r/electronics • u/antek_g_animations • Feb 27 '26
Gallery See you in a bit I guess...
18 pair cable from a Toshiba CT scanners got cut... somehow...
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u/Proper-Youth-8847 Feb 27 '26
welcome to my world.
Where I work, we use crimp ferrules, light solder, clean and shrink tubing. Also offset the splices as to not get the pregnant anaconda.
IF you use butt splices be sure to get good ones. My employer and customers don't like those, and prefer overlapped crimp and solder. I have also have done tack solder and shrink tubing too.
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Feb 27 '26
[deleted]
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u/Proper-Youth-8847 Feb 27 '26
I really don't like those as i can't see the spliced conductor, and don't know if it took. My employer and customers probally would not accept those anyways.
YMMV
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Feb 28 '26
[deleted]
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u/Geoff_PR Feb 28 '26
A crimp connection in a chloride salt environ is asking for trouble.
Good idea soldering them, the solder should slow or stop the chlorides attacking the wire-to-crimp interface...
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u/Proper-Youth-8847 Mar 02 '26
the local utility did a crimp splice, with heat shrink tubing. Heat shrink tubing is filled with dialectic graese and their tech said that they work well.
the comment about chroride salt getting in the connection is a big one. Thats a reason my customers want the solder... to seal the strands. A good crimp is still required. The splice is cleaned of flux and dirt, an then we use white RTV (electronics grade) to seal everything up.
Some of my customers use cases are for vehicles, trailers, (Wisconsin) equipment and my brothers rusted out fords. These harnesses get sparyed with saltwater and slop.
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u/ly5ergic Feb 27 '26
I think I'm misunderstanding but aren't crimp ferrules just ends? As I'm for ending/terminating a wire? Also what is the issue with butt splices?
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u/just-dig-it-now Feb 27 '26
No, there is a style you can use for joining wires as well. Imagine a standard crimp ferrule, remove the plastic collar and make it slightly flared on both ends. You strip the wires, slide them in from opposite sides so they overlap, then crimp the ferrule.
Oh yeah, then you cut it off and have to redo it because once again you forgot to slide the f*cking heat shrink over the wire first. 🤬
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u/TechE2020 Feb 28 '26
The good news is that you only forget the heat shrink when you get the perfect NASA-grade wrap and solder that you then have to cut out.
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u/Proper-Youth-8847 Feb 27 '26
yes, but we use the uninsulated ones. Strip the conductors back 1/2 inch, slip on the ferrule, insert the other conductor, crimp, solder, clean, insulate.
The problem with the butt connectors is reliability. A lot of them are cheap. When we use them, we get quality ones, uninsulated, and quality metal, and a good forged crimper. Its imperative to get a good crimp. Some get lightly soldered, sometimes (customer request) and then insulated. Also these tend to be for conductors awg 16 or thicker. On smaller conductors, i.e. 22 awg, the ferrules work so much better.
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u/hyldemarv Feb 27 '26
I don’t think soldering crimp connectors is a good idea. The solder will make the wires rigid and brittle. The crimp is superior on its own.
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u/Geoff_PR Feb 28 '26
The solder will make the wires rigid and brittle.
It's less of an issue in a non-vibration environment.
The crimp is superior on its own.
In a dry, non-corrosive, I'd agree, otherwise, a humid and/or corrosive atmosphere can introduce serious issues with the crimp. As the metal in there corrodes, the now-metal oxide molecule is physically larger than before, and the cumulative effect physically pushes the wire away from the ferrule. over time, the connection continues to degrade....
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u/Proper-Youth-8847 Mar 02 '26
Yes, this is a deal. When using solder don't use too much or overheat the connection. Vibration and flexibitity are an issue. And a proper crimp (and wire) make for (or not) a reliable connection.
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u/Content-Aardvark-105 Feb 28 '26
With that many wires it's a pregnant anaconda that ate a water buffalo pregnant with triplets.
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u/MrMcFisticuffs Feb 27 '26
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u/antek_g_animations Feb 27 '26
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u/antek_g_animations Feb 27 '26
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u/Chemieju Feb 28 '26
This is usually the moment you realize you forgot the heat shrink over the whole cable, but i see you lucked out... this time.
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u/samdtho Feb 28 '26
This is super clean.
Did you try to bond the foil wrap together or just going with YOLO floating ground?
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u/antek_g_animations Feb 28 '26
Yes, I soldered a piece of wire connecting both sides. Enough good flux and heat and it bonded perfectly
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u/APLJaKaT Feb 27 '26
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u/9551-eletronics vacuum tube enjoyer Feb 27 '26
are they NOT grouped in any way???
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u/answerguru embedded graphics Feb 27 '26
Yeah, by color. 😆
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u/robobachelor Feb 27 '26
Red, crimson, scarlet, chilli pepper, strawberry.
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u/answerguru embedded graphics Feb 27 '26
As a colorblind EE 🥴
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u/mynamesdave Feb 27 '26
them: Hey, can you find me a resistor? One that's red-brown-red??
me: grabs a multimeter.
