Thank you.waht said:Just connect in parallel another variable capacitor you can tune with a screw driver.
The capacitance of a cylindrical capacitor can be determined by the formula C = 2πε₀l / ln(b/a), where ε₀ is the permittivity of free space, l is the length of the capacitor, and a and b are the inner and outer radii, respectively. This formula takes into account the geometry of the cylindrical capacitor and the dielectric material between the plates.
The capacitance of a cylindrical capacitor is affected by the size and shape of the capacitor, the distance between the plates, the type and thickness of the dielectric material, and the presence of any other conductive materials in the vicinity. These factors can all affect the electric field strength and thus the capacitance of the capacitor.
The capacitance of a cylindrical capacitor can be increased by increasing the surface area of the plates, decreasing the distance between the plates, using a higher permittivity dielectric material, or adding additional conductive materials to the vicinity of the capacitor. These changes will increase the electric field strength and therefore the capacitance of the capacitor.
Fine tuning a cylindrical capacitor involves making small adjustments to the size or shape of the capacitor in order to achieve a specific capacitance value. This is often done in electronic circuits to ensure that the desired capacitance is achieved for proper functioning of the circuit.
Cylindrical capacitors have a variety of applications, including in electronic circuits, energy storage devices, and high voltage equipment. They are also commonly used in sensors, filters, and power supply units. Cylindrical capacitors are also used in medical devices such as pacemakers and defibrillators.