>If I recall....carbon film is a better choice in high >voltage applications, less chance of arcing? That >thought was from a design I worked on some 10 years ago, >where the application was high voltage RF, and the >guy doing the design specifically put in carbon Had that in Cockroft-Walton (sp?) multipliers for instruments in space. carbon resistors specified for arc-over reasons. -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist