do antenna

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do antenna

564 links - and 2 categories

Antennas : 20M : 20 meter Vertical Antennas
  • Vertical antenna for 20-15-10 m - This is a vertical multiband antenna made up of several aerial elements lambda/4 length, feeded with just a coaxial cable in French.
    [ Hits: 23550 | Votes: 20 | Rating: 5.2 ]
Antennas : 40M
  • JA7KPI Windom antenna for 40-80 - The total length of this antenna is 41m, height is about 11m, and diameter of element is 2mm. JA7KPI modified this antenna originally used as Inverted-V type of 80m band Dipole. Works on 40 - 80 meters band with acceptable swr.
    [ Hits: 7711 | Votes: 8 | Rating: 6.25 ]
  • 40 meter double bazooka antenna - A double bazooka antenna plan for the cw portion of the 40 meter band
    [ Hits: 9274 | Votes: 20 | Rating: 5.5 ]
Antennas : 40M : 40 meter Dipole Antennas
  • Trapped dipole for 80 and 40 m - This article explores a theoretical model for the losses of an 80m / 40m trapped inverted V dipole antenna system using a bootstrap coax trap, but does not examine the pattern of the antenna.
    [ Hits: 2730 | Votes: 0 | Rating: 0 ]
Antennas : Antenna Calculators Antennas : Dipole
  • An Improved Multiband Trap Dipole Antenna - This improved multiband trap dipole introduces a new trap design and a change in trap location. The antenna features double-coaxial-cable-wound traps having lower reactance and a higher quality factor (Q) than earlier coax-cable traps by W8NX
    [ Hits: 8726 | Votes: 5 | Rating: 6 ]
Antennas : End-Fed
  • Feeding an End-Fed Antenna - End-Fed antennas are NOT balanced systems; but neither are verticals, ground planes, discones, windoms, zepps, Marconis, half-slopers, et al. Additionally, the low-impedance antenna port of your transmitter/receiver is not balanced.
    [ Hits: 21453 | Votes: 22 | Rating: 7.33 ]
Antennas : HB9CV
  • The HB9CV antenna - Basics and principles of the HB9CV antenna by Rudolf Baumgartner. This antenna join electric advantages of the two elements direct feeded aerials with the mechanical advantages of the Yagi antennas, in French.
    [ Hits: 5850 | Votes: 13 | Rating: 7 ]
Antennas : Indoor
  • Shortened antennas - Drawings of shortened antenna for indoor usage, using short pvc tubes for 2 , 20 and 40 MHz by f1rfm
    [ Hits: 6845 | Votes: 3 | Rating: 4 ]
Antennas : J-Pole
  • The DBJ-2 portable J-Pole - A Portable VHF-UHF Roll-up J-pole Antennam that resonates on both bands but actually performs as a half wave radiator on both bands
    [ Hits: 4334 | Votes: 4 | Rating: 7 ]
Antennas : Magnetic Loop
  • 1.8 to 21 Mhz Magnetic Loop antenna - Magnetic loops are a compromise antenna and performance will be down on a full size-wire antenna particurlarly on lower HF Bands. This article compare this magnetic loop with a full-sized wire antenna on 80 meters by VK3YE
    [ Hits: 13696 | Votes: 40 | Rating: 6.12 ]
Antennas : Multiband
  • 6-Band Windom antenna  pop - Theory and construction of a novel trapless center-loaded off-center-fed (cl-ocf) dipole or windom antenna for the 80, 40, 30, 20, 15 and 10m hf amateur radio bands
    [ Hits: 50562 | Votes: 45 | Rating: 6.82 ]
Antennas : Satellite
  • Double Lazy H 435 MHz 10,8 dBd antenna - Drawings and pictures of compact antenna for 70cm band by LY2SS
    [ Hits: 2687 | Votes: 8 | Rating: 5.76 ]
  • The Eggbeater Antenna - Calculating and building an Eggbeater antenna. InstantTune and push-button Rx. Documentation available in french and english
    [ Hits: 6166 | Votes: 6 | Rating: 8.67 ]
Antennas : Theory Antennas : WiFi
  • Do-It-Yourself Wireless Antennas - Your guide to wireless antennas, how to build a wireless antenna without spending much money The Pringles Cantenna, Coffee Can Antenna, Parabolic Reflector and Antenna Designs. Combine a homemade Tripod Mount with an inexpensive Pistol Grip and go Wardriving.
    [ Hits: 10995 | Votes: 10 | Rating: 6.3 ]
Antennas : Windom
  • The Carolina windom antenna - Homebrewina a multiband windom antenna
    [ Hits: 5576 | Votes: 2 | Rating: 5.5 ]
  • Off-Center Feed - The Windom Antenna - The Windom antenna was widely used in the 1930s and is named after the amateur that wrote a comprehensive article about it
    [ Hits: 3566 | Votes: 1 | Rating: 2 ]
  • Windom Antenna with 4:1 balun - The Windom is an Off-center wire multiband Antenna. The old version was fed just by a single-wire connected on 1/3 of antenna's overall length or with an open-line feeder (later versions). Here is another model with coaxial feeder, which is compatible with Solid States - 50 Ohm output transceivers .
    [ Hits: 8025 | Votes: 9 | Rating: 6.89 ]
Antennas : Wire
  • The Zeppelin antenna - It consists of a radiating wire with a length equal to the half-wave of the fundamental frequency for which the antenna is cut.
    [ Hits: 2228 | Votes: 2 | Rating: 8 ]

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