A lesson learned in servicing hundreds of amplifiers for Muzak: Change all= the electrolytics. Number of service calls dropped precipitously. Between that little trick and the application of Cramolin (Deoxit) to the p= hone systems that we maintained, when I left that job, it was like the prov= erbial Maytag repairman. --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .