Inductive output tube tuning arrangement

摘要

An inductive output tube includes a capacitative tuner in the form of a plunger which is moveable inside the integral output cavity of the inductive output tube so as to vary the capacitance between an input and output drift tube and hence the resonant frequency of the output stage. The tuning plunger is moveable by protruding through a wall of the vacuum envelope of the output cavity, so as to allow the capacitance to be changed by operation of the tuning plunger by manual or automatic means from outside the cavity.