so i built the attached circuit and i have a couple questions about it.

1. what determines the oscilating frequency? is it the capacitor or is it based off the feedback winding?

2. not all flybacks are the same. if i were to calcualte the resonant capacitor based off the oscilating frequency and the inductance of the 7+7 turns, would i measure inductance from all 14 turns or just 7 turns?

3.im a little bit confused, if the frequency changes with capacitance, then the only constant i have is the inductance of the primary.

4. what would the optimum frequency be then? then i can calculate the proper capacitor

 

Frequency of oscillation depends very much on the characteristics of the transformer core.