⚠ God has said in the Quran: 🔵 { O mankind, worship your Lord, who created you and those before you, that you may become righteous - ( 2:21 ) 🔴 [He] who made for you the earth a bed [spread out] and the sky a ceiling and sent down from the sky, rain and brought forth thereby fruits as provision for you. So do not attribute to Allah equals while you know [that there is nothing similar to Him]. ( 2:22 ) 🔵 And if you are in doubt about what We have sent down upon Our Servant [Muhammad], then produce a surah the like thereof and call upon your witnesses other than Allah, if you should be truthful. ( 2:23 ) 🔴 But if you do not - and you will never be able to - then fear the Fire, whose fuel is men and stones, prepared for the disbelievers.( 2:24 ) 🔵 And give good tidings to those who believe and do righteous deeds that they will have gardens [in Paradise] beneath which rivers flow. Whenever they are provided with a provision of fruit therefrom, they will say, "This is what we were provided with before." And it is given to them in likeness. And they will have therein purified spouses, and they will abide therein eternally. ( 2:25 ) ⚠ Quran
@@Ontoshka1 it must be compatible with variable capacitor it is physical equation. Or find it from old radio. That is reason why aren't informations about ferit antena and variable capacitor
In 1957, in Los Angeles public school, we learned about the crystal radio and how to make one in Third Grade. That started my career in electronics as an Electronics Design Engineer.
That's amazing how a simple lesson in second grade sparked your career in electronics! It just goes to show the power of early education and how it can shape our future.
Way back in the mid 1960's I used a tiny am only "Transistor" radio. These were very cheap, used a single 9-volt battery. And had a single mono only ear bud. If you used the built-in speaker you killed the battery in just a few days. BUT if you just listen through that one little ear bud, the battery could last you over a month! Good times! Sleeping outdoors, under the stars! With my radio and an old pair of War Surplus binoculars. I'd sky watch all night long.
Pls clean the soldering iron tip every time when making new joint. And bend the ends of the componemts pins to make more contact surface, like in SMD part. This will significantly increase the quality.
Herthkit use to have one you put together.They gave you the plastic case resistors every thing.Me and my oldest son put one together and the learning experience alone on how to solder and tips towards learning?It was SO NEAT we put this little thing together and placed a batery in it and it worked a little AM radio.
Very nice video. Not all that silly explaining of every component, but focus on the process of building. What the components do can be found in so many videos. Thanks for this exceptional focus!
Radio waves have life! Radio waves have life! Machines are living too, working for me and you. From the transmitter to the receiver, across the ether, out of your speaker...
It's not a good idea to do this on a breadboard. While it's easier, breadboards create something called "parasitic capacitance" which messes up everything about this circuit. Because of that, you probably won't hear anything but noise if you build this on a breadboard. Try a veroboard (aka perfboard) which is easier than pcb but without the disadvantages of breadboard
The ferrite inductor actually used is certainly many times stronger than the little coil in the display image. With that little coil the tuning range would be perhaps in the vhf spectrum.
@@icarossavvides2641 This is somebody who somehow does not understand what I said. The display-image for the video does not match what is in the video. That air-core inductor definitely would not produce a resonance in the mediumwave range.
In 1957, I put a one-transistor AM circuit (not nearly so many parts) inside a little match box and used the radiators in the university as ground. Mine was perhaps not the first transistor radio, but I bet it was the smallest. LOL
@@TechniCraftYT - Simpler than that. It -- as I remember now 66 years later -- had a couple of capacitors & resistors, one transistor and a tunable coil. That was it.
Labelling the TA7642 as a JFET is completely misleading. That's an entire AM decoding circuit in a three terminal device, not a simple transistor. Also, good luck trying to find variable capacitors that are the right size these days. They are very hard to come across. To people watching this -- if you want to build an actual AM radio from a kit, I highly recommend the Elenco AM-550CK. You'll learn a lot more, and end up with a great AM radio for the AM broadcast band.
how's the sensitivity gonna be with such a small LC? how's the performance of the IC? the only transistor radio i was able to build was a regenerative one which utilized a feedback loop, was running a 2n2222a and a soviet KT315G with rather large coils.
cz-7642 není polem řízený tranzistor ale integrovaný obvod s 10 tranzistory a funguje pouze při 1.5V a maximální kmitočet okolo středních vln(cca2 Mhz) u nás se již středovlnné a dlouhovlnné vysílače vypnuly takže to mám pouze jako dekoraci.Nyní používám regenerativní tranzistory při 1.5V na VKV.
