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420 links and 11 categories about signal on dxzone.com

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Antennas : 80M
  • 80M Vertical antenna with capacitance hat - Simple wire antenna cheap to make, using readily available materials, Low angle radiation, with rejection of high angle signals Wide bandwidth, with resonance at the 80M DX window (3.790-3.800 MHz); and Maximum height is 40 feet
    [ Hits: 22302 | Votes: 22 | Rating: 7.32 ]
DX Resources : Shack Rental
  • PJ9JT Contesting QTH - SignalPoint, Caribbean Contesting Consortium. Curacao. CCC's contesting QTH is the former home of PJ9JT, John Thompson, W1BIH. This historic site has been the home of many contest wins since 1971.
    [ Hits: 1012 | Votes: 1 | Rating: 7.00 ]
Ham Radio : Personal Pages : USA
  • N6INM Glenn - Website consist of computer education, army signal corps links, and Bio
    [ Hits: 219 | Votes: 1 | Rating: 7.00 ]
Internet and Radio : Sounds Manufacturers : Filters
  • MicroSignals - MicroSignals produces a line of RF and IF signal processing components that offer high performance at an exceptional value. To achieve this MicroSignals began with an engineering team that possessed an excellent background in RF Transformer and Balun design.
    [ Hits: 567 | Votes: 1 | Rating: 7.00 ]
Manufacturers : Software Defined Radio
  • SoftRock-40 - The SoftRock-40 is a small, low-cost, good-performing "software defined radio" receiver that plugs into a computer USB port and delivers I-Q audio signals to the computer's sound card. It was designed by Tony Parks, KB9YIG and Bill Tracey, KD5TFD as an "SDR sampler project" for hams everywhere to easily try out software defined radio.
    [ Hits: 7764 | Votes: 9 | Rating: 7.00 ]
Operating Modes : Longwave
  • Antenna Noise and Signal Cancelling at LF - The fact that the phasing between a wanted signal and an unwanted signal can be different on different antennas is put to advantage. With this condition, the unwanted signal can be cancelled out by controlling amplitude and phase. The heart of the system is some form of phase control circuitry.
    [ Hits: 452 | Votes: 0 | Rating: 0.00 ]
  • Frequency Calibration for Weak Signal Work - Accurate calibration of your receiver and sound card is necessary for good results with the weak signal modes in use at LF. Modern receivers with master oscillators that are synthesized to provide all conversion frequencies greatly simplify the process. This article describes a method of making the necessary measurements and adjustments to an ICOM R75 receiver and a sound card, using the ARGO software
    [ Hits: 672 | Votes: 1 | Rating: 7.00 ]
Operating Modes : Packet Radio
  • WA4DSY 56KB RF Modem - This is a prototype of the WA4DSY 56KB RF modem. It is intended for use on amateur packet radio networks. The modem generates RF in the 28 to 30 mhz range and requires and linear transverter to convert the signal to a UHF or microwave ham band
    [ Hits: 851 | Votes: 0 | Rating: 0.00 ]
Operating Modes : Radio Direction Finding
  • VectorFox - VectorFox is a software born to incorporate a PC into the fox hunting environment. VectorFox is able to take inputs from up to 5 sources, such as a 2m beam, a 2m signal meter, a TDOA, etc, and display the results on the screen. VectorFox also accepts Agrelo inputs. From these results the operator can choose which indication is best and have a line drawn on the map in the direction of the signal.
    [ Hits: 1177 | Votes: 0 | Rating: 0.00 ]
  • Thunt.org : transmitter hunting - Amateur radio direction finding, transmitter hunting web site from San Francisco. Triangulating a radio signal direction and plotting its bearing on a map. Hunters use doppler systems for tracking hidden transmitters anywhere in the san francisco bay area, fremont california
    [ Hits: 691 | Votes: 1 | Rating: 10.00 ]
Operating Modes : Radio Direction Finding : Clubs
  • Transmitter hunting, in San Francisco Priority listing - Amateur radio direction finding, transmitter hunting. triangulating a radio signal direction and plotting its bearing on a map. hunters use doppler systems for tracking hidden transmitters
    [ Hits: 307 | Votes: 0 | Rating: 0.00 ]
Propagation : Long-Delayed Echoes
  • Unusual HF Propagation Phenomena - This page has a collection of audio samples from unusual HF propagation phenomena, from round-the-world propagation to moonbounced signals , and to ducted transmission.
    [ Hits: 269 | Votes: 0 | Rating: 0.00 ]
Radio Equipment : HF Transceivers : Yaesu FT-817
  • SignaLink SL-1 and Yaesu FT-817 - The SignaLink has been used with virtually every radio available, but the radio that is heard mentioned most often is the Yaesu FT-817
    [ Hits: 1750 | Votes: 2 | Rating: 9.00 ]
Radio Equipment : VHF-UHF Handhelds : Yaesu VX-5R Radio Equipment : VHF-UHF Handhelds : Yaesu VX-7R
  • Yaesu VX-7R Pictures - Yaesu vx-7r quad-band transceiver, includes several pictures of this yaesu transceiver
    [ Hits: 2726 | Votes: 5 | Rating: 8.40 ]
Shopping and Services : Cables and Connectors
  • Dynamic Signal - The Largest Selection of Cable Assemblies and Accessories. Coaxial Cables, Fiber Optic Cables, Connectors, Attenuators, Terminators, and Tools.
    [ Hits: 283 | Votes: 1 | Rating: 10.00 ]
Software : DSP
  • Phase 3D (AO-40) Decoder - This program demodulates the telemetry data signal transmitted by the AO-40 satellite (aka Phase III-D) using the PC sound card
    [ Hits: 1354 | Votes: 1 | Rating: 5.00 ]
  • ComTekk Tone Generator - ComTekk Software Tone generator for 2-way radio signaling. Use sound card to generate CTCSS, DTMF, tone remote, ANI and more. Synthesizer for simulation and testing of 2-way radio systems, repeaters, remote control, ANI, Paging and more
    [ Hits: 2643 | Votes: 2 | Rating: 1.00 ]
Software : Low Frequency
  • Baudline signal analyzer - A Linux based FFT spectrum analyzer designed for time-frequency browsing and scientific data visualization. Oscilloscope waveform, statistical histogram, accumulated spectral trace,Weak Signal reception, continuos data logging, FFT Analyzer and specialized measurement windows.
    [ Hits: 10742 | Votes: 29 | Rating: 9.39 ]
Technical Reference : HF Radios
  • QST signalink review - SL-1 - Designed to handle audio signal interfacing as well as transmit/receive switching Reviewed by Steve Ford, WB8IM
    [ Hits: 454 | Votes: 0 | Rating: 0.00 ]
Technical Reference : Radio Frequency Interference : Noise Reduction
  • QRM and noise reduction Priority listing - You will find on these pages my experiences and results on antennas and local/non-local QRM/noise reduction. Using a broadband vertical active magnetic loop and a home made / designed broadband amplifier. Two vertical magnetic Alford loops are used in an array. Analog and Digital Signal Processing and a dual phase coherent Software Defined Radio (SDR) are used. By PA0SIM
    [ Hits: 4156 | Votes: 5 | Rating: 8.20 ]
Technical Reference : Software Defined Radio
  • Introduction to DSP - Bores Signal Processing freeware course to DSP
    [ Hits: 982 | Votes: 1 | Rating: 9.00 ]
  • Software-defined radio by Wikipedia - According to wikipedia a software-defined radio is a radio communication system which uses software for modulation/demodulation of signals
    [ Hits: 843 | Votes: 1 | Rating: 4.00 ]
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