TELEVISION: HOW IT WORKS 1952 CORONET INSTRUCTIONAL FILM CATHODE RAY TUBE ORTHICON XD39134z

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This color 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.PeriscopeFilm.com

[@donwhitt9899]

I began my career as a TV repairman in 1953. I worked with TVs that had 9 inch round screens made in about 1949. On the back of the TV were posted red warning labels, " Xray warning! Do not sit closer than 6 feet". When that elecron beam strikes the face of the glass picture tube, it doesn't stop there. High speed particles are knocked out of the glass and shoot out into the living room. Also it had a "high voltage rectifier tube" whick operates just like an Xray tube, emitting xrays out the back. The high voltage to the picture then was only about 9 KV. The higher the voltage, the higher the impact of the beam on the glass, hence more particles released. In the last productions of glass picture tube TVs in the '90s, the high voltage had increased to 30,000 volts. This naturally would increase the atomic particles flying out the front of the TV. At a service meeting once, someone asked a factory service representative, "Is there any danger of radiation coming from the picture tube"? He replied, "No more than sunlight".

[@KarlMarcus8468]

That's exactly what I was thinking when the narrator explained that. I was like....aren't high speed electrons beta decay? Oh well, how else you gonna watch I love Lucy?

[@siphobrisloks8133]

Gosh your an old man probably older than my grandpa

[@danam2584]

Did you ever have to take the 9 inch round screens a part? Wouldn't the laminated glass start to separate?

[@donwhitt9899]

@@danam2584 The 9 inch screen is actually a glass bulb - the picture tube. When they go bad, I just plug another one in.

[@incarnadinelifestyle]

In seriousness, you should write a book or memoir. It's important that experiences like your own be documented and the stories told. So much gets lost in the transfer of time.

[@magnatron7734]

Had to climb on the roof and tweak the antenna while my dad yelled up the chimney how the signal was . Watched the packers for the first Super bowl. Black and white Zenith.

[@timmack2415]

We had one TV in our house. It was an Admiral in a metal box and I was the remote control. My father would call me to change the channel, move the "rabbit ears," adjust the fine tune to get the best picture. Then, as soon as I stepped away, the picture would change and I'd have to fool around with it until the picture was okay without me standing there! We didn't have a color tv until I was in highschool.

[@acgillespie]

Hi Tim , I'm A.C. & I was abused as a child as well. Those were the days

[@Petemonster62]

Tim Mack - Did that TV only have a dial for VHF channels? My grandparents had a set like that & also used rabbit ears!

[@timmack2415]

@@Petemonster62 Yes, it did! VHF only. We grew up poor and that was the only TV we had until I was in highschool in the 80s and we finally got a color TV. I think my father spent more money bringing that old black & white TV in for repair than just buying a new one. It weighed a ton! (Not literally) But I remember having to help get it to the car than into the tv repair place. LoL

[@timmack2415]

@@woodynorris8224 ,😂😂😂

[@elitecol69]

Watching this on a 6 inch led phone screen as I pooh. Amazing!

[@stephenwilliams5201]

Tks worked for Sylvania tv for 30 years all ways welcome to see movies on tv

[@JENDALL714]

I still have my 1981 Zenith Space Command TV, works perfect and in near mint condition. I paired it with a Zenith HDV420 receiver with it, so I can receive the ATSC over the air signal. Funny thing is, the remote that came with the receiver works with the TV also, I guess Zenith never changed their infrared signal for 40 years, I can only power on and off the TV and volume with it, since the channels are now handled by the receiver, but it works.

[@StringerNews1]

Small world! I grew up not far from the mansion where the original Coronet studios were, and remember touring the mansion on a grade school field trip. Of course we saw lots of Coronet films in school. And like many kids in the Chicago area, I watched "Bozo's Circus" on WGN-TV, and once in the studio audience. I was the only kid there who was more interested in the control room, not the clowns. Some years later I was a student at the Armour College of Engineering when a friend helped me get a job at the university's television facility. That led to a 30 year career in television broadcasting! Thanks to Bob Mayhercy and Bill McCarter for making it possible.

