I apologize for the simple question, but what is a good replacement for a 741 OpAmp? David David M. Ingebretsen M.S., M.E. Collision Forensics & Engineering, Inc. 2469 East Fort Union Blvd. STE 114 Salt Lake City, UT 84121 www.CFandE.com 801 733-5458 Office 801 842-5451 Cell dingebre at CFandE.com dingebre at 3dphysics.net