TELEVISION: HOW IT WORKS 1952 CORONET INSTRUCTIONAL FILM CATHODE RAY TUBE ORTHICON XD39134
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- Опубліковано 6 жов 2024
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This black-and-white educational film from 1952, “Television: How it Works” was created with educational collaborator Marvin Camras and produced by John Smart. The film explains the science of TV signal transmission. Credits (0:18-0:29): “Educational Collaborator: Marvin Camras, Senior Physicist, Armor Research Foundation, Illinois Institute of Technology, Sound RCA System.” Fade up on skyscraper with TV tower viewed from street-level (0:29). Door labeled “control room - no admittance” (narrator: “inner sanctum of a television station”) (0:40). Two men at switchboard pressing buttons (hands) (0:40). Young man in button-down shirt switches on home TV set (0:55). Zoom: screen. Flipping through TV channels: view of harbor (“news”), man performing on stage (“entertainment”), two people conducting physics experiment using bell (“education”), man diving in front of audience (“sports”), woman displaying stove and oven (“advertising”). Now on set of same kitchen commercial (1:34)-we see woman acting in front of camera while technicians operate. Actor is handed prop (poster: “see it at your local dealer”). Camera manually zooms (to display poster). Narrator begins explaining electron beam and its role in transmission over footage of hand turning off TV receiver, leaving faint mark on screen (1:54). Blank receiver tube, then cartoon of same (2:07). Diagram: “cathode-ray tube,” including “cathode” / “electron gun” which shoots stream of electrons at tube’s face. “Fluorescent coating” glows when struck to produce images. A technician takes apart TV camera on set of kitchen commercial (2:49). Cameraman pulls out image orthicon tube from behind lens. Zoom: technician holding tube, then tube with label (“image orthicon”). Diagram overlays image to explain physics, including: “electron gun” firing electrons to “target,” which receives signal via “lens,” which receives signal via “sensitive plate” (therein varying magnitude of electron beam, which returns back to gun). Single white dot appears on screen, then black dot; they merge to form grey dot (3:49). Return to diagram of camera tube, showing how image of dot is captured via lens on plate, setting up charge on target (depending on brightness), ultimately changing electron beam returning from firing electron gun. Changed beam is amplified and sent out by tube (latter not pictured). Diagram of transmitter shown, with camera / cameraman at right. Signal (depicted by arrows) reaches amplifier, which combines signal with carrier wave generator for transmission off-screen (4:27). Moving line representing signal (i.e., image being transmitted) shown moving up antennae and then being radiated out in concentric waves (4:39). Receiver antennae on roof of house (4:47) receives signals from waves. Signal travels downward through lead-in wires inside. Same tube receiver diagram from before shows electron gun firing at screen, displaying image of dot (4:56). Words appear on screen detailing process in order with simple illustrations: “image of light,” “electricity,” “transmitter waves,” “electricity,” “image of light” (5:12). Grey dot again (5:35). Man appears on TV, then moves, juggling ball, racket, plate on stage (5:39). Words appear explaining how reading is good analogy for transmission of moving pictures (5:51). TV camera tube diagram, this time transmitting actual image (6:05). “Deflecting coils” (6:11). Electron beam moves across plate line by line. Sync generator with electrical pulse constituting “video signal” (6:53). On tube receiver diagram, electron beam sweeps across screen systematically, producing image (7:08). Camera tube / receiver tube diagrams shown side by side with electron beams moving from image / across screen in sync (7:37). Image produced by interlaced scanning on actual receiver (7:55). Man shown juggling while narrator explains that sound comes from FM radio (8:00). Multiple television towers shown with clouds moving behind (8:47). Narrator explains: high frequency waves cannot move beyond horizon (reception is limited). High shot of city, panning across (8:56). Hands holding coaxial cables (to link transmitters) (9:07). Zoom: wire / tube arrangement. Relay station in field. Horn-shaped antennas (to boost signal) (9:15). Man juggling again (9:33). Family in sitting room watching TV (9:43). Men at switchboard (9:57). In family room (living room), shot slowly zooms on man juggling on TV. Narrator emphasizes vocational opportunities in television (10:04). Words “the end” framed by TV screen (10:18).
