This phaser is a version of the Tau-Pipe-Phaser project of Juergen Haible. So please see his project site for further details.
But here are some details which are "specials" of my module.
1.) Power supply
I built this phaser as a module for my Formant modular, not as a stand alone device. So I omitted the components of the power supply of the original phaser like the voltage regulators, the fat capacities and some other parts because I used the supply of my modular.
2.) Transistor arrays
I used the CA3086 array for the phase shifters. The original phaser works with the CA3046. I compared the sound of my phaser with the sound examples provided by Juergen Haible and could not hear any differences.
3.) Tempcos I did not use any temperature compensating components. They were used by Juergen's version to adapt the behaviour of the phaser (pikes and drops) according to the V/Oct characteristic (which is the basic function of the input signal also) to achive a kind of "sound tracking".
A standard resistor does this job well enough.
4.) Resonance I reduced the input resistor of the resonance stage from 220k to 180k ( a hint of Juergen Haible) to increase the resonance up to self oscillation. This provides additional interesting sound effects around this point and supports V/oct calibration via using the phaser as a VCO.
The phaser has
Board of the phaser:
please see Juerge Haibles project site for details.
see also Juergen Haibles project page