Radio

I need to travel to Vilnius, but I don’t have a portable radio. Because the entire bus will probably be filled with hopeless nerds/engineers, I want to listen to radio, when we travel. But my phone doesn’t have an FM Receiver.

The thing is, the radio is lithuanian, and those, which broadcast through the Internet, don’t stream that station.

Any way to listen to FM radio on a Sony Ericsson S500i?

No. Try a Walkman. They’re dirt cheap.

If the energy provided from the radio waves in a crystal radio isnt enough to overcome the forward voltage drop of the diode being used, then how can a crystal radio even work?
Energy picked up by crystal radios is in the microwatt and nanowatt range, so how can the crystal radio work if the diode it used needs at least 0.3 volts to work? (Overcome forward voltage drop)

You use a very long antenna (+100 ft) to collect enough radio energy to allow operation.

And close proximity to the radio transmitter

My dad rides around in a mail truck all day and it doesn’t have a radio. He said for fathers day he wanted sirius radio and I don’t know which one to get. He was talking about a dock for it and the one I found on Amazon looks like it hooks into a pre-existing radio.

If anyone has any idea what radio I need to get, PLEASE point me in the right direction!
I can’t figure out how to respond, lmao, but they are allowed to have one. He asked for one specifically.

I don’t think they are allowed to have one.

For Fathers Day, have you considered creating a list of why you appreciate him? Answer this survey on that.
http://divpat.org/AppreciationOfDadList

I recently installed subwoofers in my truck but can’t get them to play off of my radio. I can plug an ipod to the amp and the Subwoofers will play off of the ipod. But if I connect the rca jacks from my amp to the radio deck input, the subwoofers wont play. Need help please.

Side Note: My radio works, just need help with the input and output

Connecting the amp inputs to a radio deck input won’t work. You have to connect a preamp OUTPUT from the radio deck to the amp inputs.

Most aftermarket head units include at least one set of RCA preamp outputs. Stock receivers don’t usually have preamp outputs. The solution is to "tap" the speaker outputs (most often rear speakers) and connect them to a line output converter (LOC) and use RCA cables from the LOC to your amp inputs.

Here’s an excellent 2-channel LOC with amp remote turn-on:

http://www.davidnavone.com/cart.asp?14&pid=362

I am working near a radio frequency welding machine, I already had one miscarraige. I am in the office working now. But my computer is affected everyday by the welding machines, as well as the phones. I am still around the machines at times.

It doesn’t.

I want to buy a quality radio scanner, and am looking for a scanner that can detect all legally allowable frequencies. Anyone know what all the legally allowable frequencies are and perhaps a radio scanner that can pick up all of them or close to all of them? An answer would be highly appreciated. Thanks!

you are allowed to listen to any frequency that the scanner can receive.

Scanners are required to hardware block cellular frequencies, so scaners do not and cannot be modified to, listen to cell freqs.

The rules still exist for listening to communications. The Communications Act of 1934 still exists. You may listen to anything, you may not utilize third party information, what you hear, stays with you.

There are exceptions, broadcast radio is exempt, hobby services are exempt, unlicensed services are exempt.

My radio always restarts the moment I start my car..
Is that because my starter motor takes all power from my battery and leaves nothing behind for my radio?
My mom her car doesnt have this problem.

Is this an aftermarket radio? If so it most aftermarkets have a permanent power feed line on them. Someone may have installed it incorrectly.
If it’s factory, it’s possible that a connection is loose or the radio itself has a short. You may also want to replace the radio fuse in your car to see if that helps.

Does the FM radio works similar to a TV? I mean the way it transmits signals. Do they have the same signals that they receive?

I am just a bit curious here. My Nokia 5310 XM has FM radio. I am just wondering If I can turn my cellphone into a TV by downloading some kind of java application that receives signals just like the built in FM radio.

TV waves are much more complex than radio waves,although they can use the same frequency. The entire FM radio band is actually located between TV channels 6 and 7! But it’s not possible to do what you suggest. As far as I know,cellphones that play video do so by decoding digital formats,like MPEG,from the Internet. However, technology is coming that will enable mobile TV reception since transmission went digital last year. Chrysler has a setup like this coming out in some of it’s minivans.

How does a radio filter out waves of different frequencies?
With all the different frequencies of waves in the air, how does the sound out of a radio come out clear?What do I need to make one?

dear radio does not filter any waves!! let me explain..
Radio has a demodulator in it. it is a PLL. now the demodulator ics like MM74HC4046 are connected in a standard circuit. when you tune the radio for a frequency, which is actually changing the resistor values for the oscillator, you demodulate the frequencies one by one. supose your range is from 300 KHz to 10 MHZ then as you turn the knob, and your circuit has range 300KHz – 12 MHZ thn your starting freq is 300KHz. then as you turn the knob you increase or decrease the resistance and start tuning the circuit. then your first station is at 598khz. at that freq u hear the channel. then as you turn along it goes higher. at 3.9MHZ you listen to different channel. so thats no problem. also the PLL is there which gets locked at a frequency and so there is a conitnuous demodulation at this frequency. I’ve already told you one ic and there are many others. also another is 7046.
if you want ot make one then search FM demodulators by 4046 and use the MM74HC4046. it gives higher selection from short wave, medium wave and FM also.

You know how you see the police talk into the radios they have clipped on to their belt or that sits in their car? Is that a CB or a Ham Radio? Or is it something else? I would appreciate it if you could answer if you have the law enforcement experience or are related to somebody who is law enforcement.

My county dispatch recently switched to 800Mhz. Other places I have worked transmitted on 400Mhz and although it’s a dinosaur by comparison, 150Mhz. These are all FM frequencies.