Fancy pants are here: teespring.com/magic-repair-pants?pid=1166&cid=104260 I'm told that for a while (as of 11/21/2020) there is free ship on US orders over $50 using the code: FREEOVER50
@lerkzor
3 жыл бұрын
G'day Marc - first off, nice job fixing all those interfaces. I hope to see the 9825 doing some work in future videos. Now, the real reason for my post - what is the conversion from 'S M L XL XXL' to waist sizes (like size 32 or 36 or 40 or etc)?
@twitzel25
3 жыл бұрын
Being a Dummkopf I forgot to read your message past clicking the link and ignored the code. Still looking forward to the pants to help me fix an ancient one-off instrument that even the manufacturer has no recollection of and that has OEM bodge wires galore... As always, I eagerly await all your videos, best Patreon investment on the web in my opinion!
@jacktheaviator4938
3 жыл бұрын
The printing on the fancy pants are done using a process called "dye sublimation". It's a fascinating process, the print is actually applied to a substrate, such as paper, then pressed to the fabric and heated, the design is turned into a gas, which dyes the fabric.
@MVVblog
3 жыл бұрын
I can't do without :-)
@CuriousMarc
3 жыл бұрын
@@twitzel25 Thanks for the support! Highly appreciated!
@graemedavidson499
3 жыл бұрын
I love the ingenuity and quality of HP test gear. It’s a shame HP is now more infamous for ink that could have been used to print the fancy pants.
@anonymousarmadillo6589
3 жыл бұрын
Agilent and Keysight are doing a great job of keeping HP's legacy alive.
@fredg8328
3 жыл бұрын
EEVBlog found a nice documentary about their history. kzitem.info/news/bejne/qqesnHierX6SrGk
@77leelg
3 жыл бұрын
@@anonymousarmadillo6589 printers and computers had more brand recognition and generated more revenue than instruments when the company was split so HP management did things backwards. Instrumentation tried to maintain the culture created by Hewlett and Packard while computing and printing gutted it under Carly Fiorina. It was a sad thing to watch and be a part of.
@anonymousarmadillo6589
3 жыл бұрын
@@77leelg My Dad was a part of it too, when HP split into HP, Inc, and HP Enterprise.
@lumberjackdreamer6267
3 жыл бұрын
@@77leelg Well said.
@larryhuff3383
3 жыл бұрын
This is awesome Marc. I designed a test station for measuring and calibrating hearing aid amplifiers in the early 80’s. It was controlled by a fully loaded HP85. All four slots were used. Rom drawer, 16k expansion memory, parallel interface and IEEE interface. I used the parallel interface to create an 8 bit expansion bus within the test stand to control A/D converters and variable gain amplifiers. Your series brings back memories of those glorious years writing HP basic code. Thanks for the memories...
@_2N2222
3 жыл бұрын
I still have a 1999 HP Test & Measurement catalog that I decided to keep for sentimental reasons when HP's T&M division was spun off as Agilent later in this year. HP's catalogs were always impressive books, reflecting the state-of-the-art in its field. When quickly browsing through the catalog, there were not so many people in the pictures and even less where trousers are visible. In the editorial, there were Bill and Dave shown lounging in their armchairs, but that's pretty much it. Fashion had calmed down at the end of the past millennium, but engineers were still shown wearing shirts and ties. As far as I could spot, there is only person depicted from head to toe, a lady sitting next to the HP TS-5500 cellular phone test platform. The exposure of the picture was optimized for the test equipment, leaving the person a bit dark in the image. She wears a timeless business dress that would go well still today. The fashion craziness of the early 1980s had disappeared from the 1999's catalog, just as the name HP from the T&M field a few months later.
@davidgrenfell1484
3 жыл бұрын
Brings back memories. I developed a program on this machine to calculate odds and pay-offs for horse races in the ‘70s and 80s. I had to install a serial interface to drive my centronics 580 dm printer, that could print at a staggering 80 cps in caps only. I bought mine as a used unit for a bargain price of $12,500. I never upgraded the memory because at the time, memory cost 1.2 million per megabyte
@T3hBeowulf
3 жыл бұрын
A brilliant full-circle demonstration of *why* these are so complex. Thank you for producing this entire series. These modules, and the calculator was truly fascinating to see in action as well as to have such a thorough explanation of the internal function, circuits and thought process during repair.
