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
3 жыл бұрын
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
3 жыл бұрын
Yeah its sad that today we lack this things
@OnE61811301
3 жыл бұрын
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?
@rdrgtreer
3 жыл бұрын
That's what happens when the military complex & tax cuts tanks the entire public sector
@w8lvradio
3 жыл бұрын
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
@kunasagaran5933
3 жыл бұрын
More of these simple experiments or projects are required to create an interest in young kids. You have done an excellent job. Thanks.
@TrangertoR
3 жыл бұрын
really man?! It is 21 century man. Maybe nobody told you but we know how earth become created.... It is not God...
@alansturgess1324
3 жыл бұрын
@@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
3 жыл бұрын
Yess im 12 and im realy interested and im think im pretty good at this
@kunasagaran5933
3 жыл бұрын
@@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
3 жыл бұрын
Sadly "apps" have been replacing an interest in actually learning something.
@Dan-gk7ti
7 ай бұрын
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)
@eventhisidistaken
3 жыл бұрын
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
Жыл бұрын
amazing! do you remember how you made those crystal radios to be so small?
@eventhisidistaken
Жыл бұрын
@@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
9 ай бұрын
I’m still a kid and I love engendering
@gabrielsantos19
3 жыл бұрын
Looked for this a time ago, but didn't found. Now, KZitem recommended me this video. Better late than never :). Thank you.
@MuratIsikHome
2 жыл бұрын
I will use it to help my son's physics assignment. Thanks very much from Istanbul.
@DavidALovingMPF102
3 жыл бұрын
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
Жыл бұрын
what kind of transmitter is used in anti aircraft radars?
@DavidALovingMPF102
Жыл бұрын
@@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
Жыл бұрын
@@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
Жыл бұрын
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.
@OldGrayCzechWolf
7 ай бұрын
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
6 ай бұрын
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
6 ай бұрын
@@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
6 ай бұрын
@@OldGrayCzechWolfI notice that knowing three languages have not prevented you from being a jack ass.
@charliebrownn6622
4 ай бұрын
@@OldGrayCzechWolfslow down turbo… it’s a KZitem comment, not a tesis bato, pls seat, relax and learn some Spanglish too 😎
@markkinsler4333
4 ай бұрын
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.
@jerryfacts9749
3 ай бұрын
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.
@patricktinkham
3 жыл бұрын
I love this re-creation of the Hertz experiment! Well done!!
@MT-in3tp
3 жыл бұрын
The simple amplification circuit was very interesting, you have re-invented hertz radio :-) большой молодец
@johnwest7993
Жыл бұрын
I like it. A modern day version of the experiments conducted by Hertz proving the existence of radio waves.
@gigmach
3 жыл бұрын
Best example of an amplifier I've seen on KZitem ever. Well done
@peteshugar7220
2 жыл бұрын
but it is not an amplifier, it is a switch. comm 2nd class 50 + yrs
@rouxenophobe
11 ай бұрын
@@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?
@daemonwhitebeard6590
3 жыл бұрын
Just like a Coherer Receiver minus the Coherer Switch. It is also like a tiny Spark Gap Transmitter. Cool video.
@amfa7
3 жыл бұрын
Very informative. Spasibo Thank you
@verenagruber1890
3 жыл бұрын
Grandios! Thanks a lot Kisses from Bern, Switzerland
@familyfungi
3 жыл бұрын
Perfect project for homeschooling. Thank you very much!
@w8lvradio
3 жыл бұрын
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
3 жыл бұрын
Hi my friend William :) how are you :)
@w8lvradio
3 жыл бұрын
@@34leaderzal9incacucic5 Quite well, Thanks! Registered Nurse in the Covid Fight here, when I'm not working the Radio.
@34leaderzal9incacucic5
3 жыл бұрын
@@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
@imdadali4292
3 жыл бұрын
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.
@isabelleg.4294
2 жыл бұрын
Great to know as we might need this soon for survival!
@justingreen8006
3 жыл бұрын
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
9 ай бұрын
Duh! Ppl click on this to make a radio to listen with? Mabee because the thumbnail says "radio"? Not LED twinkle thing.
@vmcv3284
4 ай бұрын
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..
