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587 links - and 5 categories

Antennas : Antenna Calculators
  • RF Transmission Line Loss Calculator - This calculator computes the matched line loss for a transmission line using a model calibrated from data for the transmission line types built in to the calculator. It also gives an estimate of the mismatched loss if the mismatch is specified.
    [ Hits: 2379 | Votes: 18 | Rating: 3.94 ]
Antennas : OCF
  • The Off-Center-Fed Dipole - A Broadband, Multiband Antenna taken from QST, Aug 1990. OCF Dipole antenna.
    [ Hits: 2037 | Votes: 1 | Rating: 8.00 ]
DX Resources : Beacons
  • VHF UHF European Beacons - MMMonVHF maintains the data for 6m, 2m, 70cm and 23cm bands in collaboration to LA0BY. This site allow display of a beacon map and latest beacon spots.
    [ Hits: 2419 | Votes: 11 | Rating: 5.91 ]
Manufacturers : APRS
  • Argent Data Systems - OpenTracker+ and Tracker2 series APRS devices for real-time vehicle tracking, weather monitoring, and remote telemetry, aprs tracker manufacturer.
    [ Hits: 2004 | Votes: 2 | Rating: 4.50 ]
Manufacturers : Antenna Analyzers
  • Timewave - Sells leading-edge voice and digital communications products to the world-wide military, government, industrial, and amateur radio marketplaces. Bluetooth Remote Audio/PTT, Rig Controller with Audio & PTT , HamLinkUSB Rig Control, Noise filtersm antenna analyzers, Multimode Data Controller, TNC, Packet Radio Terminal Node Controller. USB2RS232
    [ Hits: 3720 | Votes: 3 | Rating: 5.33 ]
Manufacturers : Test Equipment : Spectrum Analyzers
  • DataQ - PC-based oscilloscopes, data acquisition and data logger products, spectrum analyzers and voltmeters
    [ Hits: 1008 | Votes: 0 | Rating: 0.00 ]
Operating Modes : APRS
  • Google and APRS - N6BG site using google maps api to show APRS data
    [ Hits: 358 | Votes: 0 | Rating: 0.00 ]
Operating Modes : D-STAR : D-Star Clubs
  • W8DIG Central Ohio Digital Interconnect Group - Group of dedicated amateur radio enthusiasts who want to further digital modes of communication in the central Ohio area. We have been active in packet, APRS, VOIP and are now proud to provide D-Star digital voice and data connectivity.
    [ Hits: 362 | Votes: 1 | Rating: 10.00 ]
Operating Modes : International Space Station
  • Ham Radio Stations heard via ISS - This page documents Amateur Radio data digipeated by the International Space Station
    [ Hits: 951 | Votes: 7 | Rating: 5.14 ]
Operating Modes : Repeaters
  • FM Repeater Database - Via this interface you have access to one of the biggest databases on amateur radio voice repeaters.
    [ Hits: 588 | Votes: 2 | Rating: 5.50 ]
Operating Modes : Repeaters : USA
  • Repeater and Broadcast Transmitter Database - Searchable database of amateur repeaters and broadcast transmitters. The database covers the fifty U.S. states, the District of Columbia, and the ten Canadian provinces.
    [ Hits: 638 | Votes: 5 | Rating: 7.60 ]
Radio Scanning : Regional : Europe
  • Frequenzdatenbank.de - Frequency database for Germany. Emergency services, aircrafts, radio and paging system with over 2000 frequencies from all over Germany.
    [ Hits: 1216 | Votes: 14 | Rating: 4.15 ]
Shopping and Services : Amateur Television
  • 4ATV.com - Amateur TV transmitters and receivers for ham operators, wireless cameras, ham antennas, 2.4 1.2 900 Mhz systems
    [ Hits: 773 | Votes: 0 | Rating: 0.00 ]
Software : Logging
  • 5MhzLog - This logging application has been developed to improve the accuracy of the data being captured for the 5MHz Experiment.
    [ Hits: 470 | Votes: 0 | Rating: 0.00 ]
Software : Propagation
  • BeamFinder - BeamFinder is a software tool designed to conduct analyses for radio amateurs interested in radio propagation studies. It provides a large 2500 x 1800 pixel screen map of the world which displays calculated results from sophisticated models, dx data and other sources of information
    [ Hits: 2130 | Votes: 1 | Rating: 10.00 ]
Software : Spectrum analyzers
  • Spectrum Analyzer Real-time FFT - Eight-channel Audio Spectrum Analyzer is a set of Real-Time Multi-Channel Gauges for investigation of data accepted from any ADC you will want or 16-, 24- and 32-bit ADC of sound card. WDM drivers support. FFT Spectrum Analysis, OscilloScope, Frequency counter, AC/DC voltmeter, Signal-to-Noise Ratio, Signal-to-Noise and Distortion, Spurious-Free Dynamic Range, Effective Number Of Bits, Total Harmonic Distortion, Inter-Modulation Distortion, Phase Shift. Special modes of dual-channel FFT spectral analysis: Separate channels spectra, Spectra of digital sum, difference, product of two signals, Spectrum of digital product of original signal and its fundamental, Spectrum of Real and Complex Transfer Function, Cross Spectrum. Standart weighing of spectra according IEC and CCIR. Oscilloscope modes (for dual-channel ADC) are: original signals, sum, difference, dependence of one channel on another, amplitude distribution of input signals.
    [ Hits: 11087 | Votes: 9 | Rating: 7.77 ]
Technical Reference : Coax Cables and Connectors
  • Coaxial Cable's specifications - A table with Loss in DB/100m , Max power in Watts, Diameter in mm , Velocity factor (VF) expecially in VHF UHF and Microwave
    [ Hits: 2772 | Votes: 7 | Rating: 7.15 ]
Technical Reference : Components : Component Database
  • Datasheet Archive - Search engine for electronic component datasheets and application notes.
    [ Hits: 568 | Votes: 4 | Rating: 7.50 ]
Technical Reference : Duplexers
  • Diplexer 2m 70cm - This DIPLEXER separates 2m from 70cm on the same coax cable, and allows to use 2 antennas over the same cable and permits transmission on one band and simultaneous receiption on the other band by hb9abx
    [ Hits: 3603 | Votes: 10 | Rating: 8.40 ]
Technical Reference : Lightning Protection
  • OH5IY Antennas Lightning Protection - Thoughts of ham radio station lightning and transient protection, finnish legistlation, rules, standards, principles, examples, data, graphs, formulas and transient protection device schematics.
    [ Hits: 810 | Votes: 1 | Rating: 10.00 ]

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