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Variable capacitors are most commonly used to tune radio circuits. However, these devices have a vast range of applications from radio frequency dental tools to high school science classroom experiments.
A variable capacitor is made of brass or aluminum plates that can hold charges. By varying the area between these plates, the energy capacitance of the device can be easily and quickly adjusted. Different kinds of variable capacitor devices are suited to various tasks. When shopping for a variable capacitor, it is useful to know how the capacitor will be used.
Air variable capacitors may be the most common variety. These devices rely on air as an insulating medium, or dielectric. A vacuum variable capacitor, on the other hand, uses a high-suction vacuum as a dielectric. The difference is that the vacuum permits higher voltage operations and reduces energy losses, making the capacitor more stable overall. When it comes to radio frequency, however, many users prefer another model known as a high-powered variable capacitor.
If you're new to the variable capacitor market, it can help to browse various providers for a knowledgeable and reliable supplier with many options. Business.com can be a useful source of information about providers of capacitors. View the list of links on the left for more details.