I think I have the design of the power supply finalized now:http://www.experimentalistsanonymous.com/ve3wwg/doku.php?id=fet_tone_ss_amp&#power_supply_schematic
I usually just wing power supply design but this project requires more care, since I am aiming for >50 Watt amplifier. A lot of details to plan on this one, some of which includes:
- Voltage planning (for caps and diode ratings)
- Power ratings on the bleed resistors (R1 and R4)
- Filter capacitor sizes (to meet ripple requirements)
- Voltage drop diodes to reduce power dissipation in +/-12V regulators
- Snubber capacitors for the rectifier diodes (to reduce RF interference)
That reminds me-- I need to also check into surge currents and power ratings.
The rectifier diodes can apparently provide some RF as they threshold into and out of conduction. This seems to be recommended on any quiet amplifier design. I have to say I really enjoyed reading the book "Audio Amplifier Design Handbook" by Douglas Self" this week (another installment in my used book collection).