@seancurry2863
3 жыл бұрын
The sounds of the HP 9825 printer and cassette reader brings back a lot of memories. I spent a summer in the 1970’s at Carl Zeiss Canada, programming the 9825 to make precise measurements with the Zeiss Coordinatograph. Great computer for its time. I didn’t have the Fancy Pants though.
@TrimeshSZ
3 жыл бұрын
The reason for those blue caps on the lamps is that it allows you to run them at reduced voltage for longer life and still have white illumination.
@Rob2
3 жыл бұрын
Fran approves of the use of that switch!
@andrewrixon2347
3 жыл бұрын
A classic repair Marc. You have a great basement, cool toys to play with and, most importantly, an understanding wife & Family.....you’re a very lucky guy !
@mrnmrn1
3 жыл бұрын
Yes, using LCDs instead of CRTs in the restored control room is a sin. But it would be more acceptable if at least the LCDs were bigger so the rounded edge of the monitor faceplate cover up the corners. It would look like more CRT-like, not as horrible as it is now with these perfectly rectangular displays.
@noisytim
3 жыл бұрын
That is some next level pants fancyness :D I love it!
@MikeF1189
3 жыл бұрын
2:52 This module was quite amazing for its time. Budump Tish. I'm here all week.
@fredflintstone8048
3 жыл бұрын
We had those identical push buttons in a utility plant I worked in. I had to pull them apart to change bulbs, and do other repairs from time to time. They had those little rubber condoms on the bulbs to indicate the state of the circuits.
@freddyburger5574
3 жыл бұрын
Ahh, another fantastic CuriousMarc repair saga comes to its conclusion! Thanks for bringing us along for the ride!!
@qrplife
3 жыл бұрын
I love that machine. I need to just calm down before I start off on a quest to own one.
@Bierkameel
3 жыл бұрын
2:00 Am I the only one who reads it as Magic repair, vintage pants?
@cojawfee
3 жыл бұрын
Don't dead open inside
@CuriousMarc
3 жыл бұрын
See, it's very magic. Can be read two ways!
@dammonbutler6951
3 жыл бұрын
Thank you for this amazing series. Not only is it fascinating as an engineer watching you get these lovely pieces of history working again, you always add such interesting details of how they work at the lowest level. You are one of my favourite channels by far!
@Kalumbatsch
3 жыл бұрын
Be sure to buy a grounding strap along with the pants, the nice fluffy polyester might fry-repair your delicate semiconductors out of existence.
@dougelick8397
3 жыл бұрын
@SteelRodent Give the state of vintage Engineers, that better be big strap.
@ErraticPT
3 жыл бұрын
Pity the pants aren't flared like the originals!
@CuriousMarc
3 жыл бұрын
I'm told it's slightly out of fashion ;-) ... Whomever wants to re-edit them with flared bottoms sure gets my pattern for free!
@mycosys
3 жыл бұрын
@@CuriousMarc ironically they are actually the height of fashion atm, revival of the 90s 70s revival. Case in point us.boohoo.com/tall-check-flares/TZZ93412.html www.prettylittlething.com/stone-check-ribbed-flared-trousers.html www.rustyzipper.com/shop.cfm?viewpartnum=366366&backtorow=8&jumpshow=0&SIZE=&ERA=ALL&TYPE=Pants%20%2D%20Flares&SEARCH=&GENDER=Mens
@mycosys
3 жыл бұрын
I would also love to see them in cotton rather than poly, cos the last thing vintage repair needs is static lol. And yeah definitely a better cut lol. Im tempted to get some, had some lovely check boot leg pants in the 90s lmao
@CuriousMarc
3 жыл бұрын
@Mijc Osis: Oh I’ll be darned. Maybe we have a chance!
@juliankandlhofer7553
3 жыл бұрын
@@CuriousMarc Definitely keep us updated on this! If you make a flared cotton version I will buy them for sure!
@y_x2
3 жыл бұрын
I have used a HP desktop calculator design in the mid-1960. It had a CRT, a magnetic card reader and HP-IB output. This calculator had no IC!!! Only diodes and transistors! The memory used magnetic core, the ROM was composed of a PCB the size of the machine full of diode! Registers was composed of a small PCB with transistors.
