@@BritishEngineer Just for same reasons everything is made with and without automation. For niche products these seem to be - uncommon models for special equipment and/or vintage televisions - it is not economically feasible to invest in automation for such small production volumes. And for demonstration, showing manual production is way more sensible than automated process, where it would be more difficult to get a grasp of what is really done and how.
please understand this show was in production in the 00s with this episode in particular being around 15 years old. the information is going to be heavily out of date
@@technopoptart it's not like it's from the 1940's. We had been manufacturing cathode ray tubes since 1922. I would have expected manufacturers to have heavily refined the process and automated it. But maybe so few are made, even in the 2000's, that it's not worth the money to develop specialized equipment.
@@KrisRyanStallard it isnt about the age of the item though? it is about the overall cost of manufacturing. you are imagining much finer software, much more expensive hardware and much laxer workers' rights than what was reasonable to expect. you are ignoring the cost of throwing away perfectly serviceable tools, demolishing/renovating well-working buildings and firing educated and experienced workers in an effort to be more in line with the aesthetic hopes and dreams of people who are not part of the process. up until the mid 2010's most manufacturing around the world still had a lot of human hands in it. from silk flowers to car doors to chicken wings. why pay 15k on a specially calibrated virtual eye to sort out cracked bulbs and askew bolts when a human can be paid the same price to do that job and three others? it just isnt economical or practical to digitise the process of creating something when it is faster, cheaper(and at the time) less error-prone to have a person do the same work. gonna be frank, a lot of factory work _still_ relies on human hands for the beginning, end and occasionally middle bits of the manufacturing process also, i looked it up, in the year 2005 alone about 130 million crt televisions were sold. it wasnt a niche product by any measure
Something tells me this is a specialty shop that makes "replacement" tubes for antique Televisions. The footage looks recent, the laborious and manual process, looks like a low volume custom tube facility. It would be interesting to see if they have a similar "replacement" color tube factory.
It looked like a large magnetic deflection monochrome tube with green phosphor. So.... yeah, what's it for? Definitely scientific or medical. I think if it were for PPI (radar), the face would be round and the neck would be stronger to deal with the spinning deflection yoke assembly.
@@technopoptart considering CRTs aren't made anymore, saying the footage is recent is relative. As in the last 30 years. While the CRTs being build look like they are from 50+ years ago
I’m so glad Discovery made this video so not only do we know how they’re made, but can help us if CRT’s are somehow in a high demand again. And it also explains why most of them are expensive.
@@jorgetucson8196 Bully for you, Rockefeller wannabe. Some of us are still just trying to survive, and don't have boxes of $$$ to bathe in, smoke, or just use for TP.
They pick the small tubes early during the growing season. Larger CRTs can take up to two years to grow to a full 27" size. Fun fact, if you milk feed a tube on the vine you can grow huge CRTs, this is how prize winning ones are made.
I wish they'd make a more complete video, including how they fit the shadow mask (or in the case of Sony Trinitrons, aperature grill), bond the faceplate to the tube, fix the anode lead in place, apply the aquadag etc... Unfortunately, unless someone has a video of this hiding in their attic, we probably won't get a full video of what it really takes to make a CRT. Damn LCDs an plasmas.
The Aquadag is the black conductive paint you see on the video. I think there's no shadow mask in this model of CRT because it's a monochrome green Phosphor one (i think)
I finally bought my first CRT monitor (JVC with 750TVL) for retro gaming. I love it, beautiful colors, scan lines and finally see exactly how older games I used to play on CRT looked. And even better, no input lag.
@@raverewindit can actually be that high on a big tv set. Usually around 20-30000 volts on a normal sized set, small sets put out around 15000 volts though.
its also the only reference tech of all time. only CRT tvs and Plasma tvs can be calibrated to show an reference image. and CRTs does it better than Plasma tvs.
@@adamrandall2996 the only tv tech that covers the entire light spectrum that humans can see..around 380nm to 720nm this gives reference status still today. natural light gives natural colors. plus CRTs and Plasma tvs doesnt have metameric issues. picture looks different for different observers.
