100MHz Varicap Oscillator

This is a 100MHz Varicap Oscillator circuit. This circuit can provide modulation signals less than 28V and frequency deviation of 28 MHz peak-to-peak. This circuit uses two variable-capacitance diodes which is connected to d-c bias and audio modulating signals in parallel connection and connected in series to r-f. Here is the circuit:

[Circuit’s schematic diagram source: seekic.com]