@CuriousMarc
3 жыл бұрын
That is the HP 9100! The quintessential scientific calculator that started it all. The 98xx series is a descendant of that. Not having a 9100 is one of the remaining big holes in my collection.
@DKTAz00
3 жыл бұрын
Amazing quality, very well made, 10/10 would pants again
@DouglasFish
3 жыл бұрын
Serious pants for serious jobs
@sergeaudenaert
3 жыл бұрын
Wonderful - what a nice climax to such an elaborate repair track - thank you very much - great job and sharing!!
@radarmusen
3 жыл бұрын
Maybe the fancy pants guy is young George Hnatiku, he has worked at HP and has a lot of HP equipments. :-)
@totolastico
3 жыл бұрын
Encore une super vidéo. Merci Marc
@phatcowboy76
3 жыл бұрын
Mon Dieu you had me laughing with the fancy pants.
@wacholder5690
3 жыл бұрын
Hi ! @ 0:16 - the TI "Integrated Circuits Catalog". Looked familiar so I walked over to my bookshelf. TI "The TTL Databook for Design Engineers". Fifth European Edition 1982. Was a great aid on understanding PC/XT/AT and expansion card inards from the mid-80s onwards in the time before Internet. Got it at one point when the next edition appeared from a company I worked for part-time. Also a great help when building add-ons for my Z80-gear still in the 2010s. :-)
@spartanx5806
3 жыл бұрын
🎶fancy pants...🎵youve got the cutest little fancy pants🎶
@acmefixer1
3 жыл бұрын
In the Army in the late '60s we had those same switches in the search Radar consoles. The designations on the switch buttons were classified and had to be locked in the safe. I have a whole story about that but it's that military intelligence is an oxymoron! ☹️😱
@anomaly95
3 жыл бұрын
"The designations on the switch buttons were classified and had to be locked in the safe." That makes sense from a security standpoint. You can get a good idea of how a piece of equipment works (or even operation procedures) just by looking at the control panel or switch legends. These switches could be custom ordered from MSC with engraved legends with black paint infill. I would bet NASA also didn't do this due to security concerns during the Apollo era.
@tony359
3 жыл бұрын
Hey - I have enjoyed/I am enjoying this whole series! Well done, I look forward to more content!
@drakethedragon457
3 жыл бұрын
I can't wait till something goes bang and he has to fix it again! Love the repair-a-thon videos
@VintageTechFan
3 жыл бұрын
17:15 .. I agree with you .. that's a cardinal sin! ;)
@Hans-gb4mv
3 жыл бұрын
For me, it's not even the fact they used LCD screens, but just looking at those pictures makes me think that they did not intend to put much effort into it.
@TheDecguy
3 жыл бұрын
I’ve got one of these, not working though. Lots of other vintage HP stuff also.
@chefchaudard3580
Жыл бұрын
A loooong time ago, some photographers came to our service dept. To take some pictures of us for a leaflet. I wore my "repair red shoes" at the time. Unfortunately, the picture on the leaflet was in black and white. I like to think it is because of my red shoes, as othe pictures were in color. 😁
@alex1520
3 жыл бұрын
The pants look good, but they are missing the signature 70's flare at the bottom
@TooManyHobbiesJeremy
3 жыл бұрын
Impressive work
@nmccw3245
3 жыл бұрын
Great wrap up to the series Marc. That switch really needs a vintage Apollo console...
@bobwatson957
3 жыл бұрын
Cool trousers.
@irgski
3 жыл бұрын
I think the IBM 360 used similar lighted push buttons.
@Hiphopasaurus
3 жыл бұрын
So the programmable timers are separate and distinct from the TI clock interface circuitry? It seemed quite a bit of an over-engineered solution to require a microcontroller as an interface to a wrist watch just so the computer can have the time. Seeing now that it can do a lot more, it all starts to make more sense. Does it do any other tricks?
@tabajaralabs
3 жыл бұрын
great and fun content, marc!
@JohnDlugosz
3 жыл бұрын
I wonder why it needs a separate built-in register for a "timer" (times 4 in this case). In modern times, I just declare a variable to hold the start time, and the clock needs nothing more than to provide the current time when called. Is 4 integers really a significant amount of memory? Or do these timers have more features than the elapsed time? Is this the _same_ value that counts down (or offers the reset-to value) in the interrupt mode?
