One thing JLC PCB knows (aside from memorable names) is that repeated sponsorship and no commercials is the way to get customers, I’ve seen them on a few channels and a few times, especially on your channel, and it’s now in my memory and frequently refreshed when you get sponsored and put out a video, the moment I need a pcb for something or anything they can do, they will be the first name in my head
As for why they fetch so much on Ebay; Because they're super useful, save a ton of time, and make for easier, smaller workbenches. There's also not a ton of vendors selling things that can do all a 2400 can do in one instrument. We work in solar PV cell testing (among other things) and using the SMU gets you the Source (and Load) and the M in once place. We just sent in a 2420 for re-calibration to build out some new test capabilities. For PV Cells, you can do diode curve traces (dark current measurement, as a programmable source), then park them in the sun and do the lit IV sweep (as a load) and then set your MPPT point under software control to load test them. Having a thing that doesn't really care what quadrant you operate it in is really handy for these kinds of jobs. Not a lot of people seem to do this kind of testing, though, so the supply/demand shifts towards "being more rare", hence the price increase. Also, as of now, the supply chain stuff is *madness*: We tried to order a new one for this project, and the 2450's are running multi-month leads, making it hard for us to schedule work.
I love this channel. Calibration and repair with humorous commentary takes me back. With over 40 years in calibration and repair until redundancy due to the virus, some of the ‘old’ equipment in your vlogs I can remember when new and ‘revolutionary’ 😉 Keep up the good work.
Fusion 360 saved me a lot of time when it was released with a free hobbyist license. But I always had the feeling it wouldn't last. Same as Sketch-Up before. We feast on crumbs that fall from corporate tables from time to time, but it's folly to depend on them in the long term.
In your opinion, what are the best free MCAD packages out there today? I have a semi-working knowledge of FreeCAD but I find it clunky and awkward. Anything more intuitive?
@@adbethsing383 I have no idea if there is a better free-to-use mcad package. I've never used any MCAD software enough to get beyond the feeling of clunkiness.
Totally agreed about cloud based software. I avoid it all in favor of open source and offline software. Don't always have connectivity to the internet, and if the company goes out of business or just decides to kill the product, you'd be SOL.
That goes for all cloud based hardware too - especially prevalant in the 'IoT' space. Company disappears, and all your happily working stuff becomes expensive paper weights in the blink of an eye. Never rely on "the cloud", as in reality it's just "someone else's computer"
Surprised to see a Keithley 2400 here! We still use this exact model daily in the lab. I think part of the high prices could be the number of custom software setups built around them. Upgrading to a newer SMU would require reworking software when the 2400 performance is already sufficient, so why bother upgrading?
It has but it has some quirks and does not perfectly respond the same to all commands (found it out the hard way). Luckily you can still buy the 2400, or the cheaper 2401 if you need no more than 21V.
I had the exact model till one week ago in my bench, last friday ai swapped it for 2420 for some extra four quadrant currents. These SMUs are the swiss knife of any electronics lab!
Wow, that's getting deep into the 2400. Back in the day I picked up some 2400-LV units which had diodes missing to disable the high voltage output range for safety, as they had been used in a low voltage setting. I bought in and installed the SM diodes to bring the high voltages back, and simply blacked out the LV letters on the model number printed on the display cover. We used to rack mount them so I must have ditched hundreds of those feet, brand new.
I used to use one of these in an old job. We were interested in measuring the volume/surface resistivity of certain polymers. They used to sell this with a test cell you could use to apply up to 1kv
Just wrote a driver for these. We tried using some 2400's once to dc bias a noise test once. What a nightmare. Ended up making a giant butterworth filter for it and still was crappy, while HP/aglient's e5270 from the same era was dead quite. But i guess for your Vt extraction or idvd curves it works fine.
I'm an assistant in a research institute where there aren't many people really doing electronics. So I get free range in the electronics lab. I'm a big fan of the 2400 there. I used it to make automatic measurements on a homemade sensor. I also get access to a 3458a, but I don't use it that much. We don't have anything that talks GPIB and the extra digits dont carry any useful info. I'll probably take advantage of it when I really get into volt nuttery.
