The detected "eloptic" signals were fed to a three-stage vacuum tube RF amplifier and conducted to a flat touch plate surrounded by a copper wire bifilar coil.
[7] Hieronymus subsequently designed solid-state versions of his Analyzers, substituting germanium transistors for crystal prisms and tunable capacitors for the rotating armature.
The theory of operation on which Hieronymus Machines are based is that all matter emits a kind of "radiation" that is not electromagnetic, but exhibits some of the characteristics of both light and electricity.
A series of correspondences between the two men show that while Hieronymus was sure that someday his theories of eloptic energy would be proven and accepted by physical scientists, Campbell was convinced that the machines were based on psionics, related to the user's paranormal or ESP powers.
The energy flowed over the lines of this drawing because India ink is conducting, but it isn't worth a tinker's damn for serious research or actual treating.