@admirerofclassicalelectron2858
3 жыл бұрын
I wonder if wearing these fancy pants increases the bandwidth of my HP oscilloscope.
@ASilentS
3 жыл бұрын
Magic Repair Vintage Pants!
@Lee_Adamson_OCF
3 жыл бұрын
The magic pants are real! They took me from neolithic mouth-breather to post human repair guru in only a day! The secret lies in the special manufacturing process, wherein the pants are suffused with magic smoke and disco music as part of a special ritual.
@ferrari2k
3 жыл бұрын
16:07 ohhh, she is a looker :D
@alexanderross2786
3 жыл бұрын
Darn!I know have have pulled a few switches like that from something. !!
@vac2bdave
3 жыл бұрын
If I thought I could get away with wearing them at work I would totally by a pare of magic fancy pants!
@redace001
3 жыл бұрын
When you started messing with inputs and outputs, my brain started associating it with some of the things you can do with our modern arduinos / raspberry pis. Makes me curious on what the common tinkerer used back then, since these HP tools were very pricey! Simple TTL chips and breakout boards I'd suspect, just like your watch chip display.😁
@CuriousMarc
3 жыл бұрын
It's actually not that hard. Typically you'd use a TTL latch register in either direction, or a shift register (parallel load for input, serial load for output). The simple method is still used today.
@redace001
3 жыл бұрын
@@CuriousMarc Exactly! Ben Eater uses shift registers on his breadboard computer as a means of handling which device has control of a data bus. Makes perfect sense.
@oblitum
3 жыл бұрын
The best KZitem Chanel 🥰
@jeroenjeroen
3 жыл бұрын
Didn't that need debouncing?
@peteroneill404
3 жыл бұрын
Is the processor module a more integrated version of the 21MX/1000? Also is this the one used in the 3582A spectrum analyzer?
@theharbinger2573
3 жыл бұрын
Did you have to debounce the Apollo switch into the timer?
@CuriousMarc
3 жыл бұрын
No, the calculator takes quite a few ms to respond to the interrupt, plus I think the switch is of very high quality. No bounces.
@randomelectronicsanddispla1765
3 жыл бұрын
By the loud clonk the switch makes, I'd be surprised if there is much of a bounce.
@simontay4851
3 жыл бұрын
_you think_ the switch is very high quality. IT IS very high quality. Of course it doesn't bounce.
@77leelg
3 жыл бұрын
I was thinking the same thing but didn’t see any de-bounce circuit so I assumed it wasn’t.
@CuriousMarc
3 жыл бұрын
Oh I am sure it bounces a little, but not enough to annoy the rather slow 9825 interrupt process. Would be interesting to find out how much it actually bounces though!
@ToasterWithFur
3 жыл бұрын
Apollo engineer be like: dont need switch debouncing when your swich aint making none
@ToasterWithFur
3 жыл бұрын
@@martinhodge921 i know, had to get in the mood
@theannoyedmrfloyd3998
3 жыл бұрын
Let's hope those timer clock boxes don't find other ways to fail while figuring out how they failed in the first place.
@DavidWilliams-rn6uq
3 жыл бұрын
OK Marc - you just know what should be done next: use the timers and output function to make the switch blink like some of them do in the Apollo videos. Extra credit if the calculator changes the blink rate to tell you when to push, and then tells how long it took you to respond!
@arenaengineering8070
3 жыл бұрын
The instrument repair took so long and hard because you didn't have these magical pants. :)
@stephanfrank696
3 жыл бұрын
marc what is the music at the end of this episode? good choice on that :-). i love your videos very much, greetings from germany
@CuriousMarc
3 жыл бұрын
Thanks. It's Festive Dinner from Pony Music (see music credits in the Doodly-Doo).
@dougelick8397
3 жыл бұрын
@@CuriousMarc I see what you did there...
@ifitsrusteditsmine
3 жыл бұрын
Fancy pants and NO SHOES. The new WFH fashion.
@phil6012
3 жыл бұрын
Is there a surplus of those switches? I wouldn't mind having one if they're available.
@CuriousMarc
3 жыл бұрын
I found mine on eBay - but people know they are special. They are not cheap. The 10H versions are the MIL-spec, which is what I supposed they'd use for Apollo. But they are virtually indistinguishable from the 10E "standard" ones. Ignore my previous comment about the MSC numbers, it does not refer to Manned Spaced Center but to Master Specialty Corporation, the manufacturer of the switch. So nothing to do with NASA part numbering.