You might be surprised to hear a signal or two on it, if you connect it to a long wire antenna, and use a good ground. There is NO WAY that it will receive signals from any distance...if you use it, with just the antenna coil shown.
This project remember me when I was a boy and I built an am radio with my father using only 3 components, a germanium diode, a variable capacitor and a coil, as well as the antenna which was a simple wire. Audio in headphones, no battery...it was very funny!
Good video! But... ①TA7642 is an IC (integrated circuit). Please do not write TA7642 with symbols like FET. ②Because the method of writing 7 is unique, some people may mistake TA7642 for TA2642. ③Please tell them that resistors and capacitors have no polarity, so you don't need to worry about their direction.
😊 Gracias por la explicación, sobre el circuito impreso...creo, falto una antenita periscopio, reciclada, conectada para reducir, ruido de fondo y tener más ganancia de sintonia y / o un filtro
Ah sekarang sudah banyak studio radio yang berubah ke FM. Saya mohon video peragaan perakitan untuk yang radio FM! Dari pada saya ikuti video ini namun sudah tidak menemukan siaran di daerah kami, kan nanti sia sia. Apalagi jika hujan grak grek.
You are great human! Thank you for detailed s-b-s construction, you inspired me and I am sure many people who watched! Great job! Great author, thank you for educational and working practical video Sub ❤
If he was that good at electronics, he would still holes into the circuit board and fit the components properly and teach genuine construction methods!
Если ты называешь это хорошей пайкой, то ты реально ничего не знаешь. Человек многие ножки даже не прогрел. Так хлюпнул на нех припоя и типо держится. 1000% даю что если дотронуться к ним они отвалятся. При пайке ножка должна быть прогрета и припой должен быть со всех сторон.
Radio works fine, but there are interference sources in the area that make the radio stand out(work less well) They can use straw sources: TL lighting or switched-mode power supplies and telephone chargers
Can I increase the Vin? I'm using headphones and i can't hear anything, increasing voltage my earphones starts to make noise but i can't listen to any radio station. I was wondering if problem could be Vin
@@inventorkr1 I have earphones but sound is too low. I increased Vin and now sound is better but there is a lot of noise. I can hear something tho. I was wondering if the voltage increase was to blame for the noise...
Hello, sir. I have a question. What is the name of this profession? I want to learn it at all costs. Can anyone learn it? I mean, should you have an excellent achievement at school in order to learn it? Please reply early.❤
I'll risk this being a stupid question... I'm 65. Many years ago when I was about 9, I walked past a metal bin and heard music very low coming from the bin. Assuming that there was a radio in there which someone had thrown in, I pulled some newspapers apart, but there was nothing. Although the bin would have had some rather distasteful items in it, I searched as best I could, but there was nothing. Bear in mind that small transistor radios had been around a little while, but they were reasonable rare in England in 1967, and wouldn't have been thrown away! I found nothing...Is it possible that the metal bin was picking up radio waves - a radio station? It's always bothered me!
@@barryfoster453 I'm 70, with over 50 yrs of electronics experience, and I can tell you...that YES, it is possible that something was detecting a radio signal, which you were able to faintly hear. It would take just the right circumstances, for it to happen...but, it certainly is possible. Corrosion between metal surfaces can make a crude, but workable diode...and the hinges on the dumpster would qualify. Stranger things have happened. Rain gutters have been known to corrode, and detect...or even mix signals, resulting in interference. If in the vicinity of strong signals, a few rare people have picked up signals via their tooth fillings. Mind you, these are rare...but it is POSSIBLE, with just the right conditions.
@@darylp8564 THANK YOU SO MUCH. It was really odd, I told my parents when I got home, and I remember telling people in the following days. It only lasted less than a minute, and it was very low in volume, but was definitely pop music.
