My IA and I checked the splitter connections, and determined that they were clean. When I get back to the plane, I will replace the 1977 splitter with a new COMAC just as a precaution. I am somewhat pissed that the shop didn't consider informing me that the cables to the VOR/CDI+GS and VOR/CDI and GNS530W from the splitter had the original RG58 cables. Since they replaced the ELT, they should have given me the option to replace the old cables with the new RG400 cables from the splitter to the panel. The antenna to splitter will be completed at the annual. I was informed that there was a splitter just behind the GNS530W under the glareshield.