Smallest round CRT in the world and it works

[@IBEGDL]

incredible miniaturization of the crt module. that is something that is no longer seen in the current technology

[@12voltvids]

Correct. I like these little tubes. They are cool just to look at. I like vacuum tube amps too. Not only do they sound great but they look cool glowing away on the top shelf of the stereo stand.

[@tyronenelson9124]

That explains why back in the day where the high frequency whine came from within the camera, the viewfinder? iv'e always wandered about that

[@jacobdavis000]

I remember that high pitch 16khz horiz osc tone when I enter a room with a TV on. It's a memory now. One could tell when there's a TV playing nearby, even if the audio is turned down all the way.

[@Davijosafazulk.]

There was a seal on the tube indicating that it is made in Japan so this very small engineering is very interesting

[@12voltvids]

Here is a link to the worlds smallest full color CRT TV kzbin.info/www/bejne/g6qpn6SqmtJloKc

[@unfundedopportunities7278]

Back in 1974 the smallest b&w CRT was in Space 1999's comlock communicators. A marvel at the time.

[@12voltvids]

UnFunded Opportunities That was probably a prop

[@williamsquires3070]

12voltvids - and probably the display screen on a Star Trek tricorder (from the original series) was as well. Even if you could manufacture one (back then) that small that worked, it’d be too fragile to be useful as a stage prop. If they did have any episodes that showed anything on the “display”, it was probably done post-production w/green-screen techniques; ditto for Space 1999 (or the soon to be released Battlestar Galactica.)

[@unfundedopportunities7278]

The original prop was designed around what then was "the world's smallest TV screen" (the 1971 Panasonic TR-001, 1.5"/35mm across) - from Wikipedia

[@MidnightVisions]

This is the working Space 1999 prop. 1971 Panasonic TR-001. The screen is 1.5"/ 35mm across. catacombs.space1999.net/main/models/w2pcomlock.html

[@peterjensen3162]

Ohhh I so much wanted one of these back in the days.

[@joseph9770]

I remember being awestruck back in the day when I took these types of video cameras apart. Wish I had the forethought and maturity when I was a kid to save them. Later on in my teens I had a little color one that I managed to power up and get a composite signal on from my c64. I remember having the idea of using one to make a miniature oscilloscope but for whatever reason it never happened. :-)

[@omsingharjit]

4:30 Why ??

[@minecraftvillager5793]

Small cathode ray tube i like it

[@Bluethunderboom]

I didn't know this smallest CRT Tube is roundie one like all of its vintage CRT TVs do have roundies two. =)

[@stphinkle]

I am guessing it is a composite video signal or something.

[@stevenfox7378]

Wow, amazing tech, love it. Great video.

[@MrDsmen]

I cant believe my eyes, I have pulled this exact bw crt just now out of a completely ruined plastic crap sharp vl-n1s best 5 bucks ever spent

[@ashave9100]

I bought a panasonic camcorder back in 1992 and I paid extra for a color viewfinder

[@joeyallen1609]

I know this is an old video, but did you figure out what the brown and white wire are for?

[@waltschannel7465]

Cool!! These are all really neat tubes! Thanks for doing this series of videos. The rectangular tube appears to have several "thumbwheels" surrounding it. Am I seeing that correctly? Centering magnets maybe?

[@12voltvids]

Walt's Channel Yes and it has an ion trap like all modern tubes. So when it is powered off the spot does not hit the center of the screen it bends to the top left.

[@paulstubbs7678]

I have several viewfinder CRT's, one sits at the side of my bed and automatically turns on when someone comes to my front door. I have a very small Sony unit, however i think the one in my Sanyo 8mm camcorder is smaller. Being 8mm I'm not overly willing to open it to find out what it is. (even though the camera is faulty)

[@shaun9107]

Carnt help watching this , those little tubes are fascinating .

[@12voltvids]

Well you will probably enjoy this one I did last December when I got my hands on the worlds smallest color TV. kzbin.info/www/bejne/g6qpn6SqmtJloKc

[@shaun9107]

Yeah ive seen it , I use my CASIO TV-6500 for video camera instead of the CRT . This little TV cost £90 back in the late 90s at DIXONS in the UK . I wanted it back then but not for £90 , I payed £5 second hand after the TV digital switch over The picture is smudge for the price , not sharp at all but it works for a view finder , or just a monitor .

[@MsCori76]

Imagine watching a full movie on them, the eye strain would be terrible after awhile.

[@macgvrs]

It is just amazing to look at the small LCDs we now have in our cameras and such. How things have changed. I wonder what type of display is next?

