Comment by deadbabe
2 days ago
Is it true we just don’t really have the technology anymore to build a CRT? We’ll never see a new CRT ever again, unless it’s the passion project of some billionaire?
2 days ago
Is it true we just don’t really have the technology anymore to build a CRT? We’ll never see a new CRT ever again, unless it’s the passion project of some billionaire?
Industrially, it's very nearly a completely lost tech.
Last I heard the only new-production of electron guns for CRTs was one singular source in Russia, but that was before the war started.
Even preservation of already-manufactured CRTs is difficult.
The last CRT rebuilder in France closed years ago. Some folks purchased some of the equipment and tried to get it set up at the Vintage Television Museum in Columbus, Ohio, but ultimately failed. It's in the care of a dude in Maryland now but is not in production status.
AFAICT, the singular remaining entity presently capable of working on existing picture tubes is Colorvac, in Germany: https://colorvac.de/service/
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In the unlikely event that new CRT production ever ramps up again, it will be a lot like the reboot of Polaroid film was: So much institutional knowledge will have simply evaporated that even though the new product works, it will never work exactly the same as it once did.
Thomas Electronics in the US supposedly still makes and repairs CRTs for military and aerospace, but those will be much smaller than you'd want for a TV or monitor and often if not always monochrome. Even if they did make big colour tubes they wouldn't give mere mortals the time of day anyway, they're in it for the big money contracts.
https://www.thomaselectronics.com
Thanks.
I think I may have already known that at one point, but I'll try to include this the next time I am motivated to brain-dump some CRT lore.
Given the lifespan of CRTs and no hope of repairs, when should the last CRTs be expected to die forever?
They're pretty stable just sitting in a box in a warehouse.
I forecast that none of us reading this at the end of 2025 will live to see the last CRT.
Not true, you can make one yourself by hand if you want to, it just won't be very high quality:
https://www.youtube.com/watch?v=_PzoAReMXOE
If you want a good one, you'll need the materials, machines and skills to make good ones. Probably not too likely unless you like building factories for fun and no profit.
I think it’s more that the production lines that existed to build them in volume have all been long dismantled, so it would be prohibitively expensive and all the people involved would be doing it for the first time.
And even if you found the money to resurrect the production lines, modern regulations probably wouldn't look too kindly on making new consumer goods with several pounds of lead in each unit. Better set aside your morals and enough money to buy some politicians while you're at it.
The tubes start generating X-rays above 5kV or whatever(some docs say 15kV), and you need leaded(literally Pb melted in) glass for the screen to block it, unless you could find a substitute material(Sn nanoparticles or something) or you're fine with <5kV brightness for the tube whatever that amounts to. So you can't pitch it as a nicely eco friendly product, and the glass can't be easily recycled(Pb removed from glass).
Otherwise they're not THAT complicated. They're a lot like lightbulbs. Certainly not as exotic as LCDs.