@@barryfoster453 You are very welcome. One thing I have learned over the span of my career, was to not off-handedly dismiss oddball symptoms or occurences...just because they didn't always "fit". When I read your comment, the first thing that popped into my mind, was an article I'd read...about a 2 million watt shortwave transmitter that Voice of America had installed, in a remote area. A local residents was alarmed and quite upset, by voices...when he was in bed. Turns out, with that kind of wattage in close proximity...his rusty bed springs were detecting the signal from VOA, and somehow getting them to vibrate, to where he heard voices. During World War 2, GIs made "Foxhole radios" that used old razor blades, as detectors. That worked because of some kind of protective coating on the blade acted as diode. Only certain blades worked, and if they were cleaned to bare metal, they stopped working. So, it wasn't hard to believe what you heard. 73, Daryl.
Короче это пример самого простого типа приемника, по сути состоящего из перестраиваемого LC колебательного контура и усилителя. При хорошей антенне вы можете послушать радио, но чувствительность у него плоховата, ну и диапазон частот определяется емкостью и индуктивностью. Как поделка для себя, очень прикольно)
Bonjour monsieur votre démonstration ma intéressé . Je voulais vous demander une question si vous êtes disponible pour me répondre est ce que c'est vous même qui à fabriquer le plaquette où bien vous avez acheté ?
radio AM amplifier 👇👇
th-cam.com/video/pMnwXL_bsCg/w-d-xo.html
⚠ God has said in the Quran:
🔵 { O mankind, worship your Lord, who created you and those before you, that you may become righteous - ( 2:21 )
🔴 [He] who made for you the earth a bed [spread out] and the sky a ceiling and sent down from the sky, rain and brought forth thereby fruits as provision for you. So do not attribute to Allah equals while you know [that there is nothing similar to Him]. ( 2:22 )
🔵 And if you are in doubt about what We have sent down upon Our Servant [Muhammad], then produce a surah the like thereof and call upon your witnesses other than Allah, if you should be truthful. ( 2:23 )
🔴 But if you do not - and you will never be able to - then fear the Fire, whose fuel is men and stones, prepared for the disbelievers.( 2:24 )
🔵 And give good tidings to those who believe and do righteous deeds that they will have gardens [in Paradise] beneath which rivers flow. Whenever they are provided with a provision of fruit therefrom, they will say, "This is what we were provided with before." And it is given to them in likeness. And they will have therein purified spouses, and they will abide therein eternally. ( 2:25 )
⚠ Quran
Tenes que estudiar electronica
How to wind the antenna, approximately how many turns?
@@Ontoshka1 it must be compatible with variable capacitor it is physical equation. Or find it from old radio.
That is reason why aren't informations about ferit antena and variable capacitor
In 1957, in Los Angeles public school, we learned about the crystal radio and how to make one in Third Grade.
That started my career in electronics as an Electronics Design Engineer.
That's amazing how a simple lesson in second grade sparked your career in electronics! It just goes to show the power of early education and how it can shape our future.
Yes it ruined my life too... :)
I was born in 2000, I never had anything like that in my schooling. Really wish I did.
so nice that you entered this beautiful world of electronics so early in School!
@@kaelandin luckily, you have youtube and the entire internet.
Great video. I am an old engineer from the 50's and I like that youth love radios. Cheers from Patagonia Argentina
Saludos de otro argentino, de la otra punta del continente!
@@XB10001 de Brasil 🇧🇷
@@diegocruz1136 👍
De Brasil 🇧🇷
Tengo 17 y escucho la radio,me encanta ya que tiene un no se que y es hermoso pasar una tarde escuchando radio.
As an 11 year old in 1969 I built a radio very similar to this and kicked off my career in electronics.
Wow! I learned two things from watching your video for only a minute. A new way to use SMT components.
thanks for your comment
😂
Way back in the mid 1960's I used a tiny am only "Transistor" radio. These were very cheap, used a single 9-volt battery. And had a single mono only ear bud.
If you used the built-in speaker you killed the battery in just a few days. BUT if you just listen through that one little ear bud, the battery could last you over a month!
Good times! Sleeping outdoors, under the stars! With my radio and an old pair of War Surplus binoculars. I'd sky watch all night long.
When will you decide to maintain your soldering iron? Usually, a damp sponge is more than enough.
I like your technique of just directly copying the schematic as traces and using through hole components as surface mount. Great for simple circuits.