[@Petemonster62]

@@BlondieSL - Yeah " Bozo "; the clown with the name that really caught on! Bozo was franchised; almost every metropolitan area had a channel with a local TV personality playing Bozo. Plus, calling someone a " Bozo " became a national slang insult term in the 1970s!

[@kdkatz-ef2us]

No computers required and truly wireless

[@robinj.9329]

I was born in the early 1950's. And I still recall visiting the homes of a few classmates where they refused to get a TV set! As late as 1970 or so, many older folks saw television as "the work of the devil"! And would NOT have one in their Christian Home! (How right they were!)

[@WitchKing-Of-Angmar]

I could imagine, young parents flocking to their television device distracting their minds all day long. Probably looked like possession for our older folks. My grandmother wasn't particularly keen, as she sat in the back putting together a 1941 Lincoln Model. Another day hand carving a 1920 Rolls-Royce model

[@Petemonster62]

@@WitchKing-Of-Angmar - Your Grandma was a trailblazer - constructing models is almost always a " Guy's Hobby ". But she shows that you don't have to devote all your attention to the TV & can work on a hobby while watching!

[@JRNipper]

Everything is a double-edged sword. TV, like anything other medium can be used for good as well as evil. My wife accepted Christ while watching Dr. Charles Stanley on TV, so there!

[@sodality3970]

I can imagine my dad watching this in his 8th grade class back in 1952 .

[@daveroth9168]

Thanks, y'all, for sharing this beautifully-transferred curiosity...cheers...

[@powermadracing5116]

The first three sentences of this is everything

[@danielcruz8347]

She,s beautiful colorful repeat love it..basic Memorable wonder how many children were glued to this production an started carreers because of its production. Thank you for posting

[@andyrob3259]

It amazes my mind: if you sit and think how humans have bent chemicals and minerals and science to do so many common tasks. Despite our problems we are a darn creative species. I mean who thought to out phosphorus on the inside of glass to create an image! And then the rest of the stuff so together we get a moving picture for example.

[@a1wireless1964]

And almost all of it before the invention of computers so, how did we ever survive LOL

[@OneofInfinity.]

fascinating, one day they might air in color, the modern times we live in.

[@redflame300]

lol

[@JENDALL714]

They already had color by the time this was aired. NBC and CBS both had competing systems, the FCC ultimately chose NBC's system to be the standard because it was compatible with the already existing Black and White sets. CBS's system was far superior and was the high def of it's day, but was not compatible with the Black and White Sets, people could not watch CBS's system on a Black and White Set and would have to buy a new set to watch television. If the FCC had chosen CBS's system, the networks would have been forced to shoot everything in color, but since they chose NBC's system and was compatible with Black and White sets, people took their time to buy a color set and the networks also took their time shooting in color, since no one was in a hurry to buy a color set.

[@Chris_at_Home]

I had an apprentice license in Connecticut for TV repair in 1969 at the age of 16. I was a geek. The shop I worked at had the franchise for the Motorola Quasar with the works in a drawer. The technology sure has changed. I kept up in communications

[@JENDALL714]

@@Chris_at_Home I got into TV repair late in the CRT game in the late 90's. I did train on LCD, DLP and Plasma, but the handwriting was already on the wall, when the manufacturers stopped sending us parts and instructed us to just exchange out the television instead of repairing it. Rather quickly all your TV shops disappeared along with it the repairmen. I got into Copy Machine repair, and sadly that is disappearing as well.

[@Chris_at_Home]

@@JENDALL714 I went into the Navy after high school and was an avionics tech. I did a few other things after the Navy and then moved here. I did electronics on well logging equipment that measures different things in an oil well using acoustics, resistance and different radioactive sources and tools. Did that for 8 years then went into communications doing pretty much everything from slow speed circuits to fiber optic, digital microwave and satellite. Also did some two way radio work domestically and overseas. The same with networking. Most of these jobs were away from home working shifts of a few weeks on and a few weeks off.

