frequency search
10 links
- What is Horn Antenna
- Horn Antenna - The energy of the beam when slowly transform into radiation, the losses are reduced and the focussing of the beam improves. A Horn antenna may be considered as a flared out wave guide, by which the directivity is improved and the diffraction is reduced. One of the first horn antennas was constructed in 1897 by Bengali-Indian radio researcher Jagadish Chandra Bose in his pioneering experiments with microwaves. The modern horn antenna was invented independently in 1938 by Wilmer Barrow and G. C. Southworth. This Horn model antenna is suitable employed in the UHF or SHF radio bands. Making this horn model antenna it will be easy for a beginner to make if it works in the 10GHz frequency, because small dimensions so it is not so difficult and also offers gain up to 25dBi.
[ Hits: 74 | Votes: 0 | Rating: 0 ]
- National Radio Data
- United States and Canadian call sign/scanner frequency databases, Worldwide airport frequencies, FIPS codes, Mass Media searches for DXing and more!
[ Hits: 1771 | Votes: 7 | Rating: 7.29 ]
- LF antennas
- Welcome to our line of Low Frequency, Natural Radio Research, Broadcast, Marine and Shortwave products. Our evolving product line is the result of our dedicated research efforts primarily in the areas of LF, VLF, MF, and HF.
[ Hits: 311 | Votes: 0 | Rating: 0 ]
- Valon Technology
- Valon Technology designs and manufacturers low cost, reliable radio frequency products such as RF Synthesizer modules, RF Frequency Dividers and Phase Gain Detectors. Main markets are military/defense, test engineering, radio astronomy, research centers and universities
[ Hits: 287 | Votes: 0 | Rating: 0 ]
- OAK Hills Research
- CW transceiver kits, QRP, frequency counters, QRP wattmeters, Dummy loads and QRP Parts
[ Hits: 4423 | Votes: 3 | Rating: 6.5 ]
- 40 MHz 8m Band Amateur Radio Exploration
- The 8m ISM band, a unique frequency range between 10m and 6m, holds potential for amateur radio enthusiasts, yet it remains largely unallocated. This spectrum offers fertile ground for research and self-training. The author's experience with low-power transmissions and WSPR testing highlights the band's capabilities and the need for a narrow, speech-free amateur allocation to encourage experimentation. Discover the world of 8m ISM radio exploration and its future possibilities.
[ Hits: 70 | Votes: 1 | Rating: 8 ]
- HamDXMap
- This dynamic DX Map aggregates various resources that will help radio amateurs to operate their stations in search of long distance contacts, DX. HamDXMap displays current MUF values and foF2 critical frequency values around the globe.
[ Hits: 385 | Votes: 9 | Rating: 9.22 ]
- High Frequency Active Auroral Research Program
- A Scientific endeavor aimed at studying the properties and behavior of the ionosphere.
[ Hits: 410 | Votes: 2 | Rating: 4.5 ]
- Search SW Stations by Frequency
- Search for station listings by HF Frequency. Results show who is scheduled when on the frequency in question.
[ Hits: 9274 | Votes: 140 | Rating: 7.75 ]
- Radio Frequency - ICOM R8500
- The RadioFrequency Program is a professional Software dedicated to all HAM, SWL and Radio Listeners. Freeware. Included is a Text-CSV dBase Converter. Connection to the ICOM R8500 Receiver.
Special Scanning Feature. Special Search Feature x large dBase.
[ Hits: 694 | Votes: 2 | Rating: 7.5 ]
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