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363 links - and 5 categories

Antennas : 20M
  • W5GI Mystery Antenna  pop - W5GI Mystery Antenna is a multi-band wire antenna that performs exceptionally well even though it confounds antenna modeling software. This antenna covers 80 to 6 meters with low feed point impedance and will work with most radios, with or without an antenna tuner. It is approximately 100 feet long, can handle the legal limit, and is easy and inexpensive to build. It is similar to a G5RV but a much better performer especially on 20 meters.
    [ Hits: 127411 | Votes: 110 | Rating: 7.95 ]
Antennas : 6M
  • 6 Meter 5/8 Wave Vertical Antenna  pop - The G3JVL 6 Meter ground plane vertical is a compact antenna that is ideal for portable operations. If needed, it can be disassembled into a very small bundle no longer than the longest element.
    [ Hits: 16963 | Votes: 9 | Rating: 6.23 ]
Antennas : 6M : 6 meter Yagi Antennas
  • 3 element 50 Mhz Yagi - A 3 elements long yagi antenna for 6 meters band by ON6MU
    [ Hits: 11886 | Votes: 40 | Rating: 4.58 ]
Antennas : 70cm
  • 70cm Longyagis - 70cm-Longyagis in 28Ohm-DK7ZB-Design
    [ Hits: 2344 | Votes: 3 | Rating: 7.00 ]
Antennas : Array
  • Yagi for 80 and 40 meters - Design plan of an array of a two element yagis for 80m and a 3 element 40m antenna sharing a single 12 meters long boom by EA5DY
    [ Hits: 1221 | Votes: 4 | Rating: 6.50 ]
Antennas : Dipole
  • Inverted Vee monoband antenna - This project will enable you to build a monoband long wire inverted vee with 3/4 wave length sides that will have a bit of gain
    [ Hits: 2047 | Votes: 1 | Rating: 10.00 ]
Antennas : K9AY
  • K9AY Flag Pennant Ewe - Elongated Terminated Loops, usage and details by K9AY Lewallen
    [ Hits: 1112 | Votes: 2 | Rating: 7.00 ]
Antennas : Shortwave
  • AMANDX Dipole - The longwire antenna is a very effective antenna for the listener who wants to cover all of the shortwave bands from 530 KHZ to 30 MHZ.a
    [ Hits: 3643 | Votes: 4 | Rating: 9.75 ]
Antennas : VHF UHF
  • DK7ZB 144 mhz Yagis - High gain, good pattern and acceptable bandwidth. These aims can be realized with a radiation-resistance of 25-35Ohms, because the 28-Ohm-feedpoint is very simple to match.
    [ Hits: 1763 | Votes: 7 | Rating: 6.86 ]
Antennas : Vertical
  • 6m Half wave vertical - This antenna is very useful for receiving or scanning purposes, but you can use it for transmitting, too. It is 2,94m long and has a pi-configuration (Collins-Filter) for the matching.
    [ Hits: 3649 | Votes: 4 | Rating: 7.75 ]
Antennas : WiFi
  • 43.33 Km LOS with USB WiFi stick  pop - Simple USB 802.11b WiFi adapter with original antenna used for this 27 miles long-range wifi connection test by adam 9A4QV.
    [ Hits: 50453 | Votes: 103 | Rating: 5.64 ]
Antennas : Windom
  • The FD4 (FD3) Windom Antenna  pop - The 4-band Fritzel model FD4 is a special version of a Windom antenna. It is a half-wave long on the lowest frequency, and is fed from a coax cable through a transformer inserted in the wire at one-third from one end
    [ Hits: 50896 | Votes: 83 | Rating: 5.33 ]
DX Resources : QSL manager
  • ON6DP QSL-Manager-Database - Qsl manager database files to download in multiple formats along to IOTA reference and other utilities
    [ Hits: 734 | Votes: 6 | Rating: 3.00 ]
Shopping and Services : RF Tubes
  • BEIJING ELJVT - Sell the China made electron tubes over a long period of time, the vacuum tubes/electron valves/Power tubes/Audio Tubes/Thyratrons/Magnetrons and accessories, the tube sockets, the vacuum capacitors, high voltage ceramic capacitors, aluminum electrolytic capacitor.
    [ Hits: 592 | Votes: 2 | Rating: 5.50 ]
Software : Grid Bearing and Maps
  • Pizza - This program allows both great-circle (polar) and rectangular projections of the world. The great-circle map is centered on any specified latitude and longitude (the "home" location). The rectangular projection is shown with the home longitude in the middle of the screen.
    [ Hits: 1152 | Votes: 4 | Rating: 7.75 ]
  • MU-Locator - This free program displays the location of any locator on a map. It calaculates between two Maidenhead locators the distance (km and miles) azimuth longitude latitude Show the location, direction and distance as you move your mouse on a map! Graphical Locator Program, By ON6MU
    [ Hits: 1547 | Votes: 4 | Rating: 5.50 ]
  • TinyLocator - This free program calculates the location of any locator. It calaculates the distance, azimuth, longitude and latitude between two Maidenhead locators. Converts longitude/latitude coordinates to Maidenhead locator Converts Maidenhead locator to longitude/latitude coordinates
    [ Hits: 903 | Votes: 1 | Rating: 10.00 ]
Software : PalmOS Software : RF Coverage Mapping
  • QRadioPredict - Radio propagation prediction tool for VHF-UHF, based on the Irregular Terrain Model, also known as Longley-Rice. Can be used as a repeater site planing tool. Has an internal APRS client which can be used to display stations as a landmark.
    [ Hits: 1519 | Votes: 11 | Rating: 3.64 ]
Technical Reference : Beacon keyers
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