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Clapp Oscillator Circuit

Question asked by Cheri99 on Feb 10, 2016
Latest reply on Feb 11, 2016 by dmercer

I am trying to replicate this Clapp oscillator circuit

https://wiki.analog.com/university/courses/electronics/comms-lab-clapp-osc

with surface mount parts. I built the circuit and am not able to get it to oscillate.  I notice that in my SPICE simulations, the circuit is very sensitive to the parallel resistance of the tuning inductor, L1 - below a parallel resistance of 2K, it will oscillate!  Does anyone have any experience building this circuit or similar oscillator circuits that could offer me some tips?  I would really appreciate it.

Thank you.

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