Cloning the Venerable Maestro PS-1A

The early 1970's saw an explosion of effects pedals with many well-regarded units making their debut. One of these was the Maestro PS-1 and PS-1A phasers, or more technically it was called a "phase shifter." I had a friend request one, and I figured it would be an entertaining challenge. Fortunately Lectric-FX has recently released the Altered State Phaser. This is not an exact clone of the original, rather it is a bit more user-friendly version of the original effect with some modern modifications. The effect now runs off of a normal 9V power supply, which still providing the effect the +/-12V it needs to function properly. There are also changes to the buffer, op amps, as well as a few optional modifications to the circuit.