AM and FM Radio As Fast As Possible
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- เผยแพร่เมื่อ 28 เม.ย. 2016
- AM & FM radio have been around since way before the digital age. How can radios decode AM & FM signals only using analog technology?
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1:43 What's so cool about this, is that when I play my electrical guitar with headphones near my room windows. I pick up a radio station . at first it was scary I thought I hear voices
wow thats weird!
It's called bleedthrough and it's very common with analog devices especially ones that are poorly shielded. They act like a rather poor radio reciever.
I've had a few tape decks that doubled as low volume single station radio recievers.
@@plateshutoverlock I use a dongle with my iPad cause the case is too small for an aux cord, but dongles are fragile and sometimes I can hear the radio in my audio
AM follows the curvature of the earth , well that’s a slap of reality to the flat earthers
wrong! what made you think of radio tower as high as tower buildings if it relies on the thought of your curvature earth?
@@daviduntalan huh? hello flat earther. please explain how a spherical earth doesn't need high radio towers.
@@tempeleng oh i'm sorry i'm totally wrong, we need high radio tower even in your thought of spherical earth but i still believe that the earth is flat and the Sun is small than Earth and it's illuminating locally.
@@daviduntalan The world has gone to shits. There too many Flat Earthers, Anti- vaxxers and "enlightened' conspiracy theorists claiming the Governnment is trying to control us through Covid.
The earth is flat
Would you like AMMMMMM or FMMMM?!
In the Netherlands we have DAB+ radio
It uses the FM band though
FMMMMMMMMM
Nope, DAB is broadcast on band III. That's around 200 MHz, not 100 where commercial WFM stations are.
Lol the Suite Life reference?
FYI: Analog signals aren't "decoded". They are *demodulated*.
+vwestlife Linus uses codecs instead of modems xD
I wasn't expecting you here
FYI: I got brain cancer from all this misinformation.
VWestlife Can't we say modulation is a kind a coding ( without being technically accurate).
To add, digital signals aren't decoded either, they're also demodulated. Digital information is encoded in some form (or sometimes left as is), then modulated for broadcast, then demodulated, and lastly decoded. The encoding can give the data signal more favorable properties for the modulation that is to follow.
Gaze upon me and know me, for I am among the rarest human beings on earth.
I have a full-time job on AM radio.
Full....time.....job...........on AM radio.
What's your station name?
Damn.
@@Nostalgicguy2242 idk but his username might be it, at least for his show's name
what frequency and what power
Queen AM?
1:00 The sound wave is not added to the carrier wave, it gets *modulated* with the carrier wave. By adding it you would emit your sound wave throughout the entire spectrum, causing heavy interference with every other radio station broadcasting.
I have watched a dozen videos of people explaining modulation... AM and FM, and no one seems to get it right. I was just bored surfing the web is how I ended up watching them. I understand how it works, and apparently you do also. Why don't these youtube experts? What frustrates me is the comments like "Wow I finally understand" So sad.
Put into consideration on how during WWII when 700 AM WLW (Cincinnati, Ohio) was broadcasting on an outstanding 500 KW of power, at which the entire world could hear the local news as well as keep the troops updated on the wartime news to the point that Hitler himself called the station a nuisance. Fortunately for anyone who would care enough, there's a video on here where a guy walks around the station and shows the massive retired all-tube transmitter, water cooling system, transmission antenna, and power transformers for the old 500 KW setup.
Link?
When you hear clear channel in their ads..
More wattage for your cottage!
KGO WGN were also clear channels. They overpowered anyone on their channel.
Today 700 WLW is clear channel after dark. 50Kwatts..
Located in Mason Ohio.
Just up the road used to be the Voice of America transmitter array. Until they shutdown landline phones,tape recorders, phonographs would pick up VOA as background noise..
HAM and Shortwave as fast as possible!
VHF and UHF as fast as possible!
NTSC and PAL as fast as possible!
NTSC is US/CAN standard (60 Hz 120V)
PAL is the European/Australian/Asian standard (50 Hz 230V)
@@boiii3productions945 The voltages don't matter, NTSC and PAL are Video+audio standards
Great explanation, makes it look much simpler than what i thought it was. Please also do a dynamic vs basic disks as fast as possible!