[@luisreyes1963]

"Greetings, over your orthicon tube..." - Ernie Kovacs. 📺

[@MrEjidorie]

Television was one of the greatest inventions in 20th century, and made an impact upon our lifestyle. Thanks to robust economy, TV sets spread among American household at first, and then disseminated in other countries. But TVs are now replaced by PCs and smartphones as major medium, and not so many young people watch TVs in Japan these days.

[@fromthesidelines]

Color prints of this one were also available to schools. The control room and studio sequences were filmed at WGN-TV in Chicago {note the camera at 1:21]. However, Channel 9 wasn't telecasting *any* color programs at the time.

[@vintageracer]

In the early 1960s, the station in which I started my career, WMAL, would take the IO tube that was "ghosting" (retains an earlier image) and place it in a freezer. After a substantial period of time (don't remember how much) it was good for an additional period of time in the camera.

[@ai4ijoel]

The receiving antenna was pointed away from the station, 4:30 into this video.

[@Petemonster62]

Joel Wilson - I caught that too. The antenna would probably work good receiving from the opposite end, but that reflector element would improve the antenna's gain if it was properly oriented!

[@albertpatterson3675]

1953 we got our first television set, had one channel to watch, and the programs consisted mainly of 1930's westerns that were hardly audible and the picture quality was horrible. Then came 1955, the Mickey Mouse Club, and I fell in love with Annette.

[@JENDALL714]

My father raised our antenna an extra 5 feet, so we always got extra channels from the next city.

[@chuckadams4400]

Annette Funacello had a great rack and a cute face. Don't tell me Disney didn't know how good Annette looked in that Mousketeer sweater.

[@JENDALL714]

@@chuckadams4400 I think she had a breast reduction later on, in her last movie in the 80's, she had almost no rack.

[@hawktriad]

We were lucky that we had 4 channels and three remote controls for my parents' convenience...child closest to the TV changed the channel. Those were the days when you could tell time by what was on the TV regardless of which channel. Television-induced insomnia was not a huge issue before like 1982 because the National Anthem played just as all the bars were closing in most places.

[@fromthesidelines]

She was the last one to be chosen before production of 'THE MICKEY MOUSE CLUB" began- and Disney himself chose her.

[@marmaly]

TV was practically a miracle. So much life-altering technology in so few years

[@asteverino8569]

Online is still generated images. I try to remember that. Nice instructional film.

[@greenidguy9292]

I already saw this on TV…

[@Aidenaman]

Thank you!!! I can't wait to use my new television!!!

[@dennismartin4659]

Much of our future depends on the way we use this medium of communication. For its influence on thinking and action is tremendous. As we have sadly learned from the danger of social media in America.

[@MrOrthopedia]

There were colour television sets in the early 1950s. The problem is like the OLED models of today, colour equipment was really expensive.

[@darrenmcdowell5458]

Wow, I always wanted to understand how t.v. works. Thanks alot.

[@briang.7206]

No mention of all the circuits found inside a tv set. Early models had some 20+ vacuum tubes. I worked on some tube sets as a teenager.

[@dougbrowning82]

This is a simplification. The CRT is the heart of the action, everything else just supports it's operation. RF/IF amplifiers, video detectors, video amps, sync amps, horizontal/vertical oscillators, horizontal/vertical output. Plus audio if, detector, amp, and output. And a power supply to keep it all juiced up.

[@River1955]

Prophetic.

[@jonnydanger7181]

Tell-a-Vision has warped the human brain.

[@JRNipper]

As well as radio, print, theater, booze, drugs, etc...

[@WitchKing-Of-Angmar]

Not as badly as the drool over touch screen we base literally anything in life around. Architecture, Automobile making, personalities, color choices. Really good luck finding a pleasent looking car today both in design, color, performance, and smoother riding capability. Also hardly economy automobiles and much smaller than a 1950's sedan that could hit 120 in 15 seconds.

