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TECSUN

BCL-2000 Handheld Portable Multi Band AM FM Radio

( 90 Reviews)
 
US $85.39
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The powerful Multi Band Radio provides a comfortable handle designed to ensures you can easy to take it to anywhere with you! The 75 ohm antenna jack allows you via the multi band radio connect to the cable FM and FM DX. The medium wave radio provide up to five wave band FM, MW, SW option which allows you receive more of your favorite radio station! The digital best portable radio adopted the newest convert technique ensures it can work normally under different extreme weather condition! This world band radio provides an option to select the time you would like to stop listening automatically! The backlit LCD display clarity displays time, signal weakness, battery life and frequency!Easy-to-tune and precise tuning knot allows you easy to access to your favorite radio station! Deep Bass Boost adds to your stereo speakers allows you effortless enjoy your favorite radio station and without any interference!

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  • Specifications:

    • With high technology, this Multi Band Radio has a higher sensitivity and stability
    • This Multi Band Radio can turn off automatically after 1-2 hour if you set
    • This world band radio can memorize programs you like
    • With fashion look, this best portable radio can show your taste
    • This multi band radio is made of high quality material, durable and it can last for a long time
    • You can search the program by hand or input the frequency range With this radio, you can also scan the program saved before
    • Power: 4 x D Batteries
    • Size: 173 x 272 x 88mm/6.8 x 10.7 x 3.5in(L x W x T)

    Details:

    Tecsun BCL-2000 Handheld Portable Multi Band AM FM Radio

    • The powerful Multi Band Radio provides a comfortable handle designed to ensures you can easy to take it to anywhere with you 

    Tecsun BCL-2000 Handheld Portable Multi Band AM FM Radio 

    • This multi band radio's MW and SW also can be connected to the 500 ohm antenna and earth
      Wire

    Tecsun BCL-2000 Handheld Portable Multi Band AM FM Radio

    • The medium wave radio provide up to five wave band FM, MW, SW option which allows you receive more of your favorite radio station

    Tecsun BCL-2000 Handheld Portable Multi Band AM FM Radio
    Tecsun BCL-2000 Handheld Portable Multi Band AM FM Radio
    Tecsun BCL-2000 Handheld Portable Multi Band AM FM Radio

    • The Multi band radio comes with 30MHz LPF make it free from the interference of the locate FM signal and the VHF communication signal

    Size in Detail:

    Tecsun BCL-2000 Handheld Portable Multi Band AM FM Radio

    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

    Differences Between AM and FM Receivers:

    • In an AM transmission the carrier wave is constant in frequency and varies in amplitude (strength) according to the sounds present at the microphone; in FM the carrier is constant in amplitude and varies in frequency. FM is also used in television sound systems. In both radio and television receivers, once the basic signals have been separated from the carrier wave they are fed to a loudspeaker or a display device (usually a cathode-ray tube), where they are converted into sound and visual images, respectively.

    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 Radio

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