Pls clean the soldering iron tip every time when making new joint. And bend the ends of the componemts pins to make more contact surface, like in SMD part.
This will significantly increase the quality.
Thanks for adding this tip
Agreed!
@@inventorkr1where can I get the Board you used in the Video ?
@HardLight77 it's useless lol
Herthkit use to have one you put together.They gave you the plastic case resistors every thing.Me and my oldest son put one together and the learning experience alone on how to solder and tips towards learning?It was SO NEAT we put this little thing together and placed a batery in it and it worked a little AM radio.
The world is a worse place without Heathkit.
Very nice video. Not all that silly explaining of every component, but focus on the process of building. What the components do can be found in so many videos. Thanks for this exceptional focus!
どこまで部品を減らせるのか試したことがありました。そのときはクリスタルイヤホンとバリアブルコンデンサ、ゲルマニウムダイオードまで減らすことができました。アンテナは家に配線してある電灯線をそのまま使いました。真似しないでください！！感電します！！
Excelente video. El punto crucial del circuito, es el capacitor variable y la numeración de sus pines. Ya casi, no los están fabricando.
Me and the boys listening to military frequencies with this one!!!! 🗣️🗣️🗣️🗣️🗣️🗣️🔥🔥🔥🔥🔥🔥
Where is the national
😂😂😂😂😈
Radio waves have life! Radio waves have life! Machines are living too, working for me and you. From the transmitter to the receiver, across the ether, out of your speaker...
Our God of the Bible who created everything, put life in everything. Atoms themselves have life.
God bless you ☦️ ❤
Muy buen video, yo una ves hice una radio así y funcionó exelente...tu vídeo está muy bien explicado...saludos!!
You made it very easy to follow what needed to be done by referring to the index card.
I took "Electricity" in high school,,only thing i remember is a buddy putting a capacitor in the wall outlet and saying Run!!
这个视频带给大家的只是怀念，尤其是年纪大的无线电爱好者
I remember years ago we had to build a crystal radio for a merit badge in Boy Scouts.. Pretty neat stuff back in the day.
Crystal radios for Boy Scouts? Talk about old-school tech training! Bet you could pick up some interesting signals with those.
I have seen so many people making boards, but this is the best. I wish you could do the project on a breadboard. Thanks a lot. Nice video
It's not a good idea to do this on a breadboard. While it's easier, breadboards create something called "parasitic capacitance" which messes up everything about this circuit. Because of that, you probably won't hear anything but noise if you build this on a breadboard. Try a veroboard (aka perfboard) which is easier than pcb but without the disadvantages of breadboard
This must be everyone's first electonics project.
How I miss when Inhad time for this! 😪
I hope you really enjoyed watching the video
Lets do it this time
@@inventorkr1 very much!
I remember building one of those crystal sets back in the 60's.
Coolest thing at the time.😁
Literally extracting sound from thin air with no power source? Definitely still cool!
The ferrite inductor actually used is certainly many times stronger than the little coil in the display image. With that little coil the tuning range would be perhaps in the vhf spectrum.
Wrong. What do you mean "display image" if you care to look at the data sheet, the ferrite aerial concurs with the datasheet guidance.
@@icarossavvides2641 This is somebody who somehow does not understand what I said.
The display-image for the video does not match what is in the video. That air-core inductor definitely would not produce a resonance in the mediumwave range.
💯
I built this but the only thing I heard was the load snoring of my neighbor.
Значит был неучем в школе и спаял все по женскому половому органу🤷♂️
Precisely. I ordered 10 pcs of TA7642 from Ali Express and they came out to be all fake.
😂
LOL 🤣😂
dang u reserveed a sleep monitor 😂❤
Ха,ха,ха я в детстве 45 лет назад такие конструкции паял. Но тогда в эфире было очень много радиостанций
In 1957, I put a one-transistor AM circuit (not nearly so many parts) inside a little match box and used the radiators in the university as ground. Mine was perhaps not the first transistor radio, but I bet it was the smallest. LOL
Was it an regen receiver
@@TechniCraftYT - Simpler than that. It -- as I remember now 66 years later -- had a couple of capacitors & resistors, one transistor and a tunable coil. That was it.
