# The correct formula for the frequency of a kacher brovin circuit?

I was planning on building an kacher brovin circuit

Now, I know for a regular tank circuit Frequency $$\f=\frac{1}{2\pi\sqrt{L1C1}}\$$.

However I read that the frequency of a slayer exciter is using L2 and its self capacitance as the terms for the frequency formula. Which makes sense because L2 is wired to the base of the transistor.

So is that the same case for the Kacher Brovin circuit? Does the capacitor just act as a voltage boost to the inductor, with the frequency being a function of L2 and its self capacitance? What is the frequency?