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    Schematics / ARP Quadra Phase Shifter

    < Paia Gator | Schematics | SMD 2040 filter >
    < 80-11 Dual Ring Modulator | Listbytype | Real Ring Modulator and Modem >


    DIY | Phase Shifter | Phaser | ARP | Paul DeRocco | Joe Lemansky | Tim Gillette | Jürgen Haible


    ARP Quadra Phase Shifter designed by Paul DeRocco, Joe Lemansky and Tim Gillette of ARP ,modified and pcb layout by Jürgen Haible ,from the notes on Jürgen's page http://www.jhaible.de/additional_schemos.html :

    In my version, as it is published here, I have replaced the differential buffer amp (which is a true piece of art in the original, using a FET pair, a BJT pair and an opamp) with an instrumentation amp made of BiFET opamps. The compander circuit, built around a CMOS transistor array, is like in the original, and it surely contributes to the specific sound. (It's discussed on my Storm Tide Flanger page.)


    < Paia Gator | Schematics | SMD 2040 filter >
    < 80-11 Dual Ring Modulator | Listbytype | Real Ring Modulator and Modem >

    Edit - History - Print - Recent Changes - Search Page last modified on 2013-02-24 16:53 [UTC-7] - 1045 views