Amazon.com: AEcreative 2-Way Antenna Signal Splitter for Uniden RadioShack Icom Alinco AOR Scanner shortwave Radio RTL-SDR Receiver BNC : Electronics
New AAS-300 3-way antenna splitter
Splitter Archives - Scanner School
Multicouplers
Base Antennas | Scanner Master Blog
Best Buy: Dynex™ 4-Way Coaxial Splitter Silver DX-HZ705
Military Comms Monitoring. HF VHF UHF
Splitting scanner antenna ? - Transmission1
Buy Rijin Doujin-Bingfu VHF UHF Ham Radio Antenna Amateur Radio Mobile Radio Scanner Antenna BNC at affordable prices — free shipping, real reviews with photos — Joom
Using multiple RTL-SDR dongles with the same antenna : r/RTLSDR