The Power supply Circuit at show this pillar circuit that apply to OCL Power Amplifier. The general usually already pillar circuit is will like, prevent except the value of the equipment that uses may choose follow the suitability , such as the size of transformer,the diode and the capacitors. The model PCB that show keep design for condensers model number standing on the top line the value about 4700uF 50V and might can use topmost arrive at 10000uF 60V, If we want the value condensers many this more , might can by the tow condensers parallel prevent reach loud dashed line in the circuit that shows to keep. The value is output voltage approximately get equal to Vo = 1.414 x Vac , such as Voltage at secondary coil = 24V-0-24V get DC volt output = 1.414 x 24 = 34V.