(Reposted (and in Tina Desktop) because I did not know if the other area got much traffic).

Frustrated here. In Tina 9.3.80.276 CV, an exact and simple Colpitts oscillator circuit shown on the wikipedia page below does not work (simulate or oscillate).

Please help. The simple wikipedia circuit does not simulate at:

http://en.wikipedia.org/wiki/Colpitts_oscillatorsee figure 3. (

http://en.wikipedia.org/wiki/Colpitts_oscillator#mediaviewer/File:NPN_Colpitts_oscillator_collector_coil.svg )

Circuit does not simulate (oscillate) even when I do Analysis->transient and set the options "zero initial values" or "use initial conditions". It almost did not work for "find operating point" but it did finally give SOME result only for "find operating point" when I change the analysis parameter "maximum Step time" to small value of 100p. However I do not trust the result because "initial conditions" and "zero initial values" still does not work.

So:

"find operating point" -> untrusted but some simulation output

"zero initial values" -> no work!

"use initial conditions" -> no work!

So is Wikipedia wrong?

Tina Wrong?

Something else I am missing?

Please help.

Thanks