I was expecting a video by prominent modern educators on KZread like Veritasium, Smarter Every Day or Khan Academy but it turns out that the best explanation I've ever seen on the topic is by a video made decades before I was even born

@PureSurgePro

8 жыл бұрын

Lol it's ok, I guess the the past is better. Also I was expecting a nice video from them too lol

@RexGalilae

8 жыл бұрын

***** Making videos with great analogy and animation was pretty hard back then and still is now, but it's relatively easier to make. Notice that this video was made by the US military. I'm guessing only they could convince animators back then to make such videos. =P

@Tuppoo94

7 жыл бұрын

It's in the military's interest to explain everything clearly so that everyone will understand.

@hellinterface6721

5 жыл бұрын

This goes for most things. The old sayings usually still ring true as well. They just don't make em like they used to.

@RexGalilae

3 жыл бұрын

@@Tuppoo94 It's also in every educators "best interest" to make sure people understand what they're saying lol

These old training videos often surpass our modern multimedia productions. This is an example of the high quality instruction products of the past. Easy to follow, clear and well illustrated. Good stuff!

@HAWXLEADER

2 жыл бұрын

Modern audience would have a really hard time sitting through this because it is too long and explains EVERY little thing. It is good and bad at the same time. A modern multimedia educational content would have summed it up in less than 5 minutes, however it wouldn't be as magical.

@GamePois0n

Жыл бұрын

@@HAWXLEADER are u saying the newer generation is less intelligent?

@draco147

Жыл бұрын

@@GamePois0n Not less intelligent but less patient, we want everything to be fast and easy to digest. That's why we have TikTok-like video feeds being so popular.

This is the best explanation of AM and FM that I've yet seen.

@jskwk2424

7 жыл бұрын

I didnt even know about AM before, we dont have any AM radio stations in Finland and its not used for anything. All radio is FM.

@Tuppoo94

7 жыл бұрын

Suomi mainittu, torilla tavataan!

@malaykumar6899

7 жыл бұрын

we have still many working AM radio station in India !

@justforagerestriction6675

6 жыл бұрын

Tuppoo94 exactly!!!! Never seen a video with crystal clear explanation like this one. Other videos just explain conventionally like u know withe mathematical terms and stuff. But this is next level explanation. ...

@FahadAli-mf3xb

3 жыл бұрын

100% agree

I am an instructor at a US Army school and we love using this video. It still works for the basic understanding level and the students get a kick out of a space race age video.

@lawrencegoodwin6687

4 жыл бұрын

Joshua Rambo What is kinda cool too is that without intending to do so, it explains single side band.

Nostalgia and education rolled into one. Loved it! Currently studying for my Ham Radio exams so this is a gem. Thank you.

I am compelled to say how wonderfully clear this video is on AM and FM modulation. I saw a few modern explanation videos before watching this. Those other ones were impossibly wordy and lacked in clarity. Thank you !

The old black and white tapes amazingly describe it all.

these old videos are awesome. such amazing and simple explanations in both the visual and audio. great stuff.

Love the old explanations. They explain it in a way I can understand.

@konglives4453

3 жыл бұрын

Same here.

This is a very good (and still relevant) film! I "always" knew how AM worked, And had an idea about how FM worker, But this EXPLAINS it. Decades later, FM is still ingenious! Armstrong was a genius! First, he gave us Superheterodyne, and later FM.

This is the way of teaching that we expect in college but unfortunately we don't have it in college.

Old videos like these always explain so much better visually.

Wow, what an excellent and thorough explanation! One can visualize the concepts so clearly! Thank you very much for sharing!

Thank you so much!! Now I finally understand what my teacher is talking about....

These old videos are the best!

I’m currently in Air Force tech school learning how to repair radios and radars like these. This video made everything I was leaning in class click

@totallyfrozen

Жыл бұрын

This video was probably shown at your tech school during Vietnam.

Best explanation ever... I hope part 2 and other videos are available which discusses about FM circuits.

Thank you! This is the best explanation of AM and FM that I've ever seen!

Jeez, this is the best explanation I've ever heard!

Great respect for this video teaching quality and the animation with the means of that time!! Feeling grateful!

Incredibly good explanations! Still as valid, today, as the day the video was made.

A very very useful basic lesson. Thanks for making it available.

They made hard things understandable back then and called it teaching. They knew that entertainment doesn't instruct. Good instruction entertains.

IN THE PAST PEOPLE WERE SMARTER, WEREN´T THEY? no tik-tok explanation... this is an almost astronaut´s explanation. The best I´ve seen!

0:50 There is a mistake, the oscillator and the mic both feed the modulator and then the modulated signal goes into the radio amp.

@shashwatsharma6236

6 жыл бұрын

TheDaniel366Cobra yes u r right bro. The carrier wave is modulated with respect to message signal in the modulator and then fed to the amp.

If you know FL Studio, you can recreate the same thing in Sytrus, it is pretty interesting to hear! You can individually listen to the "coded" (modulated) and the original signal. Use a Wave Candy to visualize the whole thing.

Amazing I saw this at south eastern signal school 1971 .