I absolutely love your content. However... I'm a bit scared those ball bearings will find their way out of the holes eventually. My personal choice would have been to have the holes smaller and clamp the balls between the plate and the transistor, instead of the press fit. I wouldn't want you to have bearing balls rolling through the enclosure hugging IC pins...
Agreed, with many thermal cycles the balls may find themselves coming loose. A smaller countersunk hole or he could still countersink those holes and use larger balls. Admittedly it will be harder to assemble but the peace of mind that they will not fall out is worth much more imo.
@@st3althyone The peace of mind of selecting slightly bigger bearing balls far outweighs any risk of puffing out the magic smoke, however small the chance may be. And no, it's not just the heat (which definitely still is there), there's something called creep too.
Missed your grand electronic wizardry, along with that dry, quick, comedic wit which make your videos so entertaining to view! All the best to you friend.
Impressive work, equally impressive that you can purchase all those parts, one of the nice things about being in Europe I guess, unlike New Zealand where the freight would kill such endeavors.
Mr. hightechstuff isn't it?! Long time no see 😄 At first I was thinking about one of those automatic color-cycling LEDs, but I could only find them with weeks of delivery time from china ...
one downside of the red color - most of the reduced color sensitivity is red/green and it affects ~9% of the male population, in that case red is not so noticeable. Flashy color cycling would be a better one.
Oh well, I feel you... Transitioning from F360 to SE is definitely one thing I want to do before this year ends. I never even realized that SE offers a free version, till I read the article on HAD.
Your videos are so fascinating - I have no use for any of this info, but I keep coming back to watch the news ones. Your voice overs are A+ too! I studied electrical engineering at Cal Poly San Luis Obispo (the electronics track back in 1989 - but I never did anything with it) Thanks much for all your efforts and keep up the humor!
That's what I call service, wonderful work, such a video is a pleasure to watch. SMUs are wonderful machines, I also owned one, that is, only until my amateur laboratory was robbed, just like you, I do not understand the prices on Ebay, due to the fact that I am from the Czech Republic and the exchange rate of our crown will multiply the price even more, I probably won't buy another one . Nice day 🙂 Tom
Have been a humongous fan of your channel for years, but I must admit that I have not much of an idea of the specifics. I thoroughly enjoy the high tech cutting edge humor. Always a hoot! And educational... Cheers from Utah!
Not so many PPMs in this beast, but such an arduous journey they have been on. They need some campaign ribbons to commemorate all their lost component comrades.
You're the only person I know who uses Solid Edge besides my highschool robotics team who only uses it out of sponsorship obligations! Funny to see, it's very capable but not any better or worse than other popular cad suites, hope to see you find its quirks and features in the future
Either CNC'ing or geting an aluminum clad custom PCB for that shielding section shouldn't be too terrible, unless it contains some 4D orgami. Excellent repair job sir.
@9:00 I knew these when I was I kid, and I wanted one. One morning somewhere in the 90's I came out of my bed and heard this sound. I was sure I would get one of these. Instead It was our cat barfing on the floor... It made the same sound :(
Watching your content for witty entertainment as most of it is over my head. Thank you very much for that. I am intrigued by the idea of using PCBs, especially those aluminum-substrate ones, for labelling and signage. I feel this may be the time to finally install and play with KiCAD. Starting on non-functional parts does not seem as intimidating to me as making circuit boards that, you know, are supposed to actually work. Could you maybe share a simple design that demonstrates how to set up to specify areas exposing the different materials as you are hinting at starting around 21:50? Or explain it simply? Or point to a place that has information. Preferably suitable to infant-stage capabilities, although I am prepared to study :-).
Like the super-Vref project, your persistence impresses!!-Pretty sure I'd have given up Oh, I think they got the multi-rail idea from the popular audio amp config, 'Class G', that used (at least) 2 supply voltages in that some configuration, for power efficiency / high transient power
I’ve got a bench power supply that was thrown out also, but I’ve got no hope of doing what you did! aside from verifying the power portion, capacitor health, and diodes…. But since it’s junk anyway, can’t hurt to try.
I wonder what failure caused it to be condemned in the first place ? It seems like most of the work was in repairing subsequent damage. Maybe those warm DACs, or the constant resetting.
Awesome repair work. Would love to see how to reconditioned a VFD display as you described and thanks for the interesting explanation for the driver output stage with gliding voltage enable more MOSFET's that design could be used in a power economical class AB amplifier.
