I've got a lady bringing in one of these PA amps sometime tomorrow, and she needs it back by Saturday for a job they have. The symptoms are 60Hz hum after it warms up (which can't be turned down), and chirps/squeals sometimes when they turn it on. I'm 99.9% sure I'll find some bad electrolytics, but would anyone have a schematic for this just for standby backup? I've searched around on the web and have not found anything. Thanks, Art Bevilacqua Essex Radio and TV 40 Main Street Essex, MA 01929 ----------------------------------------------------------------------------- Lost Password: http://www.tech-assist.org and select "Login Problems?". Email Archives: //www.freelists.org/archives/techassist/