Wow great video. The others baffled me with maths but this one i get. It took the United States Army to make me understand.

@043mehdi

6 жыл бұрын

LOL this guys can teach flight mechanics to a toddler

@justforagerestriction6675

6 жыл бұрын

Kazi Mehdi ikr!!!!!

@malebitsatimbuktu3352

6 жыл бұрын

You are not alone. This is what we call education for discovery.

@Thinker-Humankind

4 жыл бұрын

Now i understand how USA got won WWII,they know what they do

Thank you for sharing this. The visitors to my forums will find this quite helpful.

This is the best video about AM and FM yet. (Even though it's age is over 50 years)

I want this guy to teach me everything about every machine. Today people are too worried about their personalities and asking you to subscribe in between

I've listened to a lot of Radiolab in my time and I have no idea who's name this beautiful voice belongs to.

Really excellent explanation...which I really need right now. Thanks for the posting. I'll hit it a few more times over the next few days until its all sunk in.

I agree with all of the previous positive comments. I always view these "antique" videos first when I want a clear explanation. Thank you U.S. Army.

Modern FM is a good deal more complicated than described here. The carrier is also modulated with subcarriers to carry stereo, SCA and RDS data. Many stations also transmit digital carriers for "HD"-channels although they are separate from the FM carrier.

This is one of the best explanation ever.

Most informative video on the subject by far

Cheers to US Army and the Uploader!

I find non-digital technology way more fascinating than digital

@leolen8029

2 жыл бұрын

Agreed

would you like AMMM or FMMMMMM

@phs125

3 жыл бұрын

I feel like I got the reference, but I don't remember where I heard it...

@calisquid7847

3 жыл бұрын

@@phs125 mr mosely

Reminds me of that “If woody would have went straight to the police, this would never have happened” guy.

Explained well in simplest way ever

Thank you so much for sharing the very comprehensive video.

Superb Presentation...for understanding AM & FM..

They need to make a video like this for machine learning.

Nice presentation.....very easy to understand...thank you Dana for uploading .

Thank You! This is a very good explanation I sent along to my buddy!

just PERFECT ! many thanks for sharing !

Well explained, Good!

I swear all the WWII to post war videos were narrated by this same guy. The funny thing is they all have good info

now that's what it is call a well done job.... putting a video together!!!!! ;-)

The explanation is very good.

Wow! Very interesting video. Well done and thanks for sharing.

Cool thing to do, Take the audio, put it in audacity, use the noise reduction by sampling the noise and then apply the reduction to the rest voila! It actually sounds good! Modern tech is awesome!

Wow… thank you for this video. I understand things much better now. Peace peace peace

Beautiful

I love these old defence force videos

Awesome video and very clear explanation

This is a very good film.

I did a one year long crash course in electronics for computers in 1979 (I was 6 months old when I took the course) at Career Learning Center in Toronto and this video brought all of that information rushing back. This great video, without intending to do so, explained single side band modulation too.

@namename8986

2 жыл бұрын

you took the course as a 6 month old baby?

@lawrencegoodwin6687

2 жыл бұрын

Yup. I was an advanced child.

@dr.sleaseball441

2 жыл бұрын

@@namename8986 i was already divorced when i was 6 months old. She took my 2 year old son too because the court said "i was too immature".

Holy shit ! The best explanation (on Internet so far) ever !!!

Correct me ASAP if I am wrong: the electric signals are travelled into the transmitter where they are converted into radio waves. The conversion is done because of a process known as modulation whereby the amplitude of the wave is modified. Those waves are then known as carrier waves just because now they have modified amplitude. Those carrier waves travel through the antenna and later on reach the radio's antennas. Right? If I am right then when are the radio "waves" actually made because isnt modulation when an existing wave is modified? So it's pretty obvious that the waves were made before modulation but how exactly? Plz help I have an assignment to submit. Thanks

You don't need fancy graphics and high quality cameras and beautiful/handsome faces to tell you about scientific concepts. These work better.

i just finished building an AM radio from scratch. It was such a pain in the ass to built one

@Joel-oe7ud

4 жыл бұрын

Wow!

The voice of this narrator is legit =)

Is that Bing Crosby narrating this video? While I like the Voiceover guy that goes the voices for all those talk sports stations, I think this voice would be awesome for a serious news station like WINS or WCBS. By the way, the guy who does all those voice overs, has air checks of him doing top 40 radio in the mid-80s in Boston. I think it was WKKS?

Is 7:30 not incorrect? They mix up amplitude modulation with frequency modulation. Changing amplitude does not change the end signal in FM (they even filter amplitude variations later in the receiver).

@AlexanderKrivacsSchrder

9 жыл бұрын

No, it is correct. I think you might be misunderstanding the graphic. What it is illustrating is that higher amplitude of the input signal leads to a larger deviation from the rest frequency in the output signal. Its amplitude, however, is irrelevant, as you say.

thank you for this amazing video

They sure knew how to explain stuff back then!

THANK YOU SOOOOO MUCHHHHHHHH THIS HELPED ME ALOT YOU SAVED MY LIFEEEE

Very nice

excellent explaination

very, very good explanation

Awesome! Very informative!

