I set up an amplifier whose power source uses a large transformer. During operation the transformer becomes very hot. This is normal?
The heating of power transformers, especially in power supplies is normal. Part of the energy involved in the transfer process is lost in the form of heat due to several factors such as eddy currents occurring in the core plates. However, heating should never be excessive as it can cause damage to the enamel coating of the wires or plastic from the terminals and other parts that can melt. Thus, heating to the point where we can get our hands on the component without burning ourselves is tolerable. Above this, the overheating can be indicative if it overloads as an excess of current or even a transformer poorly sized for the load it must feed.
