Capacitors are circuit devices for storing electric energy. Variable capacitors are mainly used in filter circuits and power supplies. They are used in a variety of appliances.
A trimmer capacitor is a semi-adjustable capacitor placed across a variable tuning capacitor and pre-set to allow the main capacitor to track correctly with another variable capacitor on the same shaft. The adjustment takes out any differences introduced by the connected circuit.
There are several photos of variable capacitors on this site: www.orenelliottproducts.com
An air variable capacitor might have a range of a few picofarads (high voltage units) to several hundred picofarads (in an old AM radio).
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Yes you can. But the variable one is used so that you can very the frequency and it cant be varied anymore if you use a fixed capacitor.
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A trimmer capacitor is a semi-adjustable capacitor placed across a variable tuning capacitor and pre-set to allow the main capacitor to track correctly with another variable capacitor on the same shaft. The adjustment takes out any differences introduced by the connected circuit.
There are several photos of variable capacitors on this site: www.orenelliottproducts.com
An air variable capacitor might have a range of a few picofarads (high voltage units) to several hundred picofarads (in an old AM radio).
In radios that aren't solid state, and use variable capacitors for tuning, the air-dielectric variable capacitor is the almost universal choice for radio frequency applications. More information on air variable capacitors is available at www.orenelliottproducts.com.
varactor diode is a correct answer
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A variable capacitor is an electronic subcomponent that allows the user to tune the device to various capacitances within its range. For example, an air-dielectric variable capacitor with a range of between 5pF and 100pF could be tuned by rotating its shaft, and would contribute anywhere between 5pF and 100pF of capacitance depending upon the angle of the shaft. More information on variable capacitors is available at: www.orenelliottproducts.com
A variable capacitor is an electronic subcomponent that allows the user to tune the device to various capacitances within its range. For example, an air-dielectric variable capacitor with a range of between 5pF and 100pF could be tuned by rotating its shaft, and would contribute anywhere between 5pF and 100pF of capacitance depending upon the angle of the shaft. More information on variable capacitors is available at: www.orenelliottproducts.com
Yes you can. But the variable one is used so that you can very the frequency and it cant be varied anymore if you use a fixed capacitor.