Very low output from Knight KN928
The AF/PI (Audio Frequency/Phase Inverter) stage is a critical component in audio amplification circuits, often used in various audio applications. The absence of resistor R45 should be verified against the circuit design requirements, as it may impact the overall gain and frequency response of the stage. Resistors in this configuration typically serve to set the gain and stabilize the circuit against oscillations.
The disk capacitor bypassing R44, specified as 68nF750, plays a significant role in filtering high-frequency noise and ensuring a stable power supply for the active components in the AF/PI stage. The capacitance value of 68nF is appropriate for bypass applications, providing a low impedance path to ground for high-frequency signals, thereby improving the performance of the amplifier by reducing the effects of power supply noise.
It is essential to ensure that the components used in this stage, including R44 and the bypass capacitor, are correctly rated for the intended voltage and current levels. The tolerance of 10% should also be taken into account when selecting components to ensure that the circuit operates within the desired specifications. Proper layout and grounding techniques should be employed to minimize parasitic effects, which can adversely affect the performance of the AF/PI stage.Ty- Regarding your updated drawing of the AF/PI stage: - I don`t think R45 exists? - The disk cap bypassng R44 is labeled 68NF750 10% which I assume.. 🔗 External reference
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