A simpler design than the Bi-phase, it included only rate and depth controls. The Phasor II introduced additional functionality brought over from the Bi-Phase, as a kind of scaled-down version.
6 Stage phasor
The Mu-tron Phasor has two controls (depth and rate) and uses "transconductance amps".
The Phasor II has three controls (depth, rate, and feedback) and uses "electro-optical phase control".
Vintage Musitronics MUTRON II PHASOR guitar effects phase pedal demo
