How to make the world's easiest Radio ! Do it yourself at home!

[@pedromeza2398]

In the 1960s elementary schools a lot of your builds were common practice during science class, this built a hands on science foundation in many young Americans. It's sad to see that today's young students don't receive science hands on like it was done in the 1960s.

[@bearwastaken6579]

heck it took me 2 months of research to find one video about the spark gap radio (which i followed, built one, and made a video)

[@ynrikotowers4374]

Yeah its sad that today we lack this things

[@OnE61811301]

But OMG it's soooo dangerous - what if your priceless spoiled brat child gets stabbed by those deadly sharp antennas? What if they get zapped? Can you imagine the trauma?

[@FreeKraps]

That's what happens when the military complex & tax cuts tanks the entire public sector

[@w8lvradio]

We got that science in the 60's in our schools for one and only one reason: Sputnik. They were determined to outdo the the USSR. And as a result? We got GREAT Science training. Were can a kid go with that? Well...you just never know ...;-) But I owe EVERYTHING to that training. 73 DE W8LV BILL

[@Dan-gk7ti]

My brother and I use to buy Galena radio, very simple device you put a wire to ground, small earplugs in your ear, twiddle a knob who travel along the Galena stone, to find a station and you had a receiver. Then with old tech books, we build basic amplifiers, who needed a 3V battery plug the outlet to it and a speaker the other side and we had proper radio :o)

[@kunasagaran5933]

More of these simple experiments or projects are required to create an interest in young kids. You have done an excellent job. Thanks.

[@TrangertoR]

really man?! It is 21 century man. Maybe nobody told you but we know how earth become created.... It is not God...

[@alansturgess1324]

@@1islam1 Enough of the evangelizing.. There's always someone who wants to quote the Quoran, bible, Tanakh etc. etc. as if some random quote is proof that a god exists and all we do is validate that through everything we do. What a load of YKW. Now let's just enjoy the creativity of this demonstration.

[@mohamedmaishan5953]

Yess im 12 and im realy interested and im think im pretty good at this

[@kunasagaran5933]

@@mohamedmaishan5953 it is a great start. Keep experimenting. Read more. Lay your hands on every book on electronics and science. Eventually, you will become a great man and I wish you success in all your endeavours.

[@free-energy-systems]

Sadly "apps" have been replacing an interest in actually learning something.

[@jerryfacts9749]

In 1897 Hertz made the first spark gap transmission. He used a high voltage source with a spark gap in series with a coil forming a resonant circuit. He used an identical coil on the receiving end. Detection was with a coherer tube. He was able to transmit an electromagnetic wave pulse wave through the air to a distance of a number of meters across the room. This was actually the first man made radio frequency pulse. Very soon after different and much more efficient ways of detecting radio waves were innovated. It is interesting that with no resonant coil this experiment works. It is really a very crude inductive reactive transmission. It is like forming a capacative coupling using the air as a dialectic between the transmission and receiving antennas.

[@eventhisidistaken]

This was the sort of thing that got me interested in engineering when I was a kid. Very nice! Another simple one, if you haven't already covered it, is a crystal radio. I used to make them as a kid and made them fit inside a ball point pen (except the earpiece, which stuck out the bottom) and sell them to class mates. ...that plus simple shockers made from nothing but a relay and a battery.

[@radioheadluke]

amazing! do you remember how you made those crystal radios to be so small?

[@eventhisidistaken]

@@radioheadluke I tore apart a small transformer from some broken something, and carefully coiled the wire around the ink tube until the local strongest AM station came in - basically the coil arrangement is a fixed tuner, meaning you only need the coil, the diode, and the earpiece to pull in that 1 station.

[@johnstonesakwa1.0]

I’m still a kid and I love engendering

[@OldGrayCzechWolf]

Very nicely done spark gap radio build. To think that this was how it all started, early Marconnni sets worked this way. Even the signals sent from the Titanic were sent using a variation of this. Kudos!

[@TorbenWelz]

truly fanominal how far we've come isn't it, I can't wait to see how far we'll make it in my own lifetime

[@OldGrayCzechWolf]

@@TorbenWelz Phenomenal, not fanominal. Learn proper English and spelling and people will respect you more. English is the third language I learned and I think it is very disturbing that I have better English skills then 99% of Americans.

