Hello, I am trying to upgrade my receiver to an outdoor antenna. I ordered the first 1090 antenna from amazon and installed it on my roof with new cable. When I attached the outdoor antenna to the receiver, all the aircraft that I was tracking with the indoor antenna disappeared. I then went up on the roof to check the new cable (everything was good) and then hooked up the indoor antenna to the new cable. I was now able to track even more aircraft at farther distances than before. Ordered replacement antenna from Amazon and replaced it today. Same thing happened, all aircraft being tracked with the indoor antenna disappeared with the new FA antenna.
Not sure what to do now. Does Amazon have a bad batch of antennas? I did measure both antennas at the connector. They both measure as an open, don’t know what they are supposed to be (short/50 ohm).