@@thebossnocompetition8757 Wow that's crazy... I've always heard the exact opposite. CRT's technology always impressed me because it's almost alien compared to modern's one... But now I'm even more impressed. For those interested, here's a quick comparative table of the 4 main techs: en.wikipedia.org/wiki/Comparison_of_CRT,_LCD,_Plasma,_and_OLED_displays
@@adamrandall2996 glowing phosphor light allways gives more natural colors compared to LED light that todays tvs are using. Its the same with Plasma tvs. Almost as natural as CRT. Tvs are big light sources i think people forget it. No lighr means no picture. Its the quality of the light that sets how good colors will be. Todays tvs have too intense colors compared to what they should have. That gives this almost plastic cartoon look.
when I saw this video, I miss the memories of working in the ccrt industry with chunghwa picture tube (malaysia) ... closing in 2011 ..after + - 20 years of operation😭
Dude, this is super interesting stuff to me. What part(s) of production were you stationed in? Was the plant open twenty years, or was that how long you worked there? If it's the latter, I am curious about how much automation was used in the process during your time there, from when it was first introduced to how much was involved at time of closing. Sorry to grill ya. Crts are incredible pieces of tech, and to speak to someone that helped build em would be awesome. Wish folks appreciated these things more.
@@SlavicUnionGaming they look best for arcade machines,noting worse than seing some pleb drag out the crt and replace t with a shit lcd screen and consider it a "upgrade"
Looks like a 70° tube, which were common in the mid-50s. For me, this looks like a "Hobbyist-Factory". In earlyer times, it was common to reuse the bulb and only replace the electron-system and (if necessray) the phosphorus (at least in the GDR). In the GDR, TV-repair workshops were commitet to return old tubes to the supplyer. I have some old GDR-TV sets whith refurbished CRTs - recognizable by the welded extension (s. 2:49). In western-germany, this was much less common.
I was thinking about why would you make a CRT in 21st century, but yes it may be a hobby. Because I find that modern robots using to make a no-more-usable product very strange.
@@ugurunver2403 This episode was from the early 2000's when CRTs were still being mass produced. There's absolutely no way that hobbyists would ever be able to make CRT displays.
There is a second type of CRT that this and most things about CRTs never mention. Most CRTs use coiled electromagnets to move the electron beam. But there are other ones which use a pair of metal plates for each axis, so 4 plates in total, 2 for horizontal, 2 for vertical. These plates have a high voltage across them and since it's all electromagnetism, you can control electrons just the same with an electric field as you can with a mahnetic field. It just seems like smaller screens are more likely to use plates. Like something you would find in an oscilloscope. Which if you don't know what an oscilloscope is and you're interested in electronics or TV you should definitely look them up. They are really amazing devices. For something anyone with a couple hundred bucks can buy. But that's the future for ya. I guess Welp the power just went out for some reason so I'm gonna go preserve my phone's battery and get out of this pitch black bathroom lol.
@@duality4y No. CRTs with coils deflect using magnetic fields. CRTs using plates deflect using electric fields. I don't believe they showed any electrostatic deflection CRTs in this video.
@@duality4y CRTs with coils deflect using magnetic fields. CRTs with plates deflect using electric fields. The coiled ones that use a magnetic field are most common. You'd typically come across an electrostatic deflection CRT display in small scale applications such as the viewfinder in an old video camera, or the display on an oscilloscope. Coils are far too bulky for small scale applications like that. And there's no way to effectively generate any significant magnetic field with just a charged plate. Hence no coil, no magnetic field, no magenitc deflection. www.nj7p.org/Manuals/PDFs/Books/MIT-Radiation-Lab-Series-V22-Cathode-Ray-Tube-Displays.pdf
@@duality4y And in case you don't feel like reading an 80 year old, 750 page textbook, CuriousMarc just made a superb video about playing with electrostatic CRTs and describing how they work in detail that is very much up to the standards of his channel. I'd suggest giving it a watch. It goes over everything I described, but shows it all being demonstrated. So, visual demos are always cool. And much more intuitive, at least for me. He even shows the insides of an electrostatic deflection CRT and explains what each part does. So you can (hopefully heh) see that I'm not full of crap. Not to mention this stuff is really cool. But that's just imo. In any case, I hope you enjoy the video as much as I did. ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-zqUlfMmhJQs.html
@@duality4y One more bitesized piece of knowledge if you don't wanna read that textbook again. Texas Instruments put out a CLASSIC application note about the operation of cathode ray tube displays in... I think it was 1983. It explains the operation in detail but is only a few pages long. I think it's a bit of a tease, but again it should reinforce the points I made about electrostatic displays. It's DEFINITELY worth a read if you're the least bit interested in this stuff. It's not long and dry like a textbook. But detailed enough that you come away with a pretty good understanding of the topic at hand. Which is the hallmark of a good application note. www.ti.com/lit/an/snla017/snla017.pdf
I wish they still made these TVs. the new ones are just pure garbage, once it dies, its irreparable! my grandpa has one from the freaking 60s that still works perfectly! He only had to fix it once cause the fly back failed. THATS IT!
