How To Do a Radio Alignment: RTL-SDR USB 

The repeater is around 100 miles from my location. That’s why it’s so weak.
Software defined radio receiver powered by GNU Radio and Qt.
github.com/csete/gqrx
RTL-SDR and GNU Radio with Realtek RTL2832U [Elonics E4000/Raphael Micro R820T] software defined radio receivers.
superkuh.com/rtlsdr.html
Listen To Almost All Radio Frequencies for $20 | RTL SDR Dongle
ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-L7RLJt4vZ_g.html
Hacking the Wireless World with Software Defined Radio - 2.0
ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-N0p3_ES2dBU.html
Yaeseu FTL-7007
www.yaesu-museum.de/rtl-2007.html
TerraTec T Stick USB 2.0 incl. Antenne
www.ebay.de/itm/TerraTec-T-Stick-USB-2-0-incl-Antenne/133635555964