Let's make a radio transmitter PART 1

[@bios546]

At times when I feel bummed out, your channel always finds itself amidst my few sources of impending excitement. Well, other times, it's the cherry on top of my happiness cake! Your channel stays true to its name as learning stuff ain't sabotaged by bombardment of the unknown and the complicated, while being remarkable, enjoyable, and memorable! You're an electronics artist :) I'm literally pumped up for this series! Also, as a suggestion, please include satcomms, it's complications, maybe the link budget, antenna deployment methods, how to make your own space qualified transceiver or how to zero down/ hone in on a radio transceiver.

[@learnelectronics]

Thanks

[@michaelpadovani9566]

Def enjoyed watching this, there is something cool and mysterious about radio but you really show how simple it can be done.

[@learnelectronics]

Thanks Mike

[@NGinuity]

I know this is a little more than transmitter "basics", but with the continuous wave, if you have a beat frequency oscillator on the receiver with a mixer, one of the frequencies from the mixer result should be in the audio spectrum. You could still use the transmitter with no audio modulation on the carrier couldn't you? I think this is how we do it on the ham bands, but I don't CW, so I'm sketchy on the specifics. I do know they are used to reconstruct SSB's since half the carrier is suppressed. Playing with the uBITX and there's a blatant row of crystals for the BFO in that design.

[@Al-zv9br]

FYI- Marconi made his first transatlantic radio transmission on Cape Cod, Massachusetts to England if I have my facts right! Please correct me if I am wrong! Thanks

[@BretttMaverick]

It was from Cornwall, England to Signal Hill over St. John's, Newfoundland.

[@pulesjet]

The first Spark Gap Radio's had no Tank Circuit. Created RAW Broad Band RF. The ability to select the signal frequency via Tank Circuit was a drastic improvement to come latter. Today Spark Gap can be used to create Broad Band Signals for Radio Jamming purposes.

[@acestudioscouk-Ace-G0ACE]

Very interesting! I'll have to see if you have done any more on building simple transmitters, I hope you have!

[@kanhaiyaupreti6702]

I have visited to Chandra Home here in India. It's true he carried out Radio transmission but didn't patented his design. I am electronics and communication student btw.

[@AlexBurtonMusic]

If we connect the crystal oscillator to the vacuum tube, will this provide efficient RF amplification?

[@foxpup]

I love that super-simple, yet relevant, few second long intro. Like the sound of a tuna can being opened to a house-cat. Some sounds/experiences cause a special response/feeling....a great way to start a video. :-)

[@learnelectronics]

Thank you.

[@joselocosasrandom1971]

FM or AM

[@mikeoliver3254]

Wow you made that easy to understand, thanks Paul this was a fantastic video. I had been struggling with try to understand radio circuits for a while now and you just cleared up a ton of confusion on my part.

[@learnelectronics]

I hope you like part 2 then...

[@draganmiletich3013]

Tesla won at court and was awarded the rights to the radio patent. Marconi just had more money, went to higher court and took the radio away from Tesla (who did not even contest). You didn't mention this because your knowledge is a school knowledge, Tesla does not exist in American schools.

[@paulramasco6769]

That's not quite true. Tesla lost in court originally. The U.S patent office didn't award the patent to Tesla until months after his death because Marconi's company was trying to sue over other patents. www.pbs.org/tesla/ll/ll_whoradio.html

[@ianbertenshaw4350]

PoorTesla , that man just couldn’t win ! He copped it from Edison with the AC. Vs DC war and Marconi stole his ideas .

[@keepsecret7624]

@@ianbertenshaw4350 Marconi did not steal his ideas - Marconi was using an electrical arcing system to generate his transmission. I'll need to look further in Telsa.

[@ianbertenshaw4350]

Keep Secret If i recall correctly Marconi wouldn’t let anyone look inside his little box of tricks but when they finally did get to see inside they found parts that were identical to ones that Tesla had designed before Marconi even thought about building a Radio.

[@bblod4896]

You can use the 10 Mhz crystal for a time standard. Make a TCXO with an oven using an arduino as a feedback device to adjust the frequency to exactly 10 Mhz.

[@WatchesTrainsAndRockets]

What, no water cooled vacuum tubes? Thanks as always for the great, simple to understand videos.

