Outdoor antenna works indoor only

[LawrenceHill]

You are suffering from overload caused most likely by mobile phone signals. You will need a filter.
Your symptoms are the same as in this thread:

Mysterious issue/phenomena with connectors/Pi/Prostick

Hi All, Today I’ve installed the FA dark blue 1090 filter and that strange issue/phenomena has disappeared!!! Eureka!! All connections has well done, no any unscrew to the “magic point”. Msg/rate improved alot, range increased too. I’ll buy a second filter to install it in the second radar setup, having the same problem. So… it seems I was suffering of a severe RF problem managed by filter, or this filter added a new electrical “situation” going to solve my strange issue. I don’t know, but …