Old school Phaser (there's not much Phasers here...). Around 800$ used when they appear on eBay... PCB: http://data.over-blog-kiwi.com/1/50/80/08/20171206/ob_c11cd4_pcb-avec-composants.pdf http://www.crazy-patroche.com/2017/12/clonage-du-chorus-boss-ce-1-et-du-phaser-roland-ap-7.html...
forum.pedalpcb.com