[@iHeartAmySue]

@@OldGrayCzechWolfI notice that knowing three languages have not prevented you from being a jack ass.

[@charliebrownn6622]

@@OldGrayCzechWolfslow down turbo… it’s a KZbin comment, not a tesis bato, pls seat, relax and learn some Spanglish too 😎

[@markkinsler4333]

In fact, if the Titanic hadn't had radio (owned and operated by the Marconi Co.) nobody would have known what happened to the ship.

[@MuratIsikHome]

I will use it to help my son's physics assignment. Thanks very much from Istanbul.

[@gigmach]

Best example of an amplifier I've seen on KZbin ever. Well done

[@peteshugar7220]

but it is not an amplifier, it is a switch. comm 2nd class 50 + yrs

[@rouxenophobe]

@@peteshugar7220 I know nothing about electronics, but the effect looks like amplification to me. He could receive a weaker signal further away and make the LED flash. He increased the sensitivity of his receiver, would you not class that as an amplifier?

[@gabrielsantos19]

Looked for this a time ago, but didn't found. Now, KZbin recommended me this video. Better late than never :). Thank you.

[@johnwest7993]

I like it. A modern day version of the experiments conducted by Hertz proving the existence of radio waves.

[@vmcv3284]

in my early school years in Spain we always had from primary school to all the way high-school a class about creating stuff, from art to modeling to electrical stuff , wood working and many more things..

[@patricktinkham]

I love this re-creation of the Hertz experiment! Well done!!

[@DavidALovingMPF102]

Spark gap transmitter. Very good. Same can be seen in a car if you use copper wires going to the spark plugs. You will hear the pop pop pop on the radio. Very early jamming technique too. Good job!

[@alf3071]

what kind of transmitter is used in anti aircraft radars?

[@DavidALovingMPF102]

@@alf3071 Holy Cow! LOTS! TOO big of a topic to discuss here and I don't know it all! I barely know anything.. 6 years only in USAF EW. Use google. There is Search radar, Track, Scan, Guidance, Radar for guns (AAA) on the ground, some on jets. Radar for SAMS. Lower frequencies for searching the skies. Higher freqs on missiles..Read up on ECM. Read up on CHAFF..cool stuff. research Range gate pull off and repeaters, traveling wave tubes and magnetrons. Viet Nam ECM pods. Ok, that's a HUGE assignment for you. and don't electrocute yourself!

[@pianoguy5110]

@@alf3071 Anti-aircraft radars typically use a type of transmitter known as a magnetron. A magnetron is a type of vacuum tube that generates high-power microwave pulses. These microwave pulses are transmitted from the radar antenna and bounce off objects in the air, such as aircraft, and are then received back by the radar. The radar system uses the time delay between the transmitted and received signals to calculate the distance and direction of the aircraft. Magnetrons are commonly used in radar systems because they are capable of generating high-power microwave signals at a relatively low cost.

[@geoffroberts1126]

Mmm.... I'm thinking this is not radio as such. It's a DC pulse that produces an EM field. But it's a great way to illustrate how it works for children.

[@michaelschmidt7014]

I am 73 now however in the 1960's in the St. Louis area we had the St.Louis Post Dispatch Science Fair. The Post Dispatch was a local newspaper in St. Louis . All of the metro area school districts would hold their own fairs and the First Place winners would then go to the St. Louis Post Dispatch exhibiting at the Washington University Field House. It was very exciting for a young student I went 4 or 5 times.

[@MT-in3tp]

The simple amplification circuit was very interesting, you have re-invented hertz radio :-) большой молодец

[@daemonwhitebeard6590]

Just like a Coherer Receiver minus the Coherer Switch. It is also like a tiny Spark Gap Transmitter. Cool video.

[@MatthiasLenardt]

Very simple but effective experiment

[@imdadali4292]

We have to take more care in order to keep fingers and/or hands away from antenna of the transmitter when pushing or releasing , otherwise a high voltage shock will welcome to experimenter due to dealing with 'high voltage spark gap generator'. But very good way of practical.

