I'm stumped and a forum search didn't yield any help. I have a Raymarine chart plotter RL70C+ fed by a Raystar 120  gps antenna.  The system is now intermittantly loosing its fix. When I talked to Raymarine, they said the 120 was at end of life and was surely the problem, and I should replace it with their 130 model and also order the "Seatalk to Seatalk(ng) (for next generation) converter kit. I ordered and received those items on Saturday. The instructions are sketchy but complicated, the converter is just a connector block which I think serves as a data buss (?) to which I'm supposed to connect power, the new 130 antenna, my RL70 plotter and anyother older "Seatalk" instraments.  I did all that and the gps is not working. Getting Raymarine tech support on the phone is a project in itself. Anybody done this chore? I've double  checked my installation and can't decide what I've done wrong. Any help appreciated as usual. Sam