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352 links - and 5 categories

Antennas
  • The G4ZU Spider Beam or Skypper - This 3 elements wire Yagi comes along in a great variety of names. On the 11 meter is calle Skypper due to the manufacturer Alex 1SD019 On Ham bands is called Spider beam or G4ZU.
    [ Hits: 4753 | Votes: 20 | Rating: 4.59 ]
Antennas : 160M
  • 160 meter linear loaded Inverted L antenna - The total length of the inverted L is 240 feet, which is 7/16th of a wave length long. It has a 92 foot horizontal linear load section 1 foot above ground that terminates into a home-brewed parallel network tuner by KN4LF
    [ Hits: 3700 | Votes: 5 | Rating: 5.60 ]
  • Invisible DX antenna for the low bands - Article by DK5WL describes a multi-band DX antenna for the 160m-40m amateur radio bands with low visibility but great performance for long distance communication.
    [ Hits: 6253 | Votes: 1 | Rating: 1.00 ]
Antennas : 40M
  • 40M Reversible Moxon - W8EGB moxon project, each side is 51 feet long and the turned in sections are each 7.7ft long. This antenna performed similar to a full size two element yagi for 40 meters.
    [ Hits: 3802 | Votes: 2 | Rating: 9.00 ]
Antennas : 70cm
  • Portable 70cm Quadruple Quad Beam - A suitable high gain 70cms antenna for SOTA operation was sought that did not have the drawbacks of a long Yagi antenna, principally a narrow beamwidth and bandwidth.
    [ Hits: 3231 | Votes: 3 | Rating: 8.00 ]
Antennas : Baluns
  • Magnetic longwire balun - Magnetic longwire baluns 1:9 combined with ground, a 1:2 and 1:1 balun connections by ON6MU
    [ Hits: 4197 | Votes: 8 | Rating: 5.13 ]
  • QRP Magnetic longwire balun with VHF-splitter - This Magnetic Longwire Balun (MLB) makes it possible to efficiently use a coaxial lead-in cable with all forms of longwires, T-forms or other types of wire antennas, without the need for an antenna tuner.
    [ Hits: 2918 | Votes: 3 | Rating: 7.00 ]
Antennas : Feed Lines : Open Wire
  • Open Wire Feed Line a second look - Put up the longest dipole you can fit, feed it with open wire line, connect it to the balanced output of your tuner and—poof! Instant multiband antenna. Is life really that simple? By Paul Danzer, N1II
    [ Hits: 2074 | Votes: 4 | Rating: 3.25 ]
Antennas : Mobile
  • W5JGV Mobile Antenna - A High Efficiency Extended Length Mobile Antenna The antenna itself is 3.42 meters or 11 feet 2 inches long from the top of the mounting spring to the tip. By W5JGV
    [ Hits: 3583 | Votes: 4 | Rating: 7.25 ]
Antennas : Multiband
  • QRP Antenna 80-40-20-15 End Fed Antenna - A long wire antenna that will load up on 80, 40, 20 & 15 meters without an antenna tuner and without balun coils
    [ Hits: 5498 | Votes: 4 | Rating: 6.25 ]
Antennas : Theory : Antenna Gain
  • Antenna Gain to ERP - A radio's transmitting power can be concentrated along the horizon by use of a GAIN antenna. Although you may still be transmitting with four watts of power, your effective radiated powerwill be greatly increased. This table shows the effects of antenna gain on a transmitter with 4 watts of transmit power.
    [ Hits: 1241 | Votes: 4 | Rating: 4.50 ]
Antennas : Tuners Ham Radio : Blogs Ham Radio : Clubs : North America : USA : Washington Operating Aids : Distance & Bearing
  • Convert addresses to Latitude and Longitude - This online tool will convert any street address into latitude and longitude and vice-versa by executing queries to several online mapping services like googlemap geocoder maporama terraserver and more by Stephen P. Morse
    [ Hits: 2113 | Votes: 4 | Rating: 2.75 ]
Operating Modes : MFSK
  • Olivia, the Magic Digital Mode - Olivia MFSK digital communications are becoming popular in amateur radio because Olivia is one of the most robust methods of text keyboarding, that can perform superbly for long distance communications. Olivia frequencies, format and software
    [ Hits: 1750 | Votes: 8 | Rating: 8.38 ]
Operating Modes : WiFi : Long Range WiFi
  • Long Range Wi-Fi - Long range Wi-Fi antennas you can build. Helicals, parabolics, and biquads discussed. How to add external antennas to WUSB54GC and F5D7050 usb wireless adapters for long range connections.
    [ Hits: 10598 | Votes: 8 | Rating: 5.87 ]
Shopping and Services : Test equipment : Oscilloscope
  • Scientific Surplus - Buy, sell and trade electronic and scientific instruments. Oscilloscopes, microscopes, signal generators, RF equipment, short & long wave radios, meters and wattmeters, detectors (radiation, metal), spectrum & network analysers military equipment
    [ Hits: 552 | Votes: 0 | Rating: 0.00 ]
Software : PalmOS
  • FA Palm - Grid Square - Grid Square for Palm OS calculates the Maidenhead Grid Square for a given latitude and longitude.
    [ Hits: 538 | Votes: 1 | Rating: 10.00 ]
Technical Reference : Filters
  • Interdigital bandpass filter designer - Fill out the form to design a bandpass filter as described in the January 1985 issue of Ham Radio Magazine. These filters are generally limited to frequencies above 200 MHZ because their size is slightly longer than 1/4 wavelength
    [ Hits: 939 | Votes: 6 | Rating: 7.67 ]
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