it is beneficial. however, the time domain analysis is still remaining which helps the reader that how the output of modulating signal is changed with respect to the message signal.
It’s been a week since I decided to take on this project. I have visited so many sources and Read so many content. This is the first schematic I have seen where a tutor clearly explains what and why is doing every stage. Thank you so much .However I’m still a little confused about the modulator ie C3 is mixing the LC tank carrier wave and sign input wave from emitter If I’m right. How does C3 ebable this mixing to happen if I’m I get this right?
Hi, C3 has a major function to keep the LC tank above (L1 and C1) to continue oscillating, if it was not there it will oscillate till the energy between L1 and C1 decreases to zero, depends on the Q factor and internal series resistance of C1, hope this answers your question
nice, we need your help, we as many others build rc submarines, and all modern tx brands has move to 2.4ghz radios, and you can already imagine how that works on rc submarines, we want to build a transciver, its a madness to desing the entire tx system, so what we trying to make is a device that can grab the output of a modern rx servos output or a ppm output of the tx and retransmited in a lower frecuency, like 27,40 or 72 mhz, can you help us?
for 100Km you will need 10 watts or above (depends on noise and view of site), this require very good filtering and design - otherwise your transmitter will create a lot of noise and interfere other stations near you. for this I would recommend using professional power stage that will eliminate these effects, you can start with something like this ebay.to/31yehrz that will work for 10-20Km estimate
I'm so confused, maybe you could help. 1) Isn't the signal input an audio signal (20 - 20kHz), why are you putting a signal that goes to 1 GHZ ? 2) It's a FM transmitter so should the frequency of the carrier signal not change? From what I see there it's actually the amplitude that is changing around the carrier wave frequency...so this is AM ? o.O Thx for any feedback
Yes Audio is usually 20-20Khz correct. the 1Ghz is the limit that I am putting to simulation, you can put other values, but you want to see that you don't have other replicator of the frequency, so it is a good habit to look much higer frequncies that your circuit should work with. and Yes the FM is frequency changes (which you of corse don't see here) - in this simulation you just see the MAIN frequency of transmitting
1) ahh yes I understand you just wanted to analyse the behaviour over the whole Spektrum. 2) Do you think there's a way to see the frequency changing in the simulation? Maybe reducing the carrier wave frequency? Maybe you could make a vid with a simulation like that xP Awesome vid btw. Thx :)
![ค้างคืนโรงเก็บกระสวยอวกาศร้างกลางทะเลทราย [Around The World Ep. 3]](http://i.ytimg.com/vi/E5bWZQhABJE/mqdefault.jpg)
it is beneficial. however, the time domain analysis is still remaining which helps the reader that how the output of modulating signal is changed with respect to the message signal.
Please let me know, If I app the input frequency 60 MHz and the output frequency 1030 MHz, will there be any problem in the circuit ???
It’s been a week since I decided to take on this project. I have visited so many sources and Read so many content. This is the first schematic I have seen where a tutor clearly explains what and why is doing every stage. Thank you so much .However I’m still a little confused about the modulator ie C3 is mixing the LC tank carrier wave and sign input wave from emitter If I’m right. How does C3 ebable this mixing to happen if I’m I get this right?
Hi, C3 has a major function to keep the LC tank above (L1 and C1) to continue oscillating, if it was not there it will oscillate till the energy between L1 and C1 decreases to zero, depends on the Q factor and internal series resistance of C1, hope this answers your question
nice, we need your help, we as many others build rc submarines, and all modern tx brands has move to 2.4ghz radios, and you can already imagine how that works on rc submarines, we want to build a transciver, its a madness to desing the entire tx system, so what we trying to make is a device that can grab the output of a modern rx servos output or a ppm output of the tx and retransmited in a lower frecuency, like 27,40 or 72 mhz, can you help us?
I did following your video, but I am not able to get the peak (NARROW) resonance like in your video and my gain is near 0dB.
it did not work in circuit or in your simulation?
@@RoeeBloch simulation
Can you put one more video starting 4m begining to layout. For any better project
@@RoeeBloch Can you put one more video starting 4m begining to layout. For any better project.
no where do you show frequency modulation
Sir I want to buildup more than 100Km distance cover FM Transmitter so how can I do It and which component is used for that???
for 100Km you will need 10 watts or above (depends on noise and view of site), this require very good filtering and design - otherwise your transmitter will create a lot of noise and interfere other stations near you. for this I would recommend using professional power stage that will eliminate these effects, you can start with something like this ebay.to/31yehrz that will work for 10-20Km estimate
where is the next part?
I'm so confused, maybe you could help.
1) Isn't the signal input an audio signal (20 - 20kHz), why are you putting a signal that goes to 1 GHZ ?
2) It's a FM transmitter so should the frequency of the carrier signal not change? From what I see there it's actually the amplitude that is changing around the carrier wave frequency...so this is AM ? o.O
Thx for any feedback
Yes Audio is usually 20-20Khz correct. the 1Ghz is the limit that I am putting to simulation, you can put other values, but you want to see that you don't have other replicator of the frequency, so it is a good habit to look much higer frequncies that your circuit should work with. and Yes the FM is frequency changes (which you of corse don't see here) - in this simulation you just see the MAIN frequency of transmitting
1) ahh yes I understand you just wanted to analyse the behaviour over the whole Spektrum.
2) Do you think there's a way to see the frequency changing in the simulation? Maybe reducing the carrier wave frequency? Maybe you could make a vid with a simulation like that xP
Awesome vid btw. Thx :)
kindly sir add FM receive circuit using LTspice.
Didn't understand the working of the circuit
الرجاء تنزيل خريطة لجهاز ارسال اف ام 10وات وخريطة لينير 100 وات
this is not working in real life. i didnt get any signal from fm radio. can you make this for real and show how to operate this circuit