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507 links - and 2 categories

Antennas : 6M : 6 meter J-Pole Antenna
  • 50MHz / 6m J-pole Antenna by VK4ADC - The J-Pole is an easy-to-build and inexpensive device that provides an omni-directional vertically polarized antenna without the need for a ground plane. In technical terms, it is an end fed vertical 1/2 wave which is fed via a 1/4 wave matching stub.
    [ Hits: 439 | Votes: 4 | Rating: 6 ]
Antennas : 6M : 6 meter Yagi Antennas
  • 3 Elements Yagi LFA for 50 MHz - A short 3 element LFA Yagi for 50MHz with a 1.94M boom. This antenna has been designed in order to minimise the upward and downward lobes typically seen the the EL plane on Yagi antennas.
    [ Hits: 225 | Votes: 2 | Rating: 8 ]
Antennas : 70cm
  • Coaxial Collinear Antenna for 70 CM Band - This coaxial collinear antenna was built to test for my own consumption whether or not this antenna method actually works. the guiding principle is that we have multiple 1/4 wave elements fed in series , the radiation from each adds in phase to produce a large vertically polarised omni-directional antenna with substantial gain
    [ Hits: 565 | Votes: 3 | Rating: 6.33 ]
Antennas : Baluns
  • VHF Baluns: Fact and Fancy - Our ideas about HF baluns have changed dramatically in recent years. The focus today is very much on suppressing unwanted common-mode RF currents, to reduce both the received noise levels and the risks of causing interference on transmit.
    [ Hits: 282 | Votes: 0 | Rating: 0 ]
Antennas : J-Pole
  • Improving Gain of the Super J-Pole Antenna - The collinear J-Pole, often known as the Super-J, does improve the behavior over a regular J-Pole. there is an advantage when vertically combining 1/2 radiating sections to have a bit of separation between the half-wave end points. Get 0.8 dB more gain out of the trusty Super-J by replacing the traditional phasing stub with a long coil.
    [ Hits: 189 | Votes: 0 | Rating: 0 ]
Antennas : Portable
  • An automatically tuned 7 to 30 MHz mobile antenna - For every radio amateur who loves to travel by car, a mobile installation soon becomes a necessity. While in inhabited areas there is usually some coverage of VHF repeaters, in many other places VHF radios are useless. In these very places, HF can provide reliable contacts, and a lot of fun, from anywhere.
    [ Hits: 258 | Votes: 1 | Rating: 10 ]
Antennas : Theory
  • Improve your Antennas for Low Solar Activity - How to improve your transmitting antennas for very low solar activity periods, vertically polarized 160 meter antennas, horizontally polarized 80 to 10 meter antennas, single or stacked yagis, multi-tower stations
    [ Hits: 418 | Votes: 0 | Rating: 0 ]
DX Resources : QSLing
  • QSL Label Printing in ClubLog - Once you have designed your QSL label from the Label Settings screen, you will be able to print QSL labels and address labels from the OQRS requests submitted for your Call or Calls.
    [ Hits: 191 | Votes: 0 | Rating: 0 ]
Operating Aids : Grid Squares
  • Interactive Maidenhead Grid Square Locator Map - Amateur Radio Ham Radio Maidenhead Grid Square Locator Map online. This map allow just a point and click to determine dynamically the correct six characters locator. Other functions allow to calculate the distances among two given locators, or coordinates. Hover over map, specify grid, or enter latitude and longitude to show grid and/or calculate distance. Map is powered by Bing Maps.
    [ Hits: 2622 | Votes: 7 | Rating: 8 ]
Operating Aids : Maps
  • WW Locator Map of Italy - Amateur radio map of Italy with WW locators, provinces abbreviations and Call sign Prefixes, in a A3 size PDF file free to download, made available by IU3KJL Davide
    [ Hits: 377 | Votes: 4 | Rating: 7.75 ]
Radio Equipment : HF Transceivers : Icom IC-706
  • Icom 706MkIIG Frequency Calibration - Unlike older radios, the 706 uses only one crystal oscillator (called the Master Oscillator). All other frequencies in the radio (L.O., 3-4 I.F. stages, VFO, and CW-offset) are computer-derived from the Master Oscillator. This makes it relatively simple to frequency-align the radio, so that it agrees with the Frequency Display in all modes.
    [ Hits: 212 | Votes: 2 | Rating: 9 ]
Software : DX Cluster
  • ZCZ Cluster - Telnet client for DXCluster, Sorts, colours and filters DX Spots by (2) bands, wanted DX Station, who spotted the DX, local to your area and more, Can spot automatically after logging a contact if you are using ZCZ Log, Look up call on QRZ.com
    [ Hits: 158 | Votes: 0 | Rating: 0 ]
Software : Log Analysis
  • Master Callsign Database Editor - Master Callsign Database Editor allows to create and modify Super Check Partial database files used by many contesting programs in DTA and SCP formats. The files produced by Master Editor in DTA format can be used with CT, WriteLog, TRlog, SD, and others. The SCP versions of the produced files are for use with Win-Test, N1MM+, and others. Master Editor allows to create a callsign database from a separate log or from a set of logs in the Batch Import mode.
    [ Hits: 248 | Votes: 0 | Rating: 0 ]
Software : Logging
  • Emergency Net Log - The ARES Emergency Net Log application is specifically designed for use by ARES Net Control Stations.
    [ Hits: 226 | Votes: 0 | Rating: 0 ]
Software : QSL
  • AGWQSLPrint - Designing your own QSL card is now easier than ever. This is a Program that helps you design and then Print your QSL cards filling them automatically with QSO data.
    [ Hits: 522 | Votes: 1 | Rating: 1 ]
Software : Radio Control
  • CatBKT Universal CAT Control - Program for the control of the transceiver from your PC. Works on windows and has been tested with different serial and USB interfaces, Based on hamlib libraries , Auto CQ for repetitive calls, Audio Recorder, BktNetInterface for JTDX and WSJT-X
    [ Hits: 401 | Votes: 1 | Rating: 3 ]
Software : Time
  • BktTimeSync - BktTimeSync synchronizes the PC time using an internet time server (NTP server) or a GPS receiver connected to USB, serial port or Bluetooth. Great for use with digital modes like FT8, JT65, JT9, JS8Call and others. For the operation of this program requires an active internet connection or a GPS receiver. This program works on all versions of Windows 32 or 64 bit
    [ Hits: 1666 | Votes: 3 | Rating: 6.67 ]
Software : Weak Signal
  • WSJT DX Aggregator - WSJT DX Aggregator is a program that allows the stations using the WSJT-X or JTDX or MSHV programs to automatically upload DX reports to DXMAPS.com
    [ Hits: 132 | Votes: 0 | Rating: 0 ]
Technical Reference : Antenna Rotator
  • Mini Satellite-Antenna Rotator Mk1 - This project is a portable device used to automatically point a directional antenna towards an orbiting satellite. It takes all the effort out of little kids holding the antenna and figuring out where to point it. It allows students to talk through Amateur Radio satellites or download weather satellite images.
    [ Hits: 549 | Votes: 0 | Rating: 0 ]
Technical Reference : RF Safety
  • RF Exposure Evaluating Your Station - How do you practically conduct an RF exposure evaluation of your station? What information do you need and what values must you compute? What are the tools and techniques readily available to the casual operator to ensure compliance with the FCC regulations about RF exposure
    [ Hits: 198 | Votes: 0 | Rating: 0 ]

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