[@a1wireless1964]

Oh my gosh at 2:40 Mark I finally realize this film was made probably by WGN-TV Channel 9 here in Chicago

[@davidgeorge1294]

Ok everyone got it? There's going to be a test at the end.

[@GoSlash27]

MORE than a thousand dollars ?!? Land o' Goshen!

[@Petemonster62]

Go Slash 27 - That made it very expensive for a TV station to buy color TV cameras because each color camera used 3 image orthicon tubes. The orthicon tube was cutting edge technology in 1952 & produced a better picture than its predecessor; the Iconoscope.

[@EFIL4NAISREP]

Back in those days educational films talked SUPER SLOWLY

[@Johnny_Tambourine]

In the beginning, before the internet & digital, all we had was 'cable channel P-10'. While everyone else was adjusting their rabbit ears the cool kids were watching P-10.

[@larrypatterson5363]

Growing up in 1960’s suburbia I never saw rabbit ears until college. Antennas littered the rooftops until the cable companies came to town in the 80’s, and paid installers $10 a pop to convince customers to get rid of them. Fortunately, my dad wouldn’t let them take it down. Every time the cable went out, we always had an antenna as a backup!!! Ah, analog was great!

[@justdeeznuts]

Or tocom cable with a burnt chip to watch porn at night. Oh and HBO

[@raylopez99]

The hardest part to understand was how the electron beam is modulated by the light image on the reflective surface, and the modulated electron beam containing the light image is transmitted away with a carrier. Who discovered an electron beam behaves differently when reflecting off a dark image rather reflecting off a light image? That's impressive. (internet): "When the camera scans a bright image, the transmitted signal has a higher voltage than when scanning a dark image."

[@GigsVT]

The special plate they talk about was a material that would gain a positive charge based on light exposure. The electrons would either be absorbed by the plate if it was positive enough (meaning that area of the image was bright), or reflected if the spot wasn't charged positive enough. If a lot of electrons came back that meant that spot was dark. The charge storage plate itself was a sort of chemically created mosaic, almost like photographic film had tiny grains of silver. This allowed it to have a 2 dimensional variation in charge across its surface.

[@raylopez99]

@@GigsVT Thanks, that makes more sense than measuring backscatter on the electron beam, as implied in the cartoon schematic.

[@GigsVT]

@@raylopez99 well it is still the backscatter, they just don't really go into why it backscatters, depending on the charge of the spot it's hitting that works on some variation of a photoelectric effect.

[@raylopez99]

@@GigsVT You sure about that? Is the change in voltage from an image that falls on a plate or the backscatter from an electron beam scanning an image on a plate? Knowing what I know about electronics, I would bet it's the former. Kind of like how modern CCD cameras work (charge coupled devices).

[@GigsVT]

@@raylopez99 it is the backscatter. Imagine one spot. It's not really a pixel but if you want to use that analogy it's not terrible. The charge plate has a positive charge in that spot which is given to it in some form by the light falling on it. When the electron beam hits that spot, electrons will be absorbed as long as it still has a positive charge. It's basically a capacitor being discharged by shooting the electron beam at it. But once it's no longer positive, the elections start bouncing off of it. That reflection is what is measured. A highly charged spot will reflect few electrons, indicating that it is a bright area.

[@ronaldbiggerstaff2143]

Then came Gunsmoke! Howdy Mr Dillon.

[@larrypatterson5363]

The original “CRT Theory”!!!

[@rowanmoormann9532]

Right on Guys,

[@Isawwhatyoudid]

I repaired TVs for years. I got in right before the CRTs went out of style. That pretty much killed the shops of all the old guys.

[@manhoot]

This certainly was illuminating

[@Madness832]

"...a tube that costs more than $1000..." I'd hate to be "that guy" if he were butterfingers!