This film is part of the Periscope Film LLC archive, one of the largest historic military, transportation, and aviation stock footage collections in the USA. Entirely film backed, this material is available for licensing in 24p HD, 2k and 4k. For more information visit www.PeriscopeFi...
It’s still mind blowing how this all became possible.
it really is. we all think we're smart, but the men who invented all this electronic stuff - they're smart.
And it's all becoming lost to the ages. Just like nobody knows how to make steel in the U.S. any longer, the detailed knowledge of radio & television technology is going to the wayside.
@@JDnI2813 🍒
@@JDnI2813, yeah man!!!
That's what I believe.
@@martinlutherbling424 Employees and a few years of
At 42 yrs old I still believe that EVERY man in America sounded like this back then.
Yeah, see...why i oughta....
@@SuperBoomshack golly...gettin all sore on me...now you run home to your folks and tell 'em what ya done. 🤣🤣
@@CarolFitzpatrickk Why, you nincompoop, knucklesandwich is what your gonna get, see...
@@CarolFitzpatrickk 🦈
this is actually what is known as the mid-atlantic accent. it used to be considered proper diction for polite american speech. then it was pretentious [think frasier in the 90s], then it disappeared.
the words "Coronet Instructional Films" made my grade school experience flash before my eyes
I thought the same thing😂😂
I'm absolutely amazed at how much more educational these old films are compared to today.
Glad you enjoyed it! Consider becoming a member ua-cam.com/video/ODBW3pVahUE/v-deo.html
Doesn't it seem that modern entertainment panders to infantilism? It seems that modern public discussion centers around quick conclusions, that the only way to be smart is to be quick in judgement.
Films like that were produced for classroom learning by Coronet en mass in every subject area. Some were not as well done. I recall back to my childhood when teachers would send someone to the A/V room to fetch a TV and VCR on a cart and roll it into the classroom. Much more exciting than listening to a teacher 😂
people were better educated back then- before the dems took over the school systems. The US has fallen from #1 in the world (1972) to #27 in education today.
I wonder how much these videos may have been shaped by using so many films to help train GIs in WWII on topics they might have little knowledge of. These days, we may take previous knowledge for granted.
As great TV is I can't imagine life without the radio. Both are fascinating inventions.
I have to agree with you because I have a radio in my kitchen that I never turn off and I have a ghettoblaster in my bathroom for when I'm in the shower and getting ready for work. I have a TV in my recroom that is only used for a couple hours as night. I'd say I could 100% live my life without a TV but I'd hate to live without a radio and laptop!
@@michaeljohn9263 right on sir!
Picture radio as people called it back in the day.
@@WaybackTECH yes sir and it really was. When Orson Wells read The War of the Worlds on Halloween? Powerful stuff.
After reading a lot about early radio, it's far more responsible for unifying the U.S. than television. For the first time the entire nation could hear the President say something, the whole nation could hear the same music and the same programs. That was the dawn of a new era.
I've read countless tech articles, but this is one of the best and most easily understood explanations of how TV works that I have ever encountered.
They were able to explain things in better back in the day for some reason. The term “in laymans terms” is extinct these days for some reason.
I didn't start watching black and white TV until I was about between 2 to 5 years old at that time between 1960 and 19 62 or 3. So basically what it actually means is when I started watching black and white I was really watching fluorescent. Because back in those days we used to have small television sets that were black and white or in this case fluorescent. Now I know the difference between fluorescent and black and white. But they still come out the same.
Better than Technology connections?
🦆
Narrator voice is exactly what I expected.
Take a Good look at old Mr C. Ray Tube hard at work. What a charged worker. Only seen 2 minutes into the video so far lol
I was expecting Troy Mclure.
