OCL power amplifier kit for a typical OCL circuit, the circuit uses direct coupling, low frequency response is good; the input stage differential amplification, low noise; output stage uses a Darlington, high gain, high power, low distortion; This circuit is particularly suitable for the production of household amplifier and active speakers amplifier circuit with good results.

 

OCL power amplifier kit for the two-channel, two-channel circuit exactly the same principle to the right (R) channel, for example, the circuit Q1, Q3 of the differential amplifier input stage, Q5 is the incentive level, Q7 and Q11, Q7 and Q11 composition of the composite complementary output stage, the output signal from the emitter of Q11 and Q13 collector removed, the audio signal output can be directly promote the speaker's voice loud and clear. The circuit also increases R25, R27, C11, C13, used to reduce static noise.

 

OCL power amplifier kit used transformer (T) to the center tap of the dual power transformer primary voltage is AC220V, secondary to two AC12-15V, power 8-100W (may need to decide), the kit does not contain transformer , buyers need to buy another.

 

Output power: Po = 25W + 25W (RL = 4Ω, transformer power 100W)

 

Output Impedance: 4-8 Ω.

 

PCB board size: 70X190mm