@paulcohen1555
3 жыл бұрын
Hi, What is the concentration of the winegar/acetic acid used in PCB cleaning?
@CuriousMarc
3 жыл бұрын
I don't know, same as in a salad dressing I guess ;-) . It would be much cleaner and better controlled to use acetic acid from the chemical store.
@acmefixer1
3 жыл бұрын
White vinegar is already diluted as it comes from the bottle. I believe he poured it straight from the bottle. Just remember to flush away the vinegar with distilled water and dry it thoroughly.
@paulcohen1555
3 жыл бұрын
@@acmefixer1 OK, regular food winegar have about 5% acidity.
@MrArpSolina
3 жыл бұрын
Where can we get that Apollo switch?
@CuriousMarc
3 жыл бұрын
MIne is straight off ebay.
@rivards1
3 жыл бұрын
The Fancy Pants lose points for not being Bell-Bottoms!
@olik136
3 жыл бұрын
this is the Baader-Meinhof phenomenon at work- a few days ago I had never thought about some switches used by the NASA a few decades before I was born... and now I have seen 2 videos about them
@rpavlik1
3 жыл бұрын
It's like a microcontroller with a keyboard and tape interface, and very fancy interface peripherals 😁
@fredflickinger643
3 жыл бұрын
Adding the Apollo era switch was the perfect touch!
@patrickradcliffe3837
3 жыл бұрын
We used those same style switches on the Mk105 minesweeper sleds.
@Enjoymentboy
3 жыл бұрын
If you want real vintage fancy pants you'll have to use a thick, heavy knit polyester fabric for that true 1970's look and feel. Add in a butterfly collar and you will be repairing in style.
@drewduncan5774
3 жыл бұрын
He wears high drape pants. Stripes on them. Yellow.
@lwilton
3 жыл бұрын
Those lighted switches were real nice. The only problem was they were great at peeling your fingernails back if you reached for one quickly and didn't hit it square in the middle. They took enough force to push that if you weren't looking at your hand, it wasn't necessarily obvious if you were pushing on the button front or the metal of the console. If you were half and half, when the switch finally clicked and dropped an eighth of an inch, you fingernail was on the console face and got peeled back a bit. Just a bit annoying.
@CuriousMarc
3 жыл бұрын
Someone's talking from experience!
@tabajaralabs
3 жыл бұрын
so it doubles as a nail clipper?! thats nasa ingenuity! your tax dollars at work :D
@yon2004
3 жыл бұрын
IT'S WHISPER QUIET!
@unixnerd23
3 жыл бұрын
That is so cool. Lovely HP. I briefly worked on 9845s before using 200, 300, 400, 700, etc. series HP boxes. Still have some.
@srfrg9707
3 жыл бұрын
Now you need to build the rest of the mission control room.
@jacoblieberman5138
3 жыл бұрын
Woohoo! Awesome new episode AND magic pants, best day ever! 😁
@compu85
3 жыл бұрын
Wow, that's a lot fancier than just a real time clock. I can see how that would be very nice for logging events with the calculator!
@CraigPetersen12f36b
3 жыл бұрын
I wonder if the HP catalog "magic pants" guy was is either a HP employee or some actor. Might be interesting to see if he is still alive and willing to give an interview.
@mmaranta785
3 жыл бұрын
He would be easy to locate
@timthompson468
3 жыл бұрын
Great video. At first glance that seems a bit complicated, but when I think about what it would take to do the same thing on a modern computer, the old way is much more simple and elegant. One line of code to configure a timer I/O.
@csudsuindustries
3 жыл бұрын
Imagine the uses of a matrix of the switches in a project box. Terminals in the back to expose all the connections. A 4x5 or so. The uses would be endless.
@jimreed3916
3 жыл бұрын
I am amazingly impressed by this series of videos. You could have thrown you hands up multiple times but you kept going and fixed them all. Way to go Marc!
@freshlysquosen
3 жыл бұрын
You earned Adam Savages new "magic blue smoke" demerit badge. lol
@ralfbaechle
3 жыл бұрын
I wish one could still buy a modern variant of these Apollo era switches for modern homebrew projects. With LEDs for lights builtin or tiny screens and optionally a modern bus to digitally query the status of the switch avoiding an extera per-switch cable!
