On Mon, 12 Apr 2010 00:36:16 -0500, Hal Murray wrote: > There was an article in the HP Journal on the Z3801A. I have not been able to find the issue at http://www.hpl.hp.com/hpjournal/pdfs/IssuePDFs/hpjindex.html Do someone have a pointer? or a service manual with full circuit schema if trees grows into heaven. /hjj