Fluke 732A DC Voltage Standard & low cost DIY attempt

День тому

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

КОМЕНТАРІ: 472

@LOOKMUMNOCOMPUTER 2 роки тому

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

@In3xorable Рік тому

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 Рік тому

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

@ursanotsomajor 2 роки тому

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

@Tjousk 2 роки тому

Indeed

@pyroman590 2 роки тому

I laughed way too hard at that!

@sydneybiscuit 2 роки тому

right? shots fired 😂😂😂

@DouglasFish 2 роки тому

funny enough LMNC music played in Furze's video yesterday

@pyroman590 2 роки тому

@@DouglasFish Ha! We noticed that too!

@TheMcSebi 2 роки тому

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

@andrean_7725 2 роки тому

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

@Anvilshock 2 роки тому

@@andrean_7725 What if he choked on it?

@peterfitzpatrick7032 2 роки тому

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

@power-max 2 роки тому

@@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 2 роки тому

@@power-max _What?!_

@IanScottJohnston 2 роки тому

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

@klausluger7671 2 роки тому

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

@w04h 2 роки тому

It was probably just a... Fluke 😎

@transkryption 2 роки тому

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

@jensknudsen4222 2 роки тому

2020: The Year the Voltage Standards Went Crazy!

@johnshaw359 2 роки тому

@@jensknudsen4222 2020: The year everything went crazy.

@illusivec 2 роки тому

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 2 роки тому

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 Рік тому

🤣

@dirtdart81 4 місяці тому

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

@josefonseca9178 2 роки тому

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

@nickstanley5064 2 роки тому

Finally, my favourite volt-nut is back.

@hermannpaschulke1583 2 роки тому

That capacitor tweezer is cool :D

@wesleymays1931 2 роки тому

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

@PCBWay 2 роки тому

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

@danielmelendrez1616 2 роки тому

- "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* - ...

@pitushi 2 роки тому

Reps Precision Group !!!

@rachmatriyanto7057 2 роки тому

maybe RPG-1000 its great product name

@thiagoennes 2 роки тому

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

@gideonwackers7693 2 роки тому

I kept it contained but it did get into my nose

@K.D.Fischer_HEPHY 2 роки тому

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

@thedreadedone 2 роки тому

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 2 роки тому

LOL , i like both channels for VERY different reasons

@deviljelly3 2 роки тому

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

@normanmacdonald9411 2 роки тому

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

@deviljelly3 2 роки тому

@@normanmacdonald9411 "Mist..."

@deviljelly3 2 роки тому

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

@Anvilshock 2 роки тому

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

@wesleymays1931 2 роки тому

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

@666Tomato666 2 роки тому

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

@someone8944 2 роки тому

@@666Tomato666 ESR: no

@hypercomms2001 2 роки тому

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 2 роки тому

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.

@elektronikzmbrtlar1586 2 роки тому

Gods have blessed us. All hail the marco gods

@pyroman590 2 роки тому

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

@ikocheratcr 2 роки тому

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

@keanumack3944 2 роки тому

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

@wesleymays1931 2 роки тому

So that's why babies just cry all the time

@thedanyesful 2 роки тому

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 UKposts.

@izzieb 2 роки тому

10:49 Savage!

@trevorhaddox6884 2 роки тому

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

@zxborg9681 11 місяців тому

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

@jessewigfield9704 2 роки тому

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

@angelosntimtsas2201 2 роки тому

By far the most interesting UKposts 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!! 😉

@greg4367 2 роки тому

Technically fascinating, hysterically funny. Bravo my friend.

@N1gel 2 роки тому

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

@codingmarco 2 роки тому

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 :)

@theovannieuwenhuizen5756 2 роки тому

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

@jonsighvatsson12 2 роки тому

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.

@annelisemeier283 2 роки тому

The Saddam under your DIY reference had me dying

@draco_2727 2 роки тому

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 🙌

@BogdanO45 2 роки тому

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

@georgeashmore9420 2 роки тому

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

@michaelathens953 Рік тому

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.

