Hi everyone! I want to make the ESP project 13 low noise amplifier with the addition of a balanced pre input.
I need some insight in the power supply design. This is what I've come up with so far. Any thoughts?
1.
Transformer (Toroidal, 22.7V & 34.6V AC taps)
2.
Two full-wave bridge rectifiers (each using four BY550 diodes)
3.
Filtering capacitors:
30V section → 4700µF, 50V
48V section → 2200µF, 63V
4.
Voltage Regulator (LM317 for 30V output)
5.
Phantom Power Switch (SPST) before the 6.8kΩ resistors
6.
Phantom Power Resistors (6.8kΩ, 1%) → XLR Pin 2 & 3
I need some insight in the power supply design. This is what I've come up with so far. Any thoughts?
1.
Transformer (Toroidal, 22.7V & 34.6V AC taps)
2.
Two full-wave bridge rectifiers (each using four BY550 diodes)
3.
Filtering capacitors:
30V section → 4700µF, 50V
48V section → 2200µF, 63V
4.
Voltage Regulator (LM317 for 30V output)
5.
Phantom Power Switch (SPST) before the 6.8kΩ resistors
6.
Phantom Power Resistors (6.8kΩ, 1%) → XLR Pin 2 & 3
