That’s the cutest tiny CRT I’ve seen in ages! Even the yoke, flyback & high voltage lead are all miniaturised like doll house furniture & accessories stuff. LOL
I got a small CRT like this one, taken from a camcorder I found in the trash, and after playing with it for several months, I used it as a monitor on a tube audio amplifier for the purpose of monitoring clipping levels to prevent distortion. I took advantage of the fact that tubes already use high voltage and filament voltage. I only added a small amplifier for the yoke and an oscillator made with a simple neon lamp for the sawtooth. Very simple, and without the need for any synchronism since it is only to see if the signal peaks are clipped or not. It's a nice decoration on the front of the amplifier that attracts the attention of everyone who sees it...
I just about lost that watch last week. Caught it on the trunk of a subaru, and it ripped the band apart, but it is stainless steel, so I just straightened it, and popped it back together. Good as new. Love this old watch. Had it for years. Solar powered and received the time signal from radio station WWVB
I remember watching a video somewhere, someone took 3 of these, a prism from an old LCD projector with color filters and made a rudimentary color projection setup.
Reminds me of the old days when Pacman was THE game and the CRT would get burn-in and all we could do was try to rejuve the tube. And don't forget to discharge the tube before replacing it ! Atari had great games but the x-y vector components were a real problem. Thanks for posting !!
Love the video, and this one really paid off, I had plans on tearing down my old 8mm cam-corder that has been in the closet for 20 years or more, now, perhaps I shall look at selling it. I had thought it had zero value, and wanted to take that little CRT out of it to play with, but if I can get a few bucks out of her, well I can always use a few bucks!
That viewfinder has a lot more electronics in the one I took apart and modified to take video. It was pretty easy, it took 9VDC and video in. The other pins would make little spots appear on the edge for the various things like battery low and such when grounded. The tube in that appears to be the same size as on the one I had. I didn't think to flip the yoke wires around to flip the video around.
If that is the case it will be easy to test if there is xray out of those little tubes, just a tiny dentist xray film and a revealer . Those comes covered in plastic, so, no normal ambient light can go in. But xray. Then do the daek room thing and see what happens.
That monitor was used on the Sony HVC 2200 camera that I had. You could actually detach this little unit and with an extension cable watch the video image from a distance. I believe the length of the extension cord was ~ 10Ft.
Remember an interview i had with a co that made airport x ray machines... They had been working for ages trying to rev the pic - i said - Just rev the scan coils.... They said "can you start on monday !!!
Well this is a magnetic deflection tube so it is pretty limited as to what it can do. Not really usable as a scope tube. They use electrostatic as they are much faster. Magnetic works over a limited frequency range because well you have basically an inductor right.
thats a big one. i took apart some viewfinders some time ago. a few of the crts were magnetic delection and others hv plate deflection ones, the smallest square one was like 1.5x1cm and the round ones with deflection plates had like 1.5cm diameter
Yes this was from an old camera. I did a much smaller one in the next video, and I am sure I have some electrostatic deflection tubes around here. I have a few other very old cameras to check out and see if the viewfinder still works. This one is the same tube that was used on the broadcast ENG cameras of the day. Will do about 800 lines resolution if you give it that much, and of course put the HV higher.
I've been meaning to make a little battery powered monitor, I've got 4 or 5 of those things. I have a dxc m3 with it's viewfinder... tube is at a right angle so I guess it might be exactly what you were talking about regarding x rays. I have been using it rarely, only as a monitor by removing the lens and looking at it from far away (it's not really tiny). So any x rays would have room to scatter some in this case, hopefully that's ok but it would be neat to see a real test of that. I know in the photocopier industry they used to use selenium imaging drums that gave people cancer who were polishing the drums. Damn chemicals and rays are bad when they get loose!
Doesn't the mirror mean that the image will be reflected 90 degrees, while the X-rays will carry on sideways, off into space? So they wouldn't be aimed at the operator's face? That's surely an advantage of doing it that way, indeed that could possibly be the reason for the mirror, rather than having the tube simply inline with the eye.
