John, I haven't looked at the current ebay listings but I've noticed in the past that, by far, the vast majority of 7475As listed are the RS232 variety, not the HPIB/GPIB variety. About a year ago I had nearly a dozen of these things stacked up like cordwood in my garage. Most of them found their way to a local school. Dave John Ferrell wrote: > It must be a big manual to command $40 per copy! > There are 12 HP 7475A's on ebay at the moment in the same price range... > All of a sudden I don't need the manual as bad as I thought. -- http://www.piclist.com#nomail Going offline? Don't AutoReply us! email listserv@mitvma.mit.edu with SET PICList DIGEST in the body