460A is an audio amplifier product by HH SCOTT at end 70s era. Its amplify and produce the audio signal until 70 Watts for 47VDC supply at 8 Ohm load.
INFO
inside of 460A amplifier:
SCHEMATIC
This is an edited schematic diagram of 460A amplifier made by SCOTT.
- Q1: 2SA798 = Preamplifier with using differential transistor.
- Q5: 2SA912= Bias driver for feed to driver amplifier.
- Q7: 2SC1885 = Voltage Amplifier Stage.
- Q9, Q11, Q13,Q15: Current Protection from Overcurrent at transistor’s Power Amplifier.
- Q17, Q19 : 2SC2238, 2SA968 = Driver Amplifier
- Q21, Q23: 2SD745, 2SB705 = Final Power Amplifier
NOTE
2SD745 able to produce until 120 W of power. Datasheets: https://datasheetspdf.com/datasheet/2SD745.html
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