@@12voltvids Why would the X-rays be reflected like that? Aren't most rays likely to either pass through it, or to hit the mirror and have their energy absorbed as heat? The glass is likely a thin sheet, with a metal coating applied with some high-tech method. X-rays aren't reflected by glass, and the thin metal coating will do basically nothing. The mirror doesn't make it more compact! It'd be just as compact to have the tube inline with the operator's eye. The compactness depends really on the design of the camera in general. Having the tube, with it's cathode pointing off into empty space (excluding the mirror and plastic housing, they don't mean much to X-rays!), then the mirror reflecting the useful light, is a great and simple solution to the problem "how don't we cook the operator's face?" while allowing the picture to pass through unmolested. It's like using a prism or a filter to only allow certain wavelengths through, except spread a bit wider across the EM spectrum.
@@greenaum Sure does make the viewfinder smaller. I have cameras with straight and mirror reflected viewfinders. The xrays don't just leave through the face of the tube they leave through the bell of the tube as well and in the case of professional cameras they run the 2nd anode voltage very high to create a very small spot for focusing. You need lead to stop xrays. Other metals will just reflect and scatter them into your face. The angled viewfinder was done to make the camera smaller and allow the view screen to be rotated or adjusted for left or right eye
re cancer, I was just surfing youtube watching clips of restored vintage 405 line tv's from the 50's (UK) and someone posted a comment about cats going to sleep under the stands of these tv's and saying they would get tumours
Its true about TV monitors , being close to it is bad enough , I have felt it my self , it takes time . As anyone see n any lines on these camera scopes ? I have seen them on TV tubes but not cameras I no longer watch TV anymore , all glowing screens do this , even your little phone .
Interesting to see this little view finder repurposed into being a little monitor !! Sorry to hear about your old friends passing away !!!!! really makes you wonder about technology and our health, I think the next big thing will be about microwave radiation from cell phone systems, WiFi and the new 5G Cell/wireless systems !!!!
Low resolution... High resolution b&w tube? Such thing does not exist. They will go up in resolution by as small you can focus the point, and as much vertical frequency you could squeeze into the height of the tube and still be able to fit it all.
When you have a camera with a CRT viewfinder, the tube is at a right angle to the eyepiece with a mirror reflecting the image. Now, if you look at how an actual X-ray tube works, the X-rays are generated at a 90-degree angle to the anode... exactly the way the viewfinder CRT would be arranged, and right next to your skull.
The scary thing is the 2 guys I knew both had brain tumors but it was the location that was really scary. The studio cameraman, that spent all day in the studio looking at the viewfinder (3 news casts, and a live talk show every day) had his tumor in his frontal lobe, and the ENG operator had his on the right side closest to where the view finder would have been. Coincidence?
12voltvids nope. Those little B/W tubes didn’t use leaded glass either, because they weren’t designed to be run at voltages that could generate x-rays.
@@12voltvids the thing that surprised me is that these "occurences" took place as recently as 2002! You would have expected this to have been picked up in the design stages given the the technology available when these were made?
I'm not quite sure but I don't think x-rays will reflect off of 45 deg mirror. not much stops them. They tend to go straight though. Factors my be frequency and power of the x-rays and probably what and how thick the backing on the mirror is. Just a thought. i'm no expert in that field.
That’s the cutest tiny CRT I’ve seen in ages! Even the yoke, flyback & high voltage lead are all miniaturised like doll house furniture & accessories stuff. LOL
Yes even im not a girl
I got a small CRT like this one, taken from a camcorder I found in the trash, and after playing with it for several months, I used it as a monitor on a tube audio amplifier for the purpose of monitoring clipping levels to prevent distortion. I took advantage of the fact that tubes already use high voltage and filament voltage.
I only added a small amplifier for the yoke and an oscillator made with a simple neon lamp for the sawtooth. Very simple, and without the need for any synchronism since it is only to see if the signal peaks are clipped or not.
It's a nice decoration on the front of the amplifier that attracts the attention of everyone who sees it...
That old school watch tells me you are a legit electrical guy. +1. Subscribed.
I just about lost that watch last week. Caught it on the trunk of a subaru, and it ripped the band apart, but it is stainless steel, so I just straightened it, and popped it back together. Good as new. Love this old watch. Had it for years. Solar powered and received the time signal from radio station WWVB
Build a tiny cabinet and turn it into the world's smallest Arcade machine :D Incredible little device. Very cool, thanks for sharing.
That would be a challenge to play a game of Pacman on. Although I do have one of those tiny OLED Pacman games I bought off of Amazon.
Now that I think of it. Camcorders kind of tossed a hint at what would replace a CRT for the most part with that really nice viewfinder upgrade.
I remember watching a video somewhere, someone took 3 of these, a prism from an old LCD projector with color filters and made a rudimentary color projection setup.
