I just installed an outside UHF antenna and my VHF/UHF one is in the roof. I installed the UHF one because I was getting poor signal on UHF channels. I am in Melbourne. I am using a diplexer on the UHF antenna mast. After installing it, the reception is worse on all channels. I have checked all the wiring several times. This is really frustrating because it's suppoed to be crystal on all channels.
What can I do?