Run a Spectrum Analyzer in your PC. Download free programs that can convert your PC into a powerful spectrum analyzer.<img src="http://feeds.feedburner.com/~r/dxzone/xml/~4/nRc73wr0jnE" height="1" width="1"/>

Oscilloscope Guide to Links of main manufactures like Agilent HP, BK Precision , Fluke Protek LeCroy and Tektronix<img src="http://feeds.feedburner.com/~r/dxzone/xml/~4/SiHl4gLtiUk" height="1" width="1"/>

Technical Reference/Software Defined Radio
A blod dedicated to SDR and RTL-SDR featuring sdr new and product reviews

Technical Reference/Software Defined Radio/RTLSDR
Upconverter MF/HF Converter for Receivers. Converts signals in the MF and HF Bands to signals in the VHF Band. Intended for use in receiver applications with projects like RTL-SDR/SDR#/FunCube Dongle, or to listen to AM radio using an FM receiver.

Manufacturers/Software Defined Radio
Maker of bladeRF usb superspeed SDR Software Defined Radio

Technical Reference/Software Defined Radio/RTLSDR
Discussion group about RTLSDR Dongles, software support and hardware mods for these Software Defined Radio systems based on RTL2832U

Technical Reference/Software Defined Radio/RTLSDR
Comparison table of a RTL-SDR and FunCubeDongle

Software/Logging
DX Buddy is a multi purpose ham radio application that let you control your radios, or controller, offer a logbook, cluster access, qrz lookups, and interface with several popular ham radio applications

Manufacturers/Software Defined Radio
Software Defined Radio parts, RTL-SDR DVB-T USB Stick, cables, antennas, upconverters, leds delaer

Ham Radio/Blogs/Special Interest
RTL-SDR is a very cheap software defined radio that uses a DVB-T TV tuner dongle based on the RTL2832U chipset. This is a blog about rtl-sdr, software defined radio and their developments and applications.