These are the carrier waveforms for both voltage and current.  The actual carrier frequency of the machine depends very much on the plasma tube and also on coupling effects between the tube and any person in the vicinity.

This has made it very difficult to get accurate measurements of the machine because even being in the same room as the machine causes the frequency to alter!

However, after many experiments I am reasonably certain that the resting carrier wave frequency, undisturbed by any local effects is approximately 3.33 MHz.

Because the wave is not a pure sine there are strong harmonics at many other frequencies as well.  Some of the dominant harmonics have been observed at approximately 2.3 MHz, 4.6 MHz and 9.09 MHz.

Comparison of wave from original Rife machine (top) with the waveform from the Beam Rays machine.   Note the similarities in the wave envelopes.

Effect of Modulation Depth

Wave 1  - this is one burst of the tank waveform at 1430 Hz (scope settings on uncalibrated and adjusted for better resolution) and in excess of 90% modulation depth (sine wave).

Wave 2 through Wave 4, this is what happens as the modulation depth is successively increased - Wave 4 is pretty much 100%.  The number of cycles per burst (a burst is approx 20ms apart and is set by the mains cycle) decreases with increasing modulation.

Wave 5 - as you enter overmodulation, the burst breaks up into smaller chunks.

Wave 6 - at approx 50V p-p modulation the wave is overmodulated and consists of single cycle pulses grouped into bursts.