Normally the antenna should be vertical for best reception - However in some countries in areas that are hard to reach - broadcasters have set up small low powered transmitters to fill in reception areas. This may happen, for example, in valleys. These secondary transmitters send the signal in a way that is may be received better if the antenna is tilted to approx. 90 degrees. In addition, even under “normal conditions” the antenna may receive better if tilted.
Why does my Philips antenna tilt?
Published on 2017-08-24