Yes, Justin Bieber's "Greatest who put that shit in my script" is indeed an amazing album.
My dad taught me how to make an AM radio using simple things found around outside. It's good for emergency cases when all other high-tech communication goes AWOL.
please show me how
Some people just ain't meant to learn certain things and I'm one of them 😂😂 none of this makes sense to me but if you wanna give me a list of materials id need to make a speaker i might be able to process that
Some people just ain't meant to learn certain things and I'm one of them 😂😂 none of this makes sense to me but if you wanna give me a list of materials id need to make a speaker i might be able to process that
Some people just ain't meant to learn certain things and I'm one of them 😂😂 none of this makes sense to me but if you wanna give me a list of materials id need to make a speaker i might be able to process that
Some people just ain't meant to learn certain things and I'm one of them 😂😂 none of this makes sense to me but if you wanna give me a list of materials id need to make a speaker i might be able to process that
Hey man, look at me rockin' out, I'm on the radiooo!
SYSTEM OF A DOWN!
Hey man, look at me rockin' out, I'm on the videooooo!
@@synanthrope With Danny and Lisa
@@theeverythingchannel5457 Thank you for replying to a 2 year old comment
@@theeverythingchannel5457 they take me away frooom
> death metal
> shows Slipknot's Mick Thomson
+Alex Ehler (THOUGHTSEIZE) i lol'd too
+Alex Ehler (THOUGHTSEIZE) how dare he
he should have shown lord worm feeding his fans worms
>greentexting
+AyyGin No, It's Nu Metal.
Windows Registry As Fast as Possible
yes, it would be great
+FlappySock xD you got that from Pyrocynical, right?
+LeadwayVideoProductions This is good, though technical.
***** Not really, but to modify or tweak it requires technical know-how.
***** Well if you just mess around with system keys you will probably wreck your Windows...
"Death metal" - picture of Mick from Slipknot
Was wondering if anyone else noticed...
hahaha I love death metal... I hate slipknot
Lmao
>death metal.
>slipknot image
Came for this
+Brewskai I used the search function as soon as I heard that.. LOL
+Brewskai >greentexting
+Steven Tyler lmao you think
+Brewskai exactly my thoughts
Wow, thanks for covering this topic! Some relevant tech here! Learning about radio and sounds, for me, was the way I started learning about electronics. Wireless sounds are fun.
Nicely explained, Linus. Though your explanation on AM vs FM when it comes to skywaves vs ground waves is easily misunderstood. Using the ionosphere to reflect radiosignals is done at longer wavelengths/lower frequencies yes, but regardless of the modulation scheme.
I was here 5 years later just to check that someone had pointed this out! :)
@@thomaseriksson36 TBF, the is focused on the commerical AM/FM broadcast bands. It IS possible to use FM on SW or (even MW) frequencies,That explaining that might be a bit "out in the weeds" for a "Quickie" video.
@@thomaseriksson36 HaHa.... so many errors in this video
love it! I was just thinking of fm and am on my sleepy drive to work this morning for some reason. perfect timing and great description
Answered all question I had concerning frequency modulation I was afraid to as, explained in a fashion even I would understand. Thank you, Linus!
Wow I am very impressed by how good the complexities of radio modulation were described by using very basic analogies. The "transformer" used in FM may not be the right word (at all) but that can be forgiven. As an engineering student I say well done!!!
IF modulator? Discriminator? Oscillator? Radio tech is weird.
Wow I literally asked myself this question about the difference between AM and FM a day after this video was released.
Thanks for the content! i just started my hobby as a radio listener and archive 6 days ago, and this realy helped me understand what AM and FM is. Thanks comrade
If you had posted this a few weeks ago, I would've passed my Physics exam! 😂😂
+Exodus227 another one down. RIP in pieces.
+Aviator Mage Forever remember and carry on my legacy.
+Aviator Mage Never forget..
+Aviator Mage Never forget..
Fuck Off Now, Dropout
Great video. Good job!
Dude, Josh also watches LTT, we are basically friends now.
would you like *AM* or *_FMMMMMMMMMM_*
Linux As Fast As Possible!