[@johnsmith-lb4mo]

A very interesting and informative video, can i mess with this circuit without a license since it is so low power?

[@Bill_N7FTM]

Everybody's harping on who invented radio but didn't comment on FCC standards for Federal Communications Commission and that the 22.xx MHZ oscillator is NOT in the 10 meter band! 10 meters is from 28.000 to 29.9 something MHZ.

[@opalprestonshirley1700]

A good beginning. Fun project.

[@JPEE2009]

So if we were making a OOK (On-Off-Keying) transmitter we wouldn't even need to modulate it, correct?

[@learnelectronics]

Yep

[@johnzorella4700]

I want to order crystal oscillators the type that you are using with the leads, for 108 megahertz 88 megahertz, how do I specify body type? Who do you order from? What about ajustable oscillators? Thanks for you time! Love your videos learning a lot going to donate in the near future!

[@MalagasOnFire]

The elementary radio principle into pratical example. Scope was picking quite good the signal :D Thanks for sharing since never got into radio stuff.

[@learnelectronics]

Thanks.

[@keithking1985]

In part two could you show us the difference between a resonance Arial and a bad one!!

[@Борис-е7ч]

Thanks for a nice video! Please don't forget Aleksandr Popov (Александр Степанович Попов). He was experimenting with radio transmissions in the same time period as Guglielmo Marconi.

[@odissey2]

A. Popov was also credited with first observation of a radar phenomenon

[@stewartrv]

Nice one. You could hook up a RTL-SDR dongle or use your Ham radio to receive this I suppose even if very very weak I guess it would detect it in the same room right? Might want to build a little Colpitts oscillator or similar VFO next. Another nice project is to get a cheap Pixie radio - its a few dollars and an easy build.

[@obscuraprintdesign4947]

It's strange that you left out Nicola Tesla from your list of people who had worked on radio technology considering that he was actually the one who ultimately created radio transmission, marconi was just given the credit for it because he made the first trans-atlantic radio boadcast which made use of many of Tesla patents to make it work

[@marktiger4613]

That was great I like the radio stuff and the electronics bread board more than the Arduino stuff but it's all good and don't stop doing it thumbs up everyone

[@joscelkentmanzanero1990]

As an electronics engineering student, I thank you for this.

[@keithking1985]

So is the signal connected to one of the coils on the transformer and the osillater on the other?? How is the signal.... I don't know how to say this.. how is it attached to the carrier signal?? Am I making sense.. ?

[@learnelectronics]

The amplitude (voltage) if the carrier is modulated (changed) by the input signal. The frequency remains the same but the voltage changes.

[@bblod4896]

A nice tuned circuit should clean up that square/sine wave a bit.

[@grahambambrook313]

I noticed when you plugged in the transformer the basic, un-modulated signal looked a lot cleaner on the 'scope. Is this due to some choking effect or is my thinking amiss? Bear in mind, I am a mechanical engineer, not electrical.

[@Helmut314]

Looking forward to part 2.

[@theengineer9910]

" The FCC wont let me be "

[@zezeA380]

Why do u use a transformer for the audio input? I don't understand

[@learnelectronics]

It is to match impedance

[@AdamStrong09]

Looking forward to hearing it on a radio

[@learnelectronics]

Part 2...coming soon. Like as soon as I get a new crystal....

[@gartmorn]

Great explanation Paul. Perhaps a future video with a microphone in circuit with a bit of filtering etc would be a good idea. Theory is good but practical demonstrations are the meat on the bone!

[@georgechambers3197]

I promise not to break any local laws with a homemade radio. 😁 Thanks for the new adventure series!

[@learnelectronics]

Keep your antenna under a foot and CCC under 9v and it should only output enough power to go around the room.

[@daveodessa]

Wasn't Herz the first to prove EM waves?

[@pulesjet]

Easiest way would be to run your Audio and Carrier thru a non linear device Heterodyning your signal. Diodes and Transistors are commonly used Non Linear devices used today. Marconi and Company didn't have access to those at the time, eaaa? LOL

[@styrenereplicas53]

Great video. I’m looking forward to part 2.

[@learnelectronics]

Thursday

[@benherantony4524]

Realy Great....