[@12voltvids]

LCD screens are still pretty low res. The best ones use OLED screens. My 2 ligh end cameras use OLED for the eyepiece viewfinder. My cheaper camera I use for the youtube uses an LCOS or DLP tyoe o technology as you can see the bias light hitting the area that borders the image, and if you shift your ele you get the color strobing that early DLP projectors had.

[@macgvrs]

True but at least they are larger and easier to see. One of the cameras I have is able to give me a decent idea of what the picture is going to look like which is all I care about.

[@12voltvids]

My FDR AX100 has both the flip out 3" screen and an OLED eyepiece. Considering that I am at the age where reading glasses are needed for close up work, I find the oled eyeplece is what I use, as there is a diopter adjustment so I don't need reading glasses to focus on that one. If I am on sticks then the flip out is fine as I am generally more than 18" away and can see that fine but closer than that and it gets fuzzy. Oh well, better than it was 8 years ago before I had lasik. I needed glasses for everything beyond 18". Now I can see perfect, no glasses needed except for 2 things. Fine soldering, and splicing fiber optics.

[@gordo8189]

Hey 12VoltVid - interesting video.. What Panasonic camcorder did that round-tube monitor come from? I think I'll find one on eBay. A Raspberry Pi Zero is about the same size and has composite video out. I'll build a Pi plus the monitor into a small acrylic case, powered by microUSB. A button (or optical sensor, capacitive sensor, dry reed etc. inside the case) could cycle round TV test patterns, ctr-clock, old b&w episodes of Doctor Who etc. I'll send you a photo when I"m done if you like....

[@rogertyler3237]

They Never Nail Me For Copywriter.

[@BloodAsp]

WOO, I am excited for this!!!

[@muffinman3111]

Mine looks exactly the same I’m just starting mine out !

[@12voltvids]

They are kind of cool as a conversation piece. This one and the rectangular one i looked at before are mounted in a clear plastic box, with a usb cord to power it up and a video input jack. I can plug into a phone charger and feed a video signal for demonstration. They both display the same image. Most of these went in the trash with the broken camera so there aren't many working examples left.

[@topgearIQ]

I have one of this but not work direct with source voltage need to connecting to camera board..

[@breandanvallance3107]

I have one of these that I thought might be electrostatic because I couldn't see the coils. But they were just hidden under a metal housing that looked like part of the tube

[@12voltvids]

Have to admit that they are pretty cool. Similar in size to the vidicon tubes in old cameras.

[@clifffiftytwo]

I bought a Sony Handycam to rob the CRT from the viewfinder and the joke's on me - the viewfinder was just a telescope - no electronics! It's a neat item from 1985, video-8, just not what I wanted.

[@12voltvids]

Cliff Miller Was that the ccd m8 by chance.

[@clifffiftytwo]

12voltvids It is!

[@12voltvids]

That is a record only camera. No play back ability. It was sold as part of the pack 8, which had a separate playback unit. (I have the player from the set) The shop I worked at back in 1986 had a bunch of these cameras and we would rent them out for like 30.00 a night. Pretty much every weekend all the cameras were rented out. We never rented out the player, so the customer would get the shop to copy the tape to VHS for them when they returned with the camera. I think we had 5 of them that were rented pretty much every day when Expo 86 was running, and then it was a weekend thing. They would sit there all week, and go out Saturday as they got it till monday. They all got trashed. I remember taking one and mounting it to the bumper of my car and driving around and recording for about an hour.Mounted it in the grill between the fog lights on my old Mercuer XR4 Ti. Now that I think about it, I wonder if I still have that tape. Will have to look and see if I can find that one.

[@litzdog911]

Wow, I have a Sony TR-81! It hasn't been used in probably 20 years. Wonder if it still works?

[@coolestman8261]

I would love to see a CRT re builder try to work on this

[@12voltvids]

I would love to see a crt rebuilt period. I used to send to a placed called kinex in Burnaby BC but they shut down 25 years ago. They were one of the few that did Trinitron tubes.

[@zx8401ztv]

Babys bigger brother, stil cute though :-D Oddly i only expected a rectangle screen, the round face just reminded me of the first old tv's with a round screen. Then the oscilliscope jumped into head, dam heavy beast, i nearly fell over with the weight of the thing in my head :-D. I have an old analog cossor scope and it's still a heavy sod, it's not even valve/tube based. Also a Telequipment and a micronta analog display scope, can't have enough scopes. The telequipment one was always breaking down when i needed it, bad joint city inside. I have fixed so many joints that it's actually become reliable lol.

[@12voltvids]

Come October I bet there will be a ton of joints SMOKED here in Canada. The only smoke from joints around this place is from the rosin in the solder when I fix one.

