Power Amplifier using 2N3055 circuitSimple and cheap. The optimum supply voltage is around 50V, but this amp work from 30 to 60V. The maximum input voltage is 0.8 - 1V. As you can see in this design of the components have a big tolerance, so you can build almost of the components, which are at home. The transistors and can be any NPN type power transistor, but do not use Darlington types ... The output power is around 60W.
Some comments:
- Capacitor C1 regulates the low frequencies (bass), as the capacity grows, the lower frequncies are becoming stronger.
- Capacitor C2 regulates the higher frequencies (treble), as the capacity grows, the higher frequencies are getting quieter.
- This is a class B amplifier, this means that a current must flow through the transistor effect, even if no input signal. This current can be regulated with the 500ohm, the shear strength. As this incrases current amplifier the sound gets better, but the end transistors are more heating. But if this current Decrease, transistors are not warming much, but the sound gets worse ...
