sky wave
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Antennas : NVIS- The Near Vertical Incident Skywave (NVIS) antenna
- Introduction to NVIS antenna and NVIS propagation. A simple NVIS antenna can be constructed as shown in this article
[ Hits: 475 | Votes: 1 | Rating: 10 ]
- DIY NVIS Antenna Using a Mag Mount
- NVIS antennas, also known as Near Incident Vertical Skywave antennas have a high angle of radiation. Something on the order of 60 degrees, to straight up to 90 degrees. A portable, easy to setup and cheap nvis antenna project.
[ Hits: 652 | Votes: 4 | Rating: 5 ]
- The Yagi Antenna - Presentation
- A presentation of the Yagi Antennas, and other interesting tid-bits by Brian Mileshosky.
This document explains basic concepts of Yagi-Uda antenna theory, influence of reflector and directors on global antenna gain and directivity of radio waves. A simple tape measure antenna project is also included.
[ Hits: 543 | Votes: 2 | Rating: 7 ]
- Propagation on 630 Meters and 2200 Meters
- This is a theoretical look at propagation on 630-Meters and 2200-Meters using ray tracing software. It expands on the brief discussion in the ARRL Handbooks.
The Earth's magnetic field affects 630-Meter and 2200-Meter band propagation. Lower ionization reduces absorption, aiding low-frequency propagation. Differences exist between bands, limited daytime sky-wave propagation. Sunrise/sunset show promise, yet mechanisms are unclear. Ducting possible at night in specific conditions. Negative ions enhance propagation. Inefficient antennas and high man-made noise are anticipated. Groundwave propagation is significant on 2200-Meters.
[ Hits: 38 | Votes: 1 | Rating: 10 ]
- Skywave Linux
- Linux for shortwave and amateur radio monitoring. Supports popular SDR hardware and online streaming from KiwiSDR, WebSDR, and Spyserver sites. Articles about using Linux with your SDR devices.Skywave Linux, an innovative operating system, leverages cutting-edge technology for seamless access to radio signals globally. Ideal for regions with limited internet access, it effortlessly connects to a network of SDR servers, offering high-performance SDR operation without the need for extensive hardware. With pre-installed and configured SDR software, Skywave Linux simplifies signal discovery and operation for all users.
[ Hits: 286 | Votes: 0 | Rating: 0 ]
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