signals

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signals

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Antennas : Receiving
  • Small Loop Antenna Array for HF Reception - Receive-only loop antennas have some nice response characteristics that make them ideal when used for reception of skywave signals.
    [ Hits: 932 | Votes: 1 | Rating: 9 ]
Antennas : Theory
  • Antenna Basics : Directional Antennas - An article describing basic concepts of antenna radiation, and in particular directional antennas like Yagi antennas or Quad antennas and how they determine the direction or signals.
    [ Hits: 346 | Votes: 1 | Rating: 2 ]
Antennas : VHF UHF Internet and Radio : Sounds
  • Signal Identification Guide - This wiki is intended to help identify radio signals through example sounds and waterfall images. Most signals are received and recorded using a software defined radio
    [ Hits: 705 | Votes: 3 | Rating: 1 ]
Operating Aids : History Operating Modes : ESSB
  • HI FI ESSB AUDIO - Listen to NU9N Radio Interview On ESSB Audio and to audio samples of some ESSB signals
    [ Hits: 276 | Votes: 0 | Rating: 0 ]
Operating Modes : JT65
  • Receiving JT65 with RTL-SDR - How to receive JT-65 signals using a cheap RTL-SDR dongle with the 820T2 tuner chip
    [ Hits: 832 | Votes: 1 | Rating: 7 ]
Operating Modes : Morse code
  • CW Bass Ackwards - CW-R Explained. CW reverse mode CW-R receives CW signals with a reverse side CW carrier point like that of LSB and USB modes
    [ Hits: 501 | Votes: 1 | Rating: 10 ]
Software : ADS-B
  • Virtual Radar Server - Virtual Radar Server is a free windows decoder of ADS-B signals received by several radio receivers and support even networked data feed. The Server publish a Google Maps-based display of aircraft positions and flight list
    [ Hits: 2347 | Votes: 6 | Rating: 5.33 ]
Software : Android
  • Wavesink - Wavesink Plus is an Android based RTL-SDR receiver app with a free trial and paid full version, can decoding DAB+ and DRM+ digital radio signals.
    [ Hits: 634 | Votes: 1 | Rating: 7 ]
Software : Digital SSTV
  • JMSK - JMSK is a software modem that implements a good coherent MSK demodulator that has performance comparable to BPSK. Signals are demodulated from the soundcard. Modulated signals can be routed through the soundcard or to an external device such as a DDS module for direct RF modulation. The advantage of MSK compared to PSK is that non linear amplifiers can be used and has a faster roll off. It is an open source cross-platform program written in C++ Qt.
    [ Hits: 369 | Votes: 2 | Rating: 5.5 ]
Software : JT65
  • WSJT-X Download Page - WSJT-X - Weak Signal Communication, by K1JT - offers specific digital protocols optimized for EME (moonbounce), meteor scatter, and ionospheric scatter, at VHF/UHF, as well as for LF, MF, and HF propagation. The program can decode fraction-of-a-second signals reflected from ionized meteor trails and steady signals more than 10 dB below the audible threshold. WSJT-X incorporates nearly all popular capabilities of programs WSJT and WSPR, while adding comprehensive rig control and many other features. Open-source, download latest version for Windows, Linux, Macintosh OS X.
    [ Hits: 8702 | Votes: 50 | Rating: 7.1 ]
Software : Morse Code Decoders
  • CW Decoder Logic - Free CW morse code decoder software for Windows versions : Vista sp2, 7, 8, 10. Decode CW signals with auto tracking features, auto detection of speed
    [ Hits: 3246 | Votes: 10 | Rating: 8.2 ]
Technical Reference : Arduino
  • The WB0RIO 28 Mhz Arduino Beacon - This project involves the construction of a 5 Watt Morse code beacon transmitter that operates in the 28.200 to 28.300 section of the 10 Meter Amateur Radio band. The beacon controller uses an Arduino Uno microprocessor board to produce the three signals that control the transmitter.
    [ Hits: 622 | Votes: 0 | Rating: 0 ]
Technical Reference : Filters Technical Reference : Key Clicks
  • About Key Clicks - The Necessary Bandwidth for CW Signals By George Grammer W1DF
    [ Hits: 192 | Votes: 0 | Rating: 0 ]
Technical Reference : RF Design
  • Introduction to RF & Wireless Communications Systems - This tutorial covers an introduction to RF, wireless, and high-frequency signals and systems, includes explaination of what is RF, why operate at Higher Frequencies, Frequency Shifting through Frequency Mixing.
    [ Hits: 281 | Votes: 1 | Rating: 6 ]
Technical Reference : Raspberry Pi
  • Sending and receiving Laser CW signals with a Raspberry Pi - Sending and receiving text with Morse code light pulses across the room is a fun and cheap project you can do on a Raspberry Pi or Arduino or any other microcontroller. This post explains how I did it, and how you can do it too.
    [ Hits: 290 | Votes: 0 | Rating: 0 ]
  • The Raspberry OscilloPhone - Use your Smartphone as an Oscilloscope to visialize signals from 150 Hz to 15kHz and as a Signal Generator to generate sinusoidal, square and triangular signals up to 15kHz
    [ Hits: 380 | Votes: 0 | Rating: 0 ]
Technical Reference : Receivers : Crystal radio
  • UHF Crystal Radio - A simple UHF Crystal Radio wired up to check for reception of VHF/UHF signals in the vicinity of the shack.
    [ Hits: 719 | Votes: 5 | Rating: 7.6 ]

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