@Elastane 2 роки тому

36 minutes of marco reps and some fabulous tech, nice :D

@Slartibartfas042 Рік тому

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

@edgeeffect 2 роки тому

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

@Emre-Sunay-Gebes 2 роки тому

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

@lapissea1190 2 роки тому

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

@Vykyification 2 роки тому

I just love this channel so much!

@nikmilosevic1696 2 роки тому

Epic video, well worth the wait!

@TechGorilla1987 2 роки тому

@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.

@jensknudsen4222 2 роки тому

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 роки тому

The metrologist wins this one hands down.

@albinomonki 2 роки тому

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.

@anthonyjobson 2 роки тому

LMAO! That foam to cake transition had me!!

@mlab3051 2 роки тому

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

@pistolgamer4 2 роки тому

He's back

@keitmitkeit 2 роки тому

the animation and graphics are just on point :D

@shantk7378 2 роки тому

I absolutely love this.

@eamondo2 2 роки тому

The man, the legend, has returned!

@boltonky 2 роки тому

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

@Ratkill 2 роки тому

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

@ryanmalin 2 роки тому

Thanks for explaining leakage current across "isolation" transformers.

@kingofcastlechaos Рік тому

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.

@TeslaTales59 2 роки тому

Excellent selection method!

@NNNILabs 2 роки тому

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

@uditkotnis7531 2 роки тому

And the 45 degree oven temperature.

@bigben747400 2 роки тому

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 :-)

@tomkzinti2760 2 роки тому

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. . . . . . . . . . . .

@lmamakos 2 роки тому

I must drop everything to watch this latest PPM hunt!

@NaudioElectronics 2 роки тому

Damn good idea and project. Respect!

@originaltonywilk 2 роки тому

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

@israelgiron9089 2 роки тому

Respect Marco!

@yt4krist0f 2 роки тому

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

@NS-no1li 2 роки тому

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

@jamiejoker118 2 роки тому

Way over my head of electronics but love watching your work

@Sherwin657 2 роки тому

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

@michaelhartley8426 2 роки тому

Missed your latest videos. No notifications from UKposts GRRRRRRR. Thank you. Be well.

@InssiAjaton 2 роки тому

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.

@che1602 2 роки тому

This video made today a good day!

@fullwaverecked 2 роки тому

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

@mohinderkaur6671 2 роки тому

Great work!

@Betterstartnow 2 роки тому

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

@SpinStar1956 2 роки тому

Really have enjoyed the deep-dives on the voltage references. Great work on the flex-PCB. I’d like to see a resistance standard. Looks like you were having a problem with the ‘Uden-Pucky’ at the end there! 😅🤣😅

@joe1569 2 роки тому

Well done video.

@andymouse 2 роки тому

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

@frosty129 2 роки тому

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

@Max_Marz 11 місяців тому

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

@excitedbox5705 2 роки тому

Using ceramic insulation would give you more stable temps because of the low thermal transfer. You can use brazing to hermetically seal those feet and it will draw solder in. Just use plenty of solder paste around the side of the feet and stick in the hole. Heat the housing and paste and as it cools it will draw in the solder as it hardens.

@TomKappeln 2 роки тому

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

@MegaEierfeile 2 роки тому

Return of the king.

@andrecarlos985 2 роки тому

Marco I hope you are right, with all the floods going on. Keep safe

@peterfitzpatrick7032 2 роки тому

I particularly liked the part where you mentioned ppms.... 🙂 And its always nice to de-stress after a particularly challenging project by playing with some playdough... The "re-cycling" watersplash & mention of eels was nice.... I'm assuming they were electric eels ? 🤔 From the Emerald Isle 😎👍☘️🍺

@milomitchener4166 Рік тому

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

@Toleich 2 роки тому

Love these videos.

@lancelink88 2 роки тому

Please more Fluke gear, I love it!!!

@reps 2 роки тому

same tbh

@nyceyes 2 роки тому

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

@mnamnam6061 2 роки тому

Holy reflection, what ... , ahm let me ...., I mean ...., yeah was quite a bit of Information. There might be some extended heat in my sealed enclosure too, the one up top the shoulders. To cool down I gonna repair my newly aquired Stelltrenntrafo from anno dunnemals (some long time in the past), enjoying % with doubledigits. Echt Klasse was du da jedes Mal raushaust.