Tuning the Tank circuit and sweeping up to 40 MHz to find the harmonics. The Bifilar seams not major influenced by the capacitor, at least not like a standard LC tank circuit.
I also used high NF capacitors with no influence on the frequency response to resonance. It seams that the Bifilar coil does not participate in the dependence of capacitance. That would explain my good result in the radiant energy video with Bifilar coils where only the 1/4 wave coil was required to draw the energy.
