Microphone Preamp Power Supply
Post date: Sep 26, 2009 10:53:9 AM
Here is a simple PSU to power a microphone pre amp. It will supply +15v, Â -15v & 48v. If a 7818/7918 pair of regulators is used, then the PSU will supply (surprise) +18v, -18v & 48v. The un-marked diode near C14 is a 1N4003 or better.