What did you buy today? Post your latest purchase!

[Zucca]

I don't have it in hand yet - literally won the auction yesterday.  Could you expand on the advise to recap it?  Do capacitor failures in these units lead to secondary component failures?

yes, best case some chips needs to be replaced. Worst case the acid eats the copper tracks away on the PCB. They (K200x) are ticking bombs.
https://xdevs.com/fix/kei2001/

I would not even turn it on before recapping it.

[neverendingstudent]

I don't have it in hand yet - literally won the auction yesterday.  Could you expand on the advise to recap it?  Do capacitor failures in these units lead to secondary component failures?

yes, best case some chips needs to be replaced. Worst case the acid eats the copper tracks away on the PCB. They (K200x) are ticking bombs.
https://xdevs.com/fix/kei2001/

I would not even turn it on before recapping it.

Very good to know, thank you.

While I know about Mouser / Digikey - any advice for good price (better than those two?) sourcing for the components?

[Zucca]

I heard people are buying from Aliexpress, never tried myself.

[edavid]

I heard people are buying from Aliexpress, never tried myself.

I hope they don't buy capacitors for expensive test equipment there.  Maybe LCSC.

OP, you can check Arrow as well, although their web site is the worst.

[gamalot]

Some chips and two raspberry pi pico 2 for myself, and a micro:bit for my son

[Martin72]

5 pcs 50Ohm terminators...

[Smokey]

5 pcs 50Ohm terminators...

Might want to characterize them

Code: [Select]

https://www.youtube.com/watch?v=GRwT2Xnq7d8

[neverendingstudent]

I don't have it in hand yet - literally won the auction yesterday.  Could you expand on the advise to recap it?  Do capacitor failures in these units lead to secondary component failures?

yes, best case some chips needs to be replaced. Worst case the acid eats the copper tracks away on the PCB. They (K200x) are ticking bombs.
https://xdevs.com/fix/kei2001/

I would not even turn it on before recapping it.

Ok, I have it and it is non-functional.  It *isn't* the caps though, so that's good.  Initial Mk.1-eyeball diagnostics found the chip 'U310' let out the magic smoke in a visibly obvious way.  DC volts and resistance fails - DC volts jumps around up to the +/- hundreds of volts, ohms just stays on 'OVERLOAD'.  Oh, and it turns out it's the 'M' variant as well, so that's nice.

[edavid]

Earlier today I won an auction for a Keithley 2001 7.5 digit multimeter - the first 7.5 digit I'll have ever gotten my hands on - for $632 total.  NOT parts/repair status - working.

Ok, I have it and it is non-functional.  It *isn't* the caps though, so that's good.  Initial Mk.1-eyeball diagnostics found the chip 'U310' let out the magic smoke in a visibly obvious way.  DC volts and resistance fails - DC volts jumps around up to the +/- hundreds of volts, ohms just stays on 'OVERLOAD'.  Oh, and it turns out it's the 'M' variant as well, so that's nice.

I'm confused, is this the same meter?  Are you going to return it?

[neverendingstudent]

Earlier today I won an auction for a Keithley 2001 7.5 digit multimeter - the first 7.5 digit I'll have ever gotten my hands on - for $632 total.  NOT parts/repair status - working.

Ok, I have it and it is non-functional.  It *isn't* the caps though, so that's good.  Initial Mk.1-eyeball diagnostics found the chip 'U310' let out the magic smoke in a visibly obvious way.  DC volts and resistance fails - DC volts jumps around up to the +/- hundreds of volts, ohms just stays on 'OVERLOAD'.  Oh, and it turns out it's the 'M' variant as well, so that's nice.

I'm confused, is this the same meter?  Are you going to return it?

It is the same meter - it was advertised as fully functional, but isn't.  I settled with the seller for a 50% refund and I'll keep the meter - so ~$300ish for a 2001M that needs repair, but isn't a cap-leak repair - acceptable to me.

Thank you XDevs for having so much documentation available: https://xdevs.com/review/kei2001m/ - though I will admit that for the life of me I CANNOT find U310 on the schematics, and they are old-school PDF images so not searchable.  Still, I anticipate this is a repair that can be done - if I'm lucky, this was a failure caused by input abuse and it's just that one component, if I'm not lucky, something else killed that component and it's not visually evident.
[/quote]

[Zucca]

K2001M for $300 is a cool deal, but it is a lot of work. Checking a 7.5 is an adventure.

Analog board page 6, coordinate D6-7


I beg you on my knees to recap it, you are walking on thin ice. It does not surprise me you received a not working K2001.

Moreover, I propose replace shift registers 14094 and all analog switches (DG411/DG404/DG211). It is much faster than troubleshooting these failures.

Open a new thread in the repair section and post the result of a self test, see you there.

