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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: 2089 | Votes: 17 | Rating: 4.05 ]
Antennas : Baluns
  • How to Make a Great 9:1 RX Transformer - There are lots of good designs for matching transformers for receiving antennas. Make it yourself it's cheap and easy, and very high performance. This is the design used in the TRX-9 transformers.
    [ Hits: 2730 | Votes: 0 | Rating: 0.00 ]
Antennas : K9AY
  • Beverages on 40 Meters - Gary Breed, K9AY experience with beverages on 40 meters
    [ Hits: 2216 | Votes: 2 | Rating: 3.50 ]
Antennas : OCF
  • The Off-Center-Fed Dipole - A Broadband, Multiband Antenna taken from QST, Aug 1990. OCF Dipole antenna.
    [ Hits: 1584 | Votes: 1 | Rating: 8.00 ]
Contesting : Stations
  • Ham Radio Contest Maps - US Contesters maps generated based on ARRL online score data by WM5R
    [ Hits: 1715 | Votes: 1 | Rating: 7.00 ]
DX Resources : Beacons : Beacon Lists
  • Beacon List Generator - Ham Radio Beacon list generator from SK6YH database
    [ Hits: 711 | Votes: 3 | Rating: 7.00 ]
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: 1436 | Votes: 1 | Rating: 8.00 ]
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: 2993 | Votes: 2 | Rating: 7.50 ]
Manufacturers : Test Equipment : Spectrum Analyzers
  • DataQ - PC-based oscilloscopes, data acquisition and data logger products, spectrum analyzers and voltmeters
    [ Hits: 835 | Votes: 0 | Rating: 0.00 ]
Operating Modes : APRS
  • Google and APRS - N6BG site using google maps api to show APRS data
    [ Hits: 278 | 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: 281 | 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: 660 | Votes: 7 | Rating: 5.14 ]
Radio Equipment : VHF-UHF Handhelds : Kenwood TH-D7A-E
  • TH-D7 Data communicator - Kenwood TH-D7 details. Kenwood's new TH-D7e is equipped with a TNC and provides a wide range of data communications options
    [ Hits: 382 | Votes: 0 | Rating: 0.00 ]
  • TH-D7E modifications - Extending reception and transmission of a Kenwood TH-D7, upgrading firmware, enabling the SKY-COMMAND
    [ Hits: 630 | Votes: 0 | Rating: 0.00 ]
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: 978 | Votes: 11 | Rating: 3.18 ]
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: 547 | Votes: 0 | Rating: 0.00 ]
Software : Databases
  • Super Check Partial - Super check partial is a feature that K1EA first introduced in his CT logging software. It enables the use of a database to extend the list of calls that appear in the check partial call window. Used correctly, it can help you more quickly pull a call out of the QRM
    [ Hits: 225 | Votes: 0 | Rating: 0.00 ]
Software : Log Converters
  • ALL2DTA - Win32 command line utility, that allows you to create Master Callsign Database file (DTA), used in many contesting programs, from different logs in ADIF, Cabrillo, and plain text formats.
    [ Hits: 376 | 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: 387 | 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: 1776 | Votes: 0 | Rating: 0.00 ]
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: 10509 | Votes: 9 | Rating: 7.77 ]
Technical Reference : Attenuators
  • Attenuators and Preamps - How to get the most from attenuators and preamps
    [ Hits: 1805 | Votes: 1 | Rating: 2.00 ]
Technical Reference : Components : Component Database
  • Datasheet Archive - Search engine for electronic component datasheets and application notes.
    [ Hits: 447 | 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: 3226 | Votes: 2 | Rating: 2.00 ]
Technical Reference : Sound Card Radio Interfacing
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