The circuit diagram of unregulated power supply above is designed to supply a 25 watts power amplifier based MosFet. The output voltage of this power supply is ±33VDC.
Parts list : R1:3K3 1/2W C1:10nF 1000V Polyester Capacitor C2,C3:4700µF 50V Electrolytic Capacitors C4,C5:100nF 63V Polyester D1:200V 8A Diode bridge D2:5mm. Red F1,F2:3.15A Fuses with T1:220V Primary, 25 + 25V Secondary 120VA Mains PL1:Male Mains SW1:SPST Mains switch
The circuit diagram 25 watts power amplifier based MosFet can be found here.