Witam i pozdrawiam!!Kompleksowa budowa kineskopu w zakladzie produkcyjnym,badanie pomiary i ustawienie jego parametrow to nie lada sztuka,trzeba duzej dokladnosci i cierpliwosci aby kineskop powstal i nadawal sie do uzytku!!Dobry pokaz Video!!
Way too many kids on here waxing nostalgic for something they barely remember, if at all. CRTs had their pros and cons but it's a technology that's just not coming back in any large meaningful way. They're still out there by the millions right now but once that supply starts to die off it's basically curtains for these tv's, at least within the consumer realm.
So cool. Shame crts have pretty much completely died. I collect and tinker with old arcade machines and it is getting tougher and tougher to find decent tubes for the monitors. You can hack up old tvs for the tube sometimes but even those are starting to dry up. You just can't beat these older displays for retro games
Try going to a recycling center, most of them let you take the TVs for free and they have literally hundreds of them. It's important to know where to look.
Hi Jay, I too have a soft spot for arcade machines, I used to work in the industry repairing monitors , power supplies, boards etc. I can tell you that lunch time was always a lot of fun because the machines that we had repaired had to be ..er.. ahem ..tested :-D. The company I worked for closed so later I had my own business , I still have so much kit , tubes in good condition, some new even, power supplies by the box full , working monitor chassis, coin mechs etc. Sad , but one day I'll have to throw it all away, well recycle the electronics anyway.
@@prepare2qualify111 I've heard of those but there are none near me. It's sad, I have one big CRT and some small CRT monitors. The big one is failing and I want to replace it. It is also a late 90's / early 00's model, and I like the wood grain of the 70's ones.
Try putting up signs around your town "free CRT disposal" it sounds crazy or desperate, but that's a good way to find them. Certain goodwills/savers/Salvation Armies don't allow them but some still carry them. Try your local dump, if they allow visitors. There should be at least one recycling center somewhere near you (maybe a drive away but still there). Or, just try asking around. I'm sure some of your relatives or friends relatives should have some, usually older folks. Never pass up an opportunity to get one, if you see one on the side of the road then take it. I volunteer at my local recycling center and my dad has gotten to his limit and won't let me take any more home. It's heartbreaking to see all of these wood grain/retro/space age/potentially useful CRTs get processed into scrap and not be able to do anything about it. You could also check online. Don't use eBay as those are full of scalpers who charge too much. Try uncommon sites or craigslist, maybe try searching the net for individual people, many of them just want to get rid of them and don't want to pay to recycle them. They would charge practically nothing. I wish you luck in your searches!
Also I wouldn't through away your broken one, try to find someone who can fix them or try to learn yourself. You could also use it for parts to fix others. Good luck!
@Blake Belladonna yeah i wasnt looking. no deflection plates. was looking at the green phosphor so maybe a computer terminal. we had a scope at college that size for teaching. it probably used coils instead of plates or it would have been huge long.
Well, why should the newer and inferior technology be cheaper? They want people to buy it, so pricing it as expensive is a great way to fool consumers into desiring it.
This is like late 1940s level of CRT manufacturing. In the later decades, there would be incredible advances in manufacturing of the tubes, allowing prices to come down. By the 1990s, they were mostly made by machines.
This has to be a speciality shop making limited run tubes for specific replacement usage. An actual assembly line at the height of CRT usage wouldn't have had guys in lab coats and immaculate laboratory conditions.. This is more like watching someone currently making Nixie tubes by hand (which would have been an unworkable option when they were in wide scale usage).
