HH Scott Amplifier 255S
(1973-1975)
TECHNICAL SPECIFICATIONS
American manufacturing
Power (RMS) 2X30w/8 ohms
Power (RMS) 2X40w/4 ohms
THD output: 0,5%
Power Bandwidth: 15Hz/35Khz
Intermodulation: 20Hz/25Khz
Input Sens Phono 1/2: 2,5mV
Input Sens Tuner: 150 mV
Input Sens Aux: 150 mV
Input Sens Tape In: 120mV
SNR Phono 1/2: 65dB
SNR Tuner: 75dB
SNR Tape In: 75dB
SNR Aux: 75 dB
Main Amp. Input: 850 mV
Damping Factor: 30/8 ohms
Output Imp: 4/16 ohms
Dimensions: 413x222x124 mm
Weight: 6 Kg
Schematics Owners Manual | Transistors | Equiv | Other |
| BD183 | 2N3055-BDX93 | NTE284 |
| 2SC828 | BC547 | BC639 |
| 2SC644 | BC549-BC184L | 2N3702 |
| 2SC1509 | BD139 | NTE297 |
| 2SC1667 | 2N3055-BD183 | NTE284 |
| 2SC497 | BD139-BSW66A | BC639-NTE128 |
| 2SA564 | BC640-BC418B | BC177A |
| 2SC1567 | BD139 | NTE373 |
| 2SA794 | BD140 | 2N5415S |
| 2SC1567 | BD139-2N5100 | NTE373 |
| Capacitors/µf | Tension/volts | Quantity |
| 4700 | 50 | 2 |
| 2200 | 50 | 1 |
| 220 | 6.3 | 4 |
| 100 | 35 | 2 |
| 100 | 15 | 1 |
| 100 | 6.3 | 3 |
| 47 | 35 | 2 |
| 33 | 10 | 2 |
| 10 | 25 | 12 |
| 1 | 50 | 6 |