I've successfully repaired this Fluke 8840A bench multimeter!

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Tube🍂Time

Like 2 Jul 2023 at 19:58 | Open on mastodon.social

11 comments

Tube🍂Time

it used these weird custom Fluke analog switch chips, 700013. several of them failed, so I made tiny PCB replacements!

2 Jul 2023 at 19:59 | Open on mastodon.social

Tube🍂Time

i named the replacement 700013 chips FLOOB TOOOLE. the design is open source, and you can find the files right here: https://github.com/schlae/TOOOLE

2 Jul 2023 at 20:01 | Open on mastodon.social

Matthijs De Smedt

@tubetime Wow. You an inspiration for those into electronics repairs. I'm already happy when I can identify and switch out a bad cap or transistor..

Fixing old equipment is doing a good deed :blobcatthumbsup:

2 Jul 2023 at 20:06 | Open on social.anji.nl

Steve1981

@tubetime

Can you post this to the Vintage Electronic Test Equipment (VETE) group on Facebook?

2 Jul 2023 at 20:35 | Open on urbanists.social

Jeff Haluska

@tubetime The most interesting part is line 573 of TOOOLE.kicad_pcb.

3 Jul 2023 at 0:49 | Open on mastodon.social

Phil M0OFX

@tubetime Wow, nice work! I'm not sure I'd have done the same - but maybe I should train myself to be less squeamish about such things. Nicely done, and thanks for sharing the design with the community :)

2 Jul 2023 at 22:05 | Open on digipres.club

Nate Gaylinn

@tubetime It's wild seeing your bespoke fabricated 2020's tech integrated into a mass manufactured 90's circuit board. I love it!

3 Jul 2023 at 2:10 | Open on tech.lgbt

bendodge

@tubetime seeing this makes me realize how much PCB's have changed since I was a small child tearing them apart.

6 Jul 2023 at 13:12 | Open on mastodon.social

Norman Wilson

@tubetime Could you do it again or was it just a ... never mind.

2 Jul 2023 at 20:28 | Open on mstdn.ca

JeffG

@tubetime curious, does this not have repair functions like continuity, diode check, etc. Been notiticing the bench ones are more measurement.

3 Jul 2023 at 2:44 | Open on mastodon.social

Thomas Hauer

@tubetime that one brings up good memories!

3 Jul 2023 at 4:33 | Open on mastodon.cloud

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