I was surprised everyone wasn't smoking
Amazing how technology is ... even as far back as 1952 !!
Featuring the number one hit show of 1952: "Man juggling"
One of the best thing about living in the Philippines is I can still use my grandfather's cabinet type black and white TV because we still have analog broadcast here even though we already have digital.
By 2023, Analog Television in the Philippines will be extinct
@@darwinqpenaflorida3797 I'm guessing it is just a probable date. Knowing the Philippines when it comes to tech related changes, its always extended. The previous estimate to change to digital broadcasting was on 2019. Even now we are still in the testing phase.
Ahh...good ole analog B&W TV...my deceased uncle used to avoid color TVs because he thought he was getting a triple dose of radiation from the electron "guns".😂
Well....... he IS deceased. Maybe he was right.
Just kidding, sorry for your loss.
might have been smarter than all the others.
My dad was a radio and tv repair man working for a company……..he put up tv antennas in the 1950s…….
I love these old instructional documentaries.
I recall seeing such documentaries in school when I was a kid. Long time ago. That's when I learned the most on any given subject.
Good one here.👍
I used to love staring at that little dot in the center of the screen until it completely disappeared. Does anybody remember an outer dial around the channel dial that you would sort of push and turn in order to sharpen the picture?
Yep. That ring was actually the fine tuning adjustment, since the clicky channel dials weren't very precise.
The sharpening effect comes from how the TV picture signal is structured. It's very wide, about 4mhz. (think about your FM radio dial, with a different station every 0.2Mhz!) If the TV is slightly out of tune, then the top or bottom of that 4mhz area will get clipped off, and all of the details of the picture that were stored in it are lost.
Thanks for the explanation! It WAS like tuning in a radio station to get the clearest sound when we actually tuned in stations with dials.
I have no better understanding of how a CRT television works than I did 10 minutes 32 seconds ago. It is still way over my head. Of course, the technology is altogether different today.
Call me a "boomer" I really don't care. I am not into the big 80+ inch TVs with multiple speakers offering theater sound. I do understand some people are really into that kind of entertainment.
I grew up with five VHF and two UHF channels. Cable didn't come to our part of the desert until I was an adult. When I was about 10 years old, Dad bought a console television. This was a TV unit with built in speakers on either side. The top opened up to a stereo and turntable. The whole think weighed as much as a bank vault but was hot stuff in the mid 1970s. It offered a deep sound that I miss today. You have not enjoyed an episode of the Rockford Files until you watched and listened through a console TV.
Of course the picture and sound of today's television are more to life, I still miss the old console television.
Because I’m a weirdo I use a 27” CRT TV in my bedroom. It’s not a console TV though, it’s a late 90s TV. So not really the same experience. I’m 17 and I’ve had CRT TVs in my room for a few years because I’m strange, basically I find them in the trash, fix them, have them for a few months, something breaks, and I get another one. I want to get a hold of a nice wood paneled TV from the 70s or 80s, not quite a console TV but a nice unit with a primitive remove, a rounded screen, and a nice chrome bezel
@@charlie_nolan You'll be amazed what you will find, especially with those old sets. I got lucky and found a wood paneled TV in an estate sale a few years ago. It was 20 dollars. Try large antique stores as well. There are shops online that specialize in them, but they are expensive. It's better to find one and re-do the wood finish yourself, and add the bezels and stuff yourself. As far as making them functional, if you know how to fix a CRT, you will do just fine. Spare parts are tricky, but they are an internet search away. The hardest part for me are the speakers, as some of them have corroded wiring and were made custom to put inside the television unit. I have a good audio friend and he was able to get mine to work. Have fun!
@@charlie_nolan one of the things I have enjoyed with "The Crown" is the accurate portrayal of the evolution of TVs from the 1950s on. Unlike "First Man" where the Astronauts were watching an early Russian spaceflight on a Samsung TV.
