Colpitts Crystal Oscillator

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  • Colpitts Crystal Oscillator
  • Useful for binning crystals
  • Design from Experimental Methods in RF Design
    • Built by others (W2AEW, IMSAIGuy, etc)
  • Runs from 7V to 16V (may go higher, didn't tempt fate
  • 15mA with 4.44 MHz crystal at 12V

Prototype

  • Cut square PCB material for raised pads
  • Build on single side Copper clad PCB material
  • Large ground plane

XTAL-Osc-5-720px.jpg

Prototype Scope Caps

  • UUT = 4.4433 MHz crystal
  • Rigol DS1054Z - 59 MHz scope (100 MHz mod)
  • UltraScope
  • Double clock
  • 8 Digits Frequency Counter shows 4.432298 MHz

XTAL-Osc-UltraScope-01.PNG

XTAL-Osc-FFT-01.PNG

W2AEW Video

  • Wes Haywood EMIRFD cirvuit

XTAL-Osc.PNG

XTAL-Osc-2.PNG

XTAL-Osc-3.PNG

PCB

CP-OSC-3D-3.png

Assembly Sheet

Colpitts XTAL Oscillator Rev 1 Assembly Sheet

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