[@MrWildbill]

If adjusted for inflation it probably is close to a grand in 2021 money back the day a black and white picture tube cost the TV maker about 20 bucks and the entire TV set was in the 100 - 200 buck range back then.

[@JugSouthgate]

$1000 in 1952 is about $10,000 today. Imagine what the complete camera cost...

[@JENDALL714]

@@JugSouthgate Plasma TV's in the early 2000's were about $10,000 and they weren't designed to last more than 10 years. I went to Panasonic Plasma repair training. They had a better picture than LCD and but not as durable at triple the cost, they never did catch on though.

[@WitchKing-Of-Angmar]

@@JugSouthgate that isn't how Inflation works, clearly you don't understand currency since the 20th century. In 1950, what says $5 for a paladine overjacket is not $50, more so it is $36. Just like If a 1920's films is sped up, the people will be fast and the automobile will be faster, but if slowed down to correct framing, the people would be naturally moving and the automobile would still be going fast. Because 2 miles per hour compared to 30 makes for a different showcases. That applies to anything in 1950, a house that is registered $8000, will not be $800,000 in 2021, noticing how from the paladine overjacket, it went from 5 to 50 in unnatural inflation rate, while the home exceeding from 8000 to 800,000 instead of 80,000 because the absolute value would rather be more than I'd say $80,000 today. Now, knowing that, the proper value price for a home that says $8000 in yes.. still 1950, would tally up to being 100,000. These being well modern, large, lengthy homes, fabricated and cared for lawns, beautiful neighborhood areas from the rich dense autumn forested plane, to a mountain top in Yonkers, all constituting a mature rational price no matter the idea. I wish people would stop with their ignorant "oh it wasn't that great because a 20 dollar radio was actually 200 dollars blah blah blah". Completely untrue and clearly an algorithm of a child's mind playing wandering around into topics they don't know, pretending they've known for years. It's almost as hard to explain to you all as color cars in the 1930's.

[@rodcorkum8482]

@@WitchKing-Of-Angmar Huh???

[@MillerMeteor74]

It's funny. At the end of every one of these videos from Periscope it says "HD, 2K and 4K footage", yet all of the videos I have seen are 480p.

[@GigsVT]

you pay them to license higher

[@GigsVT]

@@BlondieSL 35mm film is already more than 4k in quality, 16mm at least 2k

[@Sarairose]

It all The devils tube!

[@JRNipper]

No...my wife was saved watching a Dr. Stanley church broadcast one day. Mediums are neither good nor bad, just like a blank sheet of paper. It's what it's used for that makes it good or evil.

[@Sarairose]

@@JRNipper either way you slice it, it is a form of sorcery. There is no in between, you either do or don’t, there are two choices it’s up to the person.

[@johntyjp]

When I worked in TV, we were warned not to stand too long behind a TV monitor ! Electron beams escaping I wonder!?🤔

[@JRNipper]

Most likely X-rays from the high voltage rectifier tube, those were usually located right at the very back of the chassis.

[@dougbrowning82]

@@JRNipper And usually contained inside a metal box. You're safe unless you operate the set with that box open.

[@nealfry2230]

~" Brought to 'you" ~ by~, " { Fry Radio & TV in Detroit, Michigan USA }

[@rogerbartlet5720]

Imagine people in 1952 seeing the future 2021 TV shows with Ru-Paul or Honey Boo-Boo? There would be no television.

[@wtxrailfan]

Oh, they knew what was going to happen. Why do you think TV immediately got the nicknames "idiot box" and "boob tube?"

[@MrEtherguy]

And now 70 years later it is largely obsolete for the two younger generations. I only use mine when my parents are in town to visit, wiping the the dust off the LCD screen each time. Although I do love the series developed for it in the 60s to 90s.

