PT-80 Delay self-oscillating

Posted on May 16th, 2009

This video was made upon request and demonstrates the PT-80 delay self-oscillating and going into feedback.

PT-80 Delay

Posted on August 17th, 2006

This is my PT-80 delay the information for this build can be found on

I used acid graphics as tutorial for etching, this was my first ever etch and worked well, one tip place the box (or PCB board) onto a hard surface instead of a soft ironing board.