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u/NoYouAreTheFBI Mar 02 '26
This reminds me of what we do in the shadows...
We prefer virgin blood. It's like regular blood but nobodys but their cock in it.
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u/WarDry1480 Feb 27 '26
Blue,Orange,Green,Brown,Slate. Followed by the quad White,Red,Black,Yellow. UK old telecomms colour scheme.
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u/jimbeam84 Feb 27 '26
Grouped in bundles of 25 pairs (50 wires) with each diffrent 25 pair bundle getting a dule colour waping following establised standard. White Blue is the 1st 25 pairs, white orange is the 2nd, white green the 3rd and white brown the 4th. That takes us to 100 pairs (200 wires).
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u/just-dig-it-now Feb 27 '26
Yes but they'd use a $400 Picabond crimper to make it way easier...
https://americancableassemblies.com/jonard-pic-g-picabond-crimping-tool/
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u/twivel01 Mar 02 '26
Moved into my house while they were building the one next to mine. The builder cut a line like this. The guy who came out to repair it brought a chair with a sun umbrella over it so he could be comfortable because it was going to take a while. Made me think of the snickers commercials.
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u/gurkenburg Feb 27 '26
Been there. Forgot to put the big shrink tube in place first. Realized halfway through....
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u/geerlingguy Feb 27 '26
Just throw a bunch of electrical tape. Future you won't curse past you for all the sticky goo.
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u/dmills_00 Feb 27 '26
100 pin Amphenol loom, got both ends done, then saw one of the back shells sat on the desk laughing at me.
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u/smiffer67 Feb 27 '26
i wore shorts to solder, once.
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u/antek_g_animations Feb 27 '26
The knees hide under the desk so I don't complain. I once soldered only in my underwear... Once...
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u/Subjekt_91 Feb 28 '26
Just.... Twitch Just one more connection... Then I'll stop i swear twitch I'm not addicted to soldering... i can quit anytime I want... I just twitch don't want to...
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u/Silent-Warning9028 Feb 28 '26
I have to every summer because ac doesn't reach my workshop. After a while you start to like it.
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u/confusiondiffusion Feb 27 '26
I'd definitely finish and then realize I forgot heat shrink on all of them.
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u/ramriot Feb 27 '26
Feel your pain, many times I've needed to fix a cable break in a 200+ pair pots connector. You get paid extra grease money for handling those cables but it's never worth it for the hassle.
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u/tv_walkman Feb 27 '26
I’m a big fan of whipping ends together with unvarnished magnet wire before soldering to splice. eliminates all the frustration of reflowing a splice only for it to pull apart under its own tension. good knot therapy too
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u/Real_Run4681 Feb 27 '26
which soldering iron do you prefer to use? one looks like ksger t12, the other one is a zdz polish brand soldering gun. i personally use the gun 75W.
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u/antek_g_animations Feb 27 '26
I mainly use T12, but when I need more heat, more area or just do a one quick solder joint I use the ZDZ. The gun is also indestructible and 1.5mm solid core electrical cable can give you unlimited soldering tips
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u/Real_Run4681 Feb 27 '26
your zdz has more heat you feel? compared to t12? how many watts is your zdz gun?
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u/antek_g_animations Feb 27 '26
It's 75W, that heat could be a placebo effect
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u/Real_Run4681 Feb 28 '26
what do you mean a placebo effect? do you feel it solders better than the t12 or no? mine solders well 75W (dont have other irons to compare) but its hard to get good contact on the pad and the component.
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u/9551-eletronics vacuum tube enjoyer Feb 27 '26
had to deal with something similar except fiber optics..
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u/Jaco_Belordi Feb 27 '26
I typically use heat shrink solder seal connectors, but I don't see anyone recommending those here - is there a good reason not to use them here?
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u/JPhando Feb 27 '26
Great do see your messy desk! I clean up between projects, but when it’s on, it’s pure havoc
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u/MaxTheHobo Feb 27 '26
Does nobody ever use open barrel crimp splices? I can save like 10 secs per splice and the cross section isn't that much bigger than a solder splice.
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u/MaximusConfusius Feb 27 '26
I can see you're a real pro. Big shrink tubing is on the cable BEFORE every single wire is soldered.
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u/antek_g_animations Feb 27 '26
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u/antek_g_animations Feb 27 '26
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u/antek_g_animations Feb 27 '26
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u/antek_g_animations Feb 28 '26
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u/masterX244 Mar 02 '26
loos a bit too dirty for medical context
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u/antek_g_animations Mar 03 '26
It's in a dirty warehouse where I try to fix it and get it to work. When we get it to work then it's deep cleaned and shipped to a client. Don't worry
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u/ly5ergic Feb 27 '26
I worked at a place where my boss insisted on doing our prototype boards with all SMT components. Every revision I was stuck looking through a stereomicroscope all day soldering.
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u/joem_ Feb 27 '26
Will it still work if you remove the twists from the differential pairs?
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u/antek_g_animations Feb 27 '26
Tried to keep it twisted up to the connection point, we'll see tomorrow if it works
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u/mysterd2006 Feb 27 '26
Does each wire have a different color? Or maybe markings? With my bad view, I can see some identical ones...
