Description
Precision Stereo Voltage Amplifier Module
The STK3082II is a high-performance thick-film hybrid integrated circuit from Sanyo. Unlike standard power amplifier chips, the STK3082II functions as a voltage amplification stage specifically designed to drive robust output sections delivering between 80W and 90W per channel.
Found in many classic premium receivers, this "Series II" module is engineered for high stability and low harmonic distortion, ensuring that the audio signal remains clean before it hits the final power transistors.
Key Technical Features:
- Application: Voltage amplifier driver for 80W to 90W AF power amplifiers.
- Configuration: 2-Channel Stereo (SIP-15 package).
- Low Distortion: Features a high-linearity internal architecture (typically 0.01% - 0.02% THD).
- Voltage Range: Recommended operating voltage of ±50V (Absolute Maximum ±65V).
- Integrated Protection: Excellent thermal stability and high-voltage resistance.
Technician's Note:
The STK3082II is often the primary driver for the power stage. Before installation, it is critical to verify that the final output transistors and emitter resistors are in good working order. A failure in the output stage can cause a surge that will instantly damage a new driver IC.
Installation Tip: Use a small amount of high-quality thermal compound on the backplate and ensure the device is securely mounted to its heatsink to prevent thermal drift.