Hello all.
I'm learning how HF waves work.
I just want an emitter who sends a wave (30mhz)to a receiver.
So I wanted to know if my schema is right.
And how to make the receiver part please?.
Thank you all.

 

Most resonators/oscillators of this type produce a square wave from a +5V supply. This is not really an RF circuit at all. It is however rich in harmonic content due to the fast rising and falling edges. As such it has great potential to cause harmful interference. Why not take a step back and learn to crawl and walk before you try to to run a marathon.

Building a clean transmitter and a capable receiver is not much more difficult, but there are some things you need to learn. You did not specify your location so it is hard to suggest appropriate resources.

 

Thanks,I just did add a location.

 

So anything I tell you about interfering with other users of the RF spectrum would have a US bias. As such it might be misleading so I'll refrain from opining on that subject.

The quick way to find tons of information on Radio is to find a local amateur radio club. There is a website called www.qrz.com that will let you find information on licensed amateur radio operators all over the world including France. Here is a link for clubs.

http://www.dxzone.com/catalog/Ham_Radio/Clubs/Europe/France/

bonne chance!

 

Dear Papabravo.
I found out this:
I'm gonna build it tomorrow,with modification,trying to have less than 90Mhz.
I'm looking for a schema of a simple receiver(..50,60,70 or 80Mhz).
Thanks