Before revision: The Neutrodyne radio receiver was a particular type of tuned radio frequency (TRF) receiver, in which the instability-causing inter-electrode capacitance of the triode RF tubes is cancelled out or "neutralized".US Patent No.
After revision: , invented in 1922 by Louis Hazeltine,The Neutrodyne radio receiver was a particular type of tuned radio frequency (TRF) receiver, in which the instability-causing inter-electrode capacitance of the triode RF tubes is cancelled out or "neutralized".US Patent No.