60W audio amplifier (2N3055)


Posted on May 9, 2012

This is a simple and low cost 60W power amplifier. The optimal supply voltage is around 50V, but this amp can work from 30 to 60V. The maximum input voltage is around 0.8 - 1V. As you can see, in this design the components have a big tolerance, so you can build it with almost any components that you can find at home. The output power transistors can be any NPN types, but do not use Darlington types. Capacitor C1 regulates the low frequencies (bass), as the capacitance grows, the low frequencies are getting louder. Capacitor C2 regulates the higher frequencies (treble), as the capacitance grows, the higher frequencies are getting quieter.


60W audio amplifier (2N3055)
Click here to download the full size of the above Circuit.

This is a class B amplifier, this means, that a current must flow through the end transistors, even if there is no signal on the input. This current can be regulated with the 500 Ohm trimmer resistor. As this current increases, the sound of the amplifier is better, but output transistors are dispatching more heat. If the current is decreased, the transistors are dispatching less heat, but the sound quality is decreased.




Leave Comment

characters left:

New Circuits

.

 


Popular Circuits

Digital Compass
Stepper Motor Speed And Direction Controller
Uhf Tv-Line Amplifier
60 watt 2n3055 power amplifier
Field-programmable Operational Transresistance Amplifier using Floating-gate MOSFETs
Protection For Telephone Line Circuit
discrete robot schematics
Battery charger circuit using LM317
Noise in Amp from LED Strip & servo
High voltage speed optocoupler and application circuit diagram



Top