The circuit shown was found in a 1994 Linear Applications Handbook by National Semiconductor. The input allows you to use a varicap to slightly change the frequency of oscillations. The FET can be the BF245.

The circuit shown was found in a 1994 Linear Applications Handbook by National Semiconductor. The input allows you to use a varicap to slightly change the frequency of oscillations. The FET can be the BF245.