Dog,Suggest you just replace C561 in T503. It's got B+ on it and I have an x over it on one of my schematics and that's how I denote what has fixed a problem in the past. Rich wd2q In a message dated 10/27/2018 6:21:14 PM Eastern Standard Time, r-390-request at mailman.qth.net writes: https://drive.google.com/drive/my-drive