Now you are having to get me to admit the same thing. In my beginnings in electronics I can remember spending hours trying to get two diodes to ampify too! Oh well.....that's what you get when you don't learn the basic semiconductor theory. EPE magazine (Dec 2003 Page 826) has a good tutorial on transistors. It is a good read. Rick >Michael Rigby-Jones wrote: >(I can remember having the same idea and trying this when I was starting to get interested in electronics at about 12 YO!). -- http://www.piclist.com#nomail Going offline? Don't AutoReply us! email listserv@mitvma.mit.edu with SET PICList DIGEST in the body