I'd rather do linus as fast as possible
+Hunter3901 narh man, Linux is more popular!
yes
TheFilledk no I would DO linus y'know what I mean?
Did not take long for someone to make this into innuendo.
lol. 99.5 FM is actually my favorite radio station where I'm from.
Mine is 88.1 FM
103.9
+djapster Nothing here att 99.5 but at 99.2 ther's a local radiostation which is mostly some old religious guy speaking about Jesus. I prefer 98.4 which is a swedish station or 93.9 which is a danish station.
99.7 here :D
94.7 here
Trust me when I say that while this is a good high level overview... the actual math behind AM and FM can be a bit mind boggling. Learning digital modulation techniques now and to start we covered AM/FM. Trying to find the frequency spectrum of an FM signal of a certain data signal and carrier frequency is a pain in the butt. The practical solutions that we learned still only estimate it (carson's rule, bessel functions...etc). Additionally, one might be interested in knowing that FM itself is only a type of angle modulation, one can also instantaneously vary the phase of a carrier signal to represent data (PM), the result looking very similar to FM but tracking different data signal properties.
I can't believe the perfect timing of this. I have my physics exams and AM and FM are part of the syllabus. Thanks for this, Linus. :P
+Zahab Ahmed Qureshi you probably need to study anyway :D. These information are pretty basic.
I think AM radio is adjusted by a ferrite rod going in and out of a stationary coil. It's not the coil changing its structure, although mathematically it is changing its inductance.
+K Doe For tuning? I believe that the aerial is pretty close to a potentiometer, if not actually a potentiometer.
+luke timothy I remember analog tuners used both adjustable coils and capacitors. Newer digital tuners tend to use potentiometers, as it's just some voltage difference input to a chip that controls everything.
What is a potentiometer if not an adjustable coil?
'tis 2021 and this video taught me a lot about radio and communications. Keep up the good work!!
Great rundown! I love this channel lots of good info!
Why don't we just reLAAx, we'll turn on the raADIOoo? Would you like AM, or *FFFFMMMMMMMMMMM?*
WELL, I have to watch this for school... i love linus
You have done a great service for my manufacturing project about Radios. Thank you so much!
It's pretty amazing to pick up some of those far off AM stations at night. I remember driving through Nevada and picking up KCBS loooong before I got close to the border.
If I put on the radio there's only 2 things I hear: pop music and commercials.
I hate both with a passion.
You must be really old and crabby...
I'm old and I like pop music, techno, and dance.
Even though Im too fat and uncoordinated to dance LOL
Weebles Wobble but they dont fall down ha ha ha
I hate both. I wish it’s more sorted out
Change the station, dipwad.
Bruh, I used to receive a noisy signal from a metal/alternative rock station, and then some jackass decided to overpower it with Christian pop.
I am right there with ya... pop music is a horrible horrible thing
Also, FM is actually a subcategory under something called Angle Modulation. Angle Modulation consists of Phase Modulation (PM) and Frequency Modulation (FM). This is because in application they are varying the angle in a cosine function. Thus the name: Angle Modulation. FM actually changes the frequency, but when you add an angle in the cosine function, we call that the phase modulation, and pretty much just shifts a signal left and right (hence the name Phase Modulation).
It gets a bit more complicated with radar applications.
Nice video!
I'm the Chief Engineer/Operator for my college's FM radio station and this was a nice overview of the technology.
This was actually a really good explanation. Thanks!
Someone once told me that Radio was sound waves....I cried and laughed on the inside at the same time.
Lol
I miss having FM in my android phone. My first one back in 2010 was a Droid X and had FM radio!
+Robert Tinsey sony xperia z5 still has it :P
+Robert Tinsey Some can still use FM radio by using a Bluetooth headset as an antenna. I know my windows phone can.
+Robert Tinsey still rocking my fm radio with my lg g4
@@alcidiowwell dump your lg phone as I bet the battery is so old I bet it doesn't even hold a charge long at all and remember you can only use wired headphones with a phones fm radio(wireless will not work with it,only wired will)
Great topic and well done, thorough explanation!
Thanks for the recap, needed this for an exam
Here in the Philippines, FM is for music, and AM is for news! XD
Hehe. Tama (Correct).