[@jj74qformerlyjailbreak3]

I love that SEGP “ Scanning Electron Graphing Paper, I hate the smell of it being made though. Paper plants smell like Sulphuric Eggs And Politicians

[@bblod4896]

Commission...Federal Communications Commission. Thanks Paul, great lecture.

[@learnelectronics]

Comission....lol the older I get the less I something...

[@paulramasco6769]

Very awesome video. Glad you left in where you made a mistake. It happens and shows real world issues that crop up.

[@flemmingchristiansen2462]

Carry(er) on! Great stuff. It's great that you have the history leading to this. This could easily be 20+ part series :) The beginning of a DIY Ham radio, great start. Love your little mistake, it's just a zero -lol.

[@learnelectronics]

Thank you. Im working on Part2 now....

[@ae1tpa92gwtom2]

Hi Paul, thx for the video, I hope Part 2 uses a transistor and the freq is lowered for reception by readily available receivers. By using the transistor, this will clearly show how amplification works,..this could easily end up multi part videos... looking forward to your next video. FC...Commission,.. 😀 cheers n 73s

[@ingemarlindqvist6843]

It is very wrong facts that Marconi "invented" the radio. There were several other persons that had a larger part of the development of radio technology. Marconi was an "in between", and his main role was that he developed and understood the importance of the antenna in its most simplest fundamental construction. Marconi was only interested in wireless telegraphy, a radio communication from one person to another one person. Other persons developed the radio further so that it could be used for broadcasts to reach an audience with talk or music broadcasts. Marconi had no importance for that.

[@submarineradioman5535]

Don’t forget Loomis...

[@kenlanier2131]

Nice video. Curious, do you think a RTL-SDR using dongle SDRSharp would pickup the 10Mhz audio signal?

[@TheDigitalAura]

Don't see why it wouldn't. It should work just fine.

[@learnelectronics]

It will pick it up with an antenna that is tuned for it.

[@Bill_N7FTM]

Looks like dementia is setting in. I thought he first said the osc was 22.224 MHZ! My bad.🤔🤦‍♂️

[@the555timer]

pin 1 is the pause of the clock

[@matiasramos2409]

Great video, you could buy a cheap sw radio so you can hear that kind of frequency.

[@learnelectronics]

lol I have a very expensive ham radio that will pick it up, but I would have to move things. The next video will feature audio.

[@asunasposibol]

Thank you thank you thank you... I have been waiting for this a long time

[@3rdpig]

Good video. I'm glad I'm not the only one who can do something successfully and easily 1000 times, then when I make a video outlining it everything goes pear shaped. There's a "Murphy" just for youtubers.

[@MCsCreations]

Really interesting, dude! Thanks a lot! 😃

[@Rainbow__cookie]

Im gonna start a pirate radio channel on am band

[@jameskidd7906]

Usefull cours !

[@idexmas]

Marconi didn't invent radio. Read the historical sources

[@learnelectronics]

I never said he did. Watch the video. I said he was given credit.

[@mustafaalmusawi1803]

I enjoyed ur vedio , thank u very much

[@weerobot]

Awesome again...

[@barryrudolph9542]

Reading the responses to this video my opinion is the exception. Usually your videos are good and that is why I expected something a little better from you. I hope the following parts will be better.

[@learnelectronics]

What did you not like?

[@barryrudolph9542]

@@learnelectronics The history lesson tried my patience because in my opinion it was unnecessary fluff. Using an IC to teach how an oscillator works is like trying to teach someone how a clock works by having them observe the dial.

[@learnelectronics]

Sorry you didn't like my history lesson. As for the oscillators, I've got about 15 different videos showing oscillators made from scratch including colpitts, phase shift, five five five, relaxation, Etc. I try not to reinvent the wheel in each video. I suggest if you want to learn about oscillators you watch a few of those. The series deals more with the application of the oscillator then it's build.

[@doctorbo5810]

This video was really helpfully to me! Thank you :) Would be great if you could make a video with practical examples of how to use a function generator to test circuits or for troubleshooting purposes. In most videos, you can only see how a function generator works without getting an understanding of how to use it in daily use.

[@hikoseijuro922]

rub your hands dont let get red..sign of weakness or tiresome

[@christiannielsen3863]

mostly legal haha

[@thebeststooge]

Morning.

[@kayboku7281]

2khz or 200 hz haha

[@weerobot]

Le Button...