(under subclass 158) Subject matter wherein the oscillator includes at least two active elements as necessary elements of the oscillator circuit. By way of example, crystal oscillators with push-pull connected tubes are in this subclass.
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45, for oscillators having a polyphase output and utilizing two or more tubes as active elements thereof.
100, for push-pull oscillators with parallel wire resonator.
102, for push-pull oscillators with coaxial line resonator.
114, for push-pull oscillators utilizing two or more transistors. 130, for relaxation oscillators utilizing plural gas tubes.
144, for multivibrators utilizing plural tubes.
168+, for LC oscillators in general utilizing plural tubes.
