I like the fact that you get to the point. secondly you simplify the project. great job!!!!! you are better than any teacher I have ever had in electronics. I am 50 years old. again thank you. ok a job to do....... build a tube transmitter.
+Richard rheam Thanks for the compliment. I have lots of leftover tubes, and other parts, so I can definitely make a time transmitter. Those are better because they can put out more watts!
We’ve got a good tech and instructor in the making here. I was a lad too learning electronics from an WWII wounded VET. At first Inwas his arms and legs, but as he worked he would explain to me what I was doing. He also assigned reading homework. All pf this for 59 cents an hour to boot.
Changing the upper trigger threshold (with audio voltage) via pin 5 changes only high output duration of the 555 timer, resulting in changing both its duty cycle and frequency. The output amplitude is still the same (pretty much 0 V to PS voltage). What you might have heard on an AM radio was at best noises from a pulse-width modulation simulating AM. Using values of Ra, Rb, and C (look up 555 data sheet), your max frequency is roughly 480 KHz so it’s not even in the AM band. Hook up your transmitter output to a scope or a spectrum analyzer and show how your AM output looks like!
KE5VQY...CQ....CQ.... Yeah Finally someone has detailed the pertinent information on the How & Why to's of AM Radio build. Thank you and good luck with your adventures.
I have been trying some stuff with a HF chip and transmitting data on 2.4ghz. Your description of harmonics was very useful, for some reason I could never understand harmonics until now.
You can clean the carrier wave out a little bit by adding a band pass filter between pin 3 and antenna. This will actually sound a little bit more like a normal AM radio station. Normal AM station has 8 kHz bandwidth around carrier wave, which leaves mono sound in up to 4.5 kHz - not very much, but still suitable for music playback. Not talking about speech... That way you won't spit out junky harmonics and your transmitter will work well. However, you probably should make transmitter in another AM band that's not used by broadcast, if you want to transmit to a long distance (legally, of course).
Well done sir! I would have liked to have seen the waveforms. I’ll do that when I build the circuit. In My circuit I would like to try a 455 Kilohertz crystal generated signal for doing AM IF alignment. I recognize your tube radio, a GE model with a Techron clock I believe. Oh by the way I started out in this field when I was about 12 years old working with only tube circuits. Transistors although they had been invented were not economically available to experimenters until about 1958. Good job my lad!
The noise is partially from the fact that I am using a 555 timer as the carrier wave(lots of harmonics) and the solar panels on the roof with noisy(electromagnetically speaking) inverters
I put the input from the laptop into a 1000:8 CT audio transformer and the quality sound was much better. From laptop, 500 ohm and the circuit side was 8 ohms.
The simple am transmitter output now needs to be connected to a fet gate then a tuned circuit connected to the drain,, source to ground , you will have a nice sine wave across the coil your old radio will like your transmitter.
An AM crystal controlled transmitter? I’m assuming you mean that you are using a Quartz Crystal Oscillator. Anyway, it is impossible to change the frequency using a crystal oscillator because most of not all of the oscillators are made at a specific frequency and cannot be changed.
Stunning!!! But I can't quite understand the circle ... How it works exactly ... The drawing is not so clear either ... I'd love if something explained a little more to me.
I'm trying to make a transmitter circuit and a receiver circuit that will control the motors in a Remote Control Boat. But I can't find enough information online/google. Does anyone have the schematics for a transmitter circuit? I'm trying to build it as low level as possible so I will be soldering transistors and stuff. It will be a learning project for me. I would appreciate any information on the subject. I am an beginner in electronics with some experience reading schematics and I know a little about transistors, resistors, capacitors.
You could try re-creating the first ever RC boat. Look up the coherer. It was the way that Tesla was able to control his boat. Transistors were not even used!
Great video Young Technician! I'm impressed by your knowledge, willingness to share and enthusiasm. Why not made a video constructing this AM transmitter? 73, Joe-k4jga
Am and fm aren’t radio frequency’s. they are different forms of modulation! DSB is am without a carrier and SSB is am without a carrier and either the top or bottom of the wave
I know, just shows how elevating interference to felony charges, protects broadcasters from anyone infringing on their 'ownership' of the airwaves. Sinclair Corp. has most of US allocations.
