150 Watt amplifier circuit
Description
This is the cheapest 150 Watt amplifier circuit you can get,I think.Based on two Darlington power transistors TIP 142 and TIP 147 ,this circuit can deliver a blasting 150 W Rms to a 4 Ohm speaker.Enough for you to get rocked?,then try out this.
TIP 147 and 142 are complementary Darlington pair transistors which can handle 5 A current and 100V ,famous for their ruggedness. Here two BC 558 transistorsQ5 and Q6 are wired as pre amplifier and TIP 142 ,TIP 147 together with TIP42 (Q1,Q2,Q3) for driving the transistors.This circuit is designed so rugged that this can be assembled even on a common board or even by pin to pin soldering.The circuit can be powered from a +/-45V 5A dual power supply.You must try this circuit.Its working great.
Circuit Diagram & Parts List .
Notes.
- Remember TIP 142 and 147 are Darlington pairs .They are shown as conventional transistors in figure for ease.So don’t get confused.Even though each of them have 2 transistors ,2 resistors and 1 diode inside ,only three pins ,base emitter and collector are coming out.Rest are connected internally.So its quite OK to assume each of them as transistor for ease.
- Use a well regulated and filtered power supply.
- Connect a 10K POT in series with the input as volume control if you need.Not shown in circuit diagram.
TIP 142 & 147 Internal diagram and pin out.
Dear Sir,
I have change the 2N3903 transistors to BC557 and is still having problem to get the output signal to the speaker.
Are these the correct transistors TIP 142, 147 and 41 and is this the correct voltage to feed the circuit 45v 5A.
All the other components used are rated according to the diagram posted on this site. I don’t want to give up at this time please help me.
I am looking forward for you urgent respond and any members who have completed this project and got through please assist me.You can contact me on my email at ajdeane03@yahoo.com
Best Wishes
Anthony
Reply to Anthony Deane
All transistors are correct. I think there is no problem with the circuit. Pls check your circuit and components.
Many guys have successfully assembled this circuit .
This is the cheapest circuit i have discovered and try it it’s pretty amazing it only costs PHP 300.00
Bought the components but no time to built yet . Have a look at this site for the PCB .
http://www.diyaudiotr.com/islecler/tammetin.php?metinid=6&durum=e#sonyorum
simplest amp assembled. few components but high power = JG
Hi
Any one have FN1016 based subwoofer amp circuits