If anyone has subject manual please contact me. I have an R-266/URR-13 myself and had an inquiry tonight from someone who's trying to work on one and needs at least the schematic. Robert Downs - Houston <http://www.wa5cab.com> (Web Store) MVPA 9480 <wa5cab at cs.com> (Primary email) <wa5cab at houston.rr.com> (Backup email)