[@emoryschley5546]

This is difficult to understand with TWO audio tracks competing with each other. The one in the background should be deleted so it doesn't interfere so much with the narrator.

[@PatrykPonichtera]

In Poland for foreign movies we have a narrator reading over the original audio exactly like this, one narrator for all the voices, imagine having this for every movie on TV 😅

[@diegoteclas]

Autist hearing cannot separate the sounds and moreover all the sounds reverb in their head like hyper amplified and same intensity

[@daisuki9296]

You're a very old man I think

[@Berghiker]

With a coherer, a distance of up to 3m is achievable with long wire antennas connected to each end of the transmitter and receiver.

[@antonio-c.o.]

The distance at which a spark can be detected by a coherer system would depend on the energy of the spark generated by the sender. The Calzecchi Onesti coherer could react to Lightnings many kilometers away…

[@Berghiker]

@@antonio-c.o. As far as I remember, I used an ignition coil.

[@greenaum]

People stopped using coherers once thermionic valves aka "tubes" were invented, making amplification possible. Round about the First World War. Rather than a coherer, properly tuning the transmitter and receiver, and a properly designed reciever, would give a greater transmission distance. Or at least would do in 1915 or so when the airwaves were pretty quiet. Nowadays none of that ancient stuff would work, cos there's so much radio noise now. There are certain areas of the world, where all electronics are banned, because people want to use radio telescopes there. These are giant dishes that pick up the extremely weak radio waves emitted by stars, rather than their light. If you want to do that, you need quiet, so a few places have ordnances in place. Mostly nobody lives there, but you get the odd back-to-nature weirdo.

[@antonio-c.o.]

@@greenaum True enough, but by the same token people stopped using thermoionic tubes when the transistor became available... but here we are talking of the coherer. BTW, get a lead sulfide crystal, a battery, a piece of wire, a variable capacitor and an earpiece and you will get a tunable radio receiver without the need of a coherer, a thermoionic tube or a transistor :-)

[@greenaum]

The point of mentioning the thermionic valve is that it obsoleted the coherer there and then, right back in 1915 or whenever. Coherers were ridiculous. Right on the edge of functional. Really the issue is just an LED makes a lousy detector, but they're cheap and ubiquitous, often there's one in the same lighter you got the sparker out of. So trying to "improve" a circuit that was designed to be made from bits of scrap for pennies, with something as tricky and expensive as a coherer, doesn't serve any purpose. It isn't supposed to be a practical device, it's just a demo using the level of technology Herz had, without requiring a VDG generator, which is certainly old tech, but horribly expensive then or now. This thing is in the sweet spot historically and technologically, and most importantly, is made only of bits that can be found inside disposable lighters, and a bit of wire.

[@isabelleg.4294]

Great to know as we might need this soon for survival!

[@nicholasorro1105]

this is a wonderful and perfect video. thanks a lot for sharing it. Am Nick from Kenya

[@AzazeL-LCB]

You know what this reminded me of? Tesla's transmission of electricity through the air, its literally that and easily understood now. I like it 👌

[@CanadianSmoke]

Excellent video... I remember hands on science in science class when I was younger.

[@stephenbrinckerhoff3510]

I'm not sure if this is the easiest. I do remember hearing about radios made by POWs during WW2 using a needle, a double-edge razor blade and an egg shell. And I know from personal experience that a thermostat with spiral coiled spring can produce nearby radio signals. It took me a few days to track this one down.

[@clarencealexander1093]

I am looking for a WWII version also.

[@themartianway]

Fox hole radio.

[@hokep61]

@@themartianway Correct! The hardest part could be finding an old, steel, double edge razor blade. Not sure if the more modern stainless ones would work. Would also need old style carbon or crystal earphones. Don’t think the modern earphones would be of the correct impedance.

[@laulaja-7186]

Eggshell? I thought lump of coal.

[@WJCTechyman]

A spark gap transmitter and receiver, in essence. My have we moved forward from Guglielmo Marconi's experiment on Signal Hill in what is now Newfoundland and Labrador, Canada at the turn of the last century.