@@fredrichenning1367 so you just had an crystal radio with an transistor amp.
Labelling the TA7642 as a JFET is completely misleading. That's an entire AM decoding circuit in a three terminal device, not a simple transistor. Also, good luck trying to find variable capacitors that are the right size these days. They are very hard to come across.
To people watching this -- if you want to build an actual AM radio from a kit, I highly recommend the Elenco AM-550CK. You'll learn a lot more, and end up with a great AM radio for the AM broadcast band.
Although the symbol might not be perfect, to be fair he did label the part @ 4:00.
Also, the AM band isn't always the same everywhere so I am assuming the tuning is designed for the frequencies he wanted to receive.
@@jimharris9394 That has nothing to do with what I said
I love radios , thank you very much.
how's the sensitivity gonna be with such a small LC? how's the performance of the IC? the only transistor radio i was able to build was a regenerative one which utilized a feedback loop, was running a 2n2222a and a soviet KT315G with rather large coils.
cz-7642 není polem řízený tranzistor ale integrovaný obvod s 10 tranzistory a funguje pouze při 1.5V a maximální kmitočet okolo středních vln(cca2 Mhz) u nás se již středovlnné a dlouhovlnné vysílače vypnuly takže to mám pouze jako dekoraci.Nyní používám regenerativní tranzistory při 1.5V na VKV.
You might be surprised to hear a signal or two on it, if you connect it to a long wire antenna, and use a good ground. There is NO WAY that it will receive signals from any distance...if you use it, with just the antenna coil shown.
Great🙂 Very simple. Thanks
This project remember me when I was a boy and I built an am radio with my father using only 3 components, a germanium diode, a variable capacitor and a coil, as well as the antenna which was a simple wire.
Audio in headphones, no battery...it was very funny!
That radio can help me in Silent Hill, thanks!
Jokes besides, great job!
Lots of comments praising this post, but how many people have built this radio? And how well did it work?
A better video would explain the function of each component as it applies to the AM radio
He knows nothing
Он не понимает вообще он 0
Excellent video! 👍
Meu sonho é um ferro de solda mágico, desses dos vídeos do TH-cam, que soldam componentes em um segundo!
O meu tbm 😅
That's called experience!!!!
Com experiência e uma estação de solda nums 350 graus você consegue 👍
Sofri igual um condenado aprendendo sozinho até descobrir a pasta de solda. N conseguia nem soldar um fio no alto falante kkkkk
Thanks from India
Good video! But...
①TA7642 is an IC (integrated circuit). Please do not write TA7642 with symbols like FET.
②Because the method of writing 7 is unique, some people may mistake TA7642 for TA2642.
③Please tell them that resistors and capacitors have no polarity, so you don't need to worry about their direction.
Thanks for your comment, I appreciate your advice
Bons tempos, montei muitos rádios, inclusive FM! Época bacana, década de 80/90.
😊 Gracias por la explicación, sobre el circuito impreso...creo, falto una antenita periscopio, reciclada, conectada para reducir, ruido de fondo y tener más ganancia de sintonia y / o un filtro
Ah sekarang sudah banyak studio radio yang berubah ke FM. Saya mohon video peragaan perakitan untuk yang radio FM! Dari pada saya ikuti video ini namun sudah tidak menemukan siaran di daerah kami, kan nanti sia sia. Apalagi jika hujan grak grek.
In Romania these kind of radios were made in diy, and at the countryside were popular...with a big antena, foreign broadcast receive was possible.
You are great human! Thank you for detailed s-b-s construction, you inspired me and I am sure many people who watched! Great job! Great author, thank you for educational and working practical video
Sub ❤
thank you
I've built these kind of radio during my younger days but I need a long wire antenna to receive some signals ..
I selute whole sciencetist who Invented all doscover for us humanity
In the O days, I use ZN414 IC to build a 1.5V cell portable AM radio. Even before the invention of SONY Walkman.
Indeed, ZN414 chip, I made an AM radio in a match box with ZN414. I used a 1.5V button cell.
Great video! want to ask where we know the path of the pcb that we will make, then the components needed to become an AM radio circuit?
Hello good friend, you have a good idea. you are very good at electronics, your video is very good, thank you for sharing ❤❤❤
If he was that good at electronics, he would still holes into the circuit board and fit the components properly and teach genuine construction methods!
