background preloader


Facebook Twitter

Radio Circuits Blog: Active Antenna for AM/FM/SW. This simple little circuit can be used for AM, FM, and Shortwave(SW).

Radio Circuits Blog: Active Antenna for AM/FM/SW

On the shortwave band this active antenna is comparable to a 20 to 30 foot wire antenna. It is further more designed to be used on receivers that use untuned wire antennas, such as inexpensive units and car radios. Parts List:R1 = 1MC1 = 470pFC2 = 470pFL1 = 20uH to 470uH (see text)Q1 = MPF102, 2N4416, or NTE451 A KIT is available and may contain any value uH for L1, between 20uH and 470uH, to get you started. Change this value to suit your needs.Parts only, no pcb: [Parts KIT] L1 can be selected for the application. This unit can be powered by a 9 volt alkaline battery.

The heart of this circuit is Q1, a JFET-N-Channel, UHF/VHF amplifier in a TO-92 case. Output is taken from jack J1 and run to the antenna-input of your receiver.Although this little circuit can easily be mounted on a piece of vero-board, I have supplied the printed circuit board and layout diagram if you wish to make your own. Conference-rtl-sdr. En_sdr. Rtl_fm Guide: Updates for rtl_fm overhaul. Updates for rtl_fm overhaul Rtl_fm is a little utility I wrote for the rtl-sdr project.

Rtl_fm Guide: Updates for rtl_fm overhaul

The program was made to fill a gap in software defined radio: all the computers weaker than a Pentium 4. Basically, an Atom processor processor does not have enough oomph to demodulate something as simple as narrow band FM using the standard tools. (Recently a high performance FM demodulator was released, Simple FM but it works only passably on newer Atoms.) So rtl_fm was written with one goal, efficiency, in mind. The very first version ran with plenty of cycles to space. Rtl_fm is a general purpose analog demodulator. Throughout this guide, I'll be using Sox's play command to play the audio. Before starting, make sure your dongle works.rtl_test should return a list of supported gain values and not produce error messages.

It is also very important to always make sure rtl_fm and Sox are both set to use the same data rate. Music on the Radio. Tutorial: Cheap ADS-B Aircraft RADAR. The RTL-SDR can be used as a super cheap real time air radar.

Tutorial: Cheap ADS-B Aircraft RADAR

Modern planes use something called an ADS-B (Automatic Dependent Surveillance-Broadcast) Mode-S transponder, which periodically broadcasts location and altitude information to air traffic controllers. Software Defined Radio in C# Terratec. CINERGY T-Stick RC Fernsehen überall Stecken Sie den CINERGY T Stick RC einfach in einen USB Port Ihres Computers, installieren Sie die Treiber und Software von unserer Webseite - und schon steht dem mobilen Fernsehvergnügen nichts mehr im Wege.


Der CINERGY T Stick RC bringt alles mit, um Notebook, Netbook oder Desktop-Rechner in einen Fernseher mit eingebautem Videorekorder und vielen weiteren Funktionen zu verwandeln, Mini Stabantenne für mobilen DVB-T Empfang und Fernbedienung inbegriffen. Batterien oder ein Netzteil werden nicht benötigt. Aufnehmen auf der Festplatte und zeitversetztes Fernsehen Die TV-Software macht Fernsehen am Computer zum Erlebnis. Antenna Archives. Everyday multiple NOAA weather satellites pass above you.

antenna Archives

Each NOAA weather satellite broadcasts an Automatic Picture Transmission (APT) signal, which contains a live weather image of your area. The RTL-SDR dongle combined with a good antenna, SDRSharp and a decoding program can be used to download and display these live images several times a day. Rtl-sdr. Introduction La radio Définie par logiciel, ou SDR pour Software Definied Radio, consiste à utiliser un ordinateur et une suite logicielle pour recevoir/émettre, moduler/démoduler, crypter/décrypter des signaux Radio.


La pratique s'est développée dans les années 90 avec le perfectionnement du matériel informatique. Antti Palosaari a découvert que contrairement aux tuners TNT habituels, le rtl2832u permettait de recevoir directement (sans traitements matériels) les signaux radio du fait de ses fonctionnalités DAB/DAB+/FM. Des drivers permettant son utilisation en SDR ont été développés par osmocom et sont utilisables avec un bon nombre de logiciels. Ce tutoriel a pour objectif de décrire les procédures d'installation et d'utilisation du rtl2832u. Choix du matériel Installation L'installation des bibliothèques RTL-SDR, de GnuRadio muni de ses extensions nécessaires est automatisée par l'utilisation de ce script : wget chmod +x build-gnuradio . Premiers pas. Welcome to the wiki! [ wiki]

This Wiki is intended to collect all sorts of disparate information concerning the use of the so called RTLSDR.

Welcome to the wiki! [ wiki]

If you wish to add to this wiki please contact the Osmocom guys and ask for editing access rights to this site. Hardware The Chips RTL2382U - The ADC and USB data pump. RTL2832U - SpenchWiki. From SpenchWiki Introduction This page details information specific to RTL2832U-based DVB-T USB dongles. The information applies to using it with GNU Radio (using gr-baz), and on Windows with the ExtIO plugin for HDSDR. News I have created a new discussion forum on Google Groups as a place to discuss this code. Supported devices.