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A linear amplifier is an electronic circuit whose output is proportional to its input, but capable of delivering more power into a load. The term usually refers to a type of radio-frequency (RF) power amplifier , some of which have output power measured in kilowatts , and are used in amateur radio .
A valve RF amplifier (UK and Aus.) or tube amplifier is a device for electrically amplifying the power of an electrical radio frequency signal. Low to medium power valve amplifiers for frequencies below the microwaves were largely replaced by solid state amplifiers during the 1960s and 1970s, initially for receivers and low power stages of ...
In an effort to combat Citizens band radio interference with television and radio signals, the FCC enacted regulations on the production and sale of linear amplifiers. The FCC justified these regulations in accordance with its mission to "prevent interference between stations". [1] The number of CB operators had grown drastically since the 1970s.
Along with transceivers and separates, the 4-Line included a set of matching accessories including the L-4 linear amplifier, C-4 control console, W-4 and WV-4 power meters, transmit and receive converters for the 50 MHz (6 meter) and 144 MHz (2 meter) bands, and antenna impedance matching networks , the MN-4 and MN-2000.
A radio-frequency power amplifier (RF power amplifier) is a type of electronic amplifier that converts a low-power radio-frequency (RF) signal into a higher-power signal. [1] Typically, RF power amplifiers are used in the final stage of a radio transmitter , their output driving the antenna .
In 2017 Elecraft introduced the KPA1500, a 1500 watt (full legal limit) amplifier. The KPA1500 covers the 160 through 6 meter bands. Its key feature is a built-in wide-range antenna tuning unit (ATU). The amplifier's power supply is housed in a separate enclosure, resulting in a relatively compact RF deck/control unit.
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