Всё бы хорошо на А М сейчас не работает только фм , жалко диапазон 😥
Parabéns ficou muito legal, infelizmente a transmissão AM sofre muito interferência. Nesse seu projeto é possível adaptar uma antena?
A receção de rádio a meio da noite é clara
@@inventorkr1 É verdade a meia noite a recepção de rádio é mais fácil de capturar as estações.
Паяю и ремонтирую с 60х. Но ваше видео, супер
Ещё одного выпустили из дома вечного двигателя.
Если ты называешь это хорошей пайкой, то ты реально ничего не знаешь. Человек многие ножки даже не прогрел. Так хлюпнул на нех припоя и типо держится. 1000% даю что если дотронуться к ним они отвалятся. При пайке ножка должна быть прогрета и припой должен быть со всех сторон.
@@sergbo3114паять без флюса - зверство над выводами радиодеталей...
Make sure you have a proper antenna outside, some are 100 feet long. Good luck getting any overseas radio stations.
That is a TRF integrated circuit that looks like a transitor.
That looks like a high quality Radio Shack radio.
Qreat video. One may-be stupid question: In the video you use LC circut of 433uH and 160pF. This set up will resonate with 19KHz signal. Correct?
No, putting the values into an LC tank calculator gives roughly 604KHz which is towards the bottom of the MW band
Nice well done
I built my first radio in 1975. It was just coil, capacitor, diode, VERY long antenna and headphones.
I bet most of that noise was maybe digital transmissions of some kind? Kind of like how computer modems talked to the internet. Really cool!
Zbytečně složitá konstrukce.
😂 great 😃👍😂
Nice sharing ❤❤
OMG. When I first looked at this, I thought that it was made from a mousetrap! Nice little project for someone.
Hi, good job, I hope you are well, I wanted to know if the circuit can be used with a voltage higher than 1.5v
Thanks!
3V
Interesting. Nice project.
Why is there a capacitor t the output to ground.why is it connected to collector?
Podrías hacer una explicación del circuito, como funciona, por qué de los valores de los componentes, etc.
How to determine frequency or incorporate adjustment to build other receivers in other Hertz ranges?
Change the value of the variable capacitor and the value of the coil
This was pretty cool!
70年前、ゲルマニュームラジオが流行りました・・思い出す
En los radios AM la recepción se mejora moviendo la horientación de la bobina. Excelente buen proyecto.
Radio works fine, but there are interference sources in the area that make the radio stand out(work less well)
They can use straw sources: TL lighting or switched-mode power supplies and telephone chargers
Que bueno 😮 saludos desde Bolivia
Очень поучительно... Спасибо.. Ребятишкам очень интересно будет... ❤❤
Сейчас ребятишкам конабис интересен и его производные.
@@ВасилийТеплов-л7е а ты по себе не сравнивай
Nice video ❤
Can I increase the Vin? I'm using headphones and i can't hear anything, increasing voltage my earphones starts to make noise but i can't listen to any radio station. I was wondering if problem could be Vin
You need headphones with high impedance
@@inventorkr1 I have earphones but sound is too low. I increased Vin and now sound is better but there is a lot of noise. I can hear something tho. I was wondering if the voltage increase was to blame for the noise...
awesome.😊
Awesome you just reminded me i have to go get some peroxide
Hello, sir. I have a question. What is the name of this profession? I want to learn it at all costs. Can anyone learn it? I mean, should you have an excellent achievement at school in order to learn it? Please reply early.❤
By the way, I learned the radio industry in school in theory. It is even called the RCL circuit, I think
I like these PCBs that don't have holes. So much easier and quicker to make!
Yeah, only problem is they look like an unprofessional POS. Also, look how dirty his soldering tip is. Clearly has no idea what he's doing.
Much more fragile, too.
Na aminha juventude montei muitos pequenos transmissores de Fm, até hoje me lembro do transistor BF254 😅
Had one made with galena but those generally were stolen apparently. If you have one, donate it to the local museum
😊 Where do I get a variable capacitor like that? Not in description or on Amazon.
From Ali Express
gozbx.com/r/Be82f6Sg4UOR
I'll risk this being a stupid question...