@@twoquickii1330 I already know a place I might be able to get some. I’m just waiting until my TV dies or I get rid of some other stuff first. I’ve repaired a couple 5” CRT TVs already, I like analog electronics despite the inherent annoyances
It explained it very simply. It draws a line across the screen which changes brightness as the original image does. Stack those lines up and you get a picture.
The TV Camera tube explains so much as to why television was exclusively live broadcast back in the day. There were so so many less middlemen between the camera in your TV so the machines could be simpler.
Wow, what a great educational video. It's really extraordinary how it works.
A wonderful film that concisely describes how analogue tv works, i worked in the service trade all my life and this takes me right back to those days of steam tv, of hot valves small pictures and welcoming customers ready with a cup of tea and cake, just as long as you could fix the box in the corner, I've just built a standards converter to supply my own tv restoration projects with those pictures of light.
Amazing Engineering
My first video camera (early 1980s) had a tube as it's pickup. The camera had to be connected to a heavy "portable" VCR that you carried via a strap. (actually you carried HALF of a VCR, as the part with the tuner stayed home attached to the TV). This, kids, is how we shot video before camcorders! Did it suck by comparison to ANYTHING post 1985? Yep. Was it STILL better than 8mm film...Heck yeah! Now I can shoot 4K video on my phone. Still make better videos with a DLSR though.
I have an brand new SEARS unit sitting in it's box right now. One day I plan to use it. The focus ring is very nice feeling.
@James Slick I have seen it at some event around 1985 here in Pakistan
I'm curious if DLSR was a typo on your part and you meant DSLR, or if DLSR is an actual term and I'm ignorant of what it means. If it is what you actually meant, please educate me; if it was a typo, so what? We all make mistakes
@@Rangerman9404 yeah, it's a typo. Of course I mean DSLR. ☺️
@@jamesslick4790 Thanks for the clarification. I didn't want to call you out and have it turn out that I was wrong
It still boggles my mind how someone figured this out.
started out as mechanical TVs and fax machines, where they realized you could do this. The rest was just trial and error with persistence, luck, and Farnsworth.
@@ThatManOverThere You are actually correct about luck. Someone making a camera target left it in the oven too long and the surface cracked into thousands of pieces like a mosaic. They still tried it in a tube and found it to be a huge improvement as unlike previous targets the charge didn't leak away.
@@MrDuncl I know, is why I said that as half joke half sometimes science is someone making so huge of a mistake that it comes around the other end and becomes a positive for humanity.
Just could it be the old Prometheus thing Only electronics rather than fire & Satan's boys rather than mythological boys !!!
@@jerryshunk7152 you thinking projected reality perpetuated through eternity to seperate us from "eden" heaven different frequency dimension?
"Mr. Smith won't be in today, so lets watch this educational film" Said every substitute teacher I had.
Today i understood about the working principals of television and cameras very clearly. Thank you very much.
Wow! A new technology of having moving pictures in your very own home. I hope this nifty technology will catch on.
I don't. It'll be tougher to get the kids out of the house. The Mrs. and I want all the "alone time" we can get !
The control room and studio sequences were filmed at WGN-TV in Chicago (note the camera at 1:35).
Yep! Owned by the Chicago Tribune, The "World's Greatest Newspaper", A slogan that gave WGN those memorable call letters!
@@jamesslick4790 And the building they show the top of at 8:48 is the Tribune Tower in Chicago.
@@trainliker100 Yep!
And then they developed color TV. Now our big, flat, wide screen TV’s work completely differently with no tubes at all.
What about the transistor which made the flatscreen possible. For half a century there were CRT TV's with solid state components
She,s wonderful light..from this film 1952 if you peeled back too 1920 its fascinating to the first true channel it wouldn't make difference if picture was fuzzy or bw its prideful moment...now days everyone can have their own channel.but. The 1st True channel was HISTORICAL...Thank you for posting
I remember having a black and white portable CRT TV in my room as a kid. It got pretty crappy reception but I still considered myself lucky to have it. Remember how statically charged these old living room TV screens used to get? You'd put your hand against the screen and hear it crackle and glow in the dark lol. Of course after seeing what happened to Carol Anne, we sat a bit further from the TV from then on.
