Playing with Raspi and ADSB.
I made a little box to put it on a pole at my second location.
The antenna is a double helix, housed into a PVC pipe.
Testing in Bucharest on the balcony, it looks well!
Note to myself:
Change settings: sudo dpkg-reconfigure dump1090-mutability
Tweak local OSMap: sudo nano /usr/share/dump1090-mutability/html/config.js