50W Amplifier Circuit, built based ICL8063 as power transsistor driver and 2N3055 as main power amplifier component.
50W Amplifier Circuit based ICL8063 + 2N3055 schematic diagram:
Parts List:
| R1 = 200 Ohm R2 = 200K R3 = 30K R5 = 1K R6 = 5K R7, R10 = 1 Meg R8,R9 = 0.4 Ohm/5Watt R11 = 10K Potensiometer R12,R13 = 51K R14 = 47K C1 = 100uF/35V C2 = 0.011uF C3 = 3750pF C4,C6 = 1000pF | C5,C7,C8 = 0.001uF C9 = 50pF C10 = 0.3uF C11,C12 = 10.000uF/50V U1,U2 = 741 Op Amp U3 = ICL8063 Audio Amp Transister Driver Q1 = 2N3055 NPN Power Transistor Q2 = 2N3791 PNP Power Transistor BR1 = 250 V 6 Amp Bridge Rectifier T1 = 50V Center Tapped 5 Amp Transformer S1 = SPST 3 Amp Switch S2 = DPDT Switch F1 = 2 Amp Fuse SPKR1 = 8 Ohm 50W Speaker |
Circuit Notes:
- Distortion is much less than 0.1% up to 100HZ and increases to about 1% at 20kHz.
- 50V CT transformer might be difficult to find, you may use 45V or 32V CT transformer.
- Q1 and Q2 should be use heatsinks to prevent over heating.