[neverendingstudent]

K2001M for $300 is a cool deal, but it is a lot of work. Checking a 7.5 is an adventure.

Analog board page 6, coordinate D6-7


I beg you on my knees to recap it, you are walking on thin ice. It does not surprise me you received a not working K2001.

Moreover, I propose replace shift registers 14094 and all analog switches (DG411/DG404/DG211). It is much faster than troubleshooting these failures.

Open a new thread in the repair section and post the result of a self test, see you there.

Thank you, both you and user edavid who ran the schematics through OCR and emailed it to me so I could search.  This helps.

I fully intend to recap as preventative maintenance while doing other repairs.

It occurs to me that this is not the right place to continue this.  I've made a proper post in the repair section of the forum if you'd like to join me there: https://www.eevblog.com/forum/repair/keithley-2001m-7-5-digit-multimeter-repair-(not-a-bad-capacitor-failure)/msg5844301/

[JoeRoy]

..finally, ordered today, a Probemaster 8000 series Test Lead Kit

default worked out ok -

https://probemaster.com/8000-series-kits/

OMG, I paid $14 with free shipping 4 years ago...  Bideneconomics...

[tautech]

New 34" curved workstation monitor to replace 2x 24" monitors.
https://www.philips.co.nz/c-p/346P1CRH_75/brilliance-curved-ultrawide-lcd-monitor-with-usb-c

[RAPo]

It seems (at least in the Netherlands) that the Siglent SDG1062X is sold out.
I've got one from Welectron.

[Alex Eisenhut]

I went thrifting and this caught my eye. $8.49, not bad.

This is with no options, so battery powered, the battery is missing. A big old 22.5V pack. Other than a bit of grime, it's physically in great shape.

[Aldo22]

Today I got a bluetooth clamp meter: Owon CM2100B.
DC mA is pretty decent for a clamp meter.

[CaptainBucko]

Foam blocks. Small ones. Really useful, wet them with ISO and they clean up flux and crap on a PCB surprisingly well. Been using normal cotton Q-Tips but these will be my go to from here on in.

https://www.aliexpress.com/item/1005007580843824.html

[beanflying]

Shouted myself a new programmer as I have a few to do on my 3458A Fixup/Repair. Plenty of options on the T48 from bare to fully loaded for Bear but this mid range one and a couple of other extras seemed like where I wanted to be. https://www.aliexpress.com/item/1005004419370100.html?

Discounts on some of it for AliX's 15th Birthday too.

[Zucca]

Foam blocks. Small ones. Really useful, wet them with ISO and they clean up flux and crap on a PCB surprisingly well. Been using normal cotton Q-Tips but these will be my go to from here on in.

https://www.aliexpress.com/item/1005007580843824.html

and no lint, correct?

[PlainName]

Foam blocks. Small ones. Really useful, wet them with ISO and they clean up flux and crap on a PCB surprisingly well. Been using normal cotton Q-Tips but these will be my go to from here on in.

https://www.aliexpress.com/item/1005007580843824.html

and no lint, correct?

Correct.

Got these and they are pretty good - as stated, better than cotton buds. But the blurb says they are cotton (one of the reasons I got them was because I didn't want to add to the tons of plastic pollution) but they are not. They are just normal packing-type foam (albeit with tiny holes) separated into small blocks.

If you're not that bothered about disposal they do the biz.

[InductorX]

Apparently these sponges are better than the ones mentioned above: https://www.aliexpress.com/item/1005007520141253.html according to a review I saw recently they are a bit more firm and soak up more, I might get them to compare, as I also have the ones mentioned.

[cunningfellow]

These little foam blocks you soak with isopropyl are great.  The cotton buds still have a place but for cleaning up lots of mess the foam blocks are the guy.

[ledtester]

Foam blocks. Small ones. Really useful, wet them with ISO and they clean up flux and crap on a PCB surprisingly well. Been using normal cotton Q-Tips but these will be my go to from here on in.

https://www.aliexpress.com/item/1005007580843824.html

Is this the same as the "Mr. Clean Magic Eraser"?

The Untold Truth Of Magic Eraser -- Grunge
https://youtu.be/SHUGQPatlhQ

[CaptainBucko]

Decided to take the risk despite some reported quality issues and purchase the Best BST-863 Hot Air station from here: https://www.aliexpress.com/item/32961677425.html - with the current Ali sale with $40AUD off coupon (needing a few bits and bops to get the total order value over $270 ), that gets the price down to $240 ish AUD + GST shipped via DHL. Considering my current hot air tools are a Weller WTP-200 Butane iron with hot air tip or a Bosch paint stripper, I think it will be a great new weapon in the arsenal.

I'll also be ordering the upgraded control board from RandomHacks https://www.tindie.com/products/randomhacks/best-bst-863-improved-control-board/