I tried using Solid Edge after I lost access to Siemens NX license, but it felt much worse. Now I got one year left of educational Fusion 360 license. I really hope they don't take away "for personal use" option.
I barely know enough to understand 60% of what this dude is explaining, but that's enough to understand the jokes. Omg... Next level stuff. Definitely not for all.
What is a "trojan op amp" and what are the boxes labelled A C+ C-? A normal op amp with bootstrapped supply rails would have a problem because its inputs are referenced to ground.
Regarding the replacement of polystyrene capacitors with silver-mica, I know that polystyrene capacitors are often chosen for measurement circuits because of their extremely low dielectric absorption (memory effect). This makes them very good as integrating capacitors, for example, despite the fact that they are an otherwise unassuming component. They are now regarded as largely obsolete because of polystyrene's very low melting point, which makes them incompatible with surface mount soldering processes. I have not found anything online regarding the absorption properties of mica. Are you certain that you aren't introducing unwanted memory effects by switching the polystyrene caps for silver-mica?
Hallo Marco, sehe du nutzt fleißig das Brymen 789, bin auf der suche nach einem anständigen Einsteigermultimeter und habe mir auch das Brymen EEVBlog 786 angesehen, natürlich würde mich ein 87V reizen aber ich denke das Geld kann ich mir für meine Zwecke sparen, bist du denn zufrieden? Oder würdest du noch was anderes empfehlen? Grüße
Awesome repair, looking forward to the cal procedure. Recently got a Metra MT100 nixie voltmeter at a flea market, so may I join the ppm and test equipment hoarding community!
I dont know any of these words, but I'm happy to be here.
Same lmao
I understand most of the words used, it is just the acronyms that confuse the hell out of me
Fantastic work! I bet this poor abandoned SMU is now the happiest one in the world.
Wow, that's a really impressive repair job. I would've written that thing off, respect for actually getting everything working again
WOW way to spoil the show..... 😉
@@tollav Pro tip: read the comments AFTER watching the video. :)
One thing JLC PCB knows (aside from memorable names) is that repeated sponsorship and no commercials is the way to get customers, I’ve seen them on a few channels and a few times, especially on your channel, and it’s now in my memory and frequently refreshed when you get sponsored and put out a video, the moment I need a pcb for something or anything they can do, they will be the first name in my head
As for why they fetch so much on Ebay; Because they're super useful, save a ton of time, and make for easier, smaller workbenches. There's also not a ton of vendors selling things that can do all a 2400 can do in one instrument. We work in solar PV cell testing (among other things) and using the SMU gets you the Source (and Load) and the M in once place. We just sent in a 2420 for re-calibration to build out some new test capabilities. For PV Cells, you can do diode curve traces (dark current measurement, as a programmable source), then park them in the sun and do the lit IV sweep (as a load) and then set your MPPT point under software control to load test them. Having a thing that doesn't really care what quadrant you operate it in is really handy for these kinds of jobs.
Not a lot of people seem to do this kind of testing, though, so the supply/demand shifts towards "being more rare", hence the price increase.
Also, as of now, the supply chain stuff is *madness*: We tried to order a new one for this project, and the 2450's are running multi-month leads, making it hard for us to schedule work.
I love this channel. Calibration and repair with humorous commentary takes me back. With over 40 years in calibration and repair until redundancy due to the virus, some of the ‘old’ equipment in your vlogs I can remember when new and ‘revolutionary’ 😉
Keep up the good work.
Fusion 360 saved me a lot of time when it was released with a free hobbyist license. But I always had the feeling it wouldn't last. Same as Sketch-Up before. We feast on crumbs that fall from corporate tables from time to time, but it's folly to depend on them in the long term.
In your opinion, what are the best free MCAD packages out there today? I have a semi-working knowledge of FreeCAD but I find it clunky and awkward. Anything more intuitive?
@@adbethsing383 I have no idea if there is a better free-to-use mcad package. I've never used any MCAD software enough to get beyond the feeling of clunkiness.
Those mains cycle sensing caps on the PCB are pretty clever. Neat trick
I literally said "that's clever" when he described it lol
TIL Solid Edge has a Community edition. Sounds like an extremely competitive offering in the non-commercial CAD market.
Glorious. So pleasing to watch. Very interested in seeing the calibration and testing. Many thanks.
