Thursday, May 30, 2019

Multi-use Stereo amplifier schematic - USB/FM, Keyboard, Guitar, Line in, Line out


Used transistors are BC549, BC640C, BC556B, BC639, 2N5551, BC337, BC327, KSC340/MJE340, KSC350/MJE350, TIP41C, TIP42C
All resistors are 1/4 W and all the electrolytic capacitors are 25V, except those with indication.
The setting of 0V must be output terminals, the apparatus without load and without input signal, to approximately 0 VDC.
[The quiescent current must be measured on one of the resistors of 0.47Rx2W, the appliance is fully charged and input signal.]