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Amplifier of Acoustic Frequencies with Preamplifier
- Kyriakos Kontakos
- kkontak@hotmail.com
- 11.286 Views
- moderate
- Non tested
- 0 Likes
Characteristics
- Input Voltage: 15V
- Output Power: 4,2Wrms @ 4Ohm
- Minimal input signal: 94mVp-p with preamplifier, 0,65Vp-p without the preamplifier
Parts
| R1 | 2,2K |
| R2 | 330K |
| R3 | 4,7K – logarithmic potentiometer |
| R4 | 330K |
| R5 | 1K |
| R6 | 1.5Ohm |
| C1, C6 | 100nF polyester |
| C2 | 100uF/25V electrolytic |
| C3, C7 | 1uF/25V electrolytic |
| C4 | 1000uF/25V electrolytic |
| C5 | 10uF/25V electrolytic |
| Q1 | BC547 |
| U1 | TDA2002 |
| LS1 | speaker |
Notes
Output power related to speaker impedance
| LS1 | Output Power |
| 2Ω | 6,5 Wrms |
| 4Ω | 4,2 Wrms |
| 6Ω | 3 Wrms |
| 8Ω | 2,25 Wrms |
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