What is the frequency range of ground wave propagation?
The ground wave is the preferred propagation type for long distance communication using frequencies below 3 MHz (the earth behaves as a conductor for all frequencies below 5 MHz). The ground wave is also used for short distance communications using frequencies between 3 and 30 MHz.
How far can a CB radio talk?
Between two base stations, you could have a range of about 20 miles. A well-installed system should provide about a 15-mile or more range. If you’re contacting a mobile CB station, you may have a range of ten miles or so.
What are the three components of the ground wave?
We can divide the ground wave into three components: the surface wave, for which the earth’s surface serves as a wave conductor; the direct wave, which is the straightest and the shortest propagation distance between the transmitter and receiver; and the earth reflected wave, in which the wave first hits the earth …
What is a dead key on a CB radio?
Short and simple. Dead Key is a carrier. It is a signal you put out when you key your radio and do NOT modulate.
Do police use CB radios?
The CB devotee especially listens to Channel 9, the emergency CB channel commonly used by motorists in trouble. However, police do respond to telephone calls from CB-listeners who hear calls for help, and they still say that someone in trouble should try to get help on Channel 9 if they have a CB.
How many miles of range can I get with a CB radio?
However, a properly installed base antenna can usually provided at least 15 miles of range and often significantly more. Due to their unique construction, no-ground plane antennas have about 70% the range of standard ground-based antennas of the same length. Visit our Learning Center for more CB Radio How-To’s and Buying Guides.
What’s the maximum wattage for a CB radio?
The main variables affecting range are as follows: The FCC allows a maximum of 4 watts of output power for CB radios to avoid signal interference with other devices, such as TV and emergency communication radios.
How big is the antenna on a CB radio?
Listed ranges assume the magnetic antenna is mounted directly on the center of the roof, the best location for mounting any CB antenna. 3′ Length: 2 to 4 miles 4′ Length: 3 to 5 miles 5′ Length: 5 to 7 miles
What can reduce the range of a CB radio?
Mount Location: Mounting location plays a large role as well. The higher an antenna is mounted, the better the range. If a poor mounting location is selected, this can dramatically cut the range to a fraction of its potential.