[@dalebenton3354]

done that before,Remember doing this when I was still back at School in woodwork and technology

[@verenagruber1890]

Grandios! Thanks a lot Kisses from Bern, Switzerland

[@w8lvradio]

An excellent modern presentation of Hertz's Classic experiment, but with dipole instead of loop, and lesson in amplification. My hat is off to you, Sir! All the Best! 73 DE W8LV BILL

[@34leaderzal9incacucic5]

Hi my friend William :) how are you :)

[@w8lvradio]

@@34leaderzal9incacucic5 Quite well, Thanks! Registered Nurse in the Covid Fight here, when I'm not working the Radio.

[@34leaderzal9incacucic5]

@@w8lvradio Very Well dear William, thank you an you know i watched every day a lot of videos talking about Covid from the begining to right now ;) and this is what i'm interested in

[@AaronSchwarz42]

I like that you can hear both languages at same time -- doing the audio in the native language & the English as subtitles would be even better // something to consider Cool video & nice DIY content education!

[@Edwinlegters]

This is why I disliked it at first, but the content is so good that it deserved a like

[@peteshugar7220]

but for those of who are hard of hearing, it is crap, it is just too hard to understand!!

[@gordonwelcher9598]

Use a CK-722 transistor. The emitter to base voltage is lower. You will have to reverse the battery as it is PNP.

[@Iridium43]

Yes Raytheon ck722 transistors. Barely working transistors sold for toys. Look up ck722 on KZbin.

[@familyfungi]

Perfect project for homeschooling. Thank you very much!

[@justingreen8006]

Who would vote thumbs down? This is a great demonstration and would be an intriguing experiment for kids. I would have loved this as a child and it would inspire many to search out why and how it works. Many would go on to become physicists and engineers and technicians.

[@alfonsedente9679]

Duh! Ppl click on this to make a radio to listen with? Mabee because the thumbnail says "radio"? Not LED twinkle thing.

[@EikottXD]

This is awesome also loving the new dubbing, or at least new to me haven't been here in a while.

[@satyamtiwari9816]

good to see it works actually i to have tried it.. thanks man

[@ToddHofer]

Classic Spark Gap transmitter. Nice job!

[@the1cartoongame1vlog34]

Omg i will subscreb know😱😱😱😱😱😱😱😱😱😱😱😱 You are the beast

[@dhineshd94]

Nice video😁

[@pat3034]

Awesome ... a mini Spark Gap transmitter!

[@Peter-rz9ub]

GREAT JOB. THX TO SHOW US THIS. HAPPY NEW YEAR TO EVERYONE...

[@richardatanacio4049]

0:04 Thanks for presenting the real transmission and reception of electeomagnetic waves..the application of the Theory of Magnetic Wave Propagation by James Clerk Maxwell lives on

[@Estabanwatersaz]

Greatest video. Thanks 🙏🏼

[@ruismodok8860]

Thank you so much of your content and your information. Now i'm understand about transmiter and receiver 😊

[@YuniorPradesMedina]

The most simple thing that made human live more confortable.a man made things.amazing AMAZING the simpliicity of this Discovery

[@peterchesko9537]

I wanted to hear some AC/DC! Thanks!

[@jimparr01Utube]

Ah-ha! Back to the original spark-gap transmitter - almost... Nice and useful clip Sir.

[@starbravo672]

Great discovery....! Great idea...! Thank you for the video...!

[@amfa7]

Very informative. Spasibo Thank you

[@CircuitCreator]

The way this video highlights the innovative features of this device is truly impressive.❤

[@d3ja527]

Awesome video😁 Respect from Serbia

[@fredsalter1915]

Fantastic video! Very motivating!

[@anilshirsat4406]

Very well demonstrated the concept of radio waves 👌👍

[@justacook6858]

Did in joy and respect the skill.

[@panchitomontero9051]

Well, I was expecting a simple broadcast from a nearby radio station.

[@sazurishin6688]

Same

[@zeez3139]

@@sazurishin6688 still impressed

[@Casual_laughter]

Bro just made a switch, wasted 3 minutes of my life

[@solocupp6120]

@@Casual_laughter Shut up.

[@duaneritter3932]

@@Casual_laughter ok? This is still considered a radio even though your not hearing sound..