I thought AM was morning radio and FM was afternoon radio .-.
me too
actually it is not morning/afternoon it is amplitude/frequency modulation
@@boiii3productions945 actually he's right about "AM" being "morning radio", the human ear isn't meant to perceive the loud, blaring, stereo sound from FM signals anytime before noon.. The kids who wake up to FM radio go deaf in their 40s....
Yea man me to
@@boiii3productions945 He's right about morning radio being AM. Even the clock agrees! If you get what I mean. XD
Thanks for the quick shot of my hometown's skyline, Charlotte, NC at 5:01! Always learn something from your AFAP Tech Tips.
Thanks, that clears up a lot!
3:35 That wave's AM, so that's correct
3:40 That wave is still AM dude (Its not FM) lol
Thumbs up for the picture of Mick Thomson. That guy is like my Kobe.
Radio trivia note: The old (analog) NTSC television signal used both modulation types: AM carrying the video portion, FM carrying the audio!
Well done. You have real content and thought - the humour and the irreverence just make it fun. Thanks.
What would it take to receive permission to show this video to communications students in a community college classroom (as a basic introduction to transmitters and receivers)?
sterlingtardie Email them.
Whenever I turn on AM radio it feels like there is gonna be an announcer saying 3 nuclear bombs has detonated in 3 major cities
omg, i love those "explanation" videos, you are awesome! :P
Amazing! that what's is in the atmoshere hears and sends back its response
You mean Atmosphere
How LCD screens are made as fast as possible
+SecretPotatoChip Today on How Its Made: LCD Screens
+GonthorianDX I was gonna say this isn't how it's made haha
SecretPotatoChip I would like to known too hahahaha
+SecretPotatoChip Check out engineerguy on youtube, he made a good video about screens.
First we need to get lots of water.....oh lcd not lsd sorry dont mind meee
Learned all of this years ago at Avionics School in the Coast Guard, and this guy does a very good job explaining things spot on and very succinctly.
I'd like to see him explain, in an equally efficiently manner, the math behind finding the voltage drop on one resistor on a circuit board. That would be interesting. :)
I went to EW school. I know NOthing, nothing
Like SGT Shultz
th-cam.com/video/HblPucwN-m0/w-d-xo.html
Thank you Linuds! Great video.
Thanks for this one! I've often wondered how radios work :)
I fixed an old radio for a friend but i could only get foreign stations. I remember a Chinese one and a Spanish one and if memory serves me right a Russian one too. This was from Ireland and the radio was in a place FM radio would have trouble picking up a local station, So if somebody can explain id appreciate it :)
One thing I found weird with fms is if you’re listening to 99.5 fm (for example), and you switch to 99.4 or 99.6 you can still hear the same station as 99.5 although you can hear some static.
I live in India and here we have more fm stations compared to am. I listened to both fm and am and I find that in am volume goes up and down and in fm I can hear static sometimes.
Thats why the frequencies tend to be separated more. Like the radio would jump from 97.0 to 98.0. That gap reduces interference. Using decimals makes interference have a higher chance.
VERY good video! Happy to see something like this.
thanks for the info!!
AM and FM have nothing to do with wavelength... they are just modulation types.
FM broadcast band is typically 88-108 Mhz while AM broadcast is 540 Khz to 1700 Khz in the US. This is often called Medium frequency band. Medium frequency can bounce off the ionosphere at night.
FM broadcast is in the VHF band and is typically line of sight. There is cases where you can here it for long distances. Tropospheric ducting and bouncing off the ionosphere called e-skip. These effects however are very rare and uncommon.
Question: If you modulate the frequency as in FM, you automatically modulate the wavelength, or am I mistaken? (I'm very knew to grasping this subject so your comment threw me off - 5 yrs later lol) Be well
@@Ben-fn2eb yes because wavelength is directly proportional to frequency -> wavelength=[speed of light]/[frequency].
@@oioi-dn4bu hey, gotcha.i wasn't thinkinhg with the speed of light being a constant factor, thank you!
Remember: sun up frequency up, sun down frequency down.