@lukebailey6647
Жыл бұрын
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 👌
@MatthiasLenardt
2 жыл бұрын
Very simple but effective experiment
@lacourarieeric7650
3 жыл бұрын
vidéo très pédagogique et instructive la simplicité a l'état pure
@cliveevrall1071
3 жыл бұрын
Very interesting. Thank you.
@michaelschmidt7014
7 ай бұрын
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.
@dalebenton3354
6 ай бұрын
done that before,Remember doing this when I was still back at School in woodwork and technology
@AaronSchwarz42
3 жыл бұрын
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
3 жыл бұрын
This is why I disliked it at first, but the content is so good that it deserved a like
@peteshugar7220
2 жыл бұрын
but for those of who are hard of hearing, it is crap, it is just too hard to understand!!
@CanadianSmoke
8 ай бұрын
Excellent video... I remember hands on science in science class when I was younger.
@fredsalter1915
3 жыл бұрын
Fantastic video! Very motivating!
@gordonwelcher9598
3 жыл бұрын
Use a CK-722 transistor. The emitter to base voltage is lower. You will have to reverse the battery as it is PNP.
@Iridium43
3 жыл бұрын
Yes Raytheon ck722 transistors. Barely working transistors sold for toys. Look up ck722 on KZitem.
@Berghiker
3 жыл бұрын
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.
3 жыл бұрын
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
3 жыл бұрын
@@antonio-c.o. As far as I remember, I used an ignition coil.
@greenaum
3 жыл бұрын
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.
3 жыл бұрын
@@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
3 жыл бұрын
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.
@starbravo672
3 жыл бұрын
Great discovery....! Great idea...! Thank you for the video...!
@stephenbrinckerhoff3510
3 жыл бұрын
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
2 жыл бұрын
I am looking for a WWII version also.
@themartianway
2 жыл бұрын
Fox hole radio.
@hokep61
Жыл бұрын
@@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
8 ай бұрын
Eggshell? I thought lump of coal.
@Jemacaza
4 ай бұрын
Great experiment, also to spark children’s interest for physics
@Estabanwatersaz
3 жыл бұрын
Greatest video. Thanks 🙏🏼
@anilshirsat4406
9 ай бұрын
Very well demonstrated the concept of radio waves 👌👍
@d3ja527
3 жыл бұрын
Awesome video😁 Respect from Serbia
@גילקיפניס
3 жыл бұрын
A very good idea. Thank you
@jimparr01Utube
3 жыл бұрын
Ah-ha! Back to the original spark-gap transmitter - almost... Nice and useful clip Sir.
@SimonDevScr
3 ай бұрын
Is there a way to make the signal stronger without adding any other stuff? Thanks in advance!
@lesics61Tiktok
2 жыл бұрын
Thanks this video helped me
@emoryschley5546
3 жыл бұрын
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
3 жыл бұрын
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
3 жыл бұрын
Autist hearing cannot separate the sounds and moreover all the sounds reverb in their head like hyper amplified and same intensity
@daisuki9296
3 жыл бұрын
You're a very old man I think
@CircuitCreator
Жыл бұрын
The way this video highlights the innovative features of this device is truly impressive.❤
@ToddHofer
3 жыл бұрын
Classic Spark Gap transmitter. Nice job!
@lorisvila8008
2 жыл бұрын
It also helped me understanding how an antenna works !
@dhineshd94
3 жыл бұрын
Nice video😁
@YuniorPradesMedina
6 ай бұрын
The most simple thing that made human live more confortable.a man made things.amazing AMAZING the simpliicity of this Discovery
@philgiglio7922
3 жыл бұрын
Spaek gap transmitter...slick.
@pat3034
2 жыл бұрын
Awesome ... a mini Spark Gap transmitter!
@EikottXD
3 жыл бұрын
This is awesome also loving the new dubbing, or at least new to me haven't been here in a while.
@LTV_inc
4 ай бұрын
Excellent work! 😊
@marekcm1882
3 жыл бұрын
amazing and so simple.
@nicholasorro1105
2 жыл бұрын
this is a wonderful and perfect video. thanks a lot for sharing it. Am Nick from Kenya
@justacook6858
2 жыл бұрын
Did in joy and respect the skill.