[@ryan200978]

' Wow! Simply explained concept practically .. 🙂

[@shundhem_electrick]

Amazing video

[@theeronterranova7928]

This was good video

[@ed9763]

Well done. Very useful expt. to illustrate radio transmission to school kids.

[@jfrphoto01]

Also, outlawed by local laws (in USA: FCC) and international law!

[@lorisvila8008]

It also helped me understanding how an antenna works !

[@lacourarieeric7650]

vidéo très pédagogique et instructive la simplicité a l'état pure

[@ducomaritiem7160]

Hey, that's nice, thnx, I'll let my students make that!

[@jonkent928]

Thats so damn cool. Have to try this with my son

[@stephanwerick5495]

Great demonstration

[@TechsScience]

I haven't ever thought of it

[@Jemacaza]

Great experiment, also to spark children’s interest for physics

[@fredrickmwengi7370]

A good one dude

[@neilfurby555]

Excellent….well explained and easy to follow.

[@smartlearn9028]

Amazing..Ecallent...Great...As an electronic hobbiest and teacher i understand the great thought behind the demonstration... Thank you sir

[@Angelinuh2015]

Thanks im going to have my kids work on this with me.

[@-Gunnarsson-]

speaking of radio. Iv noticed my TV cable was able to pick up signal without being plugged in. Kinda funny 😂

[@cliveevrall1071]

Very interesting. Thank you.

[@brandonlaragirl]

Awesome, thanks for sharing!

[@donalfinn4205]

Very interesting.👍☘️

[@delljopshorseracingtips4693]

Made it fantastic love it sound is best I have ever heard love it

[@josealbert4596]

you are the new Rudolf Hertz . As receiver perhaps only is necesarry a mini neon lamp between the two arms of the dipole

[@neilfpv]

This is awesome!

[@BlenderArtist-s6j]

This video is gold

[@marekcm1882]

amazing and so simple.

[@mybluemars]

This is great, but it should be mentioned that not any lighter will work. You will require a lighter that has a piezoelectric spark generator such as the ones you find in an ordinary kitchen cooker lighter.

[@clarencealexander1093]

Your commentary is exactly why I read a lot of the comments FIRST on any type of these videos!!

[@clarencealexander1093]

I had to go to the dictionary for "piezoelectric ".

[@cristianpopescu78]

This is a really awesome Projekt!

[@doseboos]

More of these simple experiments or projects please

[@kostoglotov2000]

GENIUS

[@pierpa_76pierpaolo]

Interesting but I am interested in operation to cover a significant distance of at least 10 meters.

[@MrFreddiew1]

Wireless power transmission at its simplest...Tesla Bifilar coils might/should be better, might need a resistor (50 Ohm) to protect the LED. Nice little project, thanks for the video.

[@wildwoodmiami]

The professor made a radio from clam shells and coconuts on Gilligans Island.

[@גילקיפניס]

A very good idea. Thank you

[@tomypower4898]

cool radio signal!

[@jeffreykpan3544]

Genius experiment

[@incognito0304]

Love from India❤

[@mukhtarahmad3532]

*_Thank for the video I wanted this experiment_*

[@numismatric]

Very good, Icom must be shaking in their boots... ;)

[@grzondziele]

With a self-made coherer (aluminium foil scraps in a small paper tube) and a little bit longer wires I get distance about 1 m between transmitter and receiver. Without transistor.

[@lesics61Tiktok]

Thanks this video helped me

[@gullettr1]

Absolutely fabulous.

[@JackClayton123]

I think building such a simple transmitter and receiver helps students grasp the basic principles of radio transmission. Note however, it’s illegal to operate a spark gap transmitter of any power since 1934.

[@Iridium43]

Today the AM band is jammed with more noise sources than I can list here.

[@Niilo2.2]

I dont care who would even know if you build just a receiver

[@wjjf1180am]

Pretty Cool

[@rameshnahin1091]

Good Job 👍

[@SimonDevScr]

Is there a way to make the signal stronger without adding any other stuff? Thanks in advance!

[@JonathanSantamaria-777]

Great idea!

[@williamdejeffrio9701]

Cool idea!