I'm 65. Many years ago when I was about 9, I walked past a metal bin and heard music very low coming from the bin. Assuming that there was a radio in there which someone had thrown in, I pulled some newspapers apart, but there was nothing. Although the bin would have had some rather distasteful items in it, I searched as best I could, but there was nothing. Bear in mind that small transistor radios had been around a little while, but they were reasonable rare in England in 1967, and wouldn't have been thrown away! I found nothing...Is it possible that the metal bin was picking up radio waves - a radio station? It's always bothered me!
No. That's absolutely not possible. It's either a false memory or the sound was coming from somewhere else and your ears were playing tricks on you.
@@AureliusR
Ok, thanks. I still go with the idea that there was a radio in that bin.
@@barryfoster453 I'm 70, with over 50 yrs of electronics experience, and I can tell you...that YES, it is possible that something was detecting a radio signal, which you were able to faintly hear. It would take just the right circumstances, for it to happen...but, it certainly is possible. Corrosion between metal surfaces can make a crude, but workable diode...and the hinges on the dumpster would qualify. Stranger things have happened. Rain gutters have been known to corrode, and detect...or even mix signals, resulting in interference. If in the vicinity of strong signals, a few rare people have picked up signals via their tooth fillings. Mind you, these are rare...but it is POSSIBLE, with just the right conditions.
@@darylp8564
THANK YOU SO MUCH. It was really odd, I told my parents when I got home, and I remember telling people in the following days. It only lasted less than a minute, and it was very low in volume, but was definitely pop music.
@@barryfoster453 You are very welcome. One thing I have learned over the span of my career, was to not off-handedly dismiss oddball symptoms or occurences...just because they didn't always "fit". When I read your comment, the first thing that popped into my mind, was an article I'd read...about a 2 million watt shortwave transmitter that Voice of America had installed, in a remote area. A local residents was alarmed and quite upset, by voices...when he was in bed. Turns out, with that kind of wattage in close proximity...his rusty bed springs were detecting the signal from VOA, and somehow getting them to vibrate, to where he heard voices. During World War 2, GIs made "Foxhole radios" that used old razor blades, as detectors. That worked because of some kind of protective coating on the blade acted as diode. Only certain blades worked, and if they were cleaned to bare metal, they stopped working. So, it wasn't hard to believe what you heard. 73, Daryl.
Apakah masih ada pemancar radio AM , sebab dikotaku semua radio memancarkan dg frekwensi FM .
Ya, masih ada stasiun yang mengudara di gelombang AM
Awesome 😎
Thanni nindidum flatt valve. anakuruth eppadi annasee...
Very nice👍👍👍
Короче это пример самого простого типа приемника, по сути состоящего из перестраиваемого LC колебательного контура и усилителя. При хорошей антенне вы можете послушать радио, но чувствительность у него плоховата, ну и диапазон частот определяется емкостью и индуктивностью. Как поделка для себя, очень прикольно)
Could we do this without batteries?
Dulu waktu sekolah praktek sendiri .hasil nya bagus ..jadi teringat
Bonjour monsieur votre démonstration ma intéressé . Je voulais vous demander une question si vous êtes disponible pour me répondre est ce que c'est vous même qui à fabriquer le plaquette où bien vous avez acheté ?
Je ne comprends pas exactement ce que tu veux dire, peux-tu expliquer ?
That is a TRF integrated circuit that looks like a transitor.
Me gusto el video hacer uno mismo un radio
YOU ARE SO SO SO NICE.
Your comment is important to me, thanks
I guess the speaker on the right is an amplified speaker with it's own power source. ?
Yes
Nice bro 🎉
Should have bent the ends on the components your soldering to the board at 90 degrees for better solder joint.
Next: make one without a power source
You can omit the power source from this one. It's useless anyway 😂
ich begann auch mit detektoren. Funktioniert leider nur für AM und schon gar nicht für DAB
I have problem designing the ferrite core with those threads. What is the name of the thread and how can I get one ?
Use copper wire
@@inventorkr1
Thank you bro
How many turns and the wire size ?
@@AugustineAriola 22 gauge wire, and about 70 turns.
Better to use Litz wire if you can.
@@AureliusR
Really ? Can I get that ?
Very cute