How do you implement a variable capacitor these days? Mechanical caps are out. That leaves varactors, which work fine but require higher voltages that often are not available, and their response ...

Since variable capacitors that are capable of affecting a large change on the frequency of a circuit can be quite expensive he set out to find another way.

A Variable capacitor with six fixed plates and six movable plates. Arrangement of plates permits interleaving of sets of three each, so that each set reaches minimum and maximum capacity with the ...