[@rexjolles]

I got a couple old tvs

[@MrEtherguy]

@@rexjolles I had an old CRT television in a wood frame made by RCA that I had to get rid of about 9 years ago because the comb filter went out. I kept it because I grew up watching broadcast TV on it back in the late 80s and early 90s as a kid. The remote was almost the size of a VHS tape and used a 9 volt battery. It had two 6x9 inch speakers at the bottom and had great sound compared to the plastic framed televisions at the time. The analog tuner didn't provide stereo, but if you hooked up a VCR you could move a switch on the TV's control panel to take advantage of the source's stereo recording.

[@wtxrailfan]

Yeah, because watching videos on a tiny smartphone is so much more advanced than watching them on a 70" TV screen.

[@WitchKing-Of-Angmar]

Because the ones at this time felt bright, rich, and inviting. It turns on with an elegant lense opening for the grand reveal of a warm radiant screen. Elegant rapping and embellishments around it, I was ecstatic going to hotels with rich pale yellow and iridescent green TV sets with golden lamps on either side, warm vibrant blue-red-yellow-beige-dark green-maroon-patterns of silver and blue, red and green, pink and red. All the fabrications of pure beauty. Golly! Nothing like that time, any thing else after this already entire decades worse.

[@lrg3834]

...And it was the British, specifically a Scottish engineer (John Logie Baird), who built and demonstrated the world's first mechanical television. (I'm neither British or American, btw. No pride here.)

[@andyrob3259]

And it was the Naz** that had one of the first TV channels broadcasting the 1936 Berlin Olympics to very rich people’s homes or public TV ‘lounges’. The TV station closed at the beginning of the war. There Is actually a good documentary on KZbin from the History channel about it.

[@dragosmoldovan990]

I dare Alec from Technology Connections to explain this better

[@jackclement5707]

My god ~ What if the Reds find out about this? 😨

[@dannyjones3840]

And 70 years later, I'm watching this on my led TV screen, mirrored of my smart phone.

[@timothygrace2627]

It’s nearly impossible to find a vacuum tube tester anyplace. Not even Rexall or EJ Korvette’s have them. 😞

[@jackamelar1455]

5 Channels! We only got 3.

[@kenmore01]

But...where do the pictures go when they're done?

[@Inflec]

Radiating off the planet to space.

[@kenmore01]

@@Inflec I was joking, but great answer!

[@Mhel2023]

Lol when i was little i always wondered where the buildings and people went when the tv was turned off. I used to think they lived in the tv waiting for us to turn it back on

[@alexisg311]

A pesar de los años, es un vídeo didáctico, fácil de comprender.

[@davidrule1335]

Help! I'm hearing the cathode ray tube is better for NES Nintendo games because of the reaction timing? Kinda like Sgt. Peppers was recorded to be played back in mono.

[@JRNipper]

True! That's because analog circuits are fast as lightning due to having no latency which is and always will be present in digital codecs. Digital is very slow compared to analog.

[@davidrule1335]

@@JRNipper Thankyou I've been playing Mike Tysons Punch Out On the Wii with a modern tv, and noticed something wasn't right.

[@Tomfooleryish]

Does anyone know the name of the juggler?

[@andrewstamford1988]

So in essence the TV CRT is 'zapping' every single pixel with the electron gun, one at a time from one side to another, adjusting the beam down a row when it gets to the end, to start the whole procedure over again one pixel at a time from one end to the other and so on and so forth until it does the whole screen. Then to do the next frame exactly the same way... of course incredibly quickly, but basically one pixel at a time. Is that right?

[@Inflec]

You nailed it.

[@JRNipper]

There were no pixels, per se in B&W analog TV. The video had an infinite voltage variation from dark to light (7.5 IRE to 100 IRE). When color CRT's came out, they had red, green and blue color dots, but the video signal was still analog and so was the color signal which was at 3.579545 MHz, right where all detail was in the video. It was a trade-off, you can have color and less detail, or nice detail in black and white.