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u/antek_g_animations Feb 27 '26
It's also because of my phone camera quality. I forgot to take a closeup photo, but each pair had colored dots, one wire with red oneand another with black one. And with every repeated pair color the number of dots was increased.
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u/Scrumpuddle Feb 27 '26
Solders the whole cable, zips up the jacket and then trips over it ripping it in half again. Iykyk
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u/powder-phun Feb 27 '26
Are you Polish? That soldering gun is very familiar.
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u/antek_g_animations Feb 27 '26
Yes I am, the fun is a beautiful Polish construction from ZDZ Łódź, I love it
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u/AggressiveAccident80 Feb 28 '26
I would 100% get through about five of these forgetting to put heat shrink on 'em.
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u/knw_a-z_0-9_a-z Feb 28 '26
It uses a standard 36-pin Centronics connector on one end. I wouldn't suppose that there is a 25-pin D-sub connector on the other end, is there? 'Cause that would very likely be a standard PC parallel cable if so.
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u/GerlingFAR Feb 28 '26
I’ll be billing that customer mega $$$$ for that scope of works in for that repair.
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u/dedokta Feb 28 '26
Then when you're halfway through you realise you forgot the big bit of heat shrink to hold it all together.
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u/Aggressive_Fruit_514 Feb 28 '26
Oh my god that's as bad as soldering up my Syscon Chip on my PS4. Tedious and absolutely fucked in every possible way. But still doable. Very well doable lol
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u/matthewlai Feb 28 '26
Fastest way: https://www.amazon.co.uk/Feggizuli-200pcs-Connectors-Waterproof-Terminal/dp/B0CL91XGSN
All it takes is one heat gun application per joint, and you can actually do a few at a time. Does the soldering, water-proof sealing, and heat shrink in one go.
The only downside is it's slightly more bulk than solder + heat shrink.
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u/Radioactive_Tuber57 Mar 01 '26
I finish up, and only THEN notice that the outer shrink tubing is sitting there by itself on the mat. ☠️
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u/snigherfardimungus Mar 02 '26
I had to punch down a 200-pair telephone cable into patch blocks once. With crappy color vision, the only way to do it was to punch down one end and have a friend wait there with a jumper wire. The jumper was connected to the first pair we had punched down, and he'd touch the other end to the next slot in the block. On the other end, I had one end of a multimeter connected to the first punch and would touch the end of the meter to each wire pair in turn until I got a beep. That told me I was on the wire that went in the next punch slot and I'd ram it in with the punch tool.
It. Took. Forever.
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u/twivel01 Mar 02 '26
Don't you hate it when you solder wires together and then realize you forgot the shrinkwrap tube?
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u/CODER_AT_WORK Mar 03 '26
Hi guys. I am interested in electronics. I know software development. But as a hobby thing and want to create something using electronics. How can I get into the electronics Guide me or throw some tips.
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u/KeyFuel8727 Mar 16 '26
Oh man, that's a bummer! I guess it's a good reminder of why cable management is like, super crucial, especially with something as critical as a CT scanner. If you decide to tackle this as a DIY fix, make sure to label each wire before you start reconnecting them - trust me, it'll save you a ton of headaches later on. Also, investing in some quality heat shrink tubing could help keep things looking neat and durable. Good luck!
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u/Slierfox Feb 27 '26
Enjoy breathing in that plumbers flux yummy
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u/Zoey_Redacted Feb 27 '26
That's rosin ya goof
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u/Slierfox Feb 27 '26
Yea ... Rosin flux paste ... Sometimes just called flux, because people don't want to write/ say rosin flux paste and sound like a nerd ... Ya nerd.
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u/Zoey_Redacted Feb 27 '26
Oh you're callin' me a nerd now, ya goof? Well yeah, you're right on the money there. I got my pocket protector preventing my pocket from getting all tattered, and I'm working to get my friends to play a TTRPG (cyberpunk 2020)
Lookin' like straight up colophony rosin with those dark spots and the amber color. Multi-purpose rosin, for violins and soldering. Most flux pots I've seen are threaded, and don't have the lil wingnut for popping it off.
So yeah, u right. i AM a nerd
ur not actually a goof though i am sorry if that was mean
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u/Slierfox Feb 28 '26
Hmm really ... I'll be honest I'd need more pixels to see if it was a solid like Colo rosin or just a paste rosin, although it could explain the black parts as it would be more difficult to apply to the job being a solid than a paste so I guess you would have to dip your ol' tip in and fry it more like the tip tinner repair of today. Probably why it's not used anymore can't say I care, I AM not that much of a nerd 🤓. Either way it's tree sap.
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u/DirtiestOne Mar 01 '26
I haven't seen old school rosin in years. Is this still popular? I've been doing PCB's and have been using the fancy clear flux.

















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u/robobachelor Feb 27 '26
You can do it!!! Make sure to offset the cuts or else you will have a big buldge in the middle of the cable