1/2 antenna

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1/2 antenna

38 links

Antennas : 6M : 6 meter J-Pole Antenna
  • 50MHz J-Pole Antenna  pop - Need a general purpose antenna on the magic band? The J-Pole is an easy-to-build and inexpensive device that provides an omni-directional vertically polarised 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: 33657 | Votes: 18 | Rating: 7.05 ]
Antennas : 6M : 6 meter Moxon Antennas
  • WA0WOX 6 meter Moxon Antenna - Built around a 1/2" pvc frame, Larry's 6 meter moxon antenna is made from #8 aluminum ground wire
    [ Hits: 2735 | Votes: 2 | Rating: 6 ]
Antennas : 70cm
  • 440 Mhz J-Pole Antenna plans - Here is a 70cm (440 Mhz) J-Pole antenna that is inexpensive, and easy to build. Author use 1/2 inch copper pipe, and the associated fittings necessary. The dimensions aren't typical however, this is what it took to get its SWR low.
    [ Hits: 20463 | Votes: 49 | Rating: 4.92 ]
Antennas : 80M
  • K5LAD 80 meter antenna - A successful 80 meter antenna only 38 feet high on one end and 4 1/2 feet on the other
    [ Hits: 751 | Votes: 0 | Rating: 0 ]
Antennas : Dipole
  • Shortened Center-Fed Half-Wave Dipole - Design your owm HF shiortened dipole. Includes a diagram of a lumped-constant loaded dipole antenna that is intended to fit in available space, rather than requiring a full 1/2 wavelength, at a specified frequency
    [ Hits: 2808 | Votes: 5 | Rating: 9.8 ]
  • How to make a Simple Dipole Antenna - It is very easy to create a simple 1/2 wave dipole, all you need is some lengths of wire such as the core of some mains flex or even a straightened out metal coat hanger, some co-ax cable and a connector for your scanners antenna input
    [ Hits: 4012 | Votes: 7 | Rating: 6.71 ]
Antennas : EH
  • 20m EH antenna - G0KYA review of the EH antenna for 20 meters band
    [ Hits: 1077 | Votes: 2 | Rating: 5.5 ]
Antennas : End-Fed
  • EFHW Vertical Antenna - Steve G0KYA project of and End Fed 1/2 Vertical
    [ Hits: 4141 | Votes: 5 | Rating: 6.8 ]
Antennas : Halo
  • The Square Pole antenna - The SQUARE-Pole is a 1/2-wave dipole that has been bent into a square by WB2VUO
    [ Hits: 2279 | Votes: 0 | Rating: 0 ]
Antennas : Indoor Antennas : Multiband
  • G7FEK Limited space antenna - A small antenna for all amateur bands, including 80 meters, and in a small garden without the compromise. An ideal replacement for those half size antennas such as the 1/2 size G5RV and Windom 40
    [ Hits: 4075 | Votes: 13 | Rating: 8.45 ]
Antennas : OCF
  • Fundamentals of Off-Center-Fed Dipoles - Off-center-fed dipoles (OCFs) are 1/2-wavelength wire antennas fed at neither the center nor the end, but somewhere between--off-center
    [ Hits: 4406 | Votes: 0 | Rating: 0 ]
Antennas : Quad
  • BiQuad Antenna for 144/440 - This is a vertically polarized Broadside and Collinear Array each Loop is a vertically polarized Broadside Array both the right and the left side of the Loop is a bent 1/2 wave dipole working 180 degrees out of phase with the other one and that gives you 4.15dbi of gain by KE4UYP
    [ Hits: 7506 | Votes: 14 | Rating: 4.86 ]
Antennas : Theory : Impedance matching
  • Antena gamma match - Gamma match antenna is an antenna 1/2 additional lambda with the impedance matching more flexible arrangements (var capacitor) by sliding through the gamma match/road.
    [ Hits: 2103 | Votes: 9 | Rating: 3.78 ]
Antennas : Vertical
  • 6 meters band Half Wave vertical - 1/2wave vertical antenna for the 6-meterband and a 5/8 ground plane antenna for 50 Mhz
    [ Hits: 2995 | Votes: 1 | Rating: 8 ]
Antennas : Windom
  • OH7SV Matti Hohtola Ham Projects - The most modern QRP transceiver in 2004,Direct Conversion HF Transceiver with DDS LO, 50 ohm to 200 ohm HF wide band transformers, Wilkinson splitter for RX measurements, Windom baluns 2001/2004, Ferrite rod antenna for 80 meter, Magnetic Loop Antenna for 80 m, Mascot Switched PSU 9320 modification to 8A peak current, 150W MOSFET linear amplifier for 80m, 80 m HF SSB/CW Transceiver
    [ Hits: 20276 | Votes: 34 | Rating: 8 ]
Manufacturers : Antennas : HF : G5RV
  • Ni4L ANTENNAS & ELECTRONICS - Ham radio antennas and electronics, specialized in 1/2 wave dipole, OCF dipole, windom, full wave loop, end fed, inverted L, portable end fed antenna, long wire, SWL antenna, fan dipole, multiband dipole, G5RV and military antennas.
    [ Hits: 1560 | Votes: 6 | Rating: 10 ]
Operating Modes : Mobile : Motorcycle Radio Equipment : HF Vertical Antenna : Cushcraft R7
  • Troubleshooting Traps - This article refers mainly to the old Cushcraft 1/4 wavelength AV series of antennas (12AVQ, 14AVQ etc) hence the references to radials. The R series (R5, R7 etc) are 1/2 wavelength antennas, and the radials are NOT 1/4 wavelength resonant.
    [ Hits: 2734 | Votes: 0 | Rating: 0 ]
Technical Reference : Beacon keyers
  • N7KSB Milliwatt transmitter - N7KSB used this 1/2 watt CW transmitter, with a roof-mounted ground-plane antenna to work all continents and over 30 countries
    [ Hits: 2931 | Votes: 4 | Rating: 6 ]

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