eas antenna

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eas antenna

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Antennas : 23cm
  • Double Quad Antenna for 24cm - An easy to build double quad antenna that can be used as an antenna for beginners, it features a wide angle providing a generous alignment.
    [ Hits: 135 | Votes: 1 | Rating: 10 ]
Antennas : 70cm
  • 70 cm Helix Antenna - Helix antenna 432/435 MHz 14 turns. This 50 ohm impedance antenna allows, when fed with 25/50W of SSB RF, to join the orbiting satellites like AO-40 and AO-10 very easily
    [ Hits: 250 | Votes: 2 | Rating: 10 ]
Antennas : Antenna Calculators
  • Slim Jim Antenna Calculator by M0NWK - Easy to use online Slim Jim antenna calculator. Input your frequency to automatically calculate the lengths of the different antenna parts.
    [ Hits: 188 | Votes: 4 | Rating: 8.5 ]
Antennas : Delta loop
  • Single element Delta Loop Antenna  updated - Building a simple delta loop is very easy. With two fishing rods and some other material you can find in your local hardware store, you can build an efficient single element delta loop antenna
    [ Hits: 281 | Votes: 3 | Rating: 4.33 ]
Antennas : Dipole
  • Dipole Antennas - Basics - Antenna most often used by Hams around the world. Inexpensive, effective and easy to build, what more could anyone ask for in a home made antenna.
    [ Hits: 160 | Votes: 0 | Rating: 0 ]
Antennas : Feed Lines : Choke
  • High Performance common-mode chokes - May 2015 Radcom Article on common-mode chokes that can be used for control cables, phone lines, but mostly on typical HF antenna systems. This article explain what common mode chokes does, why you meay need one, properties common mode chokes should have, how to build and measure performances.
    [ Hits: 681 | Votes: 1 | Rating: 10 ]
Antennas : HexBeam
  • Spiderbeam VS Hex Beam - Differences of Hex Beam and Spiderbeam antennas designs, performance and measurements, rotor considerations when using this two kind of antennas
    [ Hits: 408 | Votes: 6 | Rating: 9.67 ]
Antennas : Loop
  • Quad Loop Antenna for 50 MHz - Building A Full-Wave Quad Loop Antenna for 6 Meters. This is an easy antenna to build and the materials cost about $15-20. It exhibits 1.8dB gain over a 1/2-wave dipole. Using an open-wire parallel feedline (commonly called ladder line) with an antenna tuner, it tunes up on the 10m band as a 5/8-wave loop as well
    [ Hits: 196 | Votes: 1 | Rating: 1 ]
Antennas : Magnetic Loop
  • Magnetic Loop Antenna for 2 meters - A small, easy to build, copper tube magnetic loop antenna for the 2 meters band. In Italian
    [ Hits: 275 | Votes: 3 | Rating: 9.33 ]
  • 2 meter Magnetic Loop Antenna - VHF Antenna in a Lunchbox, The Magnetic Loop on Two Metres. The two metre magnetic loop is a compact antenna which can easily be hung up under the eaves, the carport, or any other place where space is limited including indoors
    [ Hits: 515 | Votes: 1 | Rating: 1 ]
Antennas : Microwave
  • Basic Microwave Antennas - Utility-Driven Tradeoff Analysis, if you want to geto on the microwave bands , you will have to choose the proper antenna for your operating conditions. How to decide is not always easy, and you may also decide to build your own antenna.
    [ Hits: 356 | Votes: 1 | Rating: 9 ]
Antennas : Stealth
  • Balcony Dipole Antenna for 20 Meter - Antenna may be made practically from any wire (strand, solid) having a reasonable diameter 0.5 2.0 mm (24- 12 AWG). Antenna may be installed at any balcony of 3 to 6 meter length.
    [ Hits: 338 | Votes: 3 | Rating: 10 ]
Antennas : Theory
  • What We Can Expect from a 2-Element Beam - Method, Units of Measure, and the Dipole Standard of Reference. This article helps in understanding where does beam gain come from in directional aerials like in example Yagi antennas.
    [ Hits: 101 | Votes: 0 | Rating: 0 ]
Antennas : VHF UHF
  • FBK 2m-70cm dualband coax antenna - A travel, or a fixed vertical coax antenna originally designed by PA0FBK. This antenna is very easy to make from a piece of 50 ohm or 75 ohm coaxial cable, and can be either smooth, roll-up version, or rigid cable
    [ Hits: 350 | Votes: 3 | Rating: 9.33 ]
  • Double Quad Antenna for VHF UHF - The structure of this dual band VHF UHF antenna is very simple. It consists of two identical square loops, whose sides measure a quarter wave, connected together at the ends. A project by I5NZR
    [ Hits: 247 | Votes: 6 | Rating: 6.33 ]
Antennas : Vertical
  • 5 Band Pipe Vertical Antenna - A simple, cheap and easy to build 26 feet long vertical antenna that works DX on 20 - 10 meters including WARC Bands, it is designed for portability for field days, camping, or permanent installation, cost, and to achieve at least 1/2 wavelength on the WARC bands.
    [ Hits: 549 | Votes: 5 | Rating: 6.2 ]
Internet and Radio : WebSDR
  • Websdr Polska - RSP1A receiver with LoG (Loop On Ground) antenna in quiet QTH - southeastern Poland. Very low QRM!
    [ Hits: 89 | Votes: 2 | Rating: 2.5 ]
  • WebSDR in Andorra - Listen to online WebSDR located in Andorra Europe. Four receivers on 60m, 20m, 40m, and 80m, connected to a dipole antenna direction East/West
    [ Hits: 130 | Votes: 1 | Rating: 5 ]
Technical Reference : Antenna Switch
  • Antenna Switch - An home made antenna switch with a Dummy Load selector. If you forget the radio is connected to the open or grounded side of the switch and you try to transmit, it is very easy to damage the finals of your transceiver.
    [ Hits: 318 | Votes: 3 | Rating: 8 ]
Technical Reference : Receivers
  • A 3.5MHz Receiver for SSB and CW - Homemade receiver for 80 meters band. The receiver works very well (in fact better than some of its successors), especially the AGC makes listening to 80m QSOs a real pleasure. Sensitivity is not cutting-edge, but on a full-size short-wave antenna it is by fare sensitive enough.
    [ Hits: 248 | Votes: 2 | Rating: 6.5 ]

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