I built this from your diagrams about 4 years ago, worked like a charm! 👍😎
I am impressed by your precise and understandable explanation. Keep on with your work!
I like the fact that you get to the point. secondly you simplify the project. great job!!!!! you are better than any teacher I have ever had in electronics. I am 50 years old. again thank you. ok a job to do....... build a tube transmitter.
+Richard rheam Thanks for the compliment. I have lots of leftover tubes, and other parts, so I can definitely make a time transmitter. Those are better because they can put out more watts!
Tanner Tech ... yes, would be very interesting seeing the outcome of a tube transmitter, Do It! Lol.. 73, Joe-k4jga
We’ve got a good tech and instructor in the making here. I was a lad too learning electronics from an WWII wounded VET. At first Inwas his arms and legs, but as he worked he would explain to me what I was doing. He also assigned reading homework. All pf this for 59 cents an hour to boot.
Changing the upper trigger threshold (with audio voltage) via pin 5 changes only high output duration of the 555 timer, resulting in changing both its duty cycle and frequency. The output amplitude is still the same (pretty much 0 V to PS voltage). What you might have heard on an AM radio was at best noises from a pulse-width modulation simulating AM. Using values of Ra, Rb, and C (look up 555 data sheet), your max frequency is roughly 480 KHz so it’s not even in the AM band. Hook up your transmitter output to a scope or a spectrum analyzer and show how your AM output looks like!
KE5VQY...CQ....CQ....
Yeah Finally someone has detailed the pertinent information on the How & Why to's of AM Radio build.
Thank you and good luck with your adventures.
Cool vid Sid. I was amazed when I learnt that the 555 could switch at RF. Well done. And I like the typewriter at the beginning.
The 555 timer is usable up to about 2 MHZ
5 years in the future you'll have33k users and we'll still want some AM radio- thanks for sharing and Yeah you!
I have been trying some stuff with a HF chip and transmitting data on 2.4ghz. Your description of harmonics was very useful, for some reason I could never understand harmonics until now.
You can clean the carrier wave out a little bit by adding a band pass filter between pin 3 and antenna. This will actually sound a little bit more like a normal AM radio station. Normal AM station has 8 kHz bandwidth around carrier wave, which leaves mono sound in up to 4.5 kHz - not very much, but still suitable for music playback. Not talking about speech... That way you won't spit out junky harmonics and your transmitter will work well. However, you probably should make transmitter in another AM band that's not used by broadcast, if you want to transmit to a long distance (legally, of course).
just over a year later and he has 11k subs, he deserves them, not many intelligent people on youtube anymore
if I chance audio input to another signal which is output from adruino, have square wave. this circuit an operate?
Congrats on 1,000 subs. You should do something with 1,000 volts.
+Robert George Good idea, maybe I'll make a circuit with components that all have a value of 1000, then power it with 1000 volts.
how long must be the antena?
Excellent, thank you
Can u plz send me what components we need and circuit diagram
Thanks for an excelent explanaition
I think it is so cute that you call it a "piece of" breadboard. :-)
Well done sir! I would have liked to have seen the waveforms. I’ll do that when I build the circuit. In My circuit I would like to try a 455 Kilohertz crystal generated signal for doing AM IF alignment. I recognize your tube radio, a GE model with a Techron clock I believe. Oh by the way I started out in this field when I was about 12 years old working with only tube circuits. Transistors although they had been invented were not economically available to experimenters until about 1958. Good job my lad!
Tanner, couldn't you also use the transformer, crystal oscillator schematic for this?
what are the components sir?
Very nice. Keep up the good work!
how do i test it without a am radio
I just found this amazing! Why not make a Tesla Coil resonant to certain frequency within AM band; make it the transmission antenna!
I want to make Morse code then AM modulation with carrier wave. Do you know How to do it?
Thanks for the video, can you post the materials needed to build this?
Can you show me the diagram full
Building AM xmit for same reason, but why all the noise? And what do you have to do to get rid of it?