Wow! The good ole days
Value of $1,000 from 1952 to 2021
$1,000 in 1952 is equivalent in purchasing power to about $10,323.28 today, an increase of $9,323.28 over 69 years. The dollar had an average inflation rate of 3.44% per year between 1952 and today, producing a cumulative price increase of 932.33%.
In the UK, £1000 in 1952 is the same as £29425 in 2020. Inflation has averaged 5.1% a year, producing a cumulative price increase of 2942.5%. (source: Bank of England inflation converter site).
That one!unusually,your calculation drive me nuts
Which explains why only TV stations could afford them back then. No mention of color in this film but it has been said that first color receivers cost as much as the van that delivered them.
That’s a expensive tube lol
@@MrDuncl that and color TV hadn't been invented yet, when this short film came out.
*Legal....A Televisão realmente é o canal entre o povo e a tecnologia desde sempre*
This explains the electronic TV system. The first TV system was a mechanical one, involving a spinning Nipkow disc that scanned the image. This system was invented in England, by John Logie Baird, in the 1920s. EMI's Electronicam system was invented shortly afterwards. The BBC did test broadcasts with each system, to decide which one to use for its network. EMI's system was far superior to Baird's.
Video recordings of the earliest tests and broadcasts, recorded on 78 RPM records, still exist.
In the 1930s, Germany had its own TV system. The screens were tinted yellow, so the images were in black & green.
LCDs seem to work so much more simplier yet CRT's are much more complicated, we had to learn the hard way first.
You noticed that too ? It's like we discovered the hard / complicated way to do it first. But... Without computers and micro L.E.D.'s... we had to go the "Stone Knives & Bear Skins" route first.
@@martinlutherbling424 are you kidding? LCDs are way more complicated. They're full of trillions of microscopic parts.
Pretty cool. I remember these from years ago
I was 5 years old when my family bought our first tv in 1951. I remember getting up at 6 and finding out that there was nothing on yet.
Just the test symbol
What impresses me is that the narration aptly describes the power of TV to influence. This reaction to what is viewed is both voluntary and involuntary.
This is very high tech, so imagine how high tech today's stuff is; mind boggling
Good to know the evolution of tv starting from CTR tv to HD,LED,QULED and others.
It's amazing try to make a television. Out of absolutely nothing but the elements around us I guarantee no one including myself can it's cool how GOD gives man the brains to make amazing technology out of nothing
You Rock,thanks for your work my friend!
The amazement of man
I wish the term Orthicon would have caught on with others. my family never called it a television or the tube a crt, etc. we always said “what’s on the orthicon” or “stop staring at the orthicon all day”, etc. people never understood what we were talking about. btw we got our first color orthicon in 1968
Do you cook meals in a magnetron or do you use a klystron? 😂
The orthicon was one type of camera tube. It replaced the "iconoscope", and itself was superceded by the "vidicon". The RCA name for the receiver tube (CRT or "picture tube") was "kinescope".
My parents called the refrigerator an Ice Box. They grew up during the Depression and the Ice Box had a huge block of ace in it.
@@Cleveland.Ironman Never saw a domestic one with a klystron
My grandparents always called it the idiot box.
thanks for sharing this 🙂
It's amaizing,fascinating,it's nature,it's human being,it's godly like,it's mighty,it's beyond explanatory,it's life.where we come from as human beings,to these modern age technology,it makes me feel so special and lucky,just witnessing the world and universe progressions,it's adorable,it's almighty 'GOD' given such wonderful talents to his creatures,I love life,thanks God for brought me in the world,and gave me much time to continue witnessing your mighty glories,Amen. greetings from East Africa Tanzania 🇹🇿
What a great film! I saw this in high school in the 70s and we laughed. I saw it today and got misty. Time brings wisdom.
