frequency

Hi, how do I increase the frequency I mean not double it but increase it about 300% or more

The several ways are: 1. distort the signal to produce harmonics, then tune to the desired harmonic. 2. Mix the signal in a non-linear device with another frequency. This produces sum and difference frequencies, you can then tune to the sum. 3. Use a PLL to generate the frequency and a frequency divider to use the base frequency as reference.