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In electronics, an antenna amplifier (also: aerial amplifier or booster) is a device that amplifies an antenna signal, usually into an output with the same impedance as the input impedance. Typically 75 ohm for coaxial cable and 300 ohm for twin-lead cable. An antenna amplifier boosts a radio signal considerably for devices that receive radio ...
The automatic kind will also lower when the ignition switch is turned off. Unlike most car antennas adjusted directly by hand, power antennas retract completely beneath the surface that they are mounted on. This convenience could be found on most luxury cars by the late-1950s. The automatic power antenna became much more common in the 1970s. [1]
VLF-HF active antennas: Part 3. These short-length antennas are easy to build and offer surprisingly good performance. R. W. Burhans: 54/4: April 1983 Spot-a-matic: An illuminating project. Robert Grossblatt: 54/4: April 1983 Talking alarm clock: Only a few IC's are needed to build a clock that really tells time. Lee Glinski: 54/5: May 1983 Car ...
A regular roundup of the best in automotive gear and products, chosen and put to work by the staff of Hearst Autos. Car Gear We Use: Garage Space Savers, Battery Boosters, and a Must-Have Tool ...
Since a traditional car phone uses a high-power transmitter and external antenna, it is ideal for rural or undeveloped areas where mobile handsets may not work well or at all. However, due to current US Federal Communications Commission regulations, carriers must pay penalties for activating any equipment that is not an E911 compliant device ...
Some head units have built-in stereo amplifiers. Other car audio systems use a separate stand-alone amplifier. Every amplifier has a rated power level sometimes noted on the head unit with the built-in amplifier, or on the label of a stand-alone unit. Coaxial speakers: These are the most common type of car speakers and are often factory-installed.