variable capacitor

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hey can some one point me to a direction of variable capacitors for the types of circuits we work with? pcb mount or what ever kind it is we would use on frequency generators.

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hey can some one point me to a direction of variable capacitors for the types of circuits we work with? pcb mount or what ever kind it is we would use on frequency generators.

Most of the time, we use variable resistors for that purpose or we change voltage.
Just drop the schematic and say what you want and ill help you out...


Steve

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I want to have a broad range in frequencies.... I would like to turn a knob to change frequency range below and beyond 1.8nf.Those are the values I would like to start with but I would like a whole variety pack of what ever kind of variable capacitors for other projects as well.

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or even better yet.. how would I wire up a switch and what kind of switch could I use to just  switch to a different cap? for the same effect