To lower the resonant frequency of the coil you could wind it longer or put another coil in-line
with the spiral to lower the resonant frequency. The other way is to increase capacitance which has its own issues.
Here is
a very useful calculator page that allows you to calculate the resonant frequency using a few parameters. Instead of searching for
it you could set the frequency to whatever you wanted it to be. Considering that this electrical engineering at its core there are tons
of Math equations that have already been invented that will give you every answer about a coil circuit before you even build it. I know
that we are looking for anomalies but for a simple flat spiral coil there is nothing out of the ordinary they can do.
The question you should be asking yourself is "What am I trying to accomplish?". If it is to create free energy, you will
have no choice but to critically think about where the extra energy will come from because whatever energy you put
into it you will never get it back out due to resistance, capacitor dielectric leakage, self inductance etc...
If your goal is to create longitudinal waves then you are chasing rabbits because longitudinal waves in space do
not exist. They must travel down at least one wire to propagate. Tesla pumped energy into the ground and like
an in compressible fluid such as water into a balloon, it automatically squirts out wherever on the balloon there
is a hole aka another tuned circuit. Tesla never created free energy with his transmitter he said that there is always
losses and to get the energy required to utilize the transmitter he wanted to hook them up to hydroelectric facilities
and transmit the energy everywhere without using cables.
There was another grand scheme Tesla had and that was to illuminate the skies above the oceans so they
could see at night by sending huge amounts of energy into the ionosphere via a high voltage generator and huge arc
lamps that would create a channel of ionized particles in which to send the high voltage through up to the
upper atmosphere where it would create a aurora borealis effect. He would eventually come to the
conclusion that only a charged beam of particles sent through a open vacuum tube would be the answer to
the energy dissipation over a distance that came with using the arc lamps. But this scheme was separate.
from his transmitter of energy through the ground.
Now to the part that Meyl has shown is imo Electrostatic field induction. It is the exact same mechanism
as the electromagnetic field is but using a different medium such as the constantly moving particles of air of our
dielectric atmosphere.
So the question that really needs to be answered
is "In what form of energy do I want to tap into?". Now that is a question that all of us have to answer for ourselves
and follow through to a complete resolution by researching what work has already been done on the subject and
using the research as a stepping stone to reach our goal, then apply what we learn to create an experiment that
will succeed, otherwise we will all hopelessly chase our tails going from one FE experiment to another without
any success until we finally give up and have nothing to show for it.