Pin Details of IC HA 1125
Substitute
CA3065 , AN241 , TA7176 ,KA2101 ,LA1365 , LM3065 , MC1358 , ULN2165
Functions :
Sound amplifier limiter,Low pass filter,FM detector and AF amplifier.
| Pin No. | Function | Voltage |
| 1. | Sound IF input (5.5 MHz. Inter carrier sound) | 1.9 |
| 2. | Sound IF input (5.5 MHz. Inter carrier sound) | 1.9 |
| 3. | Sound IF ground | 0 |
| 4. | Ground (-Ve supply voltage ) | 0 |
| 5. | Positive (+Ve supply voltage ) | 11.1 |
| 6. | DC volume control (electronic attenuator) | 1.5 |
| 7. | De-emphasis | 6.6 |
| 8. | Audio signal output | 5.9 |
| 9. | FM Detector | 4 |
| 10. | FM Detector | 4 |
| 11. | Not Connected | NC |
| 12. | Audio out from driver section | 4.8 |
| 13. | Tone control | 5.4 |
| 14. | Input from audio driver section | 0.6 |
