i just used the yagi in addition to my omnidirectional antenna while the whole setup was in the attic. now my omni-antenna is mounted on the roof (as low as possible) and i get the data from their runway without the need of the yagi. my house sits on a small hill but in direction to the airport a hill about 150feet higher than my position sits in-between. with the yagi i was able to overcome this obstacle even from inside the attic. if i were you i’d give the yagi a try - there is a real chance to get the signals even when there is no direct line of sight. btw. the airport next to me is not a major airport there are about 30 starts and landings per day: Funny - what's that? Alco-Test for helicopter pilots? - #3 by TomMuc
using the yagi now i could get about 50-100 aircrafts per day (maybe some more) additionally from czechoslovakia far away - but i’m not really interested in these flights over there …