The noise is partially from the fact that I am using a 555 timer as the carrier wave(lots of harmonics) and the solar panels on the roof with noisy(electromagnetically speaking) inverters
I put the input from the laptop into a 1000:8 CT audio transformer and the quality sound was much better. From laptop, 500 ohm and the circuit side was 8 ohms.
The simple am transmitter output now needs to be connected to a fet gate then a tuned circuit connected to the drain,, source to ground , you will have a nice sine wave across the coil your old radio will like your transmitter.
Nice Video... I like the video... more projects like this...
Very well explained keep tinkering
how much values of capacitor do you use for audio filtering between cv and gnd
Very informative. i would like to know how to change frequency of a small AM crystal controlled transmitter.
An AM crystal controlled transmitter? I’m assuming you mean that you are using a Quartz Crystal Oscillator. Anyway, it is impossible to change the frequency using a crystal oscillator because most of not all of the oscillators are made at a specific frequency and cannot be changed.
Stunning!!! But I can't quite understand the circle ... How it works exactly ... The drawing is not so clear either ... I'd love if something explained a little more to me.
cool am transmitter great job!
I'm trying to make a transmitter circuit and a receiver circuit that will control the motors in a Remote Control Boat. But I can't find enough information online/google. Does anyone have the schematics for a transmitter circuit? I'm trying to build it as low level as possible so I will be soldering transistors and stuff. It will be a learning project for me. I would appreciate any information on the subject. I am an beginner in electronics with some experience reading schematics and I know a little about transistors, resistors, capacitors.
You could try re-creating the first ever RC boat. Look up the coherer. It was the way that Tesla was able to control his boat. Transistors were not even used!
Hi Tanner great job !!!
Is there a way i can contact you ?
I bet if you put a high power mosfet on the output you could boost the power😁
6:50
Important note
Where to put the male audio jack pls ?
There are two 10nF capacitors conneced to pin-5. One goes to ground, the other goes to audio L-and/or-R. Audio common/shield goes to pin-1/ground.
Is that a 10nF capacitor? I thougt that was a 10uF electrolytic capacitor?
@@armanmallari8147 replace that with a small audio transformer... like the Shure 51A312 ($8) and it will couple better..
Make a Tesla, irf260, video of the irf260 field effect tube. ?
EXCELLENT VIDEO ,,,,DIDN'T I SEE YOU ON THE STAR WARS MOVIES ????
4:08
Output pin: pin number 3
4:00
Control Voltage pin: pin number 5
Great video Young Technician! I'm impressed by your knowledge, willingness to share and enthusiasm. Why not made a video constructing this AM transmitter? 73, Joe-k4jga
Very cool dude :-)
sweet vid i gotta try this🇬🇧😁👍
simple & brilliant..
kick ass bro !
Am and fm aren’t radio frequency’s. they are different forms of modulation! DSB is am without a carrier and SSB is am without a carrier and either the top or bottom of the wave
Stuff it pops!
The simples way to make an AM transmitter is to use a quarz oscillator and to modulate its operating voltage.
Very enjoyable! w0xs
+Greywolf3 Thanks!
Try to use a crystal divided several times and so ever
Good idea! That is a great way to get a stable square wave
No sound quality
How many years in prison and dollars fined for interfering with EBS system? (emergency broadcast system of gov. and broadcasters)
Not sure, but I'm not messing with there system. This thing only has a range of 10 feet. Besides, I have a ham radio license.
I know, just shows how elevating interference to felony charges, protects broadcasters from anyone infringing on their 'ownership' of the airwaves. Sinclair Corp. has most of US allocations.
Can I just an AM transmitter? Loo
📻👍👌👏👏
Kilocycles hasn't been used officially anymore... its kilohertz or kHz.
True, I just figured that I might as well use old lingo when dealing with an old radio.
..
I can't see how this works. Pin 5 is the control Voltage pin. This would Frequency modulate the oscillator not amplitude modulate it. VCO
except what he is confused about is the terminology AM and FM are not frequencies as he said but different MODES of transmission.
Yes....AM is Amplitude modulation and FM is frequency modulation.