@ryan200978
3 ай бұрын
' Wow! Simply explained concept practically .. 🙂
@Angelinuh2015
2 жыл бұрын
Thanks im going to have my kids work on this with me.
@stephanwerick5495
Жыл бұрын
Great demonstration
@ruismodok8860
8 ай бұрын
Thank you so much of your content and your information. Now i'm understand about transmiter and receiver 😊
@WJCTechyman
Жыл бұрын
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.
@Peter-rz9ub
2 жыл бұрын
GREAT JOB. THX TO SHOW US THIS. HAPPY NEW YEAR TO EVERYONE...
@neilfurby555
8 ай бұрын
Excellent….well explained and easy to follow.
@satyamtiwari9816
2 жыл бұрын
good to see it works actually i to have tried it.. thanks man
@gerryroberts662
Жыл бұрын
unfortuneatley this is something that i can understand, My knowlege is novice.. This seems easy...
@theeronterranova7928
3 жыл бұрын
This was good video
@pierpa_76pierpaolo
Жыл бұрын
Interesting but I am interested in operation to cover a significant distance of at least 10 meters.
@smartlearn9028
3 жыл бұрын
Amazing..Ecallent...Great...As an electronic hobbiest and teacher i understand the great thought behind the demonstration... Thank you sir
@delljopshorseracingtips4693
3 жыл бұрын
Made it fantastic love it sound is best I have ever heard love it
@shundhem_electrick
2 жыл бұрын
Amazing video
@tinkerwithstuff
3 жыл бұрын
Heinrich Hertz setup 2021 version - with LED! :)
@petersmith5199
2 жыл бұрын
Excellent. Thank you!
@ed9763
3 жыл бұрын
Well done. Very useful expt. to illustrate radio transmission to school kids.
@jfrphoto01
3 жыл бұрын
Also, outlawed by local laws (in USA: FCC) and international law!
@VishnuSharma-ig7un
3 жыл бұрын
Nice ....Good project ....
@regor2102
6 ай бұрын
Lol, a spark gap generator. Nice!
@-Gunnarsson-
Ай бұрын
speaking of radio. Iv noticed my TV cable was able to pick up signal without being plugged in. Kinda funny 😂
@gullettr1
3 жыл бұрын
Absolutely fabulous.
@champ3027
2 жыл бұрын
Hi sir, just wanna ask what are the materials needed in this project?
@incognito0304
8 ай бұрын
Love from India❤
@alaminyusuf3239
Жыл бұрын
Beutiful demonstration
@ducomaritiem7160
6 ай бұрын
Hey, that's nice, thnx, I'll let my students make that!
@grzondziele
8 ай бұрын
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.
@brandonlaragirl
Жыл бұрын
Awesome, thanks for sharing!
@jonkent928
3 жыл бұрын
Thats so damn cool. Have to try this with my son
@RalphFreeman-ok5of
4 ай бұрын
Spark Gap Transmitters emit broad band EMC noise and so contravene many regulations. Wouldn''t recommend their use ?
@user-decade4v
9 ай бұрын
Nicely done 👍
@mikechappell4156
3 ай бұрын
Nice video. I wasn't aware that some lighters were piezo-electric. Audio could use some work though.
@numismatric
7 ай бұрын
Very good, Icom must be shaking in their boots... ;)
@pby1000
3 жыл бұрын
Very cool. I think I will try it.
@rolandmousaa3110
2 жыл бұрын
Thanks for the Ed..
@MikaelOlssonUppsala
3 жыл бұрын
A beautiful way of explaining how a transistor works
@darrenhumphris7522
3 жыл бұрын
Great project easy and simple
@moosesnWoop
3 жыл бұрын
Liked for the English dub. For some reason, this feels more natural.
@MrFreddiew1
3 жыл бұрын
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.
@dimitarhristov8704
7 ай бұрын
Very nice and practical video ! Thx !
@damocsell
3 жыл бұрын
Great job thank you I learned something.
@JonathanSantamaria-777
10 ай бұрын
Great idea!
@jeffreykpan3544
2 жыл бұрын
Genius experiment
@doseboos
10 ай бұрын
More of these simple experiments or projects please
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