[@andrewstamford1988]

@@Inflec OK, now I'm no spring chicken, been around a bit, but until yesterday I never really understood how CRTs worked. It always sat in the back of my mind as to how an image was created, but finally, knowing the process - well, it blows my mind. You would think a TV is a basic thing, but damn this is just amazing. I love learning about things like this and love still being amazed by it all (and knowing I understand it).

[@JRNipper]

@@andrewstamford1988 In the late 70's when I learned to service televisions at NEI in Minneapolis one of our instructors said every kind of circuit known to man was in color TV sets, and he was right. Analog, digital, RF, IF, AF, AGC, AFC, AM, FM, Sideband, low voltage, high voltage power supplies, oscillators, integrated and differentiated pulses, etc...

[@Inflec]

@@JRNipper - My instructor said exactly the same thing. He said that the idea of learning by working on televisions (since they were the most readily available electronic instrument) was not to make us TV repairmen, but to expose us to all the different circuits that are found in electronics. He certainly was on point.

[@jaffarsamuel7919]

So who's gonna save TV in this gen?

[@angelahackney6588]

If screen not come on when cold heat with blow dryer lol or smack side of cabinet which might blow fuse which where replacement

[@angelahackney6588]

We had ladder wire lol maybe 3 channels

[@wendellcoleman1137]

But wouldn't they already have a TV, and therefore already knows how it works/turns on, to be able to watch the "Here's how a TV works video?

[@davidkerl1431]

Analog tv sets had a "brightness" control on them. I turned mine up all the way but the programming never got any smarter.

[@JRNipper]

You must have had a broken TV, mine worked great!

[@larryrobinson6914]

I'm old enuf to remember a screen size of a shoebox and four channels two of which were off at sunset. Glad for improvements in techno but the shows back then we're better!!!!!

[@rcjeffrey]

Philo T. Farnsworth, the inventor of the first t.v., was my Wife’s Great-Uncle.

[@edjohnson1205]

I used to work at 900 Front Street in San Francisco (at the ABC Broadcast Center), which is just around the corner from Farnsworth's laboratory on Green Street where he demonstrated the first complete working system of an all electric television system.

[@1XX1]

HORROR.... MY EX-WIFE WITHOUT A CELLPHONE. Our sixteen kids without a ....

[@ardentartisticstonemasonry4756]

♥️ACE RADIO AND TV♥️MOMMOM&POPOPOP DILODOVICO

[@hartman65]

Хорошие времена были

[@wcharliewilson7004]

...hiding under the table from you guys! 😉😁

[@hartman65]

@@wcharliewilson7004 lol👍😅😜 Помню в детстве у бабушки был черно-белый телевизор, 2 канала. Крутили кино, мультфильмы и новости и программу как прятаться во время ядерного взрыва, все велись на это.

[@jackmag4056]

Love the awkward pause after every sentence😂

[@WitchKing-Of-Angmar]

Yes, no one talks as intelligent as you, never breathing in-between your words. This is the build of suspense, intelligence, understanding frame, a guide for the audience watching. Perhaps you'd like them to turn the wind up rotary mechanism and let the words spill out.

[@jackmag4056]

@@WitchKing-Of-Angmar Gee wow! It was just an innocent comment , I didn’t want ruffle anyones feathers , sorry you took it the wrong way

[@WitchKing-Of-Angmar]

@@jackmag4056 you pulled mine out rather than just ruffled them. Speaking of feathers, I hear a cooing outside but I'm not certain if it is a Dove or an owl.

[@jackmag4056]

@@WitchKing-Of-Angmar Now you completely lost me , I haven’t a clue what your on about 😵‍💫

[@WitchKing-Of-Angmar]

@@jackmag4056 no need to be so dramatic.

[@elliotjoseph6093]

I can remember when my mom payed 400 hundred dollars for a VCR.