Totally agreed about cloud based software. I avoid it all in favor of open source and offline software. Don't always have connectivity to the internet, and if the company goes out of business or just decides to kill the product, you'd be SOL.
the problem is open source and offline software needs to be *better*, and a lot of the time it isn't
That goes for all cloud based hardware too - especially prevalant in the 'IoT' space. Company disappears, and all your happily working stuff becomes expensive paper weights in the blink of an eye. Never rely on "the cloud", as in reality it's just "someone else's computer"
I have no idea what you are talking about, but I enjoy every minute of it.
The HD Silkscreen looks amazing!
Surprised to see a Keithley 2400 here! We still use this exact model daily in the lab. I think part of the high prices could be the number of custom software setups built around them. Upgrading to a newer SMU would require reworking software when the 2400 performance is already sufficient, so why bother upgrading?
I'm pretty sure the new touchscreen Keithley SMUs have a 2400 compatibility mode built in
It has but it has some quirks and does not perfectly respond the same to all commands (found it out the hard way). Luckily you can still buy the 2400, or the cheaper 2401 if you need no more than 21V.
With Marco, I believe it is to keep the stray PPM's in the unit and not let them excape.
I had the exact model till one week ago in my bench, last friday ai swapped it for 2420 for some extra four quadrant currents. These SMUs are the swiss knife of any electronics lab!
You bring so much joy to the world when you do these sort of videos. I admire your attention to details. THANK YOU!!!
Very impressive. I would have given up the repair job because of so many missing parts... Thank you a lot for this awesome repair video.
Great effort with the usual humour and high production quality. Thank you!
Your sense of humor is IMHO top-shelf. That makes me dignified audience, but probably not very smart 😂. I’m enjoying it all, for real. Keep it coming!
Wow, that's getting deep into the 2400. Back in the day I picked up some 2400-LV units which had diodes missing to disable the high voltage output range for safety, as they had been used in a low voltage setting. I bought in and installed the SM diodes to bring the high voltages back, and simply blacked out the LV letters on the model number printed on the display cover. We used to rack mount them so I must have ditched hundreds of those feet, brand new.
I used to use one of these in an old job. We were interested in measuring the volume/surface resistivity of certain polymers. They used to sell this with a test cell you could use to apply up to 1kv
Awesome video! Always a pleasure to see your videos
So glad to finally see someone else use Solid Edge!
Just wrote a driver for these. We tried using some 2400's once to dc bias a noise test once. What a nightmare. Ended up making a giant butterworth filter for it and still was crappy, while HP/aglient's e5270 from the same era was dead quite. But i guess for your Vt extraction or idvd curves it works fine.
Good job, Marco. Looking forward to the followup!
I'm an assistant in a research institute where there aren't many people really doing electronics. So I get free range in the electronics lab. I'm a big fan of the 2400 there. I used it to make automatic measurements on a homemade sensor.
I also get access to a 3458a, but I don't use it that much. We don't have anything that talks GPIB and the extra digits dont carry any useful info. I'll probably take advantage of it when I really get into volt nuttery.
AR488 - You have no excuse not to build one!
@@Drew-Dastardly Looks nice! I'll probably build one when I need to use the SCPI on GPIB only instruments.
I absolutely love your content. However... I'm a bit scared those ball bearings will find their way out of the holes eventually. My personal choice would have been to have the holes smaller and clamp the balls between the plate and the transistor, instead of the press fit. I wouldn't want you to have bearing balls rolling through the enclosure hugging IC pins...
Agreed, with many thermal cycles the balls may find themselves coming loose. A smaller countersunk hole or he could still countersink those holes and use larger balls. Admittedly it will be harder to assemble but the peace of mind that they will not fall out is worth much more imo.
The heatsink takes care of the heat coming off those components. There's no way those ball bearings are coming out.
@@st3althyone The peace of mind of selecting slightly bigger bearing balls far outweighs any risk of puffing out the magic smoke, however small the chance may be. And no, it's not just the heat (which definitely still is there), there's something called creep too.
I'd just put heatshrink around the bars.
A simple solid backing plate behind the plate with the balls in it would be a quick and simple fix.
Missed your grand electronic wizardry, along with that dry, quick, comedic wit which make your videos so entertaining to view! All the best to you friend.
