RTL SDR upconverter for shortwaves (0-30MHz)

Tomasz Watorowski has published a new build, a┬áNE612 RTL SDR Upconverter: This is a simple yet completely functional upconverter for the popular SDR donlge. The construction was build around cheap and easily obtainable mixer IC marked as NE 612, manufactured by Phillips Semi. Despite its limitations, it performs outstandingly well, at least when price-to-quality factor […]

Using the RTL-SDR dongle to detect meteors

According to AMSAT-UK, “a new paper has been released by Dr David Morgan 2W0CXV on using the RTL2841 DVB TV Dongle as a SDR processor with SpectrumLab. The paper ‘Techniques for using the RTL Dongle for Detecting Meteors’ covers the setting up and use of the dongle to receive meteor pings from the Graves Radar […]

Cheap entropy using RTL-SDR dongle

We’ve seen the RTL-SDR dongle used for a number of interesting projects, but here’s an unusual one not directly related to signal monitoring. Noel Bourke was considering the topic of entropy and randomness as it relates to encryption and came up with a unique use for the RTL-SDR. When RTL-SDRs came on the market back […]

REDHAWK SDR software

If you’re into SDR then you have probably heard of GNURadio, gqrx, SDR# and other software tools for controlling RF hardware. With the growing popularity of the HackRF platform and RTL-SDR dongle a new software tool has entered the scene: REDHAWK. As explained by its developers, “REDHAWK is a software-defined radio (SDR) framework designed to […]

RTL-SDR APCO Project 25 (P25) receiver

Balint Seeber has done it again! In this video he shows how to take the RTL-SDR dongle and use it in conjunction with the open source OP25 project to successfully demodulate APCO Project 25 (P25) digital radio voice communications. P25 is a term used to refer to a modulation system used by many public safety […]