I have sockets in two rooms with wiring buried in the walls and poking out over the front door. I can't replace or add to the buried wiring. I added a wideband, high gain TV aerial, a C shape FM aerial and a masthead diplexer on the roof. Then I ran a single downlead to a splitter where the buried wiring exits the building feeding dipexer faceplates. This works OK for FM, analogue and DAB with a simple booster, but Freeview is prone to interference. I think I need to add a mast head amplifier - because the wiring is unreplaceable (and I don't have a loft) I need one that will output to 2 downleads and accept a DC feed to one leg (as I can't provide DC through the splitter as it would 'power' the other socket. I'm hoping someone can recommend a masthead amp that will diplex the TV and FM signals into both downleads and accept DC on one leg - that would be ideal. Alternatively one that can be put 'after' the existing unpowered diplexer would be fine too, but I'm assuming that fewer links in the signal chain would be better, especially at the unamplified end. Many thanks for looking!