That's the content I'm here for! Regarding the missing parts - I imagine someone combined two devices into one.
Impressive work, equally impressive that you can purchase all those parts, one of the nice things about being in Europe I guess, unlike New Zealand where the freight would kill such endeavors.
Nice work as usual.
23:34 Maybe a compression spring in there?
Many thanks, you're a great presenter. Appreciated.
I also wondered why not spring load them - afraid to make a contact with the metal parts?
23:40 the results justify your efforts 100%
Great repair job there! Glad to see it restored. That automatic supply rail selection circuit is really neat, too.
I love every single one of your videos, but every Keithley repair brings extra joy to my day. Thanks Marco!
This guy is on a whole other level.
Somehow, I knew you were going to go with red for the enable LED. Just to be different. The VFD on the 2400 is really fun with an AM radio near by. ;D
Mr. hightechstuff isn't it?! Long time no see 😄 At first I was thinking about one of those automatic color-cycling LEDs, but I could only find them with weeks of delivery time from china ...
one downside of the red color - most of the reduced color sensitivity is red/green and it affects ~9% of the male population, in that case red is not so noticeable. Flashy color cycling would be a better one.
SMUs are one of my favorite instruments ever. So useful for so many electronic devices.
Oh well, I feel you...
Transitioning from F360 to SE is definitely one thing I want to do before this year ends.
I never even realized that SE offers a free version, till I read the article on HAD.
Your videos are so fascinating - I have no use for any of this info, but I keep coming back to watch the news ones. Your voice overs are A+ too! I studied electrical engineering at Cal Poly San Luis Obispo (the electronics track back in 1989 - but I never did anything with it) Thanks much for all your efforts and keep up the humor!
Honestly, I'm enjoying to watch yours videos.
Alchemist - Turning junk into beauty - And in a soothing way!
That's what I call service, wonderful work, such a video is a pleasure to watch.
SMUs are wonderful machines, I also owned one, that is, only until my amateur laboratory was robbed, just like you, I do not understand the prices on Ebay, due to the fact that I am from the Czech Republic and the exchange rate of our crown will multiply the price even more, I probably won't buy another one .
Nice day 🙂 Tom
Have been a humongous fan of your channel for years, but I must admit that I have not much of an idea of the specifics. I thoroughly enjoy the high tech cutting edge humor. Always a hoot! And educational... Cheers from Utah!
Thank you for taking the time to create and upload this. Wells done.
Not so many PPMs in this beast, but such an arduous journey they have been on. They need some campaign ribbons to commemorate all their lost component comrades.
You're the only person I know who uses Solid Edge besides my highschool robotics team who only uses it out of sponsorship obligations! Funny to see, it's very capable but not any better or worse than other popular cad suites, hope to see you find its quirks and features in the future
Enjoyable as ever, my friend. Your content never fails to impress.
Either CNC'ing or geting an aluminum clad custom PCB for that shielding section shouldn't be too terrible, unless it contains some 4D orgami. Excellent repair job sir.
I barely understood less than half of this video, but it was incredibly fascinating to watch!
Excellent job and great repair video! 👍
This unit now is saved from scrap!
Very impressive restoration work!
Thank you! it was a pleasure to watch!
How does Siemens SolidEdge community edition fare against FreeCAD?
You, talking about caps makes me lose my last ppms! :D
I'm blown away once again.
This is awesome 👏. I like how u respect highly sophisticated instruments and how u trying to make it look as new.
@9:00 I knew these when I was I kid, and I wanted one.
One morning somewhere in the 90's I came out of my bed and heard this sound. I was sure I would get one of these.
Instead It was our cat barfing on the floor... It made the same sound :(
Watching your content for witty entertainment as most of it is over my head. Thank you very much for that.
I am intrigued by the idea of using PCBs, especially those aluminum-substrate ones, for labelling and signage. I feel this may be the time to finally install and play with KiCAD. Starting on non-functional parts does not seem as intimidating to me as making circuit boards that, you know, are supposed to actually work.
Could you maybe share a simple design that demonstrates how to set up to specify areas exposing the different materials as you are hinting at starting around 21:50? Or explain it simply? Or point to a place that has information. Preferably suitable to infant-stage capabilities, although I am prepared to study :-).
thats quite soldering station haven't seen one like that before
peak german comedy
Simply incredible analysis and relating to the layman. If the ball bearings 'pop out', won't that be a short circuit issue?
