Degaussing Coil

Some articles on degaussing, degaussing coil, coil:

Cathode Ray Tube - Color CRTs - Degaussing
... and computer monitors, each have a built-in degaussing (demagnetizing) circuit, the primary component of which is a degaussing coil which is mounted around the perimeter of the CRT face inside the ... Upon power-up of the CRT display, the degaussing circuit produces a brief, alternating current through the degaussing coil which smoothly decays in strength (fades out) to zero over a period ... This degaussing field is strong enough to remove shadow mask magnetization in most cases ...
Thermistor - Applications
... PTC thermistors were used as timers in the degaussing coil circuit of most CRT displays ... is initially switched on, current flows through the thermistor and degaussing coil ... The coil and thermistor are intentionally sized so that the current flow will heat the thermistor to the point that the degaussing coil shuts off in under a second ...