Electronic Regulated Power Supplies

Electronic regulators can and do improve the overall sound of the Power Amplifier, by providing a very smooth ripple free DC supply to amplifier supply rails. Even at full power O/P there is very little or no ripple or variation of the voltage supplies.

The circuit board shown below is an improved version of a Ryan Power Voltage Regulator. The original design was published in Audio Amateur Magazine in the 4th quarter of 1989. In its current design it can power a Two hundred watt amplifier module without too much trouble.

I have redesigned the PCB and added decoupling to the voltage amplification stage which increases the PSRR up into 80dB range. Its previous figure was only 40dB, very poor really... I also improved the frequency compensation which previously was not good. It tended to brake into oscillation.

Also below is the original schematic. 

and the modified circuit