Sorry, I forgot which thread this subject was originally discussed on. He had a sealed glass sample tube - around one inch by three or four inches - of USP grade Hydrogen. He had an rf Helicon coil wrapped around the tube, and energy from this coil converted the internal gas into plasma. This had a bright red appearance. During the several minutes of operation, the color gradually changed to purple (red plus blue), which indicated the formation, and presence of, Helium, inside the sealed tube. He said this was due to spontaneous fusing of H into He. And this happened because he had a second coil loosely wrapped around the outside of everything else, with this coil resonating at a specific frequency. The fact that this secondary tank circuit would 'ground' the fusion energy is what allowed the reaction to occur.
He also said that he was informed during an official visit that he had stumbled onto a state secret. (In England). He did not say he was ordered to not talk about it.
During our entire discussion at the private group, he never would say what the extraction frequency is, but this might be deduced by examining his equipment. The outer pick-up coil's inductance would be easy to estimate, but the tank's capacitor was around 10" in diameter, with a vacuum dielectric, and a large number of plates. So what was it's value? He wouldn't say.
In my opinion, his demonstration proved that fusion isotopes can form spontaneously when the right frequency of energy is EXTRACTED from a plasma, rather than input. So the only input which is needed is for ionization.