I had a Sinclair tiny tv, spent many hours staring at that tiny crt, I'm still alive forty years latter!
Reminds me of the old days when Pacman was THE game and the CRT would get burn-in and all we could do was try to rejuve the tube. And don't forget to discharge the tube before replacing it ! Atari had great games but the x-y vector components were a real problem. Thanks for posting !!
Love the video, and this one really paid off, I had plans on tearing down my old 8mm cam-corder that has been in the closet for 20 years or more, now, perhaps I shall look at selling it. I had thought it had zero value, and wanted to take that little CRT out of it to play with, but if I can get a few bucks out of her, well I can always use a few bucks!
I love your wrist watch!!
That viewfinder has a lot more electronics in the one I took apart and modified to take video. It was pretty easy, it took 9VDC and video in. The other pins would make little spots appear on the edge for the various things like battery low and such when grounded. The tube in that appears to be the same size as on the one I had. I didn't think to flip the yoke wires around to flip the video around.
Never would have thought of reversing the yoke wires. Thanks.
This is adorable.
6:40 " ... produce some smoke ..."
I just died lmao
If that is the case it will be easy to test if there is xray out of those little tubes, just a tiny dentist xray film and a revealer . Those comes covered in plastic, so, no normal ambient light can go in. But xray. Then do the daek room thing and see what happens.
That monitor was used on the Sony HVC 2200 camera that I had. You could actually detach this little unit and with an extension cable watch the video image from a distance. I believe the length of the extension cord was ~ 10Ft.
Remember an interview i had with a co that made airport x ray machines... They had been working for ages trying to rev the pic - i said - Just rev the scan coils.... They said "can you start on monday !!!
Awesome. Cant wait till goodwill opens today..LOL
Maybe a modulation monitor for your HF rig?
Well this is a magnetic deflection tube so it is pretty limited as to what it can do. Not really usable as a scope tube. They use electrostatic as they are much faster. Magnetic works over a limited frequency range because well you have basically an inductor right.
thats a big one. i took apart some viewfinders some time ago. a few of the crts were magnetic delection and others hv plate deflection ones, the smallest square one was like 1.5x1cm and the round ones with deflection plates had like 1.5cm diameter
Yes this was from an old camera. I did a much smaller one in the next video, and I am sure I have some electrostatic deflection tubes around here. I have a few other very old cameras to check out and see if the viewfinder still works.
This one is the same tube that was used on the broadcast ENG cameras of the day. Will do about 800 lines resolution if you give it that much, and of course put the HV higher.
I've been meaning to make a little battery powered monitor, I've got 4 or 5 of those things. I have a dxc m3 with it's viewfinder... tube is at a right angle so I guess it might be exactly what you were talking about regarding x rays. I have been using it rarely, only as a monitor by removing the lens and looking at it from far away (it's not really tiny). So any x rays would have room to scatter some in this case, hopefully that's ok but it would be neat to see a real test of that.
I know in the photocopier industry they used to use selenium imaging drums that gave people cancer who were polishing the drums.
Damn chemicals and rays are bad when they get loose!
The CANON MV750I also has a small one of those CRT tubes.
And with this, you gain my subscription.
Now this is cool! Great video.
Time display?
Possibly.
De qué cámara es el visor
I have one like this. I just wonder what kind of camera and signal I can use to connect to this one. Can you answer me? Thanks
It just takes a standard video signal. Monochrome or color it doesn't care.
Is it possible to convert the viewfinder to colour?
I just see some static text? How hard can it be , just to get some real moving picture ont that thing?
The reason you see static text is because I had it plugged into a character generator. If I plugged it into a video source you would have video. Duh!
There was a moving picture when he plugged in the camera!
Awesome =D So tiny!
Doesn't the mirror mean that the image will be reflected 90 degrees, while the X-rays will carry on sideways, off into space? So they wouldn't be aimed at the operator's face? That's surely an advantage of doing it that way, indeed that could possibly be the reason for the mirror, rather than having the tube simply inline with the eye.
No the xrays also bounce 90'. The reason for the mirror is to make it more compact
@@12voltvids Why would the X-rays be reflected like that? Aren't most rays likely to either pass through it, or to hit the mirror and have their energy absorbed as heat?
The glass is likely a thin sheet, with a metal coating applied with some high-tech method. X-rays aren't reflected by glass, and the thin metal coating will do basically nothing.
