




Syllabus Sections: Temperature Effects 3m.1 1 Recall that temperature has an effect on the value of components. Those with negative coefficients will reduce in value as temperature rises whereas those with positive coefficients will increase in value. Understand the effect this will have on tuned circuits and remedial measures.
All components that are passing current have an associated heating problem. The design of the component will have a effect as to how great or small the heating effect affects the component. The component must be chosen to operate at the level of heat being generated by itself or nearby components. Coefficients of heating Components with a negative coefficients will reduce in value as temperature rises whereas those with positive coefficients will increase in value. The design of the associated circuit will have to take into account these changes and where possible balance out a positive with a negative so that changes are minimal. If the component is designed to operate at a higher than ambient temperature (ie the normal temperature of its surrounding) then few problems should occur.






