Phase 90 Schematic. This is a classic phase shifter. The resistor to change the level is the 150k which connects between the collector and base of the pnp transistor.
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The circuit is designed around a phase shifting stage with an input buffer to avoid tone sucking. Mxr script phase 90. This is a classic phase shifter.
A great sounding phase shifter used by the likes of eddie van halen unchained and many others.
120k to reduce gain 180k to. 120k to reduce gain 180k to. It was designed before dual op amps were really affordable so it used 6 op amps in addition to 4 jfets and a pnp silicon transistor. The mxr phase 90 schematic can be broken down into 5 simpler blocks.