I wonder if Dolby noise reduction was based off the limiter. - Seems similar.

@abishekraju8787

5 жыл бұрын

not really (at least I don't think so). Limiter when used drastically introduces its own artifacts like distortion which in effect is similar to hash itself. Now that won't be a problem in FM receivers since it only decodes data from the frequency information and the limiter only gets rid of the peaks. Even then the limiter is used only with certain preset settings so as to minimize risk of distortion since it's capable of adding additional harmonics meaning introducing frequency content, which is dangerous in FM. Here its only used to clip off the peaks and keep the signal uniform cuz what matters is frequency not amplitude.

I have my spiral bound copy of "An Inquiry Into Things Enigmatic". Nice to see you are still educating the unwashed masses. {former grunt for moses}. For those of you who think tech is for nerds, I can assure you that Dana's wife is the most beautiful woman I have ever seen. There I said it. We all worked in the same place in the 90s...

very very useful...Thanks a lot !!!

Woah! Nostalgic...

Description says this video is 'highly edited'. Is there an un-edited version?

errmm - modulation index (Fi0 deviaton / highest audio freq) and Bessel functions ? hmmmm a bit oversimplified me thinks in terms of bandwidth needed to transmit high definition sound ? ( as opposed to Narrow band FM which approximates to AM in terms of side band content ?

@18theng

8 жыл бұрын

+Eric Churchyard This is supposed to be a very simplistic BASIC fundamentals video. There are others that deal with those as well. Back then, FM radio was damn near space age tech, or might as well have been to the average person.

@lawrencegoodwin6687

4 жыл бұрын

You missed the point of the video. If you already knew the workings of AM, FM, and side band then of course it was simplistic. For me, I now have a foundation of all three that I didn’t 24 hours ago.

Sir add all the videos, y u stopped ur channel, so urs finest video I ve ever seen

@aleksanderkucyk2166

4 жыл бұрын

ET3 IS A KURWIONE GUWNO

Would you like AM or FM?

@PureSurgePro

8 жыл бұрын

I like AM, though I don't know why I like AM more.

I can imagine a classroom full of soldiers in 1940 falling asleep to this. This guys voice could use some modulation.

@abhishekbanerjee9425

7 жыл бұрын

Travis Butler hahaha ... truly notes out

@lawrencegoodwin6687

4 жыл бұрын

I suppose the guys (in 1964 by the way) who were not interested in electronics may have been uninterested...but I’ll bet a bunch of people learned a lot because they watched this little film.

Best video

thank you very much for this video

MUITO LEGAL

6:23 Are you absolutely sure this was from 1964? Cause that information would put it pre-1948 when the FM broadcasting band was moved from 43 MHz to where it is today. Of course this is irrelevant as to how the technology works, but still.

@danalee1000

9 жыл бұрын

This is an Army training film, and I believe they used this frequency for military FM radio communications after the FM broadcasting band moved. So, this is about FM radio theory, not the FM radio band that we commonly think of. Hope that clarifies!

@quill2992

9 жыл бұрын

The screen at the end of the video says MCMLXIV; Roman numeral for 1964.

@richardcook6284

7 жыл бұрын

FM is a type of modulation and used on bands other than the FM broadcast band. Most scanner frequencies use FM. TV sound is FM.

the education that was

Still useful in 2020

Sorry if i'm being stupid, I have my Electronics college exams coming soon, and am scratching up on some things learned a few years back, I assume that by "Kilo-Cycles" this also mean Kilo-Hertz? And vice versa for Mega-Cycle = Mega-Hertz?

@danalee1000

7 жыл бұрын

Yes, that's right.

@georgestarman

7 жыл бұрын

Ok, thanks for the quick response.

@abishekraju8787

5 жыл бұрын

yeah of course. Hertz is a measurement unit for cycles (or frequency). Its like saying Distance and kilometers or miles are same (which they are).

I REALLY wanna know how this motion graphic was achieved back then.

@Rocketman1219

2 жыл бұрын

I don't know about this specific training film, but the US Government used to contract out a lot of animation work to Disney and Warner Brothers (the infamous Private SNAFU cartoons were made by WB). So, it is entirely possible that this training film came from either the House of Mouse, or Bugs Bunny land (the narrator even sounds similar to the one Disney used for the True Life Adventures series).

Its a brilliant video - if you have learnt about waves and frequencies first No hating Loved it x

excelent, thank you for you video

fascinating

Thank you

I use FM alot

great great video

any videos like this?

@louf7178

6 жыл бұрын

ch0bits You just watched a video. With audio.

Thanks

I have herd that analog TV used AM for the Video in color or B/W and the sound is FM.

@jmil2tx

8 жыл бұрын

+Sean Zappulla Exactly right. If you had an old analog channel 6 station in your area you might have noticed that you could hear their audio on 87.7 FM. If you had a scanner with the right coverage you could listen to other TV stations' audio as well.

@lawrencegoodwin6687

4 жыл бұрын

jmil2tx Wow, you just brought me back to being a very curious 8 year old boy in the 1960’s. I remember discovering hearing tv audio on what I think was a crystal radio.