This seriously helped me figure out how radios work and how the Emergency Alert System (and the Emergency Broadcast System before it, and the CONELRAD/CONtainment of ELectromagnetic RADiation system before it) works and how you actually hear the annoying tones that tell you to 'Listen up, bonehead, because somethin' bad's going down soon or already is.' Thank you, Linus, for this explanation and your later one on the EAS, despite my knowledge of the latter.
You can transmit and AM or an FM signal on basically any frequency. Broadcast bands have been established that places commercial AM broadcast on lower frequencies (535kHz to 1700 kHz) and places commercial FM broadcast on a higher frequency band (87.5 Mhz to 108 Mhz). With the right equipment you could easily transmit an AM signal inside of the commercial FM broadcast band (87.5 Mhz to 108 Mhz). I have a transceiver at home that allows me to transmit AM at 144Mhz or FM at 28Mhz. AM and FM are modes, bands and frequencies are different.
Wish you included DAB radio in this video :(
+BLAQSONiC well it's more expencive, complicated and not world wide adopted. My country started getting DAB in 2011. but people still use FM and AM.
So my goverment is shutting down FM and AM to free up these frequenzies in 2018? or something like that.
BTW.. I live in Norway.
+BLAQSONiC its the same as fm but instead of using a audio signal to modulate the frequncy it uses digital signal so on or off where high change in frequncy is on low change is off.
True. Norway is shutting down FM this year...
@@SigurdKristvikyou mean frequencies and expensive
"WOULD YOU LIKE AM OR FM", the first thing I thought of when I saw this video, now if you will excuse me, I need to fix my car, I think the prndl is broken.
Mr. Moseby op
i thought the same thing
Thanks for the flashbacks to my signals processing course linus. I really needed a good dose of not knowing what is going on.
Your videos are the best!
Do VHS as fast as possible
FM Radio, why is it popular? Free, sounds great, local
+Walnut Spice Why are you everywhere?
JJ Warner I'm everywhere all the time
Walnut Spice So you're omnipresent?
Walnut Spice what are your favourite AM stations?? Name at least six of them....
Yeah pretty much. Listening to radio is free, but you have to pay for the radio. :^)
Thank u guys! For your videos! 🙌🏻
I need another Techquickie channel explaining this Techquickie.
“A.m. is fine for talk radio” tell that to my boss lol
Windows Restore Points as fast as possible?
Bullshit
+blueman24 youre right
One of the rare , easy to understnd explanation of AM FM ! tx
Sorry to break it to you but this videos has serious errors.
Great work. Keep it up
I would listen to radio, but I don't have a car yet...
Radio, the original streaming service 😎🍹
Thanks, for the lesson, you explained better than most.
You dickhead,it is nothing like that
It is only and explanation Video
Excellent job, thanks!
what about DAB?
Well reverse that word for your answer
Edit: oh wait nevermind this comment is actually from 2016 or 2017
+linustechtips IT IS NOT as simple as a couple of wires!!!! Tuner circuits are beautiful LCR circuits. When you turn a knob, you rotate plates which change the common area between parallel plates, thus changing the capacitance(C). This in-turn changes the resonant frequency of the circuit(because resonant frequency omega=1/root(LC).
+Kaushik Harith It is also possible to make an AM radio using only a variable coil, instead of a fixed coil and variable capacitor. In fact, most older car radios used variable coils, known as "slug tuning".
vwestlife Interesting! How would one change the no of turns of the coil/length of coil/Area of cross section? Those are the factors that magnetic field depends on and hence Inductance(because L is flux per unit induced current.). I can't picture any easy or efficient way of doing so. The only easy way would be to change the permiability, but that would limit you to using two frequencies.
Kaushik Harith The physical coil of wire stays the same. To tune it, you slide one coil in and out of another coil, or slide a metal slug in and out of the coil (hence the name "slug tuning").
vwestlife That is what I thought. But how would we get a continuous distribution of resonant frequencies?
+Kaushik Harith google it buddy.
Merci beaucoup Professeur. Je trouve cette vidéo trés utile...
