"Rife" mean not one type of a machine described. As I know he used 3 types where 2 of them he made and the third was Hoyland's construction. So the word "Rife" mean a frequency machine with a plasma transmitter. Rife didn't use carrier modulation but the mixing of 2 frequencies in his second machine. Hoyland used carrier modulation with a modulation coefficient M>100%. Spooky and many other producers have a good marketing staff so You ought to filter an information.