Want to know more about this subject in modern terms? My channel is currently running a series on the restoration of a batch of black and white TV cameras from the 1972 era. There are almost 300 videos on my channel concerning many aspects of vintage television electronics.
Post a link to your website.
What a stroke of genius!! Imagine 40 years before this and not having any idea you'd be able to watch people in real time 400 miles away. I wonder how someone had the idea to create this. I mean how did some get the idea to do this process to produce moving pictures called video.
I remember those antennas everywhere in the 80s. Between that and later satellites beaming signals directly to your TV. Television had saved countless lives for millions of reasons. It has also advanced science, society, education
Read the story of Farnsworth.....he came up with the concept at age 14.
Yes but the real magic was radio, imagine starting from nowhere and trying to send voice across the aether, telly is just an extension of radio, just my opinion of course.
@@jefffoster3557 Along with Farnsworth, the concept of remotely drawing lines to create a picture goes back decades earlier to the first very slow fax machine.
@@scottlarson1548 not electronically transmitted though.....huge difference.
@@jefffoster3557 It's not a huge difference in the technical sense. The function of radio is to control a voltage in a receiver and that's what both of these are doing.
George Stone, an NBC Chicago staff announcer, narrated this film.
Television will never catch on. Nobody cares about video entertainment whatsoever.
I bet someone would try and get these video things to be shared on some interconnected network.
It's a fad, it'll never catch on.
Now I really want to learn more about television.
Today's television has replaced the picture tube with a Liquid Crystal display composed of several layers of glass and plastic.
Illuminated from behind a plastic filter converts the white light into polarized white light.
Transparent transistors produce an electric field that twists the crystals in a fluid so that they polarize the light passing through them to varying degrees.
Light passes through when the polarization matches the already polarized light source. It is reduced or blocked when they don't.
Each dot or Pixel is made of three cells with color filters for the colors Red, Green and Blue with each controlled individually.
For an ordinary 1080p television the image is 1920 dots wide, 1080 dots high with 3 cells for each dot to create color images. That's over 6 million cells!
It's like millions of colored window shades opening and closing on a gigantic apartment building at night to form pictures.
Only the cheap ones :-) Enthusiasts jumped from Plasma to OLED. I just found a 2007 catalogue which has an even bigger variety with both LCD and DLP rear projection TVs. In the same catalogue LCDs are four times the price of the same size CRT !
That's good. I always wanted to know how a T.V. works. One time I asked someone and they gave me a smart ass answer. They said you turn the switch on and start watching it.
Well that shows what I know, I always thought it was done by magic.
😻😹
It's called propaganda, instead of printing pamphlets with said propaganda they had TV personnel paid to read their propaganda to try and convince the citizens it was true..
@@MrYAMAHA32177 exactly!
It was interesting, thank you
Try explaining how TV today works in ten minutes.
WGN-TV (Chicago) was one of the first U.S. TV stations.
The technical drawings and animation look very much like the work of Max Fleischer, who made animated films explaining scientific and technical concepts, and who led the animation department of Jam Handy Studio after being ousted from his own studio. Jam Handy was based in Detroit.
How it works: 1. Pull out knob to turn on, 2. Rotate dial for desired channel, 3. Adjust "rabbit ears" for best reception, 4. Push in knob to turn off set. Got it? If not read 1-4 again.
It's like taking a correspondence school to work on television sets.
One of those Heathkit TVs though Bell and Howell...I will look up the number in my Rolodex and post it.
I was an instructor at RCA home study school back in the 1970’s.
While working at RCA Labs I was fortunate to meet Vladimir Zyworkin , the inventor of the image orthicon.
@@erin19030; He stole the idea from Farnsworth.
Its amazing tesla knew that radio signals would be able to do this eventually.
I actually never knew UHF stood for Ultra High Frequency. Just never needed to know that, but now I do!
Clear as mud.
Oh mighty and timely algorithm give all of your secrets
Interesting, but very simplified.
Totally tubular....
Yep! not a single transistor or IC chip. Pretty amazing, huh?
