Thread 2922432

what's the possibility of making your own crt tube? is working with lead glass really that dangerous?

>>2922432 (OP)
it's a huge vacuum tube and not just a simple glass bulb, it's basically impossible without a tremendous amount of specialized equipment and knowledge which mostly doesn't exist anymore.

>>2922432 (OP)
for you? 0% chance

>>2922432 (OP)
I saw a project a long time ago where someone was able to DIY a simple CRT oscilloscope by using a vacuum pump to pull the air out of a wine bottle and painting the bottom with phosphour. I think lead glass was used to protect people from radiation, not because it's an integral part of a CRT design.

There's more to a CRT than just the vacuum glass though. You need a thermoionic heater to produce electrons, electron gun to shoot them, deflection yolks to focus them, and all the electronics to run those.

>>2922435
High vacuum is routine for specialised industrial applications. Many universities fo it as standard laboratory equipment.

>>2922441
Take that insult as a challenge.

View the development of early phosphour tubes. Early CRT's and television receivers. Much of the problem lies in trying to make the tube square. Early television receivers wirked fine with CRT tubes of a distinctly rounded format.

>>2922432 (OP)
You do not need lead glass as another poster has suggested
>>2922474

Learning basic techniques of glass blowing would go a long way to diy vacuum tubes and CRT's or even neon disays.

>>2922518
don't you just blow the bubble into a square mould?

>>2922432 (OP)
cant you just get a penis pump and put a screen on the cock hole? swedish made picture tubes

>>2922432 (OP)
>crt tube
>cathode ray tube tube
Is that some sort of dispenser for cathode ray tubes?

>>2922637
OP suffers from RAS Syndrome.

>>2922435
>it can't be done
>it's gone forever
Kek. Come on, mate. Don't you understand what an enormous meme you are right now? You do understand they still manufacture this tech, right? Not only that, but many of the old CRT techs are still refurbishing them and China's even selling new ones online.

>>2922518
>Take that insult as a challenge.
not an insult, a statement of fact. the fact that OP asked a question like he did indicates he does not have the skills, money, and equipment to do it.

>>2922649
>You do understand they still manufacture this tech, right?
name one plant that makes CRT's.

>>2922649
reading comprehension much?

>>2922714
I bet you are fun to have around at parties. Unlike a homebuilt / CRT. Now that would be fun to show functioning.

>>2922732
it might be fun at a party full of people who give a fuck about that. but most people don't give a fuck about someone remaking old tech.

either way he's not going to make a crt, and me being fun at parties is just retarded attack when you don't have an argument.

dont let memes be dreams fren. Mold that glass and suck the aur out it youre halfway there. Its that shrimple. Be very careful not to get shocked and die though.

>>2922855
Leave this thread. You are being vulgar.

>>2922474
He probably used a wine bottle so as to withstand the vacuum forces. An interesting option might be to purchase a laboratory conical flask. Versions of these are made specified for vacuum use with thicker walls. Some even have a side arm.

>>2922432 (OP)
Depends on your expectations and how hard you are willing to try.

https://www.youtube.com/watch?v=ESwj-VXjDtY

Not sure if they are still around, but a few years ago there was a Chinese CRT electronics kit. They gave you a small monitor and you soldered all the electronics together to get it working. So might want to look for that.

https://www.youtube.com/watch?v=cRr6OTpLGD8

As for making the CRT itself that is on a whole other level with chemicals, vacuum pump, etc. Even if you could do all that you still need the electronics to drive it, so start there.

>>2922715
https://www.thomaselectronics.com/manufacturers/

ok now what

>>2922432 (OP)
what do you mean by CRT tube? the cathode ray tube itself, or the glass "tube" (screen) for displaying signal?

>>2923373
Contact them then, it's almost guaranteed they are no longer doing this. However if they are that would be pretty cool

I've been getting into crts the last year, and nobody produces crt anymore the one sold in china use old NOS tubes they just make the pcb and most don't even come with the frame, also we have the knowledge to make brand new crt and I know people that also own the equipment to do so the problem is that making a new crt requires a lot of skill and other resources, nobody has the time, skill, resources or effort to do that is just not worth it, especially because it's never going to be a good one or comparable to low end models

>>2922474
>wine bottle
Use Jim Beam bottle for square screen, it's litterally in the name

>>2922649
>You do understand they still manufacture this tech, right? Not only that, but many of the old CRT techs are still refurbishing them and China's even selling new ones online.
Naysayers of the naysayers always pop up saying this but in actuality it's true that nobody can make color CRTs anymore.
There's some military place that repairs military CRTs, there's plenty of hobbyist techs that can fix pro/consumer CRTs, and it's technically possible for someone to make a B&W CRT in a lab, but color CRT's will never be made again.
It's hard for normies to wrap their head around, but mostly due to economy of scale they will never be made again. I figured this all out ten years ago and stocked up for a lifetime.