The way I'm interpreting his video is that when you tune your radio receiver to a certain station, your tuning to the carrier wave frequency. The carrier wave is just that , a "carrier". The stuff you want to listen to (also a analog signal) is superimposed with the carrier wave, then off they go into the wild blue yonder. Your radio receiver's antenna will pick up the signal, as you are tuned to the carrier frequency (if I' m interpreting his video correctly) .
why are radio station frequencies end in an odd number? its always 98.9 or 104.5 but never 100.6 or 99.8?
I know that there is a .2 difference in the frequency to keep stations from bleeding together but why odd numbers?
There a radio station in my area called power 98 but they are 97.9 on the radio channel
it's because odd numbered frequencies have better range that even numbered frequencies for some reason.
+Suhkma Dheek yes. I understand now. thank you
+Kirt Thelander FM stations in the same area need to be spaced apart in order to avoid interfereing with each other. In North America this is accomplished by allocating the FM channels only on the odd frequencies. In other parts of the world, they use both the odd and even frequencies, to allow more stations to fit on the band. (AM stations are also allocated on different frequencies in Europe and Asia, with 9 kHz spacing between channels, instead of the 10 kHz spacing used in North & South America.)
I find analog technology, although technically inferior, way more fascinating than digital technology. It seems so much more difficult to get right that the fact that it can end up sounding or looking as good as digital is mind blowing.
Analog technology can be improved not so with digital. With digital there is a finite standard (1's and 0's) in order to change any quality a new "standard" must be developed. With analog things just get better with better components.
@@rty1955however,more interference will always occur with Analog devices which is why Analog devices got phased out in favour of more reliable and higher quality digital devices
@@stephensnell5707 as analog devices get better, LESS interference or noise will happen, but in a digital world, everything is finite and requires a new "standard" to be compatible.
You can improve analogy, but you cant improve digital
wow thats sweet. My father use to tell me he could hear radio stations from Florida back in the 60s (all the way from northern Jamaica), didnt know AM radio had that property
thank you i was doing a science test and this was in it and it REALLY helped me
my phone's loaded with music streaming apps but a lot of the time...I'm just listening to a local fm radio station on the next radio app that unlocks the fm chip in the phone :I
what is your phone?
+majed .salame My phone, GTC m7, have built in FM radio, just need to use headphones
+majed .salame
I'm currently using a Samsung Galaxy j3 2016.
I'm also on Virgin Mobile (prepaid Sprint) I know most android phones outside the US have the fm tuner usable but it's locked away over here. Sprint lets their phones use it but with an app called Next Radio. Most there for sone added ad revenue though o_o
@@borrellipatrick oh yeah
Hey kiddo, you're not old. Your first computer was a AthlonFX.
love u guys videos. keep it up!!
I love to dx AM radio at night. The furthest station I've picked up was AM 870, WWL out of New Orleans, which traveled almost 1900 miles. AM 1040 WHO is a common station here too, which is roughly 1500 miles away. DXing is so fun. Its the thrill of finding that long distant radio station, way, way out their. You need a good AM radio though, with a good AM antenna. I never have tried, but the "graveyard" frequency's are a jumbled mess, but there are people who try ( and successfully catch ) distant radio stations in the rumbling audio.
DAB Radio As Fast As Possible!
Battery Percentage As Fast As Possible
Awesome videos man =)
Hey when have u opened this channel amazing explaning
Short Wave Radio as fast as possible
+joebob2311 It's a variation of AM that takes out the carrier wave and just uses the difference (sideband)
It then bends around objects or bounces off the ionosphere, similar to a laser through dust.
+joebob2311 My first thought as well.
+waterlubber No, that's SSB (Single Side Band) you're referring to, not shortwave. Shortwave broadcasting uses Amplitude Modulation, just in a different frequency range and with higher transmitter power levels, allowing shortwave broadcasts to be easily heard thousands of miles away. More properly, what we refer to as "AM" is known as Mediumwave (MW). In the Eastern Hemisphere, the Longwave (LW) band is used for AM broadcasting as well.
vwestlife Well, shortwave covers the HF band of the spectrum and a LOT of broadcasts there are SSB
waterlubber A lot of amateur radio operators use SSB, but not a lot of shortwave broadcasts. The vast majority of shortwave broadcasters use AM; some use DRM (Digital Radio Mondiale) and only a handful use SSB.