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Product Description
Specification
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Specifications:
- Frequency Range: FM 64-108 MHz; AM 522 - 1710 KHz (9k tuning step); SW 2.30 - 21.85 MHz
- Memory Preset: 90, FM , AM and SW ( 30 x 3)
- Noise Limit Sensitivity: FM better than 3.5uV, MW better than 3mV/m, SW better than 32uV
- Single Signal Selectivity: >40dB
- SNR: FM >= 45dBu; AM > = 40dBu; SW >= 40dBu
- Power: DC 3V 300mA or 2 x AA batteries (not included)
- Maximum Current Consumption: <200mA
- MPO: ≥100mW
- Stereo Reception Separation: >=20dB
- Speaker: 57mm/8ohm/0.5W
- Earphone Jack: 3.5mm 32ohm
- Size: 121 x 74 x 25mm / 4.76 x 2.91 x 0.98in(L x W x H)
Features:
- AM/FM/SW radio
- FM stereo
- This full wave band radio adopts advanced SDR technology
- Imported high quality DSP processor
- Build in high speed MCU circuit
- Signal strength indication
- Four searching modes
- Manual scan
- Auto scan
- 90 memory presets
- Tuning knob
- 40 levels electronic volume control
- Wake-to-radio
- Perpetual calendar
- Sleep function
- Telescoping antenna
- The full wave band radio is with built-in speaker
- Standard earphone jack
Details:
- Advanced DSP digital tuning AM/FM/SW pocket radio receiver
- The full wave band radio offers manual, auto tuning and 90 memory presets
Size in Detail:
How Does FM Radio Work?
Sound Waves and Frequency:- All sound energy is in the form of a wave. The frequency of a wave is the measurement of the number of cycles that it undergoes in a given time frame. Hertz is a measurement of frequency that depicts the number of wave cycles per second. FM signals are measured in megahertz so an FM signal of 97.5 relates to 97,500,000 waves/second
Frequency Modulation:
- FM actually stands for Frequency Modulation. FM signals use various frequency levels that reproduce the sound of the originating source (i.e. music). You've probably noticed that FM contains all your music channels while AM radio is limited to news and talk programming. This is because frequency modulation allows for the transmission of the greater range of frequencies (high and low sounds) contained within music.
Transmission:
- FM radio originates at the broadcast source (radio stations). These stations use large antennas to send out their broadcast signal. Electrical charges are pushed up and down the broadcast antenna at a rate that relates to the carrier frequency. The movement of electrical charges creates an electromagnetic field which sends out
- electromagnetic waves. The waves are sent in all directions. Carrier waves are sent out at a frequency that can be detected by your antenna (the radio station number). They carry sound information that includes the different frequencies of the original broadcast
Reception:
- The electromagnetic carrier wave travels through the atmosphere until it is picked up by a receiver antenna (i.e. your car radio antenna). At this time the wave causes electrical charges to be pushed up and down your antenna and on into your receiver. The receiver decodes the modulated frequency information and then passes it to the speakers
Processing and Hearing:
- The speaker vibrates according to the processed frequencies and pushes air molecules that recreate the original sound waves and pass them to your ears. You hear the music or talk that was sent in the original broadcast. Since electricity works at the speed of light, this process, from broadcast to listener, is instantaneous
Loss of Signal:
- You've probably noticed, particularly if you listen to FM radio in the car, that eventually you will lose your signal. The simple reason for this is that the short wavelength of FM radio waves cause them to travel in straight lines. The earth, however, is curved. Therefore, as the earth curves, FM waves continue in a straight line into the atmosphere and are no longer receptible. The short waves are also affected by obstacles like mountains
How to Build an FM Radio?
- A radio provides signal transmission via the use of electromagnetic waves. The frequencies a radio uses are lower than those of visible light. A German scientist by the name of Heinrich Hertz was the first to detect and product radio frequencies, in 1888. Radios are still in wide use, even in this internet age.Building a simple FM radio only requires a small amount of time and materials. Although this radio is fully functioning, it isn't very pretty
Instructions:
- Solder the ferrite loop to the variable capacitor. Only solder the ferrite wire that is painted black. Make sure you are soldering the ferrite loop to the center lead of the variable capacitor
- Solder the unpainted wire of the ferrite loop to the variable capacitor's right lead
- Solder the germanium diode to the same right lead of the variable capacitor as the unpainted wire of the ferrite loop. Only connect one end of the germanium diode
- Solder one end of the piezoelectric wire to the other (free) end of the germanium diode
- Solder the other end of the piezoelectric wire to the variable capacitor's center lead
- Take note of the red-painted wire of the ferrite coil. Use an alligator clip to attach it to the antenna wire
- Use the remaining alligator clip lead to attach the green-painted wire of the ferrite coil to a good ground. You can use a cold water pipe for the ground
Package Included:
- 1 x Portable Satellite Radio
- 1 x Earphone
- 1 x User Manual
Customers' Reviews
Overall:
( 16 Reviews)
Price:
Quality:
Ease Of Use:
Usefulness:
Features:
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I have bought this product
Matthew Holdren
from ()
Bought this item on
01-19-2011- Other Thoughts: Can't tell about the battery, because I have it plugged in. It is the perfect size for a window sill, and the sound is good.
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Paul Murphy
from ()
Bought this item on
12-13-2010- Other Thoughts: My husband had despaired of finding a basic AM/FM radio to use in his office, his workshop, and out in the yard. So it needed to run on batteries and AC (if possible). Based on the reviews I read I knew this had decent sound, had a self-contained AC cord, and good reception/station locating. He has not had to run it on batteries yet, but he is very happy with the size (not too big, but not too small)--it doesn't get in his way and it doesn't get covered up easily either. He is a little hard of hearing (having flown loud airplanes in the Air Force), but has no problems hearing this radio without using headphone.
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James Duran
from ()
Bought this item on
11-23-2010- Other Thoughts: Reception in my office with my old 33 year old clock radio was iffy at times. My body also had an effect on reception as well. Finding a sweet spot was sometimes difficult. With the Sony that is now a thing of the past. Stations come in clear. (Sometimes it takes a little work with the tuning knob to get the best possible reception.) I don't play my music loud so this little radio suits me fine.
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Leslie Holland
from ()
Bought this item on
10-27-2010- Other Thoughts: So far the radio has provided excellent sound. It is a very basic radio but exactExcellent radio at a good pricely what I was looking for at a reasonable price.
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Brett Stewart
from ()
Bought this item on
10-12-2010- Other Thoughts: The Portable is an old line item that performs very well. It's a bit larger than ideal but works very nicely. Battery operated portable radios are hard to find today so an efficient, classic looking model is a fine discovery. I recommend it.
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Deanna Wiseman
from ()
Bought this item on
09-21-2010- Other Thoughts: For the price you can't find a portable radio like this anymore. And it has an AC plug too. Great bargain.
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Kevin Tam
from ()
Bought this item on
09-14-2010- Other Thoughts: I bought this as a Christmas gift for a friend who requested it to listen to ball games. She said it comes in perfectly, and the reception has been great out on her deck. It is lightweight, but kicks out quality sound. I would recommend it for anyone looking for this type of radio, SOny did not disappoint!
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Jongkook Park
from ()
Bought this item on
08-17-2010- Other Thoughts: The Portable AM/FM radio serves the purpose that I needed it for, for the most part. It is easy to use. However, the reception is somewhat sketchier than I expected for both AM and FM.
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