpavz 3 года назад

That's so pleasant for electronic engineers.

@shaneintegra 2 года назад

No idea why I watch this as I have no idea how any of it works even though I want to... But can't stop watching lol

@mohinderkaur6671 3 года назад

Great work!

@joe1569 2 года назад

Well done video.

@frosty129 2 года назад

Thumbs up before I watch, but Marco please post more often. Quantity over quality. Everything you do is interesting.

@supercompooper 3 года назад

I learn so much from you 🤗

@supercompooper 3 года назад

... mainly your comedic techniques 😜

@Toleich 3 года назад

Love these videos.

@TomKappeln 2 года назад

I really want to see him repairing a toaster ! Pretty sure he could 3D print a "toast Hawaii" after the repair ... ^^

@JohnUsp 3 года назад

Very easy, super easy. ;) LOL... Congrats man... keep these awesome videos.

@nyceyes 2 года назад

Excellent. I enjoy this (these) projects. I vote for a repair video, but I enjoy all them. ☺️

@erdem-- 3 года назад

I fell over from my chair when he said weird flex but ok! LOL this channel is just a masterpiece.

@freedomspeech9523 2 года назад

"10 Volt source" - and then shows two batteries wired in series (@ 1:01) I was laughing by myself like a crazy person!

@D.Axtmann 3 года назад

This video is a surprise, to be sure, but a welcome one :D

@MoritzBiester 3 года назад

Ah yes. Electronics and the finest mimis. Thats gonna be good.

@electrofan7180 2 года назад

I'm sure this guy is reptiloid from Alpha-Centauri. His tech skills are beyond this planet.

@InssiAjaton 2 года назад

Sometime in the 1960's (I believe) Philips published a design brief about an ovenized reference voltage source that was built around two zener diodes. Or actually one avalance type (positive tempco) and one zener type (negative tempco). Additionally there were several resistors. In short their idea was based on utilizing an avalance type (higher voltage) diode as the pre-regulator and the lower voltage (zener) as the output stage. Besides selected nominal voltages, they trimmed the resistors to provide an optimal current and thereby a good compesation. I myself remember building a 10 V reference from a 1N825 temperature compensated zener that to my understanding consisted of one zener and two silicon diodes in in series inside an ordinary (DO-35?) package plus my added op-amp. I also at first made a mistake that prevented a start-up. Needed an additional bias resistor for correcting that.