(under subclass 11) Subject matter in which an active element is operated in such a manner that it presents the characteristics of a variable reactance to the rest of the tuned circuit.
SEE OR SEARCH CLASS
331, Oscillators,
180, for oscillators in which the variable frequency determining element consists of an active element type reactance tube.
332, Modulators,
140, and 142+ for reactance tubes in frequency modulators and 147+ for reactance tubes in phase modulators.
333, Wave Transmission Lines and Networks, 213+, for reactance tube systems, per se.