The mirror doesn't make it more compact! It'd be just as compact to have the tube inline with the operator's eye. The compactness depends really on the design of the camera in general.
Having the tube, with it's cathode pointing off into empty space (excluding the mirror and plastic housing, they don't mean much to X-rays!), then the mirror reflecting the useful light, is a great and simple solution to the problem "how don't we cook the operator's face?" while allowing the picture to pass through unmolested. It's like using a prism or a filter to only allow certain wavelengths through, except spread a bit wider across the EM spectrum.
@@greenaum
Sure does make the viewfinder smaller. I have cameras with straight and mirror reflected viewfinders. The xrays don't just leave through the face of the tube they leave through the bell of the tube as well and in the case of professional cameras they run the 2nd anode voltage very high to create a very small spot for focusing. You need lead to stop xrays. Other metals will just reflect and scatter them into your face. The angled viewfinder was done to make the camera smaller and allow the view screen to be rotated or adjusted for left or right eye
DUDE one of these installed into a pc case for a CPU temp readout or something would be COOL
Crazy story!
Can i buy?
You want my little 1.5" crt monitor?
@@12voltvids yeah i can make a nv telescope out of it
I have too much time on my hands and college is barely a challenge
re cancer, I was just surfing youtube watching clips of restored vintage 405 line tv's from the 50's (UK) and someone posted a comment about cats going to sleep under the stands of these tv's and saying they would get tumours
rip cats
Get a small AV IR camera and an IR flashlight. Then you have a "night vision" scope
Nahh you didn't...naaaaa...noooo waaaaayyy..... DAMN you DID! priceless !!!
Thats from a camcorder actually Edit: from a sony camcorder
Its true about TV monitors , being close to it is bad enough , I have felt it my self , it takes time .
As anyone see n any lines on these camera scopes ? I have seen them on TV tubes but not cameras
I no longer watch TV anymore , all glowing screens do this , even your little phone .
You couldn't have felt it, and mobile phone screens are illuminated by LEDs, which run at 3 or 4 volts. No X-rays there.
Se puede comprar éste crt
cool
Nothing new I did that with two of them and hooked them to a pair of glasses 5 years ago
The two I had wear only inch an half long that one is big
Interesting to see this little view finder repurposed into being a little monitor !! Sorry to hear about your old friends passing away !!!!! really makes you wonder about technology and our health, I think the next big thing will be about microwave radiation from cell phone systems, WiFi and the new 5G Cell/wireless systems !!!!
No, because microwaves aren't ionising radiation. At worst they cause a tiny amount of heating.
I have a mini CRT I can send you if you want
I do collect them as long they have the circuitry with them so I can test them out.
@@12voltvids it does have the circuit and wires. How can I send you a picture and you can see if you are interested.
@@jcamp3606
You can send a pix by email to. Volt@telus.net
@@12voltvids Sent
Hey I have four nice camcorders I would let go for cheap, interested ?
“Trinitron tube” 🙃
Trinitron was Sony's color tube. This is monochrome so no, not a trinitron.
Low resolution... High resolution b&w tube? Such thing does not exist. They will go up in resolution by as small you can focus the point, and as much vertical frequency you could squeeze into the height of the tube and still be able to fit it all.
Your would have to do so much research to rule out coincidence in those sad cases.
Convert it to Google Glass)))
When you have a camera with a CRT viewfinder, the tube is at a right angle to the eyepiece with a mirror reflecting the image. Now, if you look at how an actual X-ray tube works, the X-rays are generated at a 90-degree angle to the anode... exactly the way the viewfinder CRT would be arranged, and right next to your skull.
The scary thing is the 2 guys I knew both had brain tumors but it was the location that was really scary. The studio cameraman, that spent all day in the studio looking at the viewfinder (3 news casts, and a live talk show every day)
had his tumor in his frontal lobe, and the ENG operator had his on the right side closest to where the view finder would have been. Coincidence?
12voltvids nope. Those little B/W tubes didn’t use leaded glass either, because they weren’t designed to be run at voltages that could generate x-rays.
@@12voltvids the thing that surprised me is that these "occurences" took place as recently as 2002! You would have expected this to have been picked up in the design stages given the the technology available when these were made?
I'm not quite sure but I don't think x-rays will reflect off of 45 deg mirror. not much stops them. They tend to go straight though. Factors my be frequency and power of the x-rays and probably what and how thick the backing on the mirror is. Just a thought. i'm no expert in that field.