>>2926224
Unless there was some sort of breakthrough that caused people to want CRTs again. "Lost" technology is never lost, it's just no longer financially viable. It will be "found" again as soon as someone finds a viable market for it.

>>2926226
LG developed a flat crt screen right when the crt market collapsed but seeing how people are shifting their focus towards refresh rates and how "fluid" their watching experience is i can see that tecnology make a return in the gaming market

>>2922432 (OP)
It's not outside the realm of possibility as far as would someone be able to figure it out. People build airplanes and other insane shit on their own. This will be much harder. I think someone with enough knowledge, drive and access to fabrication tools could build the equipment needed to make one. The bigger problem is the quality. I think if anyone were able to make one at home it would probably run like shit. It would be a long and resource intensive thing tomake even one, how many are you willing to make before you figure it out, assuming you don't kill or maim yourself in the process.

>>2926261
Until someone invents a plastic CRT I'm pretty sure they're never coming back.

>>2926277
Glass is not as expensive as it may sound, back in the day you could buy crt for really cheap and i'm talking brand new ones. Beside we went leagues ahead in glass making we produce millions of screens made of glass for phones, tablets ecc.

>>2922441
What about me?

>>2926277
Doubtful.

>>2922432 (OP)
>what's the possibility of making your own crt tube?
Zero, without industrial equipment.

>>2922432 (OP)
Blowing the glass and vacuuming isn't that bad.

Even getting a phosphor on there you can probably do

Getting color phosphor on there and a shadow mask is fucking crazy and yours is probably gonna look like shit.

>>2922432 (OP)
>is working with lead glass really that dangerous?
Not at all, since the lead is contained in the glass. You should really be worried about what the lead is protecting you from: xrays caused by the beam hitting the phosphors

>>2926261
I love my CRT's but I doubt they'll come back. OLED with BFI and the fast LCDs with backlight strobing are getting very close to CRT motion clarity.

>>2926847
There's old crts monitors that have been modded to output at 500hz and even more, you can find videos on youtube about it, we are far from crts full potential back in the early 2000 and late 90s 4k crt where already a thing. The main strenght that could make crt return is the fact that as of right now is easier to make a high refresh rate crt than a high refresh rate lcd or oled, once the factory is set up you could make high refresh rate crt and sell them forte same price as any standard lcd or oled, bot to mention the response rate of crts

>>2923362
>a few years ago there was a Chinese CRT electronics kit. They gave you a small monitor and you soldered all the electronics together to get it working
Sometimes the chinese are pretty cool.

>>2926282
It's not a matter of cost, it's a matter of weight. There's some things you can do to try and get a little bigger screen size out of a given size of CRT, like rear projection displays, but nobody wants or will ever again want a 15" monitor that weighs 50 pounds.

>>2926945
You be surprised at how many people don't care, but you are right weight is the main problem especially for shipping, I bought 10 crts and only 1 arrived without any problem cause by shipping

>>2922432 (OP)


It's not glasswork that's hard, it's making an electron gun/power tube that is hard.

>>2926945
>it’s a matter of weight
Can confirm
>have CRT
>heating lamp/bulb burns out
>not worth repairing (why the fuck are heating bulbs 300$?)
>have to haul a TV that weighs 50+ pounds down the stairs of a condominium

>>2922432 (OP)
>what's the possibility of making your own crt tube?
https://www.youtube.com/watch?v=XmAPdJDjfOA

>>2926268
A good way to start would be to construct a raster display using a CRT oscilloscope. You could prototype much of the circuitry attaching it to oscilloscope for the CRT tube and HV drive.

>>2927168
>It's not glasswork that's hard, it's making an electron gun/power tube that is hard.
What's a power tube?

>>2929766
* No need to mod the oscilloscope BTW.