Sunday, August 5, 2012

50 Watt Amplifier

This is a handy, easy to build general purpose 50 watt amp. The amp has an input for a radio, TV, stereo or other line level device. It also has a phono input for a record player, guitar, microphone or other un-amplified source. With the addition of a low pass filter at the input, it makes a great amp for a small sub-woofer. 

Schematic Diagram:


List of Components:

R1­­­_____ 200 Ohm 1/4 W Resistor

 R2_____200K 1/4 W Resistor
R3_____30K 1/4 W Resistor
 R5_____1K 1/4 W Resistor
R6_____5K 1/4 W Resistor
R7, R10_____1Meg (5%) 1/2 W Resistor
 R8, R9_____0.4 Ohm 5 W Resistor
 R11_____10K Pot
R12, R13_____51K 1/4 W Resistor
 R14_____47K 1/4 W Resistor
C1_____100uF 35V Electrolytic Capacitor
C2_____0.011uF Capacitor
C3_____3750pF Capacitor
C4,C6_____1000pF Capacitor
C5,C7,C8_____0.001uF Capacitor
 C9______50pF Capacitor
C10_____0.3uF Capacitor
C11,C12_____10,000uF 50V Electrolytic Capacitor
U1,U2_____741 Op Amp
U3_____ICL8063 Audio Amp Transister Driver thingy
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
MISC_____Case, Knobs, Line Cord, Binding Posts Or Phono Plugs (For Input And Output), Heatsinks For Q1 And Q2


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