Amazing how we have come from CRT to OLED in a few short decades
Hmm this was very interesting!
in the 1950s you could be watching an educational documentary and it would just end with "oh by the way, want a lifelong career? yeah just walk into a tv studio, you can do it, it's allowed"
8:36 “add sound through FM radio”... ...so that’s how they did it. Two receivers, one for video and the other audio, it’s a wonder that they synced up. I have a Walkman from the 90s that used to pick up TV signals back during analog broadcast. Could only hear the audio only, obviously. I believe they were forced into digital broadcast in order to free up those frequencies.
Syncing up isn't really a problem, electricity always goes the same speed, no matter if going through a microphone or a camera. The amplifier and transmitter circuits are pretty much identical.
That camera tube would cost around $10,000 dollars in 2021. Nobody said pro grade cameras where cheap.
"It's influence on thinking and actions is tremendous" As the internet has proved, that didn't necessarily mean a good influence.
By 1952, around 35% of usa population already owned a tv receiver
BEFORE I WAS A TEENAGER . ALWAYS PLAYED WITH THE NOBS.
British cameras had a mechanical means of scanning through two counterspinning discs that opened and closed points of light from top left to bottom right just like the electronic scanning does in this example.
That was the Baird system, which was quickly superseded in the UK by the fully electronic Marconi system here.
It could now be called
"Television: How It Used to Work".
I"m sure this short will be targeted by MST3K. At the 7:26 mark I would say "And if you leave the screen up a few seconds, it becomes a game of Breakout"
What about the coat hanger?
As primitive as B & W TV looks and seems to us today, can you imagine what someone from the Middle Ages would think? Black (and white) Magic!! They would burn you at the stake for being witches! ⚡ 💀
This is a myth. Middle Ages people weren't this backward. Some scientific principles were already known from ancient Greek times.
@@peterc.1419 Oh dear Lord, gimme a break. I was not stating a fact, it was purely conjecture as anyone can clearly see. Get over yourself.
Now I know how the TV worked back in the mid fifties and early 60s. Because back then most TV sets were black and white. But really the actual color is fluorescent. Kind of like the fluorescent bulbs you see it most hospitals. Because a lot of our hospitals do use fluorescent lighting in the indoors. As a matter of fact they used to use fluorescent lighting back then as well. So I understand how TV works and now I understand what we got the black and white from it's really when you watch TV you're not really watching black and white you're actually watching fluorescent that acts like black and white.
This just a brief explanation about picture tubes. Doesn't cover all the stages in a tv for example some sets had 20 or more vacuum tubes or stages with a lot of adjustments.
They did not had 3 channels, they had 5!
"A stream of tiny negative particles at the tube." Seems like someone misinterpreted this and started applying it to programs..
🌟
This "Instructional" film is vastly oversimplified, while being "State of the Art" at the time.
Harry: A book? what do you want a book for?
Matilda: to read
Harry: to read? why do you want a book if you got that television sitting in front of you, you can't get through the book faster than you do with a television set
Mike: Get out of my way.
Exelente como sempre, pena nao ter dublagem ou legendas em portugues do Brasil
Sim, Que pena
One decade after: transistors go brrrr
I don't miss low resolution CRT television. The last CRT television I bought had a 27 inch screen and weighed 98 pounds. My 32 inch HD television weighs 26 pounds.
With the CRT I picked up 23 analog channels over the air. I'm now receiving 118 digital channels over the air.
Where do you live to get 118? And even 23 analog channels? I get ~60 digital channels from my outdoor antenna and I’m in a suburb of Lansing Michigan. And most of them have duplicate channels or are repeater stations
@@charlie_nolan It's really not as good as it sounds. I live in San Francisco about three miles from Sutro Tower which has been used for television transmission since 1972. When television switched from analog to digital we were getting 62 channels but it's been increasing ever since. Last year at this time I was getting 93 channels. Now the bad news: At least 1/3 of the channels are in foreign languages. At least 15 of those channels are shop at home stations. 10 of those channels are religious oriented. 8 are repeat channels. So it's actually about 50 channels and of those I probably watch about 8 channels on a regular basis. I hardly ever watch network programming. I'd rather watch UA-cam through my Blu ray player.
