Best Radio Frequency AM/FM radio

In summary, the conversation discussed building an AM/FM radio and determining the best frequency and wavelength for reception. One solution proposed was to judge the quality of the radio waves by the amount of static and clarity. Another suggestion was to use a transmitter and differential amplifier to determine the frequency with the least noise. The possibility of the term "best" being subjective was also mentioned. Finally, the conversation touched on the type of antenna used and its relation to frequency range.
  • #1
jsea-7
14
0

Homework Statement



Build an AM/FM radio. Determine the frequency and wavelength of the radio wave for best reception.


2. The attempt at a solution

I have built a AM/FM radio. My only problem is how do I determine the optimum frequency for best reception? I have only one solution and that is going through the spectrum of radio waves that my radio picks up and judging whether they are good or bad by how much static is in the background and how clear the sound is. Is this the optimum solution to finding the best way to determining the best frequency and wavelength for best reception? Or is there another way?
 
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  • #2
It does seem a strange/vague problem. The term "best" can be terribly subjective.

One idea that cam to mind, however was if you had a transmitter as well, you could take the output of the receiver, and subtract the input of the transmitter (use a differential amp). Then you could make a case that the frequency with the least amount of noise had the best reception. (This assumes that the transmitter broadcasts equally well across all frequencies/modes.) You probably want to minimize 1. distortion and 2. noise.

But with a vague term like "best" you could easily claim that everything on the airwaves is rubbish nowdays, and the best reception is the frequency where your radio fails to operate, producing wonderful golden silence. Or claim to be a fan of white noise, and choose the frequency with the most static.

Your method doesn't sound too bad either.
 
Last edited:
  • #3
jsea-7 said:

Homework Statement



Build an AM/FM radio. Determine the frequency and wavelength of the radio wave for best reception.


2. The attempt at a solution

I have built a AM/FM radio. My only problem is how do I determine the optimum frequency for best reception? I have only one solution and that is going through the spectrum of radio waves that my radio picks up and judging whether they are good or bad by how much static is in the background and how clear the sound is. Is this the optimum solution to finding the best way to determining the best frequency and wavelength for best reception? Or is there another way?

Maybe they're just asking about the antenna and its frequency range. What kind of antenna did you mate with this radio that you "built"?
 
  • #4
berkeman said:
Maybe they're just asking about the antenna and its frequency range. What kind of antenna did you mate with this radio that you "built"?

I just attached a simple vertical antenna to the radio. Its a type of antenna that you would usually find on radios. I hope that is what you were asking.
 
  • #5
jsea-7 said:
I just attached a simple vertical antenna to the radio. Its a type of antenna that you would usually find on radios. I hope that is what you were asking.

And how would the length of that antenna be related to what frequencies the radio can pick up most efficiently?
 

1. What is the difference between AM and FM radio?

The main difference between AM (amplitude modulation) and FM (frequency modulation) radio is the way in which the audio signal is carried. AM radio uses changes in the amplitude (strength) of the radio wave to transmit the audio signal, while FM radio uses changes in the frequency (number of waves per second) of the radio wave. This results in different sound quality and range for each type of radio.

2. How does radio frequency affect the quality of a radio?

The radio frequency refers to the number of waves per second that the radio wave is transmitting. A higher frequency can result in clearer and more detailed audio, while a lower frequency may have more static and interference. The quality of a radio also depends on factors such as the antenna, receiver, and surrounding environment.

3. What is the best frequency range for an AM/FM radio?

The best frequency range for an AM/FM radio will depend on your location and the types of stations you want to receive. Typically, AM radios will have a frequency range of 540-1600 kHz, while FM radios will have a range of 88-108 MHz. It's important to check the frequency range of your radio to ensure it can pick up the stations you want to listen to.

4. Can I use an AM/FM radio to pick up satellite radio stations?

No, an AM/FM radio is not able to pick up satellite radio stations. Satellite radio uses a different type of signal and requires a specialized receiver to access the stations. You will need to purchase a separate satellite radio or a radio that is specifically designed to receive satellite signals.

5. How can I improve the reception on my AM/FM radio?

There are a few ways to improve the reception on your AM/FM radio. First, make sure your antenna is properly positioned and extended. You can also try moving your radio to a different location, as nearby objects and buildings can interfere with the signal. Additionally, using a signal booster or purchasing a radio with a stronger receiver can also improve reception.

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