What they did not tell you, the thickness of glass has to be very thick and strong along the front screen part, CRT tubes are subjected to a very high pressure from the outside, as the tube has total vacuum, i.e. all the air is extracted by a powerful pump, there is no air left in them, so now you can work it out how much of the atmospheric pressure is acting on the front portion of the screen, a 25" diagonal CRT screen which roughly means approximately 20" x 15" rectangular screen occupies a surface area of 300 square inches, each square inch is subjected to atmospheric pressure of roughly 15 lbs (pounds) per square inch, so total pressure acting on that screen is 4500 lbs! that is approximately 2000 kilograms that in itself fascinates me. And don't forget the screen has to also take a lot of abuse as many people thump the poor thing when watching a programe that turns out disappointing, like if you were watching football, and your favourite team lost, you would probably punch the screen! And the other fact is we cannot see electrons, yet we have a mini hadron collider in the tube, where we emit tiny unseen particles, called electrons towards the screen and strike a phosphorus coating that emits a light when struck by electrons, and thereby prove that electrons exists, and that they can be boiled off a negatively charged cathode and accelerated to near enough speed of light and strike the screen, where energy is given off, if we were able to set up sensors all around the tube inside, we would have been able to detect many other particles given off when electrons strike the phosphorus screen, we would have been able to detect Higgs Boson, without having had to spend 2 billion Euros building that big particle accelerator, all that could have been done inside a CRT, probably your smart phone camera can capture higgs bosons emitted by your old 26" CRT TV. And don't forget using 10 to 15KV volts anode voltage, you would have been subjected to a fair amount of X-rays being emitted off as well, but these days we are exposed to a lot of Microwaves as most iphones now work on Microwave frequencies of 2Ghz or more, that is the same frequency our Microwave oven uses to cook food, though the doze we get is a lot weaker, but over a long period of time our brains are being slowly defrosted. But remember biggest revolution in science came from a bull, we first used a bull to use its mechanical energy, to run mills, do the farming, mine the minerals, drive bull carts, enable man to invent millions of other things so all started by a bull, we owe it to a bull, animals must be respected.
"we would have been able to detect Higgs Boson, without having had to spend 2 billion Euros building that big particle accelerator, all that could have been done inside a CRT, probably your smart phone camera can capture higgs bosons emitted by your old 26" CRT TV" I don't know what you're smoking, but the particles in the Large Hadron Collider are 10,000,000,000 times more energetic than in a CRT electron gun.
The weirdest part about CRT tech (and a lot of old analog tech) is how much more complicated it really is down at the basic componentry and mechanics. Like, LCDs and the pixels that have to be manipulated in them, the fundamentals make sense. Cool, got some RGB sub-pixels deflecting light from a backlight source at different levels off an excited liquid crystal layer that combine to form one single color to the human eye. Crazy, but you can wrap your head around it. But a freaking ray gun, set in a vacuum tube and offset hundreds of thousands of times per second over a general area of horizontal lines with magnets, just… my god. Watching that amazing video of the Slomo guys looking at how Mario gets refreshed on a CRT is just, like, na man. Too much. Too much tech. Yet we look back and it’s apparently the most primitive form of moving picture technology. I’ve always been obsessed with display tech and have a pretty cool collection of gizmos i build myself that use everything from Nixies to VFDs to LCDs to LEDs to OLEDs to Plasmas to blabla… but CRTs take the cake for “brain exploding imperfect analog concepts somehow mastered to be reproducible at scale”
I like the way they look, I managed to fit an LCD screen inside a CRT I found on the side of the road. Smashed out the back of the tube and it fitted right in.
It was worst when CRT was new, because the newer a technology is, the harder it is to get use to it, and before you know it, as soon as you're used to a technology, it immediately is outdated and replaced.
@@bob4analog manual work is so unprecise, slow and expensive, why're you saying it is not a bad thing? robots are so much better at precise repetitive tasks
@@jskratnyarlathotep8411 - And why didn't you use a robot to build your circuit here? ---》 ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-EMYZhwP7rio.html
These monochrome tubes have, in fact, nearly infinite resolution (only limited by the size of the phosphorus molecules and the diameter of the electron ray). There are no pixels.
@@martinschroederglst couldnt you theoretically use a rgb color filter that uses the persistence of the image in the human brain like a dlp projector for example?
Hi hello. I would like to know what has become of this cathode ray tube since when it was new? Have you made either a computer or a television with this object? Please thank you.
My dad refurbished TV Picture Tubes. I remember when he placed the tube on a lathe and installed the guns. I also remember when he placed them in the ovens.
Where is the shadow mask or apature grill if your Sony, its only monochrome tube in video, still cool thinking electrons are shot out from a cathode and accelerated to hit phosphor by 28 kv on most 21-37 inch crt tellys, got a CRT projector s going.
I think it's interesting that someone saw a Cathode Ray Tube and thought... We can adjust the angle of this beam to produce light in a line that can go across Horizontally and move down a whole screen with enough accuracy to produce thousands of colors while doing a whole screen 70 times a second to produce an image. like holy cow, makes LCD look easy.
the wacky displays people came up with before CRTs are even wilder, look around youtube for "nipkow disk mechanical TV", it makes an image using just a disk with some holes in it and a light source that can be modulated
A color TV set that used a CRT and magnetic deflection is one of the most complicated devices ever mass produced. For example, the CRT had three electron guns (red, green, blue). The screen had phosphor dots of three different colors, again red, green, and blue. The beam of each electron gun could be allowed to hit only the phosphor dots of its corresponding color. And the beams from the three guns had to be swept in unison over the entire screen about 60 times per second while keeping each beam precisely aimed at the corresponding phosphor dots. It is/was a sophisticated system by any standard you wish to apply and is made no less amazing because we now have solid state devices that can do the same job in a more straightforward manner.