@@ldchappell1 Oh, alright. Probably about 25 of mine are unique but I probably only watch 10 or so, same situation.
While both are due to technological advances the number of channels has nothing to do with the display technology. P.s. A friend had a 37" CRT. That weighed a lot more than 98 pounds.
@@MrDuncl My CRT was 27 inches. I would think a 37 inch CRT would probably be 30 to 50 pounds heavier, putting it at about 150 lbs.
Digital television can provide more channels than analog because the channel can be divided. With analog you get channel 7. With digital, the station can divide the signal 7.1, 7.2, 7.3, 7.4 and so on. We had one channel that had 20 sub channels.
so much potential to change the world, yet it now exists as vegie-vision.
Back then (1952) CRT tubes could violently implode
Ha... Aliens introduced us to TV... along with just about all wonderful stuff nowadays...😎
Wow.. it seems like it was more complicated then
A 1950s TV used about 20 vacuum tubes. An LCD TV contains several million transistors, and that is just in the screen.
Why do we need to see the counter?
Here's the issue: Tens of thousands of films similar to this one have been lost forever -- destroyed -- and many others are at risk. Our company preserves these precious bits of history one film at a time. How do we afford to do that? By selling them as stock footage to documentary filmmakers and broadcasters. If we did not have a counter, we could not afford to post films like these online, and no films would be preserved. It's that simple. So we ask you to bear with the watermark and timecodes.
In the past we tried many different systems including placing our timer at the bottom corner of our videos. What happened? Unscrupulous UA-cam users downloaded our vids, blew them up so the timer was not visible, and re-posted them as their own content! We had to use content control to have the videos removed and shut down these channels. It's hard enough work preserving these films and posting them, without having to spend precious time dealing with policing thievery -- and not what we devoted ourselves to do.
Love our channel and want to support what we do? You can help us save and post more orphaned films! Support us on Patreon: www.patreon.com/PeriscopeFilm Even a really tiny contribution can make a difference.
Why does every narrator from the 60s or before sound the same?
the boy at the end was not impressed ( he grew up to be Bill Gates).
how to get this tv?
You build a Time Machine.
Many of these are still hiding in basements, attics, and garages. The problem is finding one with a still usable CRT. They aren't made anymore, and the last re-builder shut down 10 years ago. If the tube is still decent, then it may be worth restoring the set.
I have one in my bedroom! It works fine.
Black Magic. Evey tv show starts with an off camera black mass.
😊
Доставить новое оборудование для грамотных учёных.Спасибо большое.
can not beyound the Horizon...........Earth is flat......
3:00 - This tube costs MORE than a thousand dollars!
Really... that all? Let me introduce you to newest iPhone ...
Let me introduce you to inflation.
Value of $1,000 from 1952 to 2021
$1,000 in 1952 is equivalent in purchasing power to about $10,323.28 today, an increase of $9,323.28 over 69 years. The dollar had an average inflation rate of 3.44% per year between 1952 and today, producing a cumulative price increase of 932.33%.
@@edwardblom2661 Thanks for the economy lesson... and condolences on the loss of your sense of humor.
Lol, Did you know that an Image Orthicon can produce a usable image by candlelight? During the blackout of 1965 NBC was able to go live from New York to present a report on the blackout, but they only had power for the video equipment, no lights. There was a candle in front of the presenter (the flame was blacked out due to it overloading the tube in that part of the image). You could see the presenter even though he was lit with just a candle.
@@VonSchpam - Thanks for indicating that you meant your original post to be funny, because you did an amazing job of obscuring any humor.
@@spinav8r Thanks for your reply! Glad I could help. I hope your surgery to remove the stick from your butt goes well.
Umm yes Kimosabee, white man got many magic. Kowabunga !