An analog amplification vacuum tube according to the present invention suppresses the influence of filament vibration on amplification characteristics. The analog amplification vacuum tube according to the present invention is provided with a filament, an anode, a grid, and a vibration-proof part. The filament is linearly laid, and emits thermoelectrons. The anode is disposed in parallel with the filament. The grid is disposed, so as to oppose the anode, between the filament and the anode. The vibration-proof part has a thin film usable in a vacuum environment, and the thin film comes into contact with a part of the filament.
展开▼
