| Manufacturer | Part Number | Description |
|---|---|---|
| STK4352 | AF Power Amplifier | |
| Unknown Manufacturer | STK435 | (STK433 / STK436 / STK437 / STK439) THICK FILM HYBRID IC |
SANYO (now Panasonic) |
STK435A | Single Power Supply / 2Ch Amplifier |
| Unknown Manufacturer | STK435-xxx | (STK4xx) 2-Channel 5 to AF Power Amp |