1/2 antenna

43 links

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: 33790 | Votes: 18 | Rating: 7.05 ]

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: 2839 | Votes: 4 | Rating: 5.75 ]

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: 20829 | Votes: 51 | Rating: 4.8 ]

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: 778 | Votes: 0 | Rating: 0 ]

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: 2862 | Votes: 6 | Rating: 9.83 ]
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: 4047 | Votes: 7 | Rating: 6.71 ]

20m EH antenna - G0KYA review of the EH antenna for 20 meters band
[ Hits: 1130 | Votes: 2 | Rating: 5.5 ]

EFHW Vertical Antenna - Steve G0KYA project of and End Fed 1/2 Vertical
[ Hits: 4284 | Votes: 5 | Rating: 6.8 ]

The Square Pole antenna - The SQUARE-Pole is a 1/2-wave dipole that has been bent into a square by WB2VUO
[ Hits: 2319 | Votes: 0 | Rating: 0 ]

2 Meter Indoor Slim Jim Antenna - 2 Meter Indoor Slim Jim Antennas for Cyclone Season and Other Uses by VK4MDX
[ Hits: 1323 | Votes: 3 | Rating: 2.67 ]

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: 4144 | Votes: 13 | Rating: 8.45 ]

Fundamentals of Off-Center-Fed Dipoles ^updated - 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: 4479 | Votes: 1 | Rating: 1 ]

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: 7563 | Votes: 14 | Rating: 4.86 ]

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: 2171 | Votes: 10 | Rating: 4.1 ]

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: 3056 | Votes: 1 | Rating: 8 ]

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: 20365 | Votes: 36 | Rating: 8.11 ]

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: 1598 | Votes: 7 | Rating: 8.86 ]

Motorcycle mobile: 1/2 or 5/8 wave antenna - Article on mobile ham radio antenna setup
[ Hits: 1789 | Votes: 2 | Rating: 5.5 ]

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: 2770 | Votes: 0 | Rating: 0 ]

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: 2989 | Votes: 4 | Rating: 6 ]