sw freq

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sw freq

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Antennas : Feed Lines
  • Transmission Lines - Whenever you choose a coax feedline, the frequency of operation is a very important consideration. Over the operating bandwidth of the coax the VSWR is low, typically 1.2:1 or better. Insertion loss is also an important parameter. It is usually specified in dB/foot and is a linear relationship.
    [ Hits: 1272 | Votes: 0 | Rating: 0 ]
  • Build An LF Antenna Analyzer - A Portable Low Frequency Antenna Analyzer, For those of us who like to play with antennas on the ham bands, one of the handiest tools to have around the shack is an "antenna analyzer". These gadgets combine a signal generator and standing-wave ratio (SWR) sensor in a small battery-powered unit.
    [ Hits: 4567 | Votes: 2 | Rating: 5 ]
Antennas : Homebrewing Techniques
  • Antenna Impedance measurement - When experimenting on an antenna it's often important to determine its feedpoint impedance at various frequencies across the operating band. It's easy enough to measure SWR, but sometimes we need to know more detail than this
    [ Hits: 1425 | Votes: 6 | Rating: 2.67 ]
DX Resources : Contest : Contest Stations
  • SJ2W Contest station - A very frequently updated blog of building a large contest station in northern Sweden
    [ Hits: 286 | Votes: 0 | Rating: 0 ]
DX Resources : Contest : Resources
  • Amateur Radio Contesting FAQ - Answers to frequently asked questions for newcomers to the sport of amateur radio contesting.
    [ Hits: 3468 | Votes: 2 | Rating: 5.5 ]
Manufacturers : Amplifiers
  • SSB Electronic USA - manufactures and distributes HF, VHF, UHF and SHF equipment covering 10MHz. - 47.0GHz. Our products include: Wireless LAN / WAN Bidirectional Linear Amplifiers, Low Noise Preamplifiers - LNA's, RF Linear Amplifiers, Relays, Transverter Systems, Frequency Translation Systems, Downconverters, Antennas, Parabolic Dishes, Coaxial Cable, Relays, Antenna Switches, Microwave Test equipment, PC controlled Receivers, Microwave Linear Amplifiers including models for Telemetry, Wireless, and CDMA applications.
    [ Hits: 8402 | Votes: 8 | Rating: 6.12 ]
Manufacturers : Antennas : Military
  • Optoelectronics - DTMF, RF, decoders receivers and accessories icluding computer interface boards, frequency counters, tone decoders, spectrum sweeper and nearfield receivers
    [ Hits: 4003 | Votes: 5 | Rating: 6.2 ]
Manufacturers : Electronic Components
  • A & A Engineering - Smart Battery Chargers, WeatherFAX, Color SSTV,GPS-Based Frequency Standard, Power/SWR Meter, , Digital Frequency Synthesizers
    [ Hits: 1704 | Votes: 1 | Rating: 1 ]
Operating Aids : Beginner's Guides
  • Radio & Communications - Info about many aspects of Radio & Communications. Antennas, signals, frequencies, codes, swr, scanning etc.
    [ Hits: 18494 | Votes: 13 | Rating: 3.32 ]
Operating Modes : GPS
  • 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.
    [ Hits: 2006 | Votes: 2 | Rating: 4.5 ]
Radio Scanning : Regional : Australia
  • Sydney Scanner Frequencies - One of the best compilations of frequencies in Sydney particularly SW. Include Police, other emergency people, Marine, the entire aircraft list for Sydney, RAAF squadron frequencies, UHF CB frequencies as well as a heap of miscellaneous frequencies like security, shoppin malls etc.
    [ Hits: 14049 | Votes: 59 | Rating: 6 ]
Radio Scanning : Regional : Europe
  • UK Scanner Frequencies - The UK Scanning Directory - HF, VHF and UHF UK Scanner Frequencies Database Updated Daily by a dedicated group of Radio Amateurs and SWL Listeners
    [ Hits: 2316 | Votes: 337 | Rating: 7.69 ]
Shortwave Radio : BCL Resources
  • Radio Worldwide on Shortwave - Kurzwelle, shortwave, Radio , DX, broadcasting, QRG, SWL, receiver, Empf§nger, BCDX, DX-Clubs, hobby, QSL, schedules, Frequenzen
    [ Hits: 1223 | Votes: 1 | Rating: 1 ]
Shortwave Radio : SWL Resources
  • Hungarian Listener Homepage - FM & SWL, broadcasting, media, FMDX,frequency lists, ham adio
    [ Hits: 833 | Votes: 3 | Rating: 10 ]
  • Abc's of Shortwave portable radios - An introduction to portable shortwave receivers and sw radio. What to look for in a good portable. Reviews of Sangean ATS505. Band info and frequecies.
    [ Hits: 4205 | Votes: 8 | Rating: 6.75 ]
  • Search SW Stations by Frequency - Search for station listings by HF Frequency. Results show who is scheduled when on the frequency in question.
    [ Hits: 9276 | Votes: 140 | Rating: 7.75 ]
Software : PSK31
  • RX-PSK31 - Easy to use Audio Spectrum and PSK31 decoding program specially designed for SWL's who don't need TX or for anyone who just like to monitor PSK31 or analyse signals. Adjustable DSP and Spectrum settings for audio and frequency spectrum to set for best decoding of PSK31.
    [ Hits: 3109 | Votes: 12 | Rating: 7.41 ]
  • RX-PSK31 - Easy to use Audio Spectrum- and PSK31 decoding program specially designed for SWL's who don't need TX or for anyone who just like to monitor PSK31 or analyse signals. Adjustable DSP and Spectrum settings for audio and frequency spectrum analasys or to set it for best decoding of PSK31 signals. By ON6MU
    [ Hits: 2959 | Votes: 2 | Rating: 10 ]
Software : Radio Control
  • Commander  pop - A free application that controls up to 4 Alinco, Elecraft, FlexRadio, Icom, JST, Kachina, Kenwood, TenTec, or Yaesu transceivers, switching between them manually or automatically based on frequency, and displaying frequency-dependent settings for devices like tuners and amplifiers; includes a bandspread, and supports transverters, frequency and mode tracking by an independent transceiver or receiver, SDR-based panadaptors, and SO2R switching with microHam or OTRSP-compliant devices.
    [ Hits: 87462 | Votes: 1225 | Rating: 6.18 ]
Technical Reference : Audio
  • Audio Spectrum Analyzer - OscilloMeter  pop - Audio Spectrum Analyzer for Real-time, FFT, OscilloScope, Frequency counter, voltmeter, noise and distortion meter, phase shift meter. Multi-Tone Sound Frequency Sweep Generator. White, pink noise.
    [ Hits: 89789 | Votes: 328 | Rating: 6.2 ]

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