Question about Cobra 29 LTD CB Radio
When you talk into the microphone your voice which is sound pressure is converted to electrical voltages then it is increased in power to about half of the power of what the CB will sen out to the antenna. To make the CB radio transmit, there is a circuit that creates the proper frequency or channel. It is then increased to about twice the power of the voice circuit. They are combined together just before it goes into the antenna.It leaves the radio and goes into the antenna where it leaves the antenna as an electromagnetic wave. Electricity in the air with a certain value of frequency and strength. When the CB receives, The antenna picks up a signal, an electromagnetic wave, as it passes by. The electromagnetic wave, which is a small voltage, with a certain frequency and strength, enters the radio where it is processed . It is then increased in power . It is now connected to a speaker. The speaker is also a converter. It converts electrical voltage back to sound pressure so we can hear it. As the electrical voltages make the cone of the speaker move in and out. There is a lot more detail than this but this should help. Many things happen inside the radio that cant be explained in a few paragraphs.
Posted on Dec 13, 2011
It is a simple transmission between magnetic wave forms exchanged by two consistent receivers using the sam frequency and modulation. For example, when you key in on a CB microphone, the CB is sending electronic pulses to the mic and when you talk, the waves are sent to the CB and transformed into radio waves by the transmitter and are sent to other components of the CB like if you had an echo board on the CB, if you had the echo activated, the wave would pass through the echo board and would be transformed dramatically depending on how you set the echo, then after the transformation of the waves, they would be sent through your antenna, through the air and then into other people's CB receivers.
Hope this helps!
Posted on Jul 01, 2008
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