First up the rescan rate was 25 frames not 70 and then only half a screen at a time IE interlaced scanning, people like you are ignorant and spew vomit talk of nostalgia like you are an expert yet know nothing... Yes I use to fix TVs.
I like crt TVs better then flatscreens. the scientific principle behind it is way cooler then flatscreens. flatscreens is nothing more then a bunch of tiny lightbulbs to create a image. a crt tv uses electro magnets to steer a electron beam rapidly scanning the screen. when you blink a CRT tv probably scanned the whole screens 100 times before you open your eyes. crt tvs seems to last alot longer then flatscreens and dead pixles is impossible for crt tvs.
By trying to figure out how to get a very thin and uniform coating on a surface. Vacuum deposition is a technique used all over the electronics industry.
@@johneygd I was on the bus once, and Grace Hopper sat next to me and started giving me grief "I invented computer programming you know" and off she went. Couldn't shut her up "COBOL this" and "FORTRAN that" and "none of this C++ nonsense". Luckily for me Marie Curie got on with Hedy Lamarr, they could see my predicament and told me the bus driver wanted to check my ticket, which was a lie to prise me away from Hopper's infuriating computer speak. Hedy and Marie asked me to sit with them and ask me what I thought of their Radium powered torpedo. I pointed out a few flaws in their plans and said "if only we had some kind of liquid as white as paper that could be painted over these errors. A voice from behind suddenly said, "sorry I couldn't help overhearing, I am Bette Nesmith Graham and I have just invented the very thing you need. It's called liquid paper and I just happen to have a bottle, here have some". Unfortunately some guy stole their entire research budget and spent the money on diesel powered nuns. They were a disaster and he died penniless. I may possibly have made some or even all of this nonsense up.
Worked for 30 years for SYLVANIA TV OTTAWA OHIO. this is a black and white tube the colour needs 3guns and 3typs of phosphor. With mask to aid in alinement of colours. Thanks
@@19seventy97 America ships old tv's to India. They rebuild them for sale anywhere but the US. Here's a trivia tidbit for you. You now how flat screens have a resolution quality rating? Do you know the resolution of a CRT? .etinifnI
That could come in handy, I have a small but growing CRT collection and would need re-gunning in the future (if used often) perhaps I could get them regunned if needed in the future. CRTs are either 405 line (Black and white 1960s and before sets) or 625 line - black and white aswell as colour, but I think that they would be 480
The environment wouldn't really be in a worse condition, they'd make the same amount of waste a LCD would. Plus we don't need video games to be ultra-realistic and suck all the time out of our lives. I've actually played my XBOX One on a 1970s CRT and it's easily do-able. Plus, if they were still in production, CRTs could easily progress to give a better picture. HD CRTs exist. The only draw back to CRTs really is their size - but even then most TVs (if not on a wall) are in a corner where a CRT would go easily.
This is of course a monochrome tube - colour ones involve some extra components, and a different way of applying the phosphors (plural). Plus, I think this one is for a special application, as it looked green, rather than illuminant C or D ("white") as used in (monochrome) TVs. (Hard to tell as we only saw it operating very briefly.) (Why twice, once with and once without sound?)
And the repeated is without sound. How does this get 8+K likes!? wow! And this isn't even history. Back in the early days of CRT use and early TV, there were no "robots" to do the work. There's a much better video about RCA picture tubes that is more robust.
Interesting that cathode ray tubes display just a generic light green color when the electric connection isn't sourced from the core of a TV/computer monitor which allows it to display something else. This can be useful for photography and portrait making rooms too. R.I.P Cathode Ray Tubes 1879 - 2010.
@@newspooiechannel my old HD CRT has HDMI port for PLAYSTATION 4 :D you can rock XBOX one or Playstation 4 on a REAL HD CRT with HDMI port v1.0 it has a slight geometry issues but SONY got lazy at the end BUT not noticeable I had another one that had Perfect Geometry but my shit face uncle got rid of it
Cathode ray and x Ray are same or not. ??? Are electron gun produced some ions which can ionization of air so all the effect of sanitation become easy ????? For viruses and fungus ????
