In regard to class A single ended transformer coupled amplifier the following statements are made:
1. The d.c. current flowing through primary causes considerable dissipation of power.
2. The output a.c. power obtained is the same as in the series fed directly coupled load for a given transistor dissipation capability.
3. In the presence of a signal, the transistor dissipation is less than in the case of direct coupled load.
4. The drain on the power supply is ideally one-half of what it is in direct coupled amplifier.
Of these four statements, the true ones are: