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KW 109 High power version of KW 107; KW 110 Q multiplier; KW 160 transmitter NB KW 160 was also the designation for a 160-meter Aerial Matching Unit. KW 201 receiver; KW 202 receiver; KW 204 transmitter; KW 600 linear amplifier [9] KW 1000 linear amplifier [10] KW 2000 transceiver [11] KW 2000A transceiver [12] KW 2000B transceiver [13] KW ...
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 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 .
A klystron is a specialized linear-beam vacuum tube, invented in 1937 by American electrical engineers Russell and Sigurd Varian, [1] which is used as an amplifier for high radio frequencies, from UHF up into the microwave range.
20 W audio power amplifier (up to 90 dB gain) [45] LM1876 Dual 20 W audio power amplifier with Mute and Standby Modes (up to 90 dB gain) [46] LM386: Low voltage audio power amplifier [47] LM389 Yes Low voltage audio power amplifier (same as LM386) with 3 NPN transistors LM3875: Yes High-performance 56 W audio power amplifier [48] LM3886 High ...
In RF linear Power Amplifiers, such as cellular base stations and broadcast transmitters, special design techniques can be used to improve efficiency. Doherty designs, which use a second output stage as a "peak" amplifier, can lift efficiency from the typical 15% up to 30-35% in a narrow bandwidth.