Once again, this part is *not* obsolete. National no longer makes it, but TI does: http://focus.ti.com/docs/prod/folders/print/lm3900.html Ian At 03:43 AM 12/3/2003, Steven Downhill wrote: >Hi all, > >Does anybody know of a source in the UK or a substitute for the obsolete >LM3900. >Thanks. > >Regards >Steven