High capacitance oscillator circuit to produce longitudinal waves
In spite of great drama around these Longitudinal waves, show me one authentic report of a measurement of a longitudinal wave.  I have done many tests with all kinds of microwave Network Analyzers and antenna and never seen or read a confirmed measurement.

I believe you can get longitudinal acoustic waves in a plasma detonation at the same time, but that's all.  Bearden et al has never produced any such evidence.

other ref: https://en.wikipedia.org/wiki/Longitudinal_wave#Electromagnetic


  Do you have any measurement specs you want to generate at all ?  



Xtals have high Q >10k for AT cut, >> 100K for SC cut
LC oscillators are have Q &lt; 200, unless precision Helix maybe 500 under pristine conditions
For high Xtal's get a fish finder transducer and couple impedance to a fluid properly


Russia's nuclear powered VLF experiments were not longitudinal but transverse like everything else.