Search for: Your Source for DIY Pedal PCBs and NostalgiTone! › GuitarPCB Forum › Topic Tag: first build ; Ratt Deluxe ; high whistle Viewing topic 1 (of 1 total) Topic Voices Posts Last Post Ratt Deluxe, whistle when engaged (solved) Started by: Anonymous in: GuitarPCB Build Support 2 7 2 years, 4 months ago Anonymous Viewing topic 1 (of 1 total)