The diode is used to show the basic thermionic effects in vacuum tubes, including:
Current flow between an incandescent filament and a cold electrode (the Edison effect). Determination of e/m by the displacement method using Helmholtz coils.
Characteristic anode current/anode voltage curves for different filament temperatures.
Application of a diode as a rectifier.
The diode consists of a basic glass spherical body with a cylindrical neck, containing a tungsten filament with 4mm connections sockets in the plastic cap on the neck and a circular anode plate connected to a 4mm plug connection on the sphere.
? Optimum anode voltage: 500V.
? Maximum anode current: 5mA.
? Maximum filament voltage: 7.5V.
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