Peter wrote: > The OP required low impedance drive I don't remember any such spec. He only said he wanted to drive the line input of a tape player. That wouldn't be less than 600 ohms, and could easily be much more depending on the player. ******************************************************************** Embed Inc, Littleton Massachusetts, http://www.embedinc.com/products (978) 742-9014. Gold level PIC consultants since 2000. -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist