Build a FM Radio Receiver: What Do I Need?

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Discussion Overview

The discussion revolves around the construction of an FM radio receiver, focusing on the necessary components and approaches for building one. Participants explore various methods, including using kits versus discrete components, and the educational value of each approach.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested
  • Homework-related

Main Points Raised

  • One participant expresses a desire to build an FM radio receiver but lacks knowledge about the required components.
  • Another participant suggests that building an FM receiver may be overly ambitious for a beginner in electrical engineering (EE) and inquires about the original poster's level of knowledge.
  • Some participants recommend using kits for building FM radios, noting that while they provide satisfaction in assembly, they may not offer much learning about the underlying technology.
  • There is a suggestion to explore older DIY designs from radio amateur forums, emphasizing the potential for learning from experienced builders.
  • One participant proposes that if the goal is to understand circuit functions, building individual components like an FM discriminator could be beneficial, even if it doesn't result in a complete receiver.
  • Another participant mentions the importance of construction techniques for VHF FM radio to achieve usable results.
  • Concerns are raised about the potential difficulties in getting a kit to work without proper test equipment and the possibility of errors during construction.
  • Participants discuss the practicality of alternative projects, such as building an AM radio or test equipment, as potentially more feasible for learning purposes.

Areas of Agreement / Disagreement

Participants express differing views on the best approach to building an FM radio receiver, with some advocating for kits and others for discrete components. There is no consensus on the most effective method or the educational value of each approach.

Contextual Notes

Participants mention the need for careful construction techniques for VHF FM radios and the potential challenges in learning from kits versus discrete builds. There is also a reference to the availability of resources and forums for further assistance.

Who May Find This Useful

Individuals interested in building FM radios, electrical engineering students, hobbyists looking to deepen their understanding of radio technology, and those seeking community support in DIY electronics projects.

nero1987
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hello i am new, i thinking to make a fm radio receiver but i don't know what i need (capacitor, oscillator etc) can someone help me with more knowledge than me ? if you have link or something else that maybe help me is welcome. i search the internet but i don't can find anything that suit in my problem. i don't know if this is the right topic, excuse me ...
thanks in advance!
 
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Hi and welcome.
I would say that an FM receiver would be an overambitious project with which to start on EE.
What is your level of EE knowledge?
 
If you really want to make an FM radio, there are kits available.

I just did a search on Google and there are dozens of them available.

They supply all the bits and you solder the components to a printed circuit board and then mount it in a case.

It is a fairly expensive way of getting an FM Radio and you won't learn much about how they work because someone else has already done the clever stuff for you.

But, there would be some satisfaction in assembling it yourself.
 
sophiecentaur said:
Hi and welcome.
I would say that an FM receiver would be an overambitious project with which to start on EE.
What is your level of EE knowledge?

BEng, is good enough ? can you help me please ?
 
vk6kro said:
If you really want to make an FM radio, there are kits available.

I just did a search on Google and there are dozens of them available.

They supply all the bits and you solder the components to a printed circuit board and then mount it in a case.

It is a fairly expensive way of getting an FM Radio and you won't learn much about how they work because someone else has already done the clever stuff for you.

But, there would be some satisfaction in assembling it yourself.

i know about fm radio kits but is have microchips than a lot of electronic components (diodes etc)
 
nero1987 said:
BEng, is good enough ? can you help me please ?

Fine - so you know one end of a resistor from another! :smile:

I would have suggested a kit (which is what I would use if I were to want to make an FM receiver) but you say that you would like to go discrete.
My recommendation would be to get onto a Radio Amateur forum and ask about the thousands of older DIY designs that were around 30years ago. There were a whole lot of them in the Mags at the time - along with descriptions of the functions of the parts of the circuit. There are bound to be old geezers of my age who have had lots of experience with constructing receivers of all sorts. They will be only too pleased to give you info.

Many contributors to this forum are into more fundamental stuff or are just too young to be of much help with this, I should have thought.
 
It may depend on why you want to do this project. If you really want a receiver 'to use' then a kit would be best, by far. If you want to get familiar with the functions of different circuit blocks then you might find it worthwhile making a bit at a time - for instance, a conventional FM discriminator, on its own would be fun to build and to operate - if you have a suitable signal generator with which to test it. etc etc. You could also use a PLL chip or a Pulse counting type, to see the different features. This wouldn't give you a listenable receiver but you would be a lot wiser about RF matters.
 
thanks you, do you have to recommend me any forum ?
i want to make an fm radio without microchip, and receive the signal and listen music...
i want to learn how is working in real life and no in wikipedia
 
I don't read Ham Radio forums except when a Google search for a topic takes me there.
I suggest you try the RSGB (the UK organisation) and register on their forum but there are many other national groups. In which part of the world are you located? You could try there first.
 
  • #10
Here is a kit which seems to use simple parts. I can see one integrated circuit for the audio output, but otherwise it uses individual transistors.

http://www.mcmelectronics.com/product/ELENCO-AMFM108K-/80-1195

4013141.jpg


It costs about $37.

However, I really doubt that you would learn anything by building it and there is a chance you would not be able to get it working without test equipment. This is especially true if you make any errors in constructing it.

For comparison, I have a 1 GB MP3 player that would hold about 250 songs and it cost about $25. It has a superb sounding FM radio, with a digital frequency readout, built into it.

It would be a much more practical project to build an AM radio or even some test equipment. Perhaps an RF signal generator.

FM radio is on VHF and this means you need very careful construction techniques to get usable results.
 

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