exactly - the fun is to get the maximum at one given location. and yes i was simply quite lucky with the reception here at my house in the south of munich. the big red lump 
is the battery that feeds the raspberrypi zero and dongle. this is a fully ads-b receiver running dump1090 - antenna, dongle, computer and battery. here and below you find some of my tinkering: Post your PiAware setup - #152 by TomMuc
have a good one
tom