I've been experimenting with RTL TV
dongles and have set up a ADS-B receiver. Antenna is a UHF CB Yagi which, bizarrely, seems to work sort of ok. Next project is getting a better 1090MHz antenna up in the air to improve the range.
Check it out at http://dump1090.vk6hgr.echidna.id.au
The receiver is a D-Link DIR-612 router running OpenWrt
and the dump1090 software.
Gavin Rogers; VK6HGRhttp://vk6hgr.ampr.org/WARSUG forum administrator
Site and stream donations: https://www.paypal.me/vk6hgr