J-Pole Antennas for 2 Meterspop
- This paper describes two types of 2 meter J-Pole antennas, one made of copper pipe and a roll-up J-pole made of TV twin lead. The figures give the details of the dimensions, components and construction.
SWL antenna distribution system
- A methodology for connecting multiple LF/MF/HF receivers to a single antenna via readily available and inexpensive 75-ohm TV cable. Custom made baluns and splitters provide impedance matching and prevent interaction between receivers.
ARTRA QRP Kits
- Lots of homebrew kits, you can buy kits or download as free, Association des Réalisation et Techniques RadioAmateurs. Transceivers, filters, converters, frequency meters, antenna analyzers, ATV receivers, interfaces
GPS Time Series
- The Global Positioning System (GPS) is a constellation of 24 satellites which is used for navigation and precise geodetic position measurements.
USCG Navigation Center DGPS
- Differential Global Positioning Service (DGPS) is a land-based augmentation system that receives and processes signals from orbiting GPS satellites, calculates corrections from known positions and broadcasts these corrections via a Medium Frequency (MF) Transmitter to DGPS users in the Broadcast Site’s coverage area.
G7IZU Radio Reflection Detection Page
- Meteor Shower, Aurora, Sporadic-E and Solar Flares detected using Radio Signal Reflection, by Andy Smith, G7IZU. Live waterfall displays from three receivers, live Es propagation maps.
Swiss Radio International
- An online database of Swiss Radio International shortwave and satellite frequencies and schedules which may be searched by language, target country and/or region.
- Lists the programs and schedules of Global Catholic Radio WEWN, which operates 24 hours daily on WEWN shortwave, via satellite and live audio streams, and also on many AM/FM stations in U.S.A.
The Voice Of Mongolia
- The Voice Of Mongolia is the country's only overseas broadcasting service and is operated by Mongolian Radio & Television, a public service broadcaster of the Mongolian Government.
Metux SSTV radio fax solutions
- Provide software and appliances for picture transmission via SSTV and radio fax. Software products are available on GNU/Linux and may be easily used for automatic (non-interactive) image transmissions and receival.
Big Fat Tail Productions
- PocketSat is a full-featured satellite tracking application for PalmOS and PocketPC devices. It is designed to be usable by both experienced satellite trackers as well as novices who are interested in knowing when they can simply look up and see satellites.
430MHz ATV transmitter
- ATV transmitter on 430MHz band used with special transmitting tube named 5894 for final stage. Run about 10W average for TV signal and 20W at synchronous peak. Final stage control gird modulation works well for NTSC color video signal and good at audio as well.