Fluke 5100B - Part 1

[@reps]

wow, nice one! I am working on one of these too

[@georgem6651]

Hah! Can't wait to see who does it better 😁

[@atkelar]

It's a small world at times 😆 - it took some time to find the fault in mine; I'm sure I went through just about any part of it several times over, with only few exceptions.

[@mikedfgfj]

5101B fell to me from the sky today. Many thanks for the hint with power dots for 240Vac switches, saved me hours of headache and lots of cash...

[@lwilton]

I've had a 5100B for many years. The only instrument that lives on it's base on the floor rather than on the bench. Holds down part of the crustal layer in my area to prevent earthquakes.

[@TeslaTales59]

Mr. Atkelar, you took on an enormous project! You may need to make this a 10 part series. Great work as usual sir.

[@janno288]

I am impressed how someone can not lose their sanity when working on something this complex and just starts replacing components without even powering it up first Hahaha! I respect your dedication, not just doing a restoration but also taking the time to use your character and recording all the voice lines! I wish you the best!

[@atkelar]

Thanks! I usually avoid power up until I have a clear insight into the device. Just so I can replace obviously faulty - and presumed faulty - components first, before they have a chance to take others with them. Especially with older devices that rely on no-longer-made parts.

[@matthiasjagdm3949]

4:39 not watch for long time and i am loving you describe your "assistant" as a different person

[@atkelar]

Practically, it's either that or "wear matching gloves" for the videos. But that would be... umm... clumsy and potentially dangerous if power tools or fire is invovled. So I chose to keep the lore of somebody doing the actual work for me, because paws need to be protected from harm and dirt! 😺

[@Derpy1969]

Come for the restoration. Stay for the puppet.

[@RetroTinkerer]

Damn you are a fearless kitty indeed, that looks like some complicated stuff, hope you find the perfect reference to calibrate your reference!

[@atkelar]

Proper "by the letters" calibration would need quite a few standards. But I'm sure that a modern 7.5 digit DMM that is up to date and calibrated would do just fine. Problem is: finding one of these for rent, because I don't need something like that around normally...

[@JoeMuc2008]

My respect to you Sir, I would have lost track of what goes where within minutes. What a majestic piece of kit. Hope you get it to a perfectly working state. Looking forward to the journey!

[@PapasDino]

A true "magical mystery tour"! Can't wait for part 2!

[@jspencerg]

Thanks!

[@atkelar]

No, thank you! ❤️

[@Pulverrostmannen]

Hey! I got one of these Unigor meters myself! Mine is the "Unigor 1P" Btw the Puppet master is at it again great work as always!

[@atkelar]

Unigor had quite a few meters back in the day. They were popular with schools, which is where I came into contact with the A43 one. I got it for nostalgia of "the first ever meter I used" back in 1991-ish. And thanks!

[@georgem6651]

Just made my Sunday watching this 🥹 Thabk you 😁

[@KeritechElectronics]

...and now let's try this once again just to see if it was not a Fluke! Lovely rebuild.

[@lulrik1]

good video ! love the device as much as the musics you choose

[@TheDefpom]

Welcome to the slippery slope of Voltnuttery, it’s a dark dark place 👍🤓

[@zyeborm]

He's already got a pretty cool accent, he's well on the path to the dark side 😂

[@msylvain59]

First time I see this design of "reversed" card edge connectors.

[@jspencerg]

Pulling pcbs: the hole in center-top of boards is there for a puller hook. You never hesitate for a complete disassembly! Fearless. Fluke issued change to reverse direction of fan. No filtering now. They realized there were cooling issues! Machine looks clean compared to mine. Perhaps the fault limited its use long ago? I'm looking forward to your tests. Thanks!

[@atkelar]

Hmmm... reverse direction compared to what? Mine came with the fan blowing out the back, which seemed odd, becuase it blows through the filter rather than sucking the air in. Is that the old or the new direction?

[@jspencerg]

@@atkelar Yours has been changed. The fan originally pulled through the filter. The filter now impedes flow and should not be used. I found the fan change document online.

[@andersvandegevel8355]

You don't need a capacitance meter to check capacitors; you can get usefully accurate results using a simple resistor and working out the RC time curve. The leakage is best measured with a sensitive ammeter once it's saturated and at the voltage you intend to operate it at. You can measure the ESR with an FG, a DMM, and a bit of Ohm's law cogitation

[@feicodeboer]

Man, how on earth do you remember how to put back all those parts?

[@atkelar]

The videos and pictures help a lot! 😊

[@marcwolf60]

Photo's.. :)

[@HainjeDAF]

@marcoreps are you watching this? I think you two could team up

[@TinkerLynx]

Just found your channel, loved this video. As a small request, I just wish the music was at a lower volume. It's a fairly common issue for youtube and me (I have a bit of hearing damage) where I have to have the volume hi to understand the narration but find music distracting and louder then comfortable. Anyway, I've subscribed and I'm looking forward to part two, but for now I'll go watch some of your older videos.

[@atkelar]

Thanks for the kind words! I'm afraid it's a bit difficult to put the music to a significantly different level than it is now; it is quite a few dB lower than the voiceover and since everybdoy's listening devices are inherently different, it's next to impossible for the creators to predict how something will sound "on the other side"... I might be able to tone it down a tiny bit more, but on my end it's at elevator music level compared to the voice over.

[@TinkerLynx]

Thanks. I'll manage, using headphone vs speakers just about solves it for me anyway.

[@YuriyKrivosheyev]

Great, thx! Then you’ll need a reference to calibrate a calibrator (as you mentioned already)… 😂

[@cornwallonline]

Purr-fect!

[@HK_808]

I recently got a fluke 8500 im trying to get running again

[@atkelar]

Oh! That looks like a nice meter! I have some similar ones in my pipeline, but they first need to make it through the mail. I love these old devices; one can still find schematics for those.

[@HK_808]

​@atkelar luckily it uses mostly standard 4000 series cmos logic. According to the calibration sticker mine was from sperry-univac originally

[@shawnhuk]

Ah, we see stagehand has a long grey beard! A clue!

[@atkelar]

The beard is still an experiment... not sure if/how long Stage Hand will keep that 😆

[@wall_k]

Huh, first time you can't make a lifesized cat modes out of the dust found inside

[@atkelar]

I have a theory on why this device was put away. That can line up with the relative cleanliness inside. I'll post that after part two though, need some pictures to go with it.

[@senilyDeluxe]

There's a chance these capacitors could outlast whatever you would have replaced them with.

[@FoxMccloud42]

And also on these type of equipment when you replace the caps, you need to recalibrate the hole unit, which can be costly.

[@atkelar]

Since it had some broken components, I have to do that anyhow ^^

[@atkelar]

I usually try to find "as close to original" ones as possible. In this case, the same lot of screw in capacitors from Sprague would have been a small fortune. I'm sure I could have found similar cheaper ones, but that would be a downgrade indeed.

[@ruawhitepaw]

@@FoxMccloud42 Calibrating the calibrator. Is it calibrators all the way down?

[@jspencerg]

@@FoxMccloud42 The need for recalibration depends on the specific function cap is used for.

[@leongyokeloong5083]

Is that a black cat?

[@atkelar]

Indeed. 😺

[@leongyokeloong5083]

@@atkelar very cute.

[@mikehughesdesigns]

High Electronics. For Kids!!!

[@atkelar]

While I like to see my work as "kid friendly" - it is certainly made for at least young adults. I'd rather not have kids work on mains voltage devices 😆