with resonator having distributed inductance with capacitance, e.g. Pintsch tube

Full Title

Transit-time tubes, e.g. klystrons, travelling-wave tubes, magnetrons (details of transit-time tubes H01J23/00; particle accelerators H05H) > Tubes specially designed to act as oscillator with positive grid and retarding field, e.g. for Barkhausen-Kurz oscillators (with secondary emission H01J25/76) > with resonator having distributed inductance with capacitance, e.g. Pintsch tube