[@russellzauner]

I need me an orthicon tube and I have a thousand dollars where to get

[@dougbrowning82]

Landfill. Staticons replaced them, which were better, smaller, and cost less. The last tube pickups were Nuvicons in the 80s. They were replaced by CCD chips, which are dirt cheap. Sony once had a single tube color pickup called a Trinicon (used in their Betacam ENG camcorders, among other cameras of the day), a play on words of the Trinitron single gun color picture tube. The first camera tube was called the iconoscope.

[@JRNipper]

@@dougbrowning82 Orthicons were replaced by plumbicons, and the Sony BVP-150 ENG cameras that I maintained for WTVC, had saticons. Saticons were inferior to plumbicons in that when you turned up the gain, the dreaded "butterfly" ghost would appear, other than that, they were OK. You get what you pay for. Plumbicons were the most expensive, about $12,000 for a set of 3 (one for each color channel). The G.E. telecine we had at WTCI was absolutely horrible. It used, my hand to God, vidicons! About every 6 to 9 months we had to replace them and the color they made was nothing less than disgusting. Color blotches everywhere no matter where you set the shading controls. Convergence was fine, but that's about all the praise it deserves. Newvicons were strictly a consumer color camera tube. I had one back in the early 80's, it wasn't bad, but definitely nowhere close to broadcast quality.

[@lauracomp100]

1:17

[@proofnewtestamentistrue2948]

!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

[@lucylouise4922]

I don't think it'll catch on.

[@lucylouise4922]

@@BlondieSL It's people with crazy thoughts like that, that get locked away

[@timmitzlaff8960]

Sorry, I don’t get it

[@anthonycarlisle6184]

Even now I'd like to see how "the gun" works in real time. That's allot of extremely quick mechanical movements & could be on for hours...wondering if that's just how they thought best to describe it mundanely, then. 🤔

[@MrWildbill]

There is nothing mechanical in a TV picture tube, the electron beam swings from electromagnetic forces pushing it from one side to the other. There is not real "firearm style gun", one end of the tube as the cathode (an electric plate) that emits the electrons, its called a gun because it shoots out electrons not bullets.

[@MrEtherguy]

I think it's just a description, there aren't any moving parts in a cathode ray tube or electron "gun." Everything is electromagnetic.

[@vashon100]

"allot" ? a lot

[@peterk8138]

@@vashon100 a lot

[@jayb8745]

Wow! Maybe some day in the future, they’ll have 100’s of channels but, really nothing really worth watching!

[@ikemyzon]

90% of internet is ground based.

[@AFRoSHEENT3ARCMICHAEL69]

Man words like, mediums, channeling, programs, control room, sounds like witchcraft. Oh wait, it is...

[@cootmaster]

more than 1000.00 lol

[@MrYAMAHA32177]

TELEVISION: HOW IT WORKS, the best propaganda tool in modern history@!

[@rexjolles]

It's not propaganda it's literally how TV's worked

[@texaswunderkind]

Interestingly, the Fairness Doctrine (1949-1987) required licensees to broadcast controversial topics in the public interest in an honest and balanced manner. Both viewpoints were to be presented. It is one reason why old news broadcasts were devoid of the hysterical, empty rhetoric of today's tabloid news. With cable television no longer limiting households to only a few stations, it was abandoned in 1987. The result is the heavily tainted garbage news you see today, where facts are inconsequential, and the only thing that matters is who can shout the loudest.

[@craigpalmer5693]

Back in 50s and 60s black and white 40 years ago technology flat screen tv more advanced in 70s wasn't cable or get more channels sports movies game shows action movie sci Fi movies scary movies comedy movies drama movies christian shows no more box tv those there good old days now remote control finger tips news plus entertainment system blue ray disc much clear than video cassette don't see them anymore DVR recordings going to movies big screen surround sound effects studium seats cup holders need more information about 21st century 20th century just pass on

[@christrudell7966]

Idiot box 😂👍

[@tomryan914]

"Chewing gum for the eyes!", unknown.

[@mikepoteet1443]

Too complicated for me I'm out.

[@DEADIKATED]

TELL LIE VISION