2N4416 JFET is suitable for smooth circuit oscillation with very low harmonic distortion. JFET local oscillator is very good on application where low harmonic content is required for a good mixer circuit. Here is the schematic and the values of the oscillator :

Low Distortion Oscillator Circuit Schematic Diagram

Low Distortion Oscillator Circuit Schematic Diagram

  • C1 = 700 pF L1 = 1.3 mH
  • C2 = 75 pF L2 = 10T  3/8?  DIA  3/4?  LONG
  • VDD = 16V ID = 1 mA

20 MHz OSCILLATOR PERFORMANCE

  • LOW DISTORTION 20 MHz OSC.
  • 2ND HARMONIC -60 dB
  • 3RD HARMONIC > -70 dB