[@zx8401ztv]

Yep me too. Some flux can smell really sweet, odd that. I had a father that drunk alcohol a lot and took drugs, it programmed me never to follow his ways, i'm tea total.

[@12voltvids]

zx8401ztv I had friends that went down that road. I saw how it messed them up. I know there are plenty of folks that are just counting the days till they can buy it in the store on oct 17 but myself I will just walk on by. What scares me is those that will take and then drive. Lawyers are already running their hands together in anticipation of a booming business once the driving while high charges clog the already overloaded courts.

[@williamsquires3070]

Okay, I have to guess, then, that the “other” side of the heater (filament) is connected to the cathode?

[@XiaomiRedmi2017UA]

Hello! Who knows, what's model name of this CRT?

[@GoldSrc_]

One of the CRT viewfinders I have, had red cable as positive and I think brown or yellow as negative, I almost blew it up because of that. No idea from what camcorder came from though, but they were evil by using that choice of colors.

[@edgeeffect]

Jeri has a good guide here kzbin.info/www/bejne/op_OgqOYiteDgq8 on how to determine which lead is which without as much risk.

[@GoldSrc_]

@@edgeeffect Thanks, will check it out.

[@woodysgeekchannel2204]

How do I determine what is the power and ground wire is. I have 1 out of a sony and one out of a sanyo. Also going to become a patron supporter. Love you channel. Is patreon your preferred route?

[@jonka1]

If there is an electrolytic on the board you could try checking continuity from it back to the input wires. This will also indicate polarity.

[@user-yb4qr7dk2j]

Hi, greetings from Russia I connected the viewfinder to the videcam, and the picture is looks like out of sync, what can i do with this? How can i synchronize viewfinder with cam?

[@12voltvids]

First make sure that the viewfinder you are using is actually a composite sync model. Some used external sync from the camera. Most were standard composite sync though, so a coupling cap may be at fault.

[@sokauo]

I've done several IR night vision with severals crt like that but the quality turned out prety bad... I don't know what to do with them now.

[@Andrew_Sparrow]

Did you figure out what the other connections were for?

[@12voltvids]

Nope, don't care. More than likely for timing the on screen graphics. One would be for the red light on the front facing LED to let people know you are recording. The other 2 would most likely be h and v timing signals.

[@antechquario]

hi, about input audio..how can you adapt for ear audio?

[@matthewbestdfghy]

Can we see the bullet car chase on it.

[@johneygd]

Interesting ,especially with that mask on it.

[@matteoredigolo3149]

Which viewfinder have you used?

[@12voltvids]

It came out of a Sony camcorder.

[@matteoredigolo3149]

@@12voltvids model?

[@12voltvids]

@@matteoredigolo3149 ccdtr7

[@rogertyler3237]

Funny SONY Had Mashoosta Make That Tube For Them. It Funny SONY Didn't Make Their Own Xtube.

[@BloodAsp]

Would you be able to tell us how you get a video signal to the CRT? I am not sure what it requires.

[@waltschannel7465]

heyou Standard NTSC video is available from a VCR or DVD player as an RCA Jack labelled Video.

[@12voltvids]

heyou I just put a composite video signal into the video in wire. It has on board processing. You need only 3 wires. Power ground and video. The shield of the video is tied to ground.

[@raccoon681]

can you game on them though?

[@12voltvids]

Sure why not.

[@EzeePosseTV]

12voltvids - Do you know much about Samsung plasma TV's? I have an issue with it as when certain white colour tones are on screen, loads of tiny red spots appear on said white areas on screen. Other than that it's a perfectly working TV.

[@user-cs1cq9fq9s]

i have one of those

[@nazarlive2137]

Monetr camra Av in

[@edgeeffect]

Erm.... if you don't want to get nailed for copyright putting KZbin on your little CRTs.... put one of your own videos on it???? Put "the world's smallest CRT" on it?????

[@user-xp2yt4qn2c]

Crt for hamster

[@12voltvids]

It's a conversation piece nothing more. I have 2 of them in a small transparent plastic case powered by a usb charger and video port that feeds both. Just cool to look at what we used to take for granted as the view finder on 80s camcorders.

[@dilnawaz001]

Like

[@JWimpy]

Another very interesting video. Here is a picture of that tube out of the module; i.imgur.com/XBtvlm9.jpg

[@missionpassed4584]

Wow you could put a pair of them into binoculars, pretend ur out bird watching etc but we would know better lol

[@abc-ni9uw]

Yea right 😒

[@TungPham-ku7xf]

Can you make a video about lcd in the viewfinder?