Like the super-Vref project, your persistence impresses!!-Pretty sure I'd have given up
Oh, I think they got the multi-rail idea from the popular audio amp config, 'Class G', that used (at least) 2 supply voltages in that some configuration, for power efficiency / high transient power
Very well done Sir.
love the reversing problem counter, lol, i would like a reversing problem counter for my life
I’ve got a bench power supply that was thrown out also, but I’ve got no hope of doing what you did! aside from verifying the power portion, capacitor health, and diodes…. But since it’s junk anyway, can’t hurt to try.
I wonder what failure caused it to be condemned in the first place ? It seems like most of the work was in repairing subsequent damage. Maybe those warm DACs, or the constant resetting.
Awesome repair work. Would love to see how to reconditioned a VFD display as you described and thanks for the interesting explanation for the driver output stage with gliding voltage enable more MOSFET's that design could be used in a power economical class AB amplifier.
I tried using Solid Edge after I lost access to Siemens NX license, but it felt much worse. Now I got one year left of educational Fusion 360 license. I really hope they don't take away "for personal use" option.
Amazing video! Your dedication to the small details is outrageously wonderful, love it.
Awesome work, Marco! 😃
Looking forward to see the next video about it!
Stay safe there with your family! 🖖😊
Wonderful video. Love this type of content. I'm really upset that Ebay has devolved into a cash grab of rediculous proportions, too.
There we go, my favourite youtuber
When is the next soldering station video coming out?
I barely know enough to understand 60% of what this dude is explaining, but that's enough to understand the jokes. Omg... Next level stuff. Definitely not for all.
Hows the JBC station holding up? Did you encounter any issues since the video never went public beyond Patreon?
Loving it! But I haven't heard anything back from the company yet ... I'll poke them gently 😶🌫
What is a "trojan op amp" and what are the boxes labelled A C+ C-? A normal op amp with bootstrapped supply rails would have a problem because its inputs are referenced to ground.
Your dedication is inspirational. Keep up the great work, and many thanks for all your fantastic videos!
Awesome, thank you so much for this class.
Regarding the replacement of polystyrene capacitors with silver-mica, I know that polystyrene capacitors are often chosen for measurement circuits because of their extremely low dielectric absorption (memory effect). This makes them very good as integrating capacitors, for example, despite the fact that they are an otherwise unassuming component. They are now regarded as largely obsolete because of polystyrene's very low melting point, which makes them incompatible with surface mount soldering processes.
I have not found anything online regarding the absorption properties of mica. Are you certain that you aren't introducing unwanted memory effects by switching the polystyrene caps for silver-mica?
Great video and looking forward to part 2...cheers
Hallo Marco, sehe du nutzt fleißig das Brymen 789, bin auf der suche nach einem anständigen Einsteigermultimeter und habe mir auch das Brymen EEVBlog 786 angesehen, natürlich würde mich ein 87V reizen aber ich denke das Geld kann ich mir für meine Zwecke sparen, bist du denn zufrieden? Oder würdest du noch was anderes empfehlen? Grüße
Amazing. Good job. I feel smarter already.
beautifully done!
Great vid. Love the delivery.
Nicely Done... I only wish you'd make more videos Sir. All the best! :)
Wow, impressive and very relaxing to watch :) Greetings from Poland
Perfect as always!!! Thank you !!
cool video, i used those to make sure grounding strap resistances where good, awesome devices :)
Thanx, I like your knowledge, passion and sense of humor ;)
Awesome repair, looking forward to the cal procedure. Recently got a Metra MT100 nixie voltmeter at a flea market, so may I join the ppm and test equipment hoarding community!
Great work - made me smarter and shed of a few laughs on the journey! Thanks for putting so much work into these videos :)
My 2420 is still not repaired, but I might have seen a schematic somewhere.
Good you didn't need one after all.
The guy who threw it in the recycling knew what he was doing
humor overload repair. Love you
good repair job, liked the explanations!
Impressive equipment !
What a great job!
Can’t wait for the electrometer!
very impressive, thank you!
MARCO ONSHAPE STAN CONFIRMED?!?!?
Absolute class!