RTL-SDR is a cheap software defined radio that uses a DVB-T TV tuner dongle based on the RTL2832U chipset and R820T2 tuner.
Wedinard RTL SDR USB Tuner Receiver, UV Tuner Receiver Dual SMA
RTL-SDR V3 4.5V 8-Bit Software Defined USB Radio Receiver
Wedinard RTL SDR USB Tuner Receiver, UV Tuner Receiver Dual SMA
RTL-SDR dongle prototype with the relevant integrated components
Generic USB Adapter RTL-SDR RTL2832U + R820T2+ 1Ppm TCXO TV Tuner
SDR USB Dongle - TXAdvance
Ubersweet® 100KHz-1.7GHz UV HF RTL-SDR USB Tuner Receiver + U/V
Buy NooElec NESDR Mini 2+0.5PPM TCXO USB RTL-SDR Receiver (RTL2832
NooElec TV28T v2 USB DVB-T & RTL-SDR Receiver, RTL2832U & R820T Tuner, MCX Input. Low-Cost Software Defined Radio Compatible with Many SDR Software
RTL-SDR Blog R820T2 RTL2832U 1PPM TCXO SMA Software Defined Radio
A DVB-T receiver which has gained a lot of popularity for SDR (Software Defined Radio). In an aluminium enclosure TXCO for maximum temperature
RTL-SDR receiver dongle (v3)
RTL-SDR Software Defined Radio Receiver USB Stick