neutrodynen.

1923 Wireless World 21 Apr. 68/2 Professor L. A. Hazeltine has designed receivers in which the valve capacity coupling is neutralised. The capacity coupling is neutralised with the aid of fixed condensers, and the receivers are called by him ‘Neutrodyne’ receivers.

1924 J. A. Moyer & J. F. Wostrel Pract. Radio viii. 124 The neutrodyne works best on an antenna but may be used on a loop.

1936 R. S. Glasgow Princ. Radio Engin. ix. 256 The neutrodyne circuit was used quite extensively in broadcast receiving sets prior to the general introduction of screen-grid tubes in 1929.

1943 F. E. Terman Radio Engineers' Handbk. v. 469 It can be thought of as a form of neutrodyne that takes advantage of the fact that the voltages on the two sides of a push-pull amplifier are of opposite polarity, thus giving the phase relations required for neutralizing.

1964 A. A. Ghirardi & J. E. Dines Radio & Television Receiver Circuitry (rev. ed.) iii. 79 A modification of the famous Hazeltine ‘neutrodyne’ circuit is perhaps the most widely used in commercial receivers that employ triodes.

1993 IEEE Antennas & Propagation Mag. Dec. 29/1 Antennas for radio reception were normally outdoor, inverted-L and -T structures which worked well with crystal, regenerative, and neutrodyne receivers.

1924 Mod. Wireless 2 590/3 The reaction is controlled entirely by this neutrodyning condenser.

1926 R. W. Hutchinson First Course Wireless 217 Several methods have been devised for the control of this oscillation; neutrodyning, as it is termed, is one of the best.

1943 C. L. Boltz Basic Radio xiv. 226 This [instability] was decreased by using condensers to provide negative feed-back to nullify the positive feed-back. These were called neutralizing condensers, and the process was one of neutralization or neutrodyning.