Well it appears my Stridsberg MCA208M is out again? I've substituted a passive splitter, a Minicircuits Model ZB4PD1-500+, in the meantime. This is only affecting my RJTT feeds in Tokyo.
Update: 2016-07-22. Stridsberg fixed the splitter free of charge. It is now back in service in Tokyo. RJTT feeds are back to normal.
Ken