@BlackEpyon
3 жыл бұрын
"You could get a nice beautiful cable, made by HP, but I made my own"... Yeah, so do many of us. Nothing like getting a piece of HP gear for a good price only to discover that you'll pay through the nose for the official accessories. Fortunately, HP stuff is pretty well documented, and it's usually easy to make your own.
@anomaly95
3 жыл бұрын
I hope HP didn't ever try to obscure or restrict info for their stuff. I mean, what's the point? If you sell to engineers, you can bet your bottom dollar they'll just reverse engineer it and make their own accessories to suit their needs.
@BlackEpyon
3 жыл бұрын
@@anomaly95 Pretty much. But they also take into account that said engineers will often design their own interfaces to go between the test gear and the product being developed. Such as designing a header into the mainboard of that product to interface with the logic analyzer so you don't need to bother with all those damn test leads. I designed the PCB for my own isolation network board (resistors and capacitors, with values taken from the HP technical manuals), so the logic analyzer wouldn't interfere with what I was measuring. This comes included with the "official" breakout cable assembly that you'd get from HP to plug into the pod. But good luck finding them cheap. It was easier and cheaper to do it myself. Works with both my HP 16510 logic analyzer card, and the Agilent 54622D mixed-mode oscilloscope I have. Because all the documentation was readily available, designing the interface was easy.
@RaymondHng
3 жыл бұрын
0:42 Those pants are now part of the wardrobe worn by the Norwegian men's Olympic curling team.
@scowell
3 жыл бұрын
Always a please when you do a 'deep dive' series. Can't wait for the next one! Real techs go component-level... you go beyond that!
@UpLateGeek
3 жыл бұрын
LOL @10:55 "Not bad for a small calculator." - CuriousMarc describing a calculator that's literally many times bigger than the PC I'm watching this video on.
@emdxemdx
2 жыл бұрын
I remember dreaming about those Apollo switches (and I recall being very impressed by the HP9825 at a computer trade show around 1979)…
@Ranger_Kevin
3 жыл бұрын
Shame that the merchandise manufacturer does not offer the pants as "Boot Cut" like in the HP picture, but I guess those are just not in fashion at the moment... My dad just dug out his old HP 97 programmable calculator from the attic. The battery was dead (but you can buy modern replacements from ebay), and unfortunately the printer won't advance the paper anymore, because the roller is not sticky enough anymore (not sure if we will be able to fix that - do you perhaps have on of those in your collection and can make a video about it, Marc?). But the calculator itself fired right up and worked, and it also has those beautiful Bubble LED Displays. That thing uses a weird circuit where you cannot use it with the wall adapter if there is no working battery in it, as it uses the battery to pull down the voltage for some reason.
@CuriousMarc
3 жыл бұрын
Rubber rollers and capstans are the bane of vintage electronics. Look up the HP tape episodes, you can probably repair them like an HP tape capstan by coating them with plasti-dip on it.
@riccoharvie4562
3 жыл бұрын
never been first before
@CuriousMarc
3 жыл бұрын
Congrats! You win by more than a vintage HP timer millisecond!
@stupossibleify
3 жыл бұрын
Enjoyed following the clock repair marathon, what a tour-de-force! I'm also so impressed with the HP9825... 1976!!
@jdanielcramer
3 жыл бұрын
Came for the pants...stayed for the pants 🙃
@Herby-1620
3 жыл бұрын
But the vintage pants in your store DON'T have bell bottoms like the picture!
@ronvanwegen
3 жыл бұрын
So, a video about electronic equipment working properly. Well, that's not why I came to this site. When you accidentally drop it off the table please let me know. Until then, good day, sir. I SAID, GOOD DAY, SIR!
@rkan2
3 жыл бұрын
I think the pants are sublimation printed.. You can of course print your t-shirt like that, too.
@RonJohn63
3 жыл бұрын
They can't be Fancy Repair Pants if they aren't made of polyester.
@disposablebasterd
3 жыл бұрын
I bet that is the guy the Fancy Pants song is about
@phipli
3 жыл бұрын
I hope those fancy pants are ESD safe ;)
@brandonhh4111
3 жыл бұрын
we need to find fancy pance, he looks young enough
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