This page contains links to various SRR-11/12/13 files.
1) The entire SRR-11/12/13 manual in PDF format.
2) How to repair or replace those pesky crank-arms taken from Josh Rovero's excellent site at http://www.roveroresearch.info/.
3) How to repair those shorted coils also taken from Josh Rovero's excellent site at http://www.roveroresearch.info/.
4) An RCA designed replacement for the ballast tube. This circuit is usable for any ballast